Release 0.1.4

Fix link broken by PR #164

.github/CONTRIBUTING.md

@@ -0,0 +1,30 @@
+# Bugs
+* Include version (Setting > About > Version)
+ * If not latest, try updating, it may have already been solved
+ * Debug version is equal to the number of commits as seen in the main page
+* Include steps to reproduce (if not obvious from description)
+* Include screenshot (if needed)
+* If it could be device-dependent, try reproducing on another device (if possible),  include results and device names, OS, modifications (root, Xposed)
+* **Before reporting a new issue, take a look at the [FAQ](https://github.com/inorichi/tachiyomi/wiki/FAQ), the [changelog](https://github.com/inorichi/tachiyomi/releases) and the already opened [issues](https://github.com/inorichi/tachiyomi/issues).**
+* For large logs use http://pastebin.com/ (or similar)
+* For multipart issues use list like this:
+ * [x] Done
+ * [ ] Not done
+```
+* [x] Done
+* [ ] Not done
+```
+
+DO: https://github.com/inorichi/tachiyomi/issues/24 https://github.com/inorichi/tachiyomi/issues/71
+
+DON'T: https://github.com/inorichi/tachiyomi/issues/75
+
+# Feature requests
+
+* Write a detailed issue, explaning what it should do or how. Avoid writing just "like X app does"
+* Include screenshot (if needed)
+
+# Translations
+
+File `app/src/main/res/values/strings.xml` should be copied over to appropriate directories and then translated.
+Consult [Android.com](http://developer.android.com/training/basics/supporting-devices/languages.html#CreateDirs)

.github/ISSUE_TEMPLATE.md

@@ -0,0 +1,6 @@
+**Please read https://github.com/inorichi/tachiyomi/blob/master/.github/CONTRIBUTING.md before posting**
+
+Remove line above and describe your issue here. Fill out version below.
+
+---
+Version: r000 or v0.0.0

README.md

@@ -1,8 +1,16 @@
+[![stable release](https://img.shields.io/badge/release-v0.1.4-blue.svg)](https://github.com/inorichi/tachiyomi/releases)
+[![fdroid release](https://img.shields.io/badge/release-F--Droid-blue.svg)](https://f-droid.org/repository/browse/?fdid=eu.kanade.tachiyomi)
+[![latest debug build](https://img.shields.io/badge/debug-latest%20build-blue.svg)](http://tachiyomi.kanade.eu/latest/app-debug.apk)
+
+## [Report an issue](https://github.com/inorichi/tachiyomi/blob/master/.github/CONTRIBUTING.md)
+
+**Before reporting a new issue, take a look at the [FAQ](https://github.com/inorichi/tachiyomi/wiki/FAQ), the [changelog](https://github.com/inorichi/tachiyomi/releases) and the already opened issues.**
+
 Tachiyomi is a free and open source manga reader for Android.
 
 Keep in mind it's still a beta, so expect it to crash sometimes.
 
-Current features:
+## Features
 
 * Online and offline reading
 * Configurable reader with multiple viewers and settings
@@ -12,11 +20,6 @@ Current features:
 * Schedule searching for updates
 * Categories to organize your library
 
-## Download
-
-[![stable release](https://img.shields.io/badge/release-v0.1.0-blue.svg)](https://github.com/inorichi/tachiyomi/releases/download/v0.1.0/tachiyomi-v0.1.0.apk)
-[![latest debug build](https://img.shields.io/badge/debug-latest%20build-blue.svg)](http://tachiyomi.kanade.eu/latest/app-debug.apk)
-
 ## License
 
     Copyright 2015 Javier Tomás

app/build.gradle

@@ -1,6 +1,5 @@
 import java.text.SimpleDateFormat
 
-apply plugin: 'android-sdk-manager'
 apply plugin: 'com.android.application'
 apply plugin: 'com.neenbedankt.android-apt'
 apply plugin: 'me.tatarka.retrolambda'
@@ -29,6 +28,10 @@ ext {
     }
 }
 
+def includeUpdater() {
+    return hasProperty("include_updater");
+}
+
 android {
     compileSdkVersion 23
     buildToolsVersion "23.0.2"
@@ -39,12 +42,13 @@ android {
         minSdkVersion 16
         targetSdkVersion 23
         testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
-        versionCode 2
+        versionCode 5
-        versionName "0.1.1"
+        versionName "0.1.4"
 
         buildConfigField "String", "COMMIT_COUNT", "\"${getCommitCount()}\""
         buildConfigField "String", "COMMIT_SHA", "\"${getGitSha()}\""
         buildConfigField "String", "BUILD_TIME", "\"${getBuildTime()}\""
+        buildConfigField "boolean", "INCLUDE_UPDATER", "${includeUpdater()}"
     }
 
     compileOptions {
@@ -73,19 +77,29 @@ android {
 
     lintOptions {
         abortOnError false
+        checkReleaseBuilds false
     }
 
 }
 
+apt {
+    arguments {
+        eventBusIndex "eu.kanade.tachiyomi.EventBusIndex"
+    }
+}
+
 dependencies {
     final SUPPORT_LIBRARY_VERSION = '23.1.1'
     final DAGGER_VERSION = '2.0.2'
-    final MOCKITO_VERSION = '1.10.19'
+    final EVENTBUS_VERSION = '3.0.0'
+    final OKHTTP_VERSION = '3.1.1'
     final STORIO_VERSION = '1.8.0'
     final ICEPICK_VERSION = '3.1.0'
+    final MOCKITO_VERSION = '1.10.19'
 
     compile fileTree(dir: 'libs', include: ['*.jar'])
     compile project(":SubsamplingScaleImageView")
+    compile project(":ReactiveNetwork")
 
     compile "com.android.support:support-v4:$SUPPORT_LIBRARY_VERSION"
     compile "com.android.support:appcompat-v7:$SUPPORT_LIBRARY_VERSION"
@@ -93,31 +107,33 @@ dependencies {
     compile "com.android.support:design:$SUPPORT_LIBRARY_VERSION"
     compile "com.android.support:recyclerview-v7:$SUPPORT_LIBRARY_VERSION"
     compile "com.android.support:support-annotations:$SUPPORT_LIBRARY_VERSION"
-    compile 'com.squareup.okhttp:okhttp-urlconnection:2.7.2'
+    compile "com.android.support:percent:$SUPPORT_LIBRARY_VERSION"
-    compile 'com.squareup.okhttp:okhttp:2.7.2'
+    compile "com.squareup.okhttp3:okhttp:$OKHTTP_VERSION"
+    compile "com.squareup.okhttp3:okhttp-urlconnection:$OKHTTP_VERSION"
     compile 'com.squareup.okio:okio:1.6.0'
     compile 'com.google.code.gson:gson:2.5'
     compile 'com.jakewharton:disklrucache:2.0.2'
     compile 'org.jsoup:jsoup:1.8.3'
     compile 'io.reactivex:rxandroid:1.1.0'
     compile 'io.reactivex:rxjava:1.1.0'
+    compile 'com.squareup.retrofit:retrofit:1.9.0'
     compile 'com.f2prateek.rx.preferences:rx-preferences:1.0.1'
     compile "com.pushtorefresh.storio:sqlite:$STORIO_VERSION"
     compile "com.pushtorefresh.storio:sqlite-annotations:$STORIO_VERSION"
     compile 'info.android15.nucleus:nucleus:2.0.4'
-    compile 'de.greenrobot:eventbus:2.4.0'
     compile 'com.github.bumptech.glide:glide:3.6.1'
     compile 'com.jakewharton:butterknife:7.0.1'
     compile 'com.jakewharton.timber:timber:4.1.0'
-    compile 'uk.co.ribot:easyadapter:1.5.0@aar'
+    compile 'ch.acra:acra:4.8.1'
-    compile 'ch.acra:acra:4.7.0'
     compile "frankiesardo:icepick:$ICEPICK_VERSION"
     provided "frankiesardo:icepick-processor:$ICEPICK_VERSION"
     compile 'com.github.dmytrodanylyk.android-process-button:library:1.0.4'
-    compile 'eu.davidea:flexible-adapter:4.2.0@aar'
+    compile 'eu.davidea:flexible-adapter:4.2.0'
     compile 'com.nononsenseapps:filepicker:2.5.1'
-    compile 'com.amulyakhare:com.amulyakhare.textdrawable:1.0.1'
+    compile 'com.github.amulyakhare:TextDrawable:558677e'
-    compile 'com.github.pwittchen:reactivenetwork:0.1.5'
+
+    compile "org.greenrobot:eventbus:$EVENTBUS_VERSION"
+    apt "org.greenrobot:eventbus-annotation-processor:$EVENTBUS_VERSION"
 
     compile "com.google.dagger:dagger:$DAGGER_VERSION"
     apt "com.google.dagger:dagger-compiler:$DAGGER_VERSION"
@@ -127,10 +143,15 @@ dependencies {
     compile('com.mikepenz:materialdrawer:4.6.4@aar') {
         transitive = true
     }
-    compile('com.github.afollestad.material-dialogs:core:0.8.5.3@aar') {
+
+    // Google material icons SVG.
+    compile 'com.mikepenz:google-material-typeface:2.1.0.1.original@aar'
+
+    compile('com.github.afollestad.material-dialogs:core:0.8.5.4@aar') {
         transitive = true
     }
 
+
     testCompile 'junit:junit:4.12'
     testCompile 'org.assertj:assertj-core:2.3.0'
     testCompile "org.mockito:mockito-core:$MOCKITO_VERSION"

app/proguard-rules.pro

@@ -8,9 +8,9 @@
 # OkHttp
 -keepattributes Signature
 -keepattributes *Annotation*
--keep class com.squareup.okhttp.** { *; }
+-keep class okhttp3.** { *; }
--keep interface com.squareup.okhttp.** { *; }
+-keep interface okhttp3.** { *; }
--dontwarn com.squareup.okhttp.**
+-dontwarn okhttp3.**
 -dontwarn okio.**
 
 # Okio
@@ -39,14 +39,17 @@
  }
 
 ## GreenRobot EventBus specific rules ##
-# https://github.com/greenrobot/EventBus/blob/master/HOWTO.md#proguard-configuration
+# http://greenrobot.org/eventbus/documentation/proguard/
+-keepattributes *Annotation*
 -keepclassmembers class ** {
-    public void onEvent*(***);
+    @org.greenrobot.eventbus.Subscribe <methods>;
 }
+-keep enum org.greenrobot.eventbus.ThreadMode { *; }
 
-# Don't warn for missing support classes
+# Only required if you use AsyncExecutor
--dontwarn de.greenrobot.event.util.*$Support
+-keepclassmembers class * extends org.greenrobot.eventbus.util.ThrowableFailureEvent {
--dontwarn de.greenrobot.event.util.*$SupportManagerFragment
+    <init>(java.lang.Throwable);
+}
 
 # Glide specific rules #
 # https://github.com/bumptech/glide
@@ -73,6 +76,27 @@
     rx.internal.util.atomic.LinkedQueueNode consumerNode;
 }
 
+# Retrofit 1.X
+
+-keep class com.squareup.okhttp.** { *; }
+-keep class retrofit.** { *; }
+-keep interface com.squareup.okhttp.** { *; }
+
+-dontwarn com.squareup.okhttp.**
+-dontwarn okio.**
+-dontwarn retrofit.**
+-dontwarn rx.**
+
+-keepclasseswithmembers class * {
+    @retrofit.http.* <methods>;
+}
+
+# If in your rest service interface you use methods with Callback argument.
+-keepattributes Exceptions
+
+# If your rest service methods throw custom exceptions, because you've defined an ErrorHandler.
+-keepattributes Signature
+
 # AppCombat
 -keep public class android.support.v7.widget.** { *; }
 -keep public class android.support.v7.internal.widget.** { *; }

app/src/main/java/eu/kanade/tachiyomi/App.java

@@ -5,6 +5,7 @@ import android.content.Context;
 
 import org.acra.ACRA;
 import org.acra.annotation.ReportsCrashes;
+import org.greenrobot.eventbus.EventBus;
 
 import eu.kanade.tachiyomi.injection.ComponentReflectionInjector;
 import eu.kanade.tachiyomi.injection.component.AppComponent;
@@ -23,6 +24,10 @@ public class App extends Application {
     AppComponent applicationComponent;
     ComponentReflectionInjector<AppComponent> componentInjector;
 
+    public static App get(Context context) {
+        return (App) context.getApplicationContext();
+    }
+
     @Override
     public void onCreate() {
         super.onCreate();
@@ -35,23 +40,28 @@ public class App extends Application {
         componentInjector =
                 new ComponentReflectionInjector<>(AppComponent.class, applicationComponent);
 
+        setupEventBus();
+
         ACRA.init(this);
     }
 
-    public static App get(Context context) {
+    protected void setupEventBus() {
-        return (App) context.getApplicationContext();
+        EventBus.builder()
+                .addIndex(new EventBusIndex())
+                .logNoSubscriberMessages(false)
+                .installDefaultEventBus();
     }
 
     public AppComponent getComponent() {
         return applicationComponent;
     }
 
-    public ComponentReflectionInjector<AppComponent> getComponentReflection() {
-        return componentInjector;
-    }
-
     // Needed to replace the component with a test specific one
     public void setComponent(AppComponent applicationComponent) {
         this.applicationComponent = applicationComponent;
     }
+
+    public ComponentReflectionInjector<AppComponent> getComponentReflection() {
+        return componentInjector;
+    }
 }

app/src/main/java/eu/kanade/tachiyomi/data/cache/ChapterCache.java

@@ -6,7 +6,6 @@ import android.text.format.Formatter;
 import com.google.gson.Gson;
 import com.google.gson.reflect.TypeToken;
 import com.jakewharton.disklrucache.DiskLruCache;
-import com.squareup.okhttp.Response;
 
 import java.io.BufferedOutputStream;
 import java.io.File;
@@ -17,26 +16,54 @@ import java.util.List;
 
 import eu.kanade.tachiyomi.data.source.model.Page;
 import eu.kanade.tachiyomi.util.DiskUtils;
+import okhttp3.Response;
 import okio.BufferedSink;
 import okio.Okio;
 import rx.Observable;
 
+/**
+ * Class used to create chapter cache
+ * For each image in a chapter a file is created
+ * For each chapter a Json list is created and converted to a file.
+ * The files are in format *md5key*.0
+ */
 public class ChapterCache {
 
+    /** Name of cache directory. */
     private static final String PARAMETER_CACHE_DIRECTORY = "chapter_disk_cache";
+
+    /** Application cache version. */
     private static final int PARAMETER_APP_VERSION = 1;
+
+    /** The number of values per cache entry. Must be positive. */
     private static final int PARAMETER_VALUE_COUNT = 1;
+
+    /** The maximum number of bytes this cache should use to store. */
     private static final int PARAMETER_CACHE_SIZE = 75 * 1024 * 1024;
 
-    private Context context;
+    /** Interface to global information about an application environment. */
-    private Gson gson;
+    private final Context context;
 
+    /** Google Json class used for parsing JSON files. */
+    private final Gson gson;
+
+    /** Cache class used for cache management. */
     private DiskLruCache diskCache;
 
+    /** Page list collection used for deserializing from JSON. */
+    private final Type pageListCollection;
+
+    /**
+     * Constructor of ChapterCache.
+     * @param context application environment interface.
+     */
     public ChapterCache(Context context) {
         this.context = context;
+
+        // Initialize Json handler.
         gson = new Gson();
 
+        // Try to open cache in default cache directory.
         try {
             diskCache = DiskLruCache.open(
                     new File(context.getCacheDir(), PARAMETER_CACHE_DIRECTORY),
@@ -47,80 +74,104 @@ public class ChapterCache {
         } catch (IOException e) {
             // Do Nothing.
         }
+
+        pageListCollection = new TypeToken<List<Page>>() {}.getType();
     }
 
-    public boolean remove(String file) {
+    /**
+     * Returns directory of cache.
+     * @return directory of cache.
+     */
+    public File getCacheDir() {
+        return diskCache.getDirectory();
+    }
+
+    /**
+     * Returns real size of directory.
+     * @return real size of directory.
+     */
+    private long getRealSize() {
+        return DiskUtils.getDirectorySize(getCacheDir());
+    }
+
+    /**
+     * Returns real size of directory in human readable format.
+     * @return real size of directory.
+     */
+    public String getReadableSize() {
+        return Formatter.formatFileSize(context, getRealSize());
+    }
+
+    /**
+     * Remove file from cache.
+     * @param file name of file "md5.0".
+     * @return status of deletion for the file.
+     */
+    public boolean removeFileFromCache(String file) {
+        // Make sure we don't delete the journal file (keeps track of cache).
         if (file.equals("journal") || file.startsWith("journal."))
             return false;
 
         try {
+            // Remove the extension from the file to get the key of the cache
             String key = file.substring(0, file.lastIndexOf("."));
+            // Remove file from cache.
             return diskCache.remove(key);
         } catch (IOException e) {
             return false;
         }
     }
 
-    public File getCacheDir() {
+    /**
-        return diskCache.getDirectory();
+     * Get page list from cache.
-    }
+     * @param chapterUrl the url of the chapter.
+     * @return an observable of the list of pages.
+     */
+    public Observable<List<Page>> getPageListFromCache(final String chapterUrl) {
+        return Observable.fromCallable(() -> {
+            // Initialize snapshot (a snapshot of the values for an entry).
+            DiskLruCache.Snapshot snapshot = null;
 
-    public long getRealSize() {
-        return DiskUtils.getDirectorySize(getCacheDir());
-    }
-
-    public String getReadableSize() {
-        return Formatter.formatFileSize(context, getRealSize());
-    }
-
-    public void setSize(int value) {
-        diskCache.setMaxSize(value * 1024 * 1024);
-    }
-
-    public Observable<List<Page>> getPageUrlsFromDiskCache(final String chapterUrl) {
-        return Observable.create(subscriber -> {
             try {
-                List<Page> pages = getPageUrlsFromDiskCacheImpl(chapterUrl);
+                // Create md5 key and retrieve snapshot.
-                subscriber.onNext(pages);
+                String key = DiskUtils.hashKeyForDisk(chapterUrl);
-                subscriber.onCompleted();
+                snapshot = diskCache.get(key);
-            } catch (Throwable e) {
+
-                subscriber.onError(e);
+                // Convert JSON string to list of objects.
+                return gson.fromJson(snapshot.getString(0), pageListCollection);
+
+            } finally {
+                if (snapshot != null) {
+                    snapshot.close();
+                }
             }
         });
     }
 
-    private List<Page> getPageUrlsFromDiskCacheImpl(String chapterUrl) throws IOException {
+    /**
-        DiskLruCache.Snapshot snapshot = null;
+     * Add page list to disk cache.
-        List<Page> pages = null;
+     * @param chapterUrl the url of the chapter.
-
+     * @param pages list of pages.
-        try {
+     */
-            String key = DiskUtils.hashKeyForDisk(chapterUrl);
+    public void putPageListToCache(final String chapterUrl, final List<Page> pages) {
-            snapshot = diskCache.get(key);
+        // Convert list of pages to json string.
-
-            Type collectionType = new TypeToken<List<Page>>() {}.getType();
-            pages = gson.fromJson(snapshot.getString(0), collectionType);
-        } catch (IOException e) {
-            // Do Nothing.
-        } finally {
-            if (snapshot != null) {
-                snapshot.close();
-            }
-        }
-        return pages;
-    }
-
-    public void putPageUrlsToDiskCache(final String chapterUrl, final List<Page> pages) {
         String cachedValue = gson.toJson(pages);
 
+        // Initialize the editor (edits the values for an entry).
         DiskLruCache.Editor editor = null;
+
+        // Initialize OutputStream.
         OutputStream outputStream = null;
+
         try {
+            // Get editor from md5 key.
             String key = DiskUtils.hashKeyForDisk(chapterUrl);
             editor = diskCache.edit(key);
             if (editor == null) {
                 return;
             }
 
+            // Write chapter urls to cache.
             outputStream = new BufferedOutputStream(editor.newOutputStream(0));
             outputStream.write(cachedValue.getBytes());
             outputStream.flush();
@@ -143,37 +194,57 @@ public class ChapterCache {
         }
     }
 
+    /**
+     * Check if image is in cache.
+     * @param imageUrl url of image.
+     * @return true if in cache otherwise false.
+     */
     public boolean isImageInCache(final String imageUrl) {
         try {
             return diskCache.get(DiskUtils.hashKeyForDisk(imageUrl)) != null;
         } catch (IOException e) {
-            e.printStackTrace();
+            return false;
         }
-        return false;
     }
 
+    /**
+     * Get image path from url.
+     * @param imageUrl url of image.
+     * @return path of image.
+     */
     public String getImagePath(final String imageUrl) {
         try {
+            // Get file from md5 key.
             String imageName = DiskUtils.hashKeyForDisk(imageUrl) + ".0";
             File file = new File(diskCache.getDirectory(), imageName);
             return file.getCanonicalPath();
         } catch (IOException e) {
-            e.printStackTrace();
+            return null;
         }
-        return null;
     }
 
-    public void putImageToDiskCache(final String imageUrl, final Response response) throws IOException {
+    /**
+     * Add image to cache.
+     * @param imageUrl url of image.
+     * @param response http response from page.
+     * @throws IOException image error.
+     */
+    public void putImageToCache(final String imageUrl, final Response response) throws IOException {
+        // Initialize editor (edits the values for an entry).
         DiskLruCache.Editor editor = null;
+
+        // Initialize BufferedSink (used for small writes).
         BufferedSink sink = null;
 
         try {
+            // Get editor from md5 key.
             String key = DiskUtils.hashKeyForDisk(imageUrl);
             editor = diskCache.edit(key);
             if (editor == null) {
                 throw new IOException("Unable to edit key");
             }
 
+            // Initialize OutputStream and write image.
             OutputStream outputStream = new BufferedOutputStream(editor.newOutputStream(0));
             sink = Okio.buffer(Okio.sink(outputStream));
             sink.writeAll(response.body().source());
@@ -181,6 +252,7 @@ public class ChapterCache {
             diskCache.flush();
             editor.commit();
         } catch (Exception e) {
+            response.body().close();
             throw new IOException("Unable to save image");
         } finally {
             if (editor != null) {
@@ -190,7 +262,6 @@ public class ChapterCache {
                 sink.close();
             }
         }
-
     }
 
 }

app/src/main/java/eu/kanade/tachiyomi/data/cache/CoverCache.java

@@ -1,6 +1,7 @@
 package eu.kanade.tachiyomi.data.cache;
 
 import android.content.Context;
+import android.support.annotation.Nullable;
 import android.text.TextUtils;
 import android.widget.ImageView;
 
@@ -10,6 +11,7 @@ import com.bumptech.glide.load.model.GlideUrl;
 import com.bumptech.glide.load.model.LazyHeaders;
 import com.bumptech.glide.request.animation.GlideAnimation;
 import com.bumptech.glide.request.target.SimpleTarget;
+import com.bumptech.glide.signature.StringSignature;
 
 import java.io.File;
 import java.io.FileInputStream;
@@ -20,33 +22,76 @@ import java.io.OutputStream;
 
 import eu.kanade.tachiyomi.util.DiskUtils;
 
+/**
+ * Class used to create cover cache
+ * It is used to store the covers of the library.
+ * Makes use of Glide (which can avoid repeating requests) to download covers.
+ * Names of files are created with the md5 of the thumbnail URL
+ */
 public class CoverCache {
 
+    /**
+     * Name of cache directory.
+     */
     private static final String PARAMETER_CACHE_DIRECTORY = "cover_disk_cache";
 
-    private Context context;
+    /**
-    private File cacheDir;
+     * Interface to global information about an application environment.
+     */
+    private final Context context;
 
+    /**
+     * Cache directory used for cache management.
+     */
+    private final File cacheDir;
+
+    /**
+     * Constructor of CoverCache.
+     *
+     * @param context application environment interface.
+     */
     public CoverCache(Context context) {
         this.context = context;
+
+        // Get cache directory from parameter.
         cacheDir = new File(context.getCacheDir(), PARAMETER_CACHE_DIRECTORY);
+
+        // Create cache directory.
         createCacheDir();
     }
 
+    /**
+     * Create cache directory if it doesn't exist
+     *
+     * @return true if cache dir is created otherwise false.
+     */
     private boolean createCacheDir() {
         return !cacheDir.exists() && cacheDir.mkdirs();
     }
 
+    /**
+     * Download the cover with Glide and save the file in this cache.
+     *
+     * @param thumbnailUrl url of thumbnail.
+     * @param headers      headers included in Glide request.
+     */
     public void save(String thumbnailUrl, LazyHeaders headers) {
         save(thumbnailUrl, headers, null);
     }
 
-    // Download the cover with Glide (it can avoid repeating requests) and save the file on this cache
+    /**
-    // Optionally, load the image in the given image view when the resource is ready, if not null
+     * Download the cover with Glide and save the file.
-    public void save(String thumbnailUrl, LazyHeaders headers, ImageView imageView) {
+     *
+     * @param thumbnailUrl url of thumbnail.
+     * @param headers      headers included in Glide request.
+     * @param imageView    imageView where picture should be displayed.
+     */
+    private void save(String thumbnailUrl, LazyHeaders headers, @Nullable ImageView imageView) {
+        // Check if url is empty.
         if (TextUtils.isEmpty(thumbnailUrl))
             return;
 
+        // Download the cover with Glide and save the file.
         GlideUrl url = new GlideUrl(thumbnailUrl, headers);
         Glide.with(context)
                 .load(url)
@@ -54,29 +99,44 @@ public class CoverCache {
                     @Override
                     public void onResourceReady(File resource, GlideAnimation<? super File> anim) {
                         try {
-                            add(thumbnailUrl, resource);
+                            // Copy the cover from Glide's cache to local cache.
+                            copyToLocalCache(thumbnailUrl, resource);
+
+                            // Check if imageView isn't null and show picture in imageView.
                             if (imageView != null) {
                                 loadFromCache(imageView, resource);
                             }
                         } catch (IOException e) {
-                            e.printStackTrace();
+                            // Do nothing.
                         }
                     }
                 });
     }
 
-    // Copy the cover from Glide's cache to this cache
+    /**
-    public void add(String thumbnailUrl, File source) throws IOException {
+     * Copy the cover from Glide's cache to this cache.
+     *
+     * @param thumbnailUrl url of thumbnail.
+     * @param source       the cover image.
+     * @throws IOException exception returned
+     */
+    public void copyToLocalCache(String thumbnailUrl, File source) throws IOException {
+        // Create cache directory if needed.
         createCacheDir();
+
+        // Get destination file.
         File dest = new File(cacheDir, DiskUtils.hashKeyForDisk(thumbnailUrl));
+
+        // Delete the current file if it exists.
         if (dest.exists())
             dest.delete();
 
+        // Write thumbnail image to file.
         InputStream in = new FileInputStream(source);
         try {
             OutputStream out = new FileOutputStream(dest);
             try {
-                // Transfer bytes from in to out
+                // Transfer bytes from in to out.
                 byte[] buf = new byte[1024];
                 int len;
                 while ((len = in.read(buf)) > 0) {
@@ -90,23 +150,43 @@ public class CoverCache {
         }
     }
 
-    // Get the cover from cache
+
-    public File get(String thumbnailUrl) {
+    /**
+     * Returns the cover from cache.
+     *
+     * @param thumbnailUrl the thumbnail url.
+     * @return cover image.
+     */
+    private File getCoverFromCache(String thumbnailUrl) {
         return new File(cacheDir, DiskUtils.hashKeyForDisk(thumbnailUrl));
     }
 
-    // Delete the cover from cache
+    /**
-    public boolean delete(String thumbnailUrl) {
+     * Delete the cover file from the cache.
+     *
+     * @param thumbnailUrl the thumbnail url.
+     * @return status of deletion.
+     */
+    public boolean deleteCoverFromCache(String thumbnailUrl) {
+        // Check if url is empty.
         if (TextUtils.isEmpty(thumbnailUrl))
             return false;
 
+        // Remove file.
         File file = new File(cacheDir, DiskUtils.hashKeyForDisk(thumbnailUrl));
         return file.exists() && file.delete();
     }
 
-    // Save and load the image from cache
+    /**
-    public void saveAndLoadFromCache(ImageView imageView, String thumbnailUrl, LazyHeaders headers) {
+     * Save or load the image from cache
-        File localCover = get(thumbnailUrl);
+     *
+     * @param imageView    imageView where picture should be displayed.
+     * @param thumbnailUrl the thumbnail url.
+     * @param headers      headers included in Glide request.
+     */
+    public void saveOrLoadFromCache(ImageView imageView, String thumbnailUrl, LazyHeaders headers) {
+        // If file exist load it otherwise save it.
+        File localCover = getCoverFromCache(thumbnailUrl);
         if (localCover.exists()) {
             loadFromCache(imageView, localCover);
         } else {
@@ -114,29 +194,36 @@ public class CoverCache {
         }
     }
 
-    // If the image is already in our cache, use it. If not, load it with glide
+    /**
-    public void loadFromCacheOrNetwork(ImageView imageView, String thumbnailUrl, LazyHeaders headers) {
+     * Helper method to load the cover from the cache directory into the specified image view.
-        File localCover = get(thumbnailUrl);
+     * Glide stores the resized image in its cache to improve performance.
-        if (localCover.exists()) {
+     *
-            loadFromCache(imageView, localCover);
+     * @param imageView imageView where picture should be displayed.
-        } else {
+     * @param file      file to load. Must exist!.
-            loadFromNetwork(imageView, thumbnailUrl, headers);
+     */
-        }
-    }
-
-    // Helper method to load the cover from the cache directory into the specified image view
-    // The file must exist
     private void loadFromCache(ImageView imageView, File file) {
         Glide.with(context)
                 .load(file)
-                .diskCacheStrategy(DiskCacheStrategy.NONE)
+                .diskCacheStrategy(DiskCacheStrategy.RESULT)
                 .centerCrop()
+                .signature(new StringSignature(String.valueOf(file.lastModified())))
                 .into(imageView);
     }
 
-    // Helper method to load the cover from network into the specified image view.
+    /**
-    // It does NOT save the image in cache
+     * Helper method to load the cover from network into the specified image view.
+     * The source image is stored in Glide's cache so that it can be easily copied to this cache
+     * if the manga is added to the library.
+     *
+     * @param imageView    imageView where picture should be displayed.
+     * @param thumbnailUrl url of thumbnail.
+     * @param headers      headers included in Glide request.
+     */
     public void loadFromNetwork(ImageView imageView, String thumbnailUrl, LazyHeaders headers) {
+        // Check if url is empty.
+        if (TextUtils.isEmpty(thumbnailUrl))
+            return;
+
         GlideUrl url = new GlideUrl(thumbnailUrl, headers);
         Glide.with(context)
                 .load(url)

app/src/main/java/eu/kanade/tachiyomi/data/cache/CoverGlideModule.java

@@ -5,17 +5,26 @@ import android.content.Context;
 import com.bumptech.glide.Glide;
 import com.bumptech.glide.GlideBuilder;
 import com.bumptech.glide.load.DecodeFormat;
+import com.bumptech.glide.load.engine.cache.InternalCacheDiskCacheFactory;
 import com.bumptech.glide.module.GlideModule;
 
+/**
+ * Class used to update Glide module settings
+ */
 public class CoverGlideModule implements GlideModule {
 
     @Override
     public void applyOptions(Context context, GlideBuilder builder) {
+        // Bitmaps decoded from most image formats (other than GIFs with hidden configs)
+        // will be decoded with the ARGB_8888 config.
         builder.setDecodeFormat(DecodeFormat.PREFER_ARGB_8888);
+
+        // Set the cache size of Glide to 15 MiB
+        builder.setDiskCache(new InternalCacheDiskCacheFactory(context, 15 * 1024 * 1024));
     }
 
     @Override
     public void registerComponents(Context context, Glide glide) {
-
+        // Nothing to see here!
     }
 }

app/src/main/java/eu/kanade/tachiyomi/data/database/DatabaseHelper.java

@@ -19,6 +19,7 @@ import com.pushtorefresh.storio.sqlite.queries.RawQuery;
 
 import java.util.Date;
 import java.util.List;
+import java.util.TreeSet;
 
 import eu.kanade.tachiyomi.data.database.models.Category;
 import eu.kanade.tachiyomi.data.database.models.CategorySQLiteTypeMapping;
@@ -162,11 +163,11 @@ public class DatabaseHelper {
                 .prepare();
     }
 
-    public PreparedGetListOfObjects<MangaChapter> getRecentChapters() {
+    public PreparedGetListOfObjects<MangaChapter> getRecentChapters(Date date) {
         return db.get()
                 .listOfObjects(MangaChapter.class)
                 .withQuery(RawQuery.builder()
-                        .query(MangaChapterGetResolver.RECENT_CHAPTERS_QUERY)
+                        .query(MangaChapterGetResolver.getRecentChaptersQuery(date))
                         .observesTables(ChapterTable.TABLE)
                         .build())
                 .withGetResolver(MangaChapterGetResolver.INSTANCE)
@@ -259,21 +260,32 @@ public class DatabaseHelper {
             int deleted = 0;
             db.internal().beginTransaction();
             try {
+                TreeSet<Float> deletedReadChapterNumbers = new TreeSet<>();
+                if (!toDelete.isEmpty()) {
+                    for (Chapter c : toDelete) {
+                        if (c.read) {
+                            deletedReadChapterNumbers.add(c.chapter_number);
+                        }
+                    }
+                    deleted = deleteChapters(toDelete).executeAsBlocking().results().size();
+                }
+
                 if (!toAdd.isEmpty()) {
                     // Set the date fetch for new items in reverse order to allow another sorting method.
                     // Sources MUST return the chapters from most to less recent, which is common.
                     long now = new Date().getTime();
 
                     for (int i = toAdd.size() - 1; i >= 0; i--) {
-                        toAdd.get(i).date_fetch = now++;
+                        Chapter c = toAdd.get(i);
+                        c.date_fetch = now++;
+                        // Try to mark already read chapters as read when the source deletes them
+                        if (c.chapter_number != -1 && deletedReadChapterNumbers.contains(c.chapter_number)) {
+                            c.read = true;
+                        }
                     }
                     added = insertChapters(toAdd).executeAsBlocking().numberOfInserts();
                 }
 
-                if (!toDelete.isEmpty()) {
-                    deleted = deleteChapters(toDelete).executeAsBlocking().results().size();
-                }
-
                 db.internal().setTransactionSuccessful();
             } finally {
                 db.internal().endTransaction();

app/src/main/java/eu/kanade/tachiyomi/data/database/models/Chapter.java

@@ -4,8 +4,11 @@ import com.pushtorefresh.storio.sqlite.annotations.StorIOSQLiteColumn;
 import com.pushtorefresh.storio.sqlite.annotations.StorIOSQLiteType;
 
 import java.io.Serializable;
+import java.util.List;
 
 import eu.kanade.tachiyomi.data.database.tables.ChapterTable;
+import eu.kanade.tachiyomi.data.download.model.Download;
+import eu.kanade.tachiyomi.data.source.model.Page;
 import eu.kanade.tachiyomi.util.UrlUtil;
 
 @StorIOSQLiteType(table = ChapterTable.TABLE)
@@ -40,6 +43,8 @@ public class Chapter implements Serializable {
 
     public int status;
 
+    private transient List<Page> pages;
+
     public Chapter() {}
 
     public void setUrl(String url) {
@@ -68,4 +73,15 @@ public class Chapter implements Serializable {
         return chapter;
     }
 
+    public List<Page> getPages() {
+        return pages;
+    }
+
+    public void setPages(List<Page> pages) {
+        this.pages = pages;
+    }
+
+    public boolean isDownloaded() {
+        return status == Download.DOWNLOADED;
+    }
 }

app/src/main/java/eu/kanade/tachiyomi/data/database/models/Manga.java

@@ -68,6 +68,25 @@ public class Manga implements Serializable {
     public static final int COMPLETED = 2;
     public static final int LICENSED = 3;
 
+    public static final int SORT_AZ   = 0x00000000;
+    public static final int SORT_ZA   = 0x00000001;
+    public static final int SORT_MASK = 0x00000001;
+
+    public static final int SHOW_UNREAD = 0x00000002;
+    public static final int SHOW_READ   = 0x00000004;
+    public static final int READ_MASK   = 0x00000006;
+
+    public static final int SHOW_DOWNLOADED     = 0x00000008;
+    public static final int SHOW_NOT_DOWNLOADED = 0x00000010;
+    public static final int DOWNLOADED_MASK     = 0x00000018;
+
+    // Generic filter that does not filter anything
+    public static final int SHOW_ALL    = 0x00000000;
+
+    public static final int DISPLAY_NAME   = 0x00000000;
+    public static final int DISPLAY_NUMBER = 0x00100000;
+    public static final int DISPLAY_MASK   = 0x00100000;
+
     public Manga() {}
 
     public static Manga create(String pathUrl) {
@@ -120,6 +139,43 @@ public class Manga implements Serializable {
         }
     }
 
+    public void setChapterOrder(int order) {
+        setFlags(order, SORT_MASK);
+    }
+
+    public void setDisplayMode(int mode) {
+        setFlags(mode, DISPLAY_MASK);
+    }
+
+    public void setReadFilter(int filter) {
+        setFlags(filter, READ_MASK);
+    }
+
+    public void setDownloadedFilter(int filter) {
+        setFlags(filter, DOWNLOADED_MASK);
+    }
+
+    private void setFlags(int flag, int mask) {
+        chapter_flags = (chapter_flags & ~mask) | (flag & mask);
+    }
+
+    public boolean sortChaptersAZ() {
+        return (chapter_flags & SORT_MASK) == SORT_AZ;
+    }
+
+    // Used to display the chapter's title one way or another
+    public int getDisplayMode() {
+        return chapter_flags & DISPLAY_MASK;
+    }
+
+    public int getReadFilter() {
+        return chapter_flags & READ_MASK;
+    }
+
+    public int getDownloadedFilter() {
+        return chapter_flags & DOWNLOADED_MASK;
+    }
+
     @Override
     public boolean equals(Object o) {
         if (this == o) return true;

app/src/main/java/eu/kanade/tachiyomi/data/database/resolvers/MangaChapterGetResolver.java

@@ -5,6 +5,8 @@ import android.support.annotation.NonNull;
 
 import com.pushtorefresh.storio.sqlite.operations.get.DefaultGetResolver;
 
+import java.util.Date;
+
 import eu.kanade.tachiyomi.data.database.models.Chapter;
 import eu.kanade.tachiyomi.data.database.models.ChapterStorIOSQLiteGetResolver;
 import eu.kanade.tachiyomi.data.database.models.Manga;
@@ -24,10 +26,12 @@ public class MangaChapterGetResolver extends DefaultGetResolver<MangaChapter> {
             MangaTable.COLUMN_ID,
             ChapterTable.COLUMN_MANGA_ID);
 
-    public static final String RECENT_CHAPTERS_QUERY = String.format(
+    public static String getRecentChaptersQuery(Date date) {
-            QUERY + " WHERE %1$s = 1 ORDER BY %2$s DESC LIMIT 100",
+        return QUERY + String.format(" WHERE %1$s = 1 AND %2$s > %3$d ORDER BY %2$s DESC",
-            MangaTable.COLUMN_FAVORITE,
+                MangaTable.COLUMN_FAVORITE,
-            ChapterTable.COLUMN_DATE_UPLOAD);
+                ChapterTable.COLUMN_DATE_UPLOAD,
+                date.getTime());
+    }
 
     @NonNull
     private final MangaStorIOSQLiteGetResolver mangaGetResolver;
@@ -45,6 +49,7 @@ public class MangaChapterGetResolver extends DefaultGetResolver<MangaChapter> {
     public MangaChapter mapFromCursor(@NonNull Cursor cursor) {
         final Manga manga = mangaGetResolver.mapFromCursor(cursor);
         final Chapter chapter = chapterGetResolver.mapFromCursor(cursor);
+        manga.id = chapter.manga_id;
 
         return new MangaChapter(manga, chapter);
     }

app/src/main/java/eu/kanade/tachiyomi/data/download/DownloadManager.java

@@ -8,7 +8,6 @@ import com.google.gson.reflect.TypeToken;
 import com.google.gson.stream.JsonReader;
 
 import java.io.File;
-import java.io.FileNotFoundException;
 import java.io.FileOutputStream;
 import java.io.FileReader;
 import java.io.IOException;
@@ -26,6 +25,8 @@ import eu.kanade.tachiyomi.data.source.base.Source;
 import eu.kanade.tachiyomi.data.source.model.Page;
 import eu.kanade.tachiyomi.event.DownloadChaptersEvent;
 import eu.kanade.tachiyomi.util.DiskUtils;
+import eu.kanade.tachiyomi.util.DynamicConcurrentMergeOperator;
+import eu.kanade.tachiyomi.util.UrlUtil;
 import rx.Observable;
 import rx.Subscription;
 import rx.android.schedulers.AndroidSchedulers;
@@ -45,6 +46,9 @@ public class DownloadManager {
     private BehaviorSubject<Boolean> runningSubject;
     private Subscription downloadsSubscription;
 
+    private BehaviorSubject<Integer> threadsSubject;
+    private Subscription threadsSubscription;
+
     private DownloadQueue queue;
     private volatile boolean isRunning;
 
@@ -60,15 +64,19 @@ public class DownloadManager {
 
         downloadsQueueSubject = PublishSubject.create();
         runningSubject = BehaviorSubject.create();
+        threadsSubject = BehaviorSubject.create();
     }
 
     private void initializeSubscriptions() {
         if (downloadsSubscription != null && !downloadsSubscription.isUnsubscribed())
             downloadsSubscription.unsubscribe();
 
+        threadsSubscription = preferences.downloadThreads().asObservable()
+                .subscribe(threadsSubject::onNext);
+
         downloadsSubscription = downloadsQueueSubject
-                .concatMap(downloads -> Observable.from(downloads)
+                .flatMap(Observable::from)
-                        .flatMap(this::downloadChapter, preferences.downloadThreads()))
+                .lift(new DynamicConcurrentMergeOperator<>(this::downloadChapter, threadsSubject))
                 .onBackpressureBuffer()
                 .observeOn(AndroidSchedulers.mainThread())
                 .map(download -> areAllDownloadsFinished())
@@ -76,7 +84,7 @@ public class DownloadManager {
                     if (finished) {
                         DownloadService.stop(context);
                     }
-                }, e -> Timber.e(e.getCause(), e.getMessage()));
+                }, e -> DownloadService.stop(context));
 
         if (!isRunning) {
             isRunning = true;
@@ -94,6 +102,11 @@ public class DownloadManager {
             downloadsSubscription.unsubscribe();
             downloadsSubscription = null;
         }
+
+        if (threadsSubscription != null && !threadsSubscription.isUnsubscribed()) {
+            threadsSubscription.unsubscribe();
+        }
+
     }
 
     // Create a download object for every chapter in the event and add them to the downloads queue
@@ -181,8 +194,7 @@ public class DownloadManager {
                 // Or if the page list already exists, start from the file
                 Observable.just(download.pages);
 
-        return pageListObservable
+        return Observable.defer(() -> pageListObservable
-                .subscribeOn(Schedulers.io())
                 .doOnNext(pages -> {
                     download.downloadedImages = 0;
                     download.setStatus(Download.DOWNLOADING);
@@ -199,7 +211,8 @@ public class DownloadManager {
                 .onErrorResumeNext(error -> {
                     download.setStatus(Download.ERROR);
                     return Observable.just(download);
-                });
+                }))
+                .subscribeOn(Schedulers.io());
     }
 
     // Get the image from the filesystem if it exists or download from network
@@ -271,6 +284,15 @@ public class DownloadManager {
     // Get the filename for an image given the page
     private String getImageFilename(Page page) {
         String url = page.getImageUrl();
+        int number = page.getPageNumber() + 1;
+        // Try to preserve file extension
+        if (UrlUtil.isJpg(url)) {
+            return number + ".jpg";
+        } else if (UrlUtil.isPng(url)) {
+            return number + ".png";
+        } else if (UrlUtil.isGif(url)) {
+            return number + ".gif";
+        }
         return Uri.parse(url).getLastPathSegment().replaceAll("[^\\sa-zA-Z0-9.-]", "_");
     }
 
@@ -306,7 +328,6 @@ public class DownloadManager {
 
     // Return the page list from the chapter's directory if it exists, null otherwise
     public List<Page> getSavedPageList(Source source, Manga manga, Chapter chapter) {
-        List<Page> pages = null;
         File chapterDir = getAbsoluteChapterDirectory(source, manga, chapter);
         File pagesFile = new File(chapterDir, PAGE_LIST_FILE);
 
@@ -315,14 +336,14 @@ public class DownloadManager {
             if (pagesFile.exists()) {
                 reader = new JsonReader(new FileReader(pagesFile.getAbsolutePath()));
                 Type collectionType = new TypeToken<List<Page>>() {}.getType();
-                pages = gson.fromJson(reader, collectionType);
+                return gson.fromJson(reader, collectionType);
             }
-        } catch (FileNotFoundException e) {
+        } catch (Exception e) {
             Timber.e(e.getCause(), e.getMessage());
         } finally {
             if (reader != null) try { reader.close(); } catch (IOException e) { /* Do nothing */ }
         }
-        return pages;
+        return null;
     }
 
     // Shortcut for the method above

app/src/main/java/eu/kanade/tachiyomi/data/download/DownloadService.java

@@ -8,14 +8,16 @@ import android.os.PowerManager;
 
 import com.github.pwittchen.reactivenetwork.library.ReactiveNetwork;
 
+import org.greenrobot.eventbus.EventBus;
+import org.greenrobot.eventbus.Subscribe;
+import org.greenrobot.eventbus.ThreadMode;
+
 import javax.inject.Inject;
 
-import de.greenrobot.event.EventBus;
 import eu.kanade.tachiyomi.App;
 import eu.kanade.tachiyomi.R;
 import eu.kanade.tachiyomi.data.preference.PreferencesHelper;
 import eu.kanade.tachiyomi.event.DownloadChaptersEvent;
-import eu.kanade.tachiyomi.util.EventBusHook;
 import eu.kanade.tachiyomi.util.ToastUtil;
 import rx.Subscription;
 import rx.android.schedulers.AndroidSchedulers;
@@ -47,7 +49,7 @@ public class DownloadService extends Service {
         createWakeLock();
 
         listenQueueRunningChanges();
-        EventBus.getDefault().registerSticky(this);
+        EventBus.getDefault().register(this);
         listenNetworkChanges();
     }
 
@@ -71,7 +73,7 @@ public class DownloadService extends Service {
         return null;
     }
 
-    @EventBusHook
+    @Subscribe(sticky = true, threadMode = ThreadMode.MAIN)
     public void onEvent(DownloadChaptersEvent event) {
         EventBus.getDefault().removeStickyEvent(event);
         downloadManager.onDownloadChaptersEvent(event);

app/src/main/java/eu/kanade/tachiyomi/data/download/model/DownloadQueue.java

@@ -43,11 +43,11 @@ public class DownloadQueue extends ArrayList<Download> {
     }
 
     public Observable<Download> getStatusObservable() {
-        return statusSubject;
+        return statusSubject.onBackpressureBuffer();
     }
 
     public Observable<Download> getProgressObservable() {
-        return statusSubject
+        return statusSubject.onBackpressureBuffer()
                 .startWith(getActiveDownloads())
                 .flatMap(download -> {
                     if (download.getStatus() == Download.DOWNLOADING) {

app/src/main/java/eu/kanade/tachiyomi/data/io/IOHandler.java

@@ -0,0 +1,110 @@
+package eu.kanade.tachiyomi.data.io;
+
+import android.content.ContentResolver;
+import android.content.Context;
+import android.database.Cursor;
+import android.net.Uri;
+import android.os.Build;
+import android.os.ParcelFileDescriptor;
+import android.provider.DocumentsContract;
+import android.provider.MediaStore;
+
+import java.io.File;
+import java.io.FileDescriptor;
+import java.io.FileInputStream;
+import java.io.FileOutputStream;
+import java.io.IOException;
+
+public class IOHandler {
+    /**
+     * Get full filepath of build in Android File picker.
+     * If Google Drive (or other Cloud service) throw exception and download before loading
+     */
+    public static String getFilePath(Uri uri, ContentResolver resolver, Context context) {
+        try {
+            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {
+                String filePath = "";
+                String wholeID = DocumentsContract.getDocumentId(uri);
+
+                //Ugly work around. In sdk version Kitkat or higher external getDocumentId request will have no content://
+                if (wholeID.split(":").length == 1)
+                    throw new IllegalArgumentException();
+
+                // Split at colon, use second item in the array
+                String id = wholeID.split(":")[1];
+
+                String[] column = {MediaStore.Images.Media.DATA};
+
+                // where id is equal to
+                String sel = MediaStore.Images.Media._ID + "=?";
+
+                Cursor cursor = context.getContentResolver().query(MediaStore.Images.Media.EXTERNAL_CONTENT_URI,
+                        column, sel, new String[]{id}, null);
+
+                int columnIndex = cursor != null ? cursor.getColumnIndex(column[0]) : 0;
+
+                if (cursor != null ? cursor.moveToFirst() : false) {
+                    filePath = cursor.getString(columnIndex);
+                }
+                cursor.close();
+                return filePath;
+            } else {
+                String[] fields = {MediaStore.Images.Media.DATA};
+
+                Cursor cursor = resolver.query(uri, fields, null, null, null);
+
+                if (cursor == null)
+                    return null;
+
+                cursor.moveToFirst();
+                String path = cursor.getString(cursor.getColumnIndex(MediaStore.Images.Media.DATA));
+                cursor.close();
+
+                return path;
+            }
+        } catch (IllegalArgumentException e) {
+            //This exception is thrown when Google Drive. Try to download file
+            return downloadMediaAndReturnPath(uri, resolver, context);
+        }
+    }
+
+    private static String getTempFilename(Context context) throws IOException {
+        File outputDir = context.getCacheDir();
+        File outputFile = File.createTempFile("temp_cover", "0", outputDir);
+        return outputFile.getAbsolutePath();
+    }
+
+    private static String downloadMediaAndReturnPath(Uri uri, ContentResolver resolver, Context context) {
+        if (uri == null) return null;
+        FileInputStream input = null;
+        FileOutputStream output = null;
+        try {
+            ParcelFileDescriptor pfd = resolver.openFileDescriptor(uri, "r");
+            FileDescriptor fd = pfd != null ? pfd.getFileDescriptor() : null;
+            input = new FileInputStream(fd);
+
+            String tempFilename = getTempFilename(context);
+            output = new FileOutputStream(tempFilename);
+
+            int read;
+            byte[] bytes = new byte[4096];
+            while ((read = input.read(bytes)) != -1) {
+                output.write(bytes, 0, read);
+            }
+            return tempFilename;
+        } catch (IOException ignored) {
+        } finally {
+            if (input != null) try {
+                input.close();
+            } catch (Exception ignored) {
+            }
+            if (output != null) try {
+                output.close();
+            } catch (Exception ignored) {
+            }
+        }
+        return null;
+
+    }
+
+}

app/src/main/java/eu/kanade/tachiyomi/data/mangasync/base/MangaSyncService.java

@@ -1,8 +1,7 @@
 package eu.kanade.tachiyomi.data.mangasync.base;
 
-import com.squareup.okhttp.Response;
-
 import eu.kanade.tachiyomi.data.database.models.MangaSync;
+import okhttp3.Response;
 import rx.Observable;
 
 public abstract class MangaSyncService {

app/src/main/java/eu/kanade/tachiyomi/data/mangasync/services/MyAnimeList.java

@@ -4,12 +4,6 @@ import android.content.Context;
 import android.net.Uri;
 import android.util.Xml;
 
-import com.squareup.okhttp.Credentials;
-import com.squareup.okhttp.FormEncodingBuilder;
-import com.squareup.okhttp.Headers;
-import com.squareup.okhttp.RequestBody;
-import com.squareup.okhttp.Response;
-
 import org.jsoup.Jsoup;
 import org.xmlpull.v1.XmlSerializer;
 
@@ -26,6 +20,11 @@ import eu.kanade.tachiyomi.data.mangasync.MangaSyncManager;
 import eu.kanade.tachiyomi.data.mangasync.base.MangaSyncService;
 import eu.kanade.tachiyomi.data.network.NetworkHelper;
 import eu.kanade.tachiyomi.data.preference.PreferencesHelper;
+import okhttp3.Credentials;
+import okhttp3.FormBody;
+import okhttp3.Headers;
+import okhttp3.RequestBody;
+import okhttp3.Response;
 import rx.Observable;
 
 public class MyAnimeList extends MangaSyncService {
@@ -84,7 +83,7 @@ public class MyAnimeList extends MangaSyncService {
 
     public Observable<Boolean> login(String username, String password) {
         createHeaders(username, password);
-        return networkService.getResponse(getLoginUrl(), headers, null)
+        return networkService.getResponse(getLoginUrl(), headers, false)
                 .map(response -> response.code() == 200);
     }
 
@@ -102,7 +101,7 @@ public class MyAnimeList extends MangaSyncService {
     }
 
     public Observable<List<MangaSync>> search(String query) {
-        return networkService.getStringResponse(getSearchUrl(query), headers, null)
+        return networkService.getStringResponse(getSearchUrl(query), headers, true)
                 .map(Jsoup::parse)
                 .flatMap(doc -> Observable.from(doc.select("entry")))
                 .filter(entry -> !entry.select("type").text().equals("Novel"))
@@ -127,7 +126,7 @@ public class MyAnimeList extends MangaSyncService {
 
     public Observable<List<MangaSync>> getList() {
         // TODO cache this list for a few minutes
-        return networkService.getStringResponse(getListUrl(username), headers, null)
+        return networkService.getStringResponse(getListUrl(username), headers, true)
                 .map(Jsoup::parse)
                 .flatMap(doc -> Observable.from(doc.select("manga")))
                 .map(entry -> {
@@ -209,7 +208,7 @@ public class MyAnimeList extends MangaSyncService {
         xml.endTag("", ENTRY_TAG);
         xml.endDocument();
 
-        FormEncodingBuilder form = new FormEncodingBuilder();
+        FormBody.Builder form = new FormBody.Builder();
         form.add("data", writer.toString());
         return form.build();
     }

app/src/main/java/eu/kanade/tachiyomi/data/network/NetworkHelper.java

@@ -1,46 +1,78 @@
 package eu.kanade.tachiyomi.data.network;
 
 
-import com.squareup.okhttp.CacheControl;
+import android.content.Context;
-import com.squareup.okhttp.FormEncodingBuilder;
-import com.squareup.okhttp.Headers;
-import com.squareup.okhttp.OkHttpClient;
-import com.squareup.okhttp.Request;
-import com.squareup.okhttp.RequestBody;
-import com.squareup.okhttp.Response;
 
+import java.io.File;
 import java.net.CookieManager;
 import java.net.CookiePolicy;
 import java.net.CookieStore;
+import java.util.concurrent.TimeUnit;
 
+import okhttp3.Cache;
+import okhttp3.CacheControl;
+import okhttp3.FormBody;
+import okhttp3.Headers;
+import okhttp3.Interceptor;
+import okhttp3.JavaNetCookieJar;
+import okhttp3.OkHttpClient;
+import okhttp3.Request;
+import okhttp3.RequestBody;
+import okhttp3.Response;
 import rx.Observable;
 
 public final class NetworkHelper {
 
     private OkHttpClient client;
+    private OkHttpClient forceCacheClient;
+
     private CookieManager cookieManager;
 
-    public final CacheControl NULL_CACHE_CONTROL = new CacheControl.Builder().noCache().build();
     public final Headers NULL_HEADERS = new Headers.Builder().build();
-    public final RequestBody NULL_REQUEST_BODY = new FormEncodingBuilder().build();
+    public final RequestBody NULL_REQUEST_BODY = new FormBody.Builder().build();
+    public final CacheControl CACHE_CONTROL = new CacheControl.Builder()
+            .maxAge(10, TimeUnit.MINUTES)
+            .build();
+
+    private static final Interceptor REWRITE_CACHE_CONTROL_INTERCEPTOR = chain -> {
+        Response originalResponse = chain.proceed(chain.request());
+        return originalResponse.newBuilder()
+                .removeHeader("Pragma")
+                .header("Cache-Control", "max-age=" + 600)
+                .build();
+    };
+
+    private static final int CACHE_SIZE = 5 * 1024 * 1024; // 5 MiB
+    private static final String CACHE_DIR_NAME = "network_cache";
+
+    public NetworkHelper(Context context) {
+        File cacheDir = new File(context.getCacheDir(), CACHE_DIR_NAME);
 
-    public NetworkHelper() {
-        client = new OkHttpClient();
         cookieManager = new CookieManager();
         cookieManager.setCookiePolicy(CookiePolicy.ACCEPT_ALL);
-        client.setCookieHandler(cookieManager);
+
+        client = new OkHttpClient.Builder()
+                .cookieJar(new JavaNetCookieJar(cookieManager))
+                .cache(new Cache(cacheDir, CACHE_SIZE))
+                .build();
+
+        forceCacheClient = client.newBuilder()
+                .addNetworkInterceptor(REWRITE_CACHE_CONTROL_INTERCEPTOR)
+                .build();
     }
 
-    public Observable<Response> getResponse(final String url, final Headers headers, final CacheControl cacheControl) {
+    public Observable<Response> getResponse(final String url, final Headers headers, boolean forceCache) {
         return Observable.defer(() -> {
             try {
+                OkHttpClient c = forceCache ? forceCacheClient : client;
+
                 Request request = new Request.Builder()
                         .url(url)
-                        .cacheControl(cacheControl != null ? cacheControl : NULL_CACHE_CONTROL)
                         .headers(headers != null ? headers : NULL_HEADERS)
+                        .cacheControl(CACHE_CONTROL)
                         .build();
 
-                return Observable.just(client.newCall(request).execute());
+                return Observable.just(c.newCall(request).execute());
             } catch (Throwable e) {
                 return Observable.error(e);
             }
@@ -57,8 +89,8 @@ public final class NetworkHelper {
         });
     }
 
-    public Observable<String> getStringResponse(final String url, final Headers headers, final CacheControl cacheControl) {
+    public Observable<String> getStringResponse(final String url, final Headers headers, boolean forceCache) {
-        return getResponse(url, headers, cacheControl)
+        return getResponse(url, headers, forceCache)
                 .flatMap(this::mapResponseToString);
     }
 
@@ -82,23 +114,24 @@ public final class NetworkHelper {
             try {
                 Request request = new Request.Builder()
                         .url(url)
-                        .cacheControl(NULL_CACHE_CONTROL)
+                        .cacheControl(CacheControl.FORCE_NETWORK)
                         .headers(headers != null ? headers : NULL_HEADERS)
                         .build();
 
-                OkHttpClient progressClient = client.clone();
+                OkHttpClient progressClient = client.newBuilder()
+                        .cache(null)
+                        .addNetworkInterceptor(chain -> {
+                            Response originalResponse = chain.proceed(chain.request());
+                            return originalResponse.newBuilder()
+                                    .body(new ProgressResponseBody(originalResponse.body(), listener))
+                                    .build();
+                        }).build();
 
-                progressClient.networkInterceptors().add(chain -> {
-                    Response originalResponse = chain.proceed(chain.request());
-                    return originalResponse.newBuilder()
-                            .body(new ProgressResponseBody(originalResponse.body(), listener))
-                            .build();
-                });
                 return Observable.just(progressClient.newCall(request).execute());
             } catch (Throwable e) {
                 return Observable.error(e);
             }
-        }).retry(2);
+        }).retry(1);
     }
 
     public CookieStore getCookies() {

app/src/main/java/eu/kanade/tachiyomi/data/network/ProgressResponseBody.java

@@ -1,10 +1,9 @@
 package eu.kanade.tachiyomi.data.network;
 
-import com.squareup.okhttp.MediaType;
-import com.squareup.okhttp.ResponseBody;
-
 import java.io.IOException;
 
+import okhttp3.MediaType;
+import okhttp3.ResponseBody;
 import okio.Buffer;
 import okio.BufferedSource;
 import okio.ForwardingSource;
@@ -26,11 +25,11 @@ public class ProgressResponseBody extends ResponseBody {
         return responseBody.contentType();
     }
 
-    @Override public long contentLength() throws IOException {
+    @Override public long contentLength() {
         return responseBody.contentLength();
     }
 
-    @Override public BufferedSource source() throws IOException {
+    @Override public BufferedSource source() {
         if (bufferedSource == null) {
             bufferedSource = Okio.buffer(source(responseBody.source()));
         }
@@ -40,6 +39,7 @@ public class ProgressResponseBody extends ResponseBody {
     private Source source(Source source) {
         return new ForwardingSource(source) {
             long totalBytesRead = 0L;
+
             @Override public long read(Buffer sink, long byteCount) throws IOException {
                 long bytesRead = super.read(sink, byteCount);
                 // read() returns the number of bytes read, or -1 if this source is exhausted.

app/src/main/java/eu/kanade/tachiyomi/data/preference/PreferencesHelper.java

@@ -42,10 +42,12 @@ public class PreferencesHelper {
         if (getDownloadsDirectory().equals(defaultDownloadsDir.getAbsolutePath()) &&
                 !defaultDownloadsDir.exists()) {
             defaultDownloadsDir.mkdirs();
-            try {
-                new File(defaultDownloadsDir, ".nomedia").createNewFile();
-            } catch (IOException e) { /* Ignore */ }
         }
+
+        // Don't display downloaded chapters in gallery apps creating a ".nomedia" file
+        try {
+            new File(getDownloadsDirectory(), ".nomedia").createNewFile();
+        } catch (IOException e) { /* Ignore */ }
     }
 
     private String getKey(int keyResource) {
@@ -56,8 +58,8 @@ public class PreferencesHelper {
         prefs.edit().clear().apply();
     }
 
-    public Preference<Boolean> lockOrientation() {
+    public Preference<Integer> rotation() {
-        return rxPrefs.getBoolean(getKey(R.string.pref_lock_orientation_key), true);
+        return rxPrefs.getInteger(getKey(R.string.pref_rotation_type_key), 1);
     }
 
     public Preference<Boolean> enableTransitions() {
@@ -88,6 +90,22 @@ public class PreferencesHelper {
         return prefs.getInt(getKey(R.string.pref_default_viewer_key), 1);
     }
 
+    public Preference<Integer> imageScaleType() {
+        return rxPrefs.getInteger(getKey(R.string.pref_image_scale_type_key), 1);
+    }
+
+    public Preference<Integer> imageDecoder() {
+        return rxPrefs.getInteger(getKey(R.string.pref_image_decoder_key), 0);
+    }
+
+    public Preference<Integer> zoomStart() {
+        return rxPrefs.getInteger(getKey(R.string.pref_zoom_start_key), 1);
+    }
+
+    public Preference<Integer> readerTheme() {
+        return rxPrefs.getInteger(getKey(R.string.pref_reader_theme_key), 0);
+    }
+
     public Preference<Integer> portraitColumns() {
         return rxPrefs.getInteger(getKey(R.string.pref_library_columns_portrait_key), 0);
     }
@@ -108,12 +126,16 @@ public class PreferencesHelper {
         return prefs.getBoolean(getKey(R.string.pref_ask_update_manga_sync_key), false);
     }
 
-    public Preference<Integer> imageDecoder() {
+    public Preference<Integer> lastUsedCatalogueSource() {
-        return rxPrefs.getInteger(getKey(R.string.pref_image_decoder_key), 0);
+        return rxPrefs.getInteger(getKey(R.string.pref_last_catalogue_source_key), -1);
     }
 
-    public Preference<Integer> readerTheme() {
+    public boolean seamlessMode() {
-        return rxPrefs.getInteger(getKey(R.string.pref_reader_theme_key), 0);
+        return prefs.getBoolean(getKey(R.string.pref_seamless_mode_key), true);
+    }
+
+    public Preference<Boolean> catalogueAsList() {
+        return rxPrefs.getBoolean(getKey(R.string.pref_display_catalogue_as_list), false);
     }
 
     public String getSourceUsername(Source source) {
@@ -155,8 +177,8 @@ public class PreferencesHelper {
         prefs.edit().putString(getKey(R.string.pref_download_directory_key), path).apply();
     }
 
-    public int downloadThreads() {
+    public Preference<Integer> downloadThreads() {
-        return prefs.getInt(getKey(R.string.pref_download_slots_key), 1);
+        return rxPrefs.getInteger(getKey(R.string.pref_download_slots_key), 1);
     }
 
     public boolean downloadOnlyOverWifi() {

app/src/main/java/eu/kanade/tachiyomi/data/rest/GithubService.java

@@ -0,0 +1,15 @@
+package eu.kanade.tachiyomi.data.rest;
+
+import retrofit.http.GET;
+import rx.Observable;
+
+
+/**
+ * Used to connect with the Github API
+ */
+public interface GithubService {
+    String SERVICE_ENDPOINT = "https://api.github.com";
+
+    @GET("/repos/inorichi/tachiyomi/releases/latest") Observable<Release> getLatestVersion();
+
+}

app/src/main/java/eu/kanade/tachiyomi/data/rest/Release.java

@@ -0,0 +1,93 @@
+package eu.kanade.tachiyomi.data.rest;
+
+import com.google.gson.annotations.SerializedName;
+
+import java.util.List;
+
+/**
+ * Release object
+ * Contains information about the latest release
+ */
+public class Release {
+    /**
+     * Version name V0.0.0
+     */
+    @SerializedName("tag_name")
+    private final String version;
+
+    /** Change Log */
+    @SerializedName("body")
+    private final String log;
+
+    /** Assets containing download url */
+    @SerializedName("assets")
+    private final List<Assets> assets;
+
+    /**
+     * Release constructor
+     *
+     * @param version version of latest release
+     * @param log     log of latest release
+     * @param assets  assets of latest release
+     */
+    public Release(String version, String log, List<Assets> assets) {
+        this.version = version;
+        this.log = log;
+        this.assets = assets;
+    }
+
+    /**
+     * Get latest release version
+     *
+     * @return latest release version
+     */
+    public String getVersion() {
+        return version;
+    }
+
+    /**
+     * Get change log of latest release
+     *
+     * @return change log of latest release
+     */
+    public String getChangeLog() {
+        return log;
+    }
+
+    /**
+     * Get download link of latest release
+     *
+     * @return download link of latest release
+     */
+    public String getDownloadLink() {
+        return assets.get(0).getDownloadLink();
+    }
+
+    /**
+     * Assets class containing download url
+     */
+    class Assets {
+        @SerializedName("browser_download_url")
+        private final String download_url;
+
+
+        /**
+         * Assets Constructor
+         *
+         * @param download_url download url
+         */
+        @SuppressWarnings("unused") public Assets(String download_url) {
+            this.download_url = download_url;
+        }
+
+        /**
+         * Get download link of latest release
+         *
+         * @return download link of latest release
+         */
+        public String getDownloadLink() {
+            return download_url;
+        }
+    }
+}
+

app/src/main/java/eu/kanade/tachiyomi/data/rest/ServiceFactory.java

@@ -0,0 +1,21 @@
+package eu.kanade.tachiyomi.data.rest;
+
+import retrofit.RestAdapter;
+
+public class ServiceFactory {
+
+    /**
+     * Creates a retrofit service from an arbitrary class (clazz)
+     *
+     * @param clazz    Java interface of the retrofit service
+     * @param endPoint REST endpoint url
+     * @return retrofit service with defined endpoint
+     */
+    public static <T> T createRetrofitService(final Class<T> clazz, final String endPoint) {
+        final RestAdapter restAdapter = new RestAdapter.Builder()
+                .setEndpoint(endPoint)
+                .build();
+
+        return restAdapter.create(clazz);
+    }
+}

app/src/main/java/eu/kanade/tachiyomi/data/source/base/BaseSource.java

@@ -1,8 +1,5 @@
 package eu.kanade.tachiyomi.data.source.base;
 
-import com.squareup.okhttp.Headers;
-import com.squareup.okhttp.Response;
-
 import org.jsoup.nodes.Document;
 
 import java.util.List;
@@ -10,6 +7,8 @@ import java.util.List;
 import eu.kanade.tachiyomi.data.database.models.Chapter;
 import eu.kanade.tachiyomi.data.database.models.Manga;
 import eu.kanade.tachiyomi.data.source.model.MangasPage;
+import okhttp3.Headers;
+import okhttp3.Response;
 import rx.Observable;
 
 public abstract class BaseSource {

app/src/main/java/eu/kanade/tachiyomi/data/source/base/Source.java

@@ -3,8 +3,6 @@ package eu.kanade.tachiyomi.data.source.base;
 import android.content.Context;
 
 import com.bumptech.glide.load.model.LazyHeaders;
-import com.squareup.okhttp.Headers;
-import com.squareup.okhttp.Response;
 
 import org.jsoup.Jsoup;
 
@@ -23,6 +21,8 @@ import eu.kanade.tachiyomi.data.network.NetworkHelper;
 import eu.kanade.tachiyomi.data.preference.PreferencesHelper;
 import eu.kanade.tachiyomi.data.source.model.MangasPage;
 import eu.kanade.tachiyomi.data.source.model.Page;
+import okhttp3.Headers;
+import okhttp3.Response;
 import rx.Observable;
 import rx.schedulers.Schedulers;
 
@@ -53,7 +53,7 @@ public abstract class Source extends BaseSource {
             page.url = getInitialPopularMangasUrl();
 
         return networkService
-                .getStringResponse(page.url, requestHeaders, null)
+                .getStringResponse(page.url, requestHeaders, true)
                 .map(Jsoup::parse)
                 .doOnNext(doc -> page.mangas = parsePopularMangasFromHtml(doc))
                 .doOnNext(doc -> page.nextPageUrl = parseNextPopularMangasUrl(doc, page))
@@ -66,7 +66,7 @@ public abstract class Source extends BaseSource {
             page.url = getInitialSearchUrl(query);
 
         return networkService
-                .getStringResponse(page.url, requestHeaders, null)
+                .getStringResponse(page.url, requestHeaders, true)
                 .map(Jsoup::parse)
                 .doOnNext(doc -> page.mangas = parseSearchFromHtml(doc))
                 .doOnNext(doc -> page.nextPageUrl = parseNextSearchUrl(doc, page, query))
@@ -76,14 +76,14 @@ public abstract class Source extends BaseSource {
     // Get manga details from the source
     public Observable<Manga> pullMangaFromNetwork(final String mangaUrl) {
         return networkService
-                .getStringResponse(getBaseUrl() + overrideMangaUrl(mangaUrl), requestHeaders, null)
+                .getStringResponse(getBaseUrl() + overrideMangaUrl(mangaUrl), requestHeaders, true)
                 .flatMap(unparsedHtml -> Observable.just(parseHtmlToManga(mangaUrl, unparsedHtml)));
     }
 
     // Get chapter list of a manga from the source
     public Observable<List<Chapter>> pullChaptersFromNetwork(final String mangaUrl) {
         return networkService
-                .getStringResponse(getBaseUrl() + mangaUrl, requestHeaders, null)
+                .getStringResponse(getBaseUrl() + mangaUrl, requestHeaders, false)
                 .flatMap(unparsedHtml -> {
                     List<Chapter> chapters = parseHtmlToChapters(unparsedHtml);
                     return !chapters.isEmpty() ?
@@ -93,7 +93,7 @@ public abstract class Source extends BaseSource {
     }
 
     public Observable<List<Page>> getCachedPageListOrPullFromNetwork(final String chapterUrl) {
-        return chapterCache.getPageUrlsFromDiskCache(getChapterCacheKey(chapterUrl))
+        return chapterCache.getPageListFromCache(getChapterCacheKey(chapterUrl))
                 .onErrorResumeNext(throwable -> {
                     return pullPageListFromNetwork(chapterUrl);
                 })
@@ -102,7 +102,7 @@ public abstract class Source extends BaseSource {
 
     public Observable<List<Page>> pullPageListFromNetwork(final String chapterUrl) {
         return networkService
-                .getStringResponse(getBaseUrl() + overrideChapterUrl(chapterUrl), requestHeaders, null)
+                .getStringResponse(getBaseUrl() + overrideChapterUrl(chapterUrl), requestHeaders, false)
                 .flatMap(unparsedHtml -> {
                     List<Page> pages = convertToPages(parseHtmlToPageUrls(unparsedHtml));
                     return !pages.isEmpty() ?
@@ -127,7 +127,7 @@ public abstract class Source extends BaseSource {
     public Observable<Page> getImageUrlFromPage(final Page page) {
         page.setStatus(Page.LOAD_PAGE);
         return networkService
-                .getStringResponse(overridePageUrl(page.getUrl()), requestHeaders, null)
+                .getStringResponse(overridePageUrl(page.getUrl()), requestHeaders, false)
                 .flatMap(unparsedHtml -> Observable.just(parseHtmlToImageUrl(unparsedHtml)))
                 .onErrorResumeNext(e -> {
                     page.setStatus(Page.ERROR);
@@ -168,7 +168,7 @@ public abstract class Source extends BaseSource {
         return getImageProgressResponse(page)
                 .flatMap(resp -> {
                     try {
-                        chapterCache.putImageToDiskCache(page.getImageUrl(), resp);
+                        chapterCache.putImageToCache(page.getImageUrl(), resp);
                     } catch (IOException e) {
                         return Observable.error(e);
                     }
@@ -182,7 +182,7 @@ public abstract class Source extends BaseSource {
 
     public void savePageList(String chapterUrl, List<Page> pages) {
         if (pages != null)
-            chapterCache.putPageUrlsToDiskCache(getChapterCacheKey(chapterUrl), pages);
+            chapterCache.putPageListToCache(getChapterCacheKey(chapterUrl), pages);
     }
 
     protected List<Page> convertToPages(List<String> pageUrls) {

app/src/main/java/eu/kanade/tachiyomi/data/source/model/Page.java

@@ -1,5 +1,9 @@
 package eu.kanade.tachiyomi.data.source.model;
 
+import java.io.Serializable;
+import java.util.List;
+
+import eu.kanade.tachiyomi.data.database.models.Chapter;
 import eu.kanade.tachiyomi.data.network.ProgressListener;
 import rx.subjects.PublishSubject;
 
@@ -8,6 +12,7 @@ public class Page implements ProgressListener {
     private int pageNumber;
     private String url;
     private String imageUrl;
+    private transient Chapter chapter;
     private transient String imagePath;
     private transient volatile int status;
     private transient volatile int progress;
@@ -82,4 +87,16 @@ public class Page implements ProgressListener {
         this.statusSubject = subject;
     }
 
+    public Chapter getChapter() {
+        return chapter;
+    }
+
+    public void setChapter(Chapter chapter) {
+        this.chapter = chapter;
+    }
+
+    public boolean isLastPage() {
+        List<Page> chapterPages = chapter.getPages();
+        return chapterPages.size() -1 == pageNumber;
+    }
 }

app/src/main/java/eu/kanade/tachiyomi/data/source/online/english/Batoto.java

@@ -2,12 +2,9 @@ package eu.kanade.tachiyomi.data.source.online.english;
 
 import android.content.Context;
 import android.net.Uri;
+import android.text.Html;
 import android.text.TextUtils;
 
-import com.squareup.okhttp.FormEncodingBuilder;
-import com.squareup.okhttp.Headers;
-import com.squareup.okhttp.Response;
-
 import org.jsoup.Jsoup;
 import org.jsoup.nodes.Document;
 import org.jsoup.nodes.Element;
@@ -35,6 +32,9 @@ import eu.kanade.tachiyomi.data.source.base.LoginSource;
 import eu.kanade.tachiyomi.data.source.model.MangasPage;
 import eu.kanade.tachiyomi.data.source.model.Page;
 import eu.kanade.tachiyomi.util.Parser;
+import okhttp3.FormBody;
+import okhttp3.Headers;
+import okhttp3.Response;
 import rx.Observable;
 
 public class Batoto extends LoginSource {
@@ -48,6 +48,8 @@ public class Batoto extends LoginSource {
     public static final String MANGA_URL = "/comic_pop?id=%s";
     public static final String LOGIN_URL = BASE_URL + "/forums/index.php?app=core&module=global&section=login";
 
+    public static final Pattern staffNotice = Pattern.compile("=+Batoto Staff Notice=+([^=]+)==+", Pattern.CASE_INSENSITIVE);
+
     private Pattern datePattern;
     private Map<String, Integer> dateFields;
 
@@ -205,6 +207,12 @@ public class Batoto extends LoginSource {
 
     @Override
     protected List<Chapter> parseHtmlToChapters(String unparsedHtml) {
+        Matcher matcher = staffNotice.matcher(unparsedHtml);
+        if (matcher.find()) {
+            String notice = Html.fromHtml(matcher.group(1)).toString().trim();
+            throw new RuntimeException(notice);
+        }
+
         Document parsedDocument = Jsoup.parse(unparsedHtml);
 
         List<Chapter> chapterList = new ArrayList<>();
@@ -235,6 +243,7 @@ public class Batoto extends LoginSource {
         return chapter;
     }
 
+    @SuppressWarnings("WrongConstant")
     private long parseDateFromElement(Element dateElement) {
         String dateAsString = dateElement.text();
 
@@ -250,7 +259,6 @@ public class Batoto extends LoginSource {
                 String unit = m.group(2);
 
                 Calendar cal = Calendar.getInstance();
-                // Not an error
                 cal.add(dateFields.get(unit), -amount);
                 date = cal.getTime();
             } else {
@@ -310,7 +318,7 @@ public class Batoto extends LoginSource {
 
     @Override
     public Observable<Boolean> login(String username, String password) {
-        return networkService.getStringResponse(LOGIN_URL, requestHeaders, null)
+        return networkService.getStringResponse(LOGIN_URL, requestHeaders, false)
                 .flatMap(response -> doLogin(response, username, password))
                 .map(this::isAuthenticationSuccessful);
     }
@@ -320,7 +328,7 @@ public class Batoto extends LoginSource {
         Element form = doc.select("#login").first();
         String postUrl = form.attr("action");
 
-        FormEncodingBuilder formBody = new FormEncodingBuilder();
+        FormBody.Builder formBody = new FormBody.Builder();
         Element authKey = form.select("input[name=auth_key]").first();
 
         formBody.add(authKey.attr("name"), authKey.attr("value"));
@@ -354,8 +362,13 @@ public class Batoto extends LoginSource {
     @Override
     public Observable<List<Chapter>> pullChaptersFromNetwork(String mangaUrl) {
         Observable<List<Chapter>> observable;
-        if (!isLogged()) {
+        String username = prefs.getSourceUsername(this);
-            observable = login(prefs.getSourceUsername(this), prefs.getSourcePassword(this))
+        String password = prefs.getSourcePassword(this);
+        if (username.isEmpty() && password.isEmpty()) {
+            observable = Observable.error(new Exception("User not logged"));
+        }
+        else if (!isLogged()) {
+            observable = login(username, password)
                     .flatMap(result -> super.pullChaptersFromNetwork(mangaUrl));
         }
         else {

app/src/main/java/eu/kanade/tachiyomi/data/source/online/english/Kissmanga.java

@@ -3,10 +3,6 @@ package eu.kanade.tachiyomi.data.source.online.english;
 import android.content.Context;
 import android.net.Uri;
 
-import com.squareup.okhttp.FormEncodingBuilder;
-import com.squareup.okhttp.Headers;
-import com.squareup.okhttp.Response;
-
 import org.jsoup.Jsoup;
 import org.jsoup.nodes.Document;
 import org.jsoup.nodes.Element;
@@ -26,6 +22,9 @@ import eu.kanade.tachiyomi.data.source.base.Source;
 import eu.kanade.tachiyomi.data.source.model.MangasPage;
 import eu.kanade.tachiyomi.data.source.model.Page;
 import eu.kanade.tachiyomi.util.Parser;
+import okhttp3.FormBody;
+import okhttp3.Headers;
+import okhttp3.Response;
 import rx.Observable;
 
 public class Kissmanga extends Source {
@@ -109,7 +108,7 @@ public class Kissmanga extends Source {
         if (page.page == 1)
             page.url = getInitialSearchUrl(query);
 
-        FormEncodingBuilder form = new FormEncodingBuilder();
+        FormBody.Builder form = new FormBody.Builder();
         form.add("authorArtist", "");
         form.add("mangaName", query);
         form.add("status", "");

app/src/main/java/eu/kanade/tachiyomi/data/source/online/english/Mangafox.java

@@ -29,7 +29,7 @@ public class Mangafox extends Source {
     public static final String BASE_URL = "http://mangafox.me";
     public static final String POPULAR_MANGAS_URL = BASE_URL + "/directory/%s";
     public static final String SEARCH_URL =
-            BASE_URL + "/search.php?name_method=cw&advopts=1&order=az&sort=name&name=%s&page=%s";
+            BASE_URL + "/search.php?name_method=cw&advopts=1&order=za&sort=views&name=%s&page=%s";
 
     public Mangafox(Context context) {
         super(context);

app/src/main/java/eu/kanade/tachiyomi/data/source/online/english/Mangahere.java

@@ -28,7 +28,7 @@ public class Mangahere extends Source {
     public static final String NAME = "Mangahere (EN)";
     public static final String BASE_URL = "http://www.mangahere.co";
     public static final String POPULAR_MANGAS_URL = BASE_URL + "/directory/%s";
-    public static final String SEARCH_URL = BASE_URL + "/search.php?name=%s&page=%s";
+    public static final String SEARCH_URL = BASE_URL + "/search.php?name=%s&page=%s&sort=views&order=za";
 
     public Mangahere(Context context) {
         super(context);

app/src/main/java/eu/kanade/tachiyomi/data/sync/LibraryUpdateService.java

@@ -111,7 +111,7 @@ public class LibraryUpdateService extends Service {
                     .toList().toBlocking().single();
 
         return Observable.from(mangas)
-                .doOnNext(manga -> showNotification(
+                .doOnNext(manga -> showProgressNotification(
                         getString(R.string.notification_update_progress,
                                 count.incrementAndGet(), mangas.size()), manga.title))
                 .concatMap(manga -> updateManga(manga)
@@ -123,8 +123,14 @@ public class LibraryUpdateService extends Service {
                         .filter(pair -> pair.first > 0)
                         .map(pair -> new MangaUpdate(manga, pair.first)))
                 .doOnNext(updates::add)
-                .doOnCompleted(() -> showBigNotification(getString(R.string.notification_update_completed),
+                .doOnCompleted(() -> {
-                        getUpdatedMangas(updates, failedUpdates)));
+                    if (updates.isEmpty()) {
+                        cancelNotification();
+                    } else {
+                        showResultNotification(getString(R.string.notification_update_completed),
+                                getUpdatedMangasResult(updates, failedUpdates));
+                    }
+                });
     }
 
     private Observable<Pair<Integer, Integer>> updateManga(Manga manga) {
@@ -133,7 +139,7 @@ public class LibraryUpdateService extends Service {
                 .flatMap(chapters -> db.insertOrRemoveChapters(manga, chapters));
     }
 
-    private String getUpdatedMangas(List<MangaUpdate> updates, List<Manga> failedUpdates) {
+    private String getUpdatedMangasResult(List<MangaUpdate> updates, List<Manga> failedUpdates) {
         final StringBuilder result = new StringBuilder();
         if (updates.isEmpty()) {
             result.append(getString(R.string.notification_no_new_chapters)).append("\n");
@@ -185,7 +191,20 @@ public class LibraryUpdateService extends Service {
         notificationManager.notify(UPDATE_NOTIFICATION_ID, builder.build());
     }
 
-    private void showBigNotification(String title, String body) {
+    private void showProgressNotification(String title, String body) {
+        NotificationCompat.Builder builder = new NotificationCompat.Builder(this)
+                .setSmallIcon(R.drawable.ic_action_refresh)
+                .setContentTitle(title)
+                .setContentText(body)
+                .setOngoing(true);
+
+        NotificationManager notificationManager =
+                (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
+
+        notificationManager.notify(UPDATE_NOTIFICATION_ID, builder.build());
+    }
+
+    private void showResultNotification(String title, String body) {
         NotificationCompat.Builder builder = new NotificationCompat.Builder(this)
                 .setSmallIcon(R.drawable.ic_action_refresh)
                 .setContentTitle(title)
@@ -199,6 +218,13 @@ public class LibraryUpdateService extends Service {
         notificationManager.notify(UPDATE_NOTIFICATION_ID, builder.build());
     }
 
+    private void cancelNotification() {
+        NotificationManager notificationManager =
+                (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
+
+        notificationManager.cancel(UPDATE_NOTIFICATION_ID);
+    }
+
     private PendingIntent getNotificationIntent() {
         Intent intent = new Intent(this, MainActivity.class);
         intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP | Intent.FLAG_ACTIVITY_SINGLE_TOP);

app/src/main/java/eu/kanade/tachiyomi/data/updater/UpdateChecker.java

@@ -0,0 +1,31 @@
+package eu.kanade.tachiyomi.data.updater;
+
+
+import android.content.Context;
+
+import eu.kanade.tachiyomi.R;
+import eu.kanade.tachiyomi.data.rest.GithubService;
+import eu.kanade.tachiyomi.data.rest.Release;
+import eu.kanade.tachiyomi.data.rest.ServiceFactory;
+import eu.kanade.tachiyomi.util.ToastUtil;
+import rx.Observable;
+
+
+public class UpdateChecker {
+    private final Context context;
+
+    public UpdateChecker(Context context) {
+        this.context = context;
+    }
+
+    /**
+     * Returns observable containing release information
+     *
+     */
+    public Observable<Release> checkForApplicationUpdate() {
+        ToastUtil.showShort(context, context.getString(R.string.update_check_look_for_updates));
+        //Create Github service to retrieve Github data
+        GithubService service = ServiceFactory.createRetrofitService(GithubService.class, GithubService.SERVICE_ENDPOINT);
+        return service.getLatestVersion();
+    }
+}

app/src/main/java/eu/kanade/tachiyomi/data/updater/UpdateDownloader.java

@@ -0,0 +1,99 @@
+package eu.kanade.tachiyomi.data.updater;
+
+import android.content.Context;
+import android.content.Intent;
+import android.net.Uri;
+import android.os.AsyncTask;
+
+import java.io.File;
+import java.io.FileOutputStream;
+import java.io.InputStream;
+import java.net.HttpURLConnection;
+import java.net.URL;
+
+import javax.inject.Inject;
+
+import eu.kanade.tachiyomi.App;
+import eu.kanade.tachiyomi.data.preference.PreferencesHelper;
+
+public class UpdateDownloader extends AsyncTask<String, Void, Void> {
+    /**
+     * Name of cache directory.
+     */
+    private static final String PARAMETER_CACHE_DIRECTORY = "apk_downloads";
+    /**
+     * Interface to global information about an application environment.
+     */
+    private final Context context;
+    /**
+     * Cache directory used for cache management.
+     */
+    private final File cacheDir;
+    @Inject PreferencesHelper preferencesHelper;
+
+    /**
+     * Constructor of UpdaterCache.
+     *
+     * @param context application environment interface.
+     */
+    public UpdateDownloader(Context context) {
+        App.get(context).getComponent().inject(this);
+        this.context = context;
+
+        // Get cache directory from parameter.
+        cacheDir = new File(preferencesHelper.getDownloadsDirectory(), PARAMETER_CACHE_DIRECTORY);
+
+        // Create cache directory.
+        createCacheDir();
+    }
+
+    /**
+     * Create cache directory if it doesn't exist
+     *
+     * @return true if cache dir is created otherwise false.
+     */
+    @SuppressWarnings("UnusedReturnValue")
+    private boolean createCacheDir() {
+        return !cacheDir.exists() && cacheDir.mkdirs();
+    }
+
+
+    @Override
+    protected Void doInBackground(String... args) {
+        try {
+            createCacheDir();
+
+            URL url = new URL(args[0]);
+            HttpURLConnection c = (HttpURLConnection) url.openConnection();
+            c.connect();
+
+            File outputFile = new File(cacheDir, "update.apk");
+            if (outputFile.exists()) {
+                //noinspection ResultOfMethodCallIgnored
+                outputFile.delete();
+            }
+            FileOutputStream fos = new FileOutputStream(outputFile);
+
+            InputStream is = c.getInputStream();
+
+            byte[] buffer = new byte[1024];
+            int len1;
+            while ((len1 = is.read(buffer)) != -1) {
+                fos.write(buffer, 0, len1);
+            }
+            fos.close();
+            is.close();
+
+            // Prompt install interface
+            Intent intent = new Intent(Intent.ACTION_VIEW);
+            intent.setDataAndType(Uri.fromFile(outputFile), "application/vnd.android.package-archive");
+            intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK); // without this flag android returned a intent error!
+            context.startActivity(intent);
+
+        } catch (Exception e) {
+            e.printStackTrace();
+        }
+        return null;
+    }
+}
+

app/src/main/java/eu/kanade/tachiyomi/event/MangaEvent.java

@@ -0,0 +1,12 @@
+package eu.kanade.tachiyomi.event;
+
+import eu.kanade.tachiyomi.data.database.models.Manga;
+
+public class MangaEvent {
+
+    public final Manga manga;
+
+    public MangaEvent(Manga manga) {
+        this.manga = manga;
+    }
+}

app/src/main/java/eu/kanade/tachiyomi/injection/component/AppComponent.java

@@ -10,6 +10,7 @@ import eu.kanade.tachiyomi.data.mangasync.services.MyAnimeList;
 import eu.kanade.tachiyomi.data.source.base.Source;
 import eu.kanade.tachiyomi.data.sync.LibraryUpdateService;
 import eu.kanade.tachiyomi.data.sync.UpdateMangaSyncService;
+import eu.kanade.tachiyomi.data.updater.UpdateDownloader;
 import eu.kanade.tachiyomi.injection.module.AppModule;
 import eu.kanade.tachiyomi.injection.module.DataModule;
 import eu.kanade.tachiyomi.ui.catalogue.CataloguePresenter;
@@ -50,6 +51,7 @@ public interface AppComponent {
     void inject(ReaderActivity readerActivity);
     void inject(MangaActivity mangaActivity);
     void inject(SettingsAccountsFragment settingsAccountsFragment);
+
     void inject(SettingsActivity settingsActivity);
 
     void inject(Source source);
@@ -60,6 +62,7 @@ public interface AppComponent {
     void inject(DownloadService downloadService);
     void inject(UpdateMangaSyncService updateMangaSyncService);
 
+    void inject(UpdateDownloader updateDownloader);
     Application application();
 
 }

app/src/main/java/eu/kanade/tachiyomi/injection/module/DataModule.java

@@ -47,8 +47,8 @@ public class DataModule {
 
     @Provides
     @Singleton
-    NetworkHelper provideNetworkHelper() {
+    NetworkHelper provideNetworkHelper(Application app) {
-        return new NetworkHelper();
+        return new NetworkHelper(app);
     }
 
     @Provides

app/src/main/java/eu/kanade/tachiyomi/ui/base/activity/BaseActivity.java

@@ -5,7 +5,8 @@ import android.support.v7.app.AppCompatActivity;
 import android.support.v7.widget.Toolbar;
 import android.view.MenuItem;
 
-import de.greenrobot.event.EventBus;
+import org.greenrobot.eventbus.EventBus;
+
 import icepick.Icepick;
 
 public class BaseActivity extends AppCompatActivity {
@@ -58,20 +59,8 @@ public class BaseActivity extends AppCompatActivity {
         return super.onOptionsItemSelected(item);
     }
 
-    public void registerForStickyEvents() {
-        registerForStickyEvents(0);
-    }
-
-    public void registerForStickyEvents(int priority) {
-        EventBus.getDefault().registerSticky(this, priority);
-    }
-
     public void registerForEvents() {
-        registerForEvents(0);
+        EventBus.getDefault().register(this);
-    }
-
-    public void registerForEvents(int priority) {
-        EventBus.getDefault().register(this, priority);
     }
 
     public void unregisterForEvents() {

app/src/main/java/eu/kanade/tachiyomi/ui/base/fab/ScrollAwareFABBehavior.java

@@ -19,10 +19,19 @@ import android.content.Context;
 import android.support.design.widget.CoordinatorLayout;
 import android.support.design.widget.FloatingActionButton;
 import android.support.v4.view.ViewCompat;
+import android.support.v4.view.animation.FastOutSlowInInterpolator;
 import android.util.AttributeSet;
 import android.view.View;
+import android.view.animation.Animation;
+import android.view.animation.AnimationUtils;
+import android.view.animation.Interpolator;
+
+import eu.kanade.tachiyomi.R;
 
 public class ScrollAwareFABBehavior extends FloatingActionButton.Behavior {
+    private static final Interpolator INTERPOLATOR = new FastOutSlowInInterpolator();
+    private boolean mIsAnimatingOut = false;
+
     public ScrollAwareFABBehavior(Context context, AttributeSet attrs) {
         super();
     }
@@ -40,12 +49,43 @@ public class ScrollAwareFABBehavior extends FloatingActionButton.Behavior {
                                final View target, final int dxConsumed, final int dyConsumed,
                                final int dxUnconsumed, final int dyUnconsumed) {
         super.onNestedScroll(coordinatorLayout, child, target, dxConsumed, dyConsumed, dxUnconsumed, dyUnconsumed);
-        if (dyConsumed > 0 && child.getVisibility() == View.VISIBLE) {
+        if (dyConsumed > 0 && !this.mIsAnimatingOut && child.getVisibility() == View.VISIBLE) {
             // User scrolled down and the FAB is currently visible -> hide the FAB
-            child.hide();
+            animateOut(child);
         } else if (dyConsumed < 0 && child.getVisibility() != View.VISIBLE) {
             // User scrolled up and the FAB is currently not visible -> show the FAB
-            child.show();
+            animateIn(child);
         }
     }
-}
+
+    // Same animation that FloatingActionButton.Behavior uses to hide the FAB when the AppBarLayout exits
+    private void animateOut(final FloatingActionButton button) {
+            Animation anim = AnimationUtils.loadAnimation(button.getContext(), R.anim.fab_hide_to_bottom);
+            anim.setInterpolator(INTERPOLATOR);
+            anim.setDuration(200L);
+            anim.setAnimationListener(new Animation.AnimationListener() {
+                public void onAnimationStart(Animation animation) {
+                    ScrollAwareFABBehavior.this.mIsAnimatingOut = true;
+                }
+
+                public void onAnimationEnd(Animation animation) {
+                    ScrollAwareFABBehavior.this.mIsAnimatingOut = false;
+                    button.setVisibility(View.GONE);
+                }
+
+                @Override
+                public void onAnimationRepeat(final Animation animation) {
+                }
+            });
+            button.startAnimation(anim);
+    }
+
+    // Same animation that FloatingActionButton.Behavior uses to show the FAB when the AppBarLayout enters
+    private void animateIn(FloatingActionButton button) {
+        button.setVisibility(View.VISIBLE);
+            Animation anim = AnimationUtils.loadAnimation(button.getContext(), R.anim.fab_show_from_bottom);
+            anim.setDuration(200L);
+            anim.setInterpolator(INTERPOLATOR);
+            button.startAnimation(anim);
+    }
+}

app/src/main/java/eu/kanade/tachiyomi/ui/base/fragment/BaseFragment.java

@@ -3,7 +3,8 @@ package eu.kanade.tachiyomi.ui.base.fragment;
 import android.os.Bundle;
 import android.support.v4.app.Fragment;
 
-import de.greenrobot.event.EventBus;
+import org.greenrobot.eventbus.EventBus;
+
 import eu.kanade.tachiyomi.ui.base.activity.BaseActivity;
 import icepick.Icepick;
 
@@ -33,20 +34,8 @@ public class BaseFragment extends Fragment {
         return (BaseActivity) getActivity();
     }
 
-    public void registerForStickyEvents() {
-        registerForStickyEvents(0);
-    }
-
-    public void registerForStickyEvents(int priority) {
-        EventBus.getDefault().registerSticky(this, priority);
-    }
-
     public void registerForEvents() {
-        registerForEvents(0);
+        EventBus.getDefault().register(this);
-    }
-
-    public void registerForEvents(int priority) {
-        EventBus.getDefault().register(this, priority);
     }
 
     public void unregisterForEvents() {

app/src/main/java/eu/kanade/tachiyomi/ui/base/presenter/BasePresenter.java

@@ -4,7 +4,8 @@ import android.content.Context;
 import android.os.Bundle;
 import android.support.annotation.NonNull;
 
-import de.greenrobot.event.EventBus;
+import org.greenrobot.eventbus.EventBus;
+
 import icepick.Icepick;
 import nucleus.view.ViewWithPresenter;
 
@@ -24,10 +25,6 @@ public class BasePresenter<V extends ViewWithPresenter> extends RxPresenter<V> {
         Icepick.saveInstanceState(this, state);
     }
 
-    public void registerForStickyEvents() {
-        EventBus.getDefault().registerSticky(this);
-    }
-
     public void registerForEvents() {
         EventBus.getDefault().register(this);
     }

app/src/main/java/eu/kanade/tachiyomi/ui/base/presenter/RxPresenter.java

@@ -107,14 +107,14 @@ public class RxPresenter<View> extends Presenter<View> {
     }
 
     /**
-     * Checks if a restartable is subscribed.
+     * Checks if a restartable is unsubscribed.
      *
-     * @param restartableId id of a restartable.
+     * @param restartableId id of the restartable.
-     * @return True if the restartable is subscribed, false otherwise.
+     * @return true if the subscription is null or unsubscribed, false otherwise.
      */
-    public boolean isSubscribed(int restartableId) {
+    public boolean isUnsubscribed(int restartableId) {
-        Subscription s = restartableSubscriptions.get(restartableId);
+        Subscription subscription = restartableSubscriptions.get(restartableId);
-        return s != null && !s.isUnsubscribed();
+        return subscription == null || subscription.isUnsubscribed();
     }
 
     /**
@@ -213,6 +213,137 @@ public class RxPresenter<View> extends Presenter<View> {
         restartableReplay(restartableId, observableFactory, onNext, null);
     }
 
+    /**
+     * A startable behaves the same as a restartable but it does not resubscribe on process restart
+     *
+     * @param startableId       an id of the restartable.
+     * @param observableFactory a factory that should return an Observable when the startable should run.
+     */
+    public <T> void startable(int startableId, final Func0<Observable<T>> observableFactory) {
+        restartables.put(startableId, () -> observableFactory.call().subscribe());
+    }
+
+    /**
+     * A startable behaves the same as a restartable but it does not resubscribe on process restart
+     *
+     * @param startableId       an id of the restartable.
+     * @param observableFactory a factory that should return an Observable when the startable should run.
+     * @param onNext            a callback that will be called when received data should be delivered to view.
+     * @param onError           a callback that will be called if the source observable emits onError.
+     */
+    public <T> void startable(int startableId, final Func0<Observable<T>> observableFactory,
+        final Action1<T> onNext, final Action1<Throwable> onError) {
+
+        restartables.put(startableId, () -> observableFactory.call().subscribe(onNext, onError));
+    }
+
+    /**
+     * A startable behaves the same as a restartable but it does not resubscribe on process restart
+     *
+     * @param startableId       an id of the restartable.
+     * @param observableFactory a factory that should return an Observable when the startable should run.
+     * @param onNext            a callback that will be called when received data should be delivered to view.
+     */
+    public <T> void startable(int startableId, final Func0<Observable<T>> observableFactory, final Action1<T> onNext) {
+        restartables.put(startableId, () -> observableFactory.call().subscribe(onNext));
+    }
+    
+    /**
+     * This is a shortcut that can be used instead of combining together
+     * {@link #startable(int, Func0)},
+     * {@link #deliverFirst()},
+     * {@link #split(Action2, Action2)}.
+     *
+     * @param startableId       an id of the startable.
+     * @param observableFactory a factory that should return an Observable when the startable should run.
+     * @param onNext            a callback that will be called when received data should be delivered to view.
+     * @param onError           a callback that will be called if the source observable emits onError.
+     * @param <T>               the type of the observable.
+     */
+    public <T> void startableFirst(int startableId, final Func0<Observable<T>> observableFactory,
+        final Action2<View, T> onNext, @Nullable final Action2<View, Throwable> onError) {
+
+        restartables.put(startableId, new Func0<Subscription>() {
+            @Override
+            public Subscription call() {
+                return observableFactory.call()
+                        .compose(RxPresenter.this.<T>deliverFirst())
+                        .subscribe(split(onNext, onError));
+            }
+        });
+    }
+
+    /**
+     * This is a shortcut for calling {@link #startableFirst(int, Func0, Action2, Action2)} with the last parameter = null.
+     */
+    public <T> void startableFirst(int startableId, final Func0<Observable<T>> observableFactory, final Action2<View, T> onNext) {
+        startableFirst(startableId, observableFactory, onNext, null);
+    }
+
+    /**
+     * This is a shortcut that can be used instead of combining together
+     * {@link #startable(int, Func0)},
+     * {@link #deliverLatestCache()},
+     * {@link #split(Action2, Action2)}.
+     *
+     * @param startableId       an id of the startable.
+     * @param observableFactory a factory that should return an Observable when the startable should run.
+     * @param onNext            a callback that will be called when received data should be delivered to view.
+     * @param onError           a callback that will be called if the source observable emits onError.
+     * @param <T>               the type of the observable.
+     */
+    public <T> void startableLatestCache(int startableId, final Func0<Observable<T>> observableFactory,
+        final Action2<View, T> onNext, @Nullable final Action2<View, Throwable> onError) {
+
+        restartables.put(startableId, new Func0<Subscription>() {
+            @Override
+            public Subscription call() {
+                return observableFactory.call()
+                        .compose(RxPresenter.this.<T>deliverLatestCache())
+                        .subscribe(split(onNext, onError));
+            }
+        });
+    }
+
+    /**
+     * This is a shortcut for calling {@link #startableLatestCache(int, Func0, Action2, Action2)} with the last parameter = null.
+     */
+    public <T> void startableLatestCache(int startableId, final Func0<Observable<T>> observableFactory, final Action2<View, T> onNext) {
+        startableLatestCache(startableId, observableFactory, onNext, null);
+    }
+
+    /**
+     * This is a shortcut that can be used instead of combining together
+     * {@link #startable(int, Func0)},
+     * {@link #deliverReplay()},
+     * {@link #split(Action2, Action2)}.
+     *
+     * @param startableId       an id of the startable.
+     * @param observableFactory a factory that should return an Observable when the startable should run.
+     * @param onNext            a callback that will be called when received data should be delivered to view.
+     * @param onError           a callback that will be called if the source observable emits onError.
+     * @param <T>               the type of the observable.
+     */
+    public <T> void startableReplay(int startableId, final Func0<Observable<T>> observableFactory,
+        final Action2<View, T> onNext, @Nullable final Action2<View, Throwable> onError) {
+
+        restartables.put(startableId, new Func0<Subscription>() {
+            @Override
+            public Subscription call() {
+                return observableFactory.call()
+                        .compose(RxPresenter.this.<T>deliverReplay())
+                        .subscribe(split(onNext, onError));
+            }
+        });
+    }
+
+    /**
+     * This is a shortcut for calling {@link #startableReplay(int, Func0, Action2, Action2)} with the last parameter = null.
+     */
+    public <T> void startableReplay(int startableId, final Func0<Observable<T>> observableFactory, final Action2<View, T> onNext) {
+        startableReplay(startableId, observableFactory, onNext, null);
+    }
+
     /**
      * Returns an {@link rx.Observable.Transformer} that couples views with data that has been emitted by
      * the source {@link rx.Observable}.

app/src/main/java/eu/kanade/tachiyomi/ui/catalogue/CatalogueAdapter.java

@@ -31,6 +31,10 @@ public class CatalogueAdapter extends FlexibleAdapter<CatalogueHolder, Manga> {
         notifyDataSetChanged();
     }
 
+    public List<Manga> getItems() {
+        return mItems;
+    }
+
     @Override
     public long getItemId(int position) {
         return mItems.get(position).id;
@@ -44,8 +48,13 @@ public class CatalogueAdapter extends FlexibleAdapter<CatalogueHolder, Manga> {
     @Override
     public CatalogueHolder onCreateViewHolder(ViewGroup parent, int viewType) {
         LayoutInflater inflater = fragment.getActivity().getLayoutInflater();
-        View v = inflater.inflate(R.layout.item_catalogue, parent, false);
+        if (parent.getId() == R.id.catalogue_grid) {
-        return new CatalogueHolder(v, this, fragment);
+            View v = inflater.inflate(R.layout.item_catalogue_grid, parent, false);
+            return new CatalogueGridHolder(v, this, fragment);
+        } else {
+            View v = inflater.inflate(R.layout.item_catalogue_list, parent, false);
+            return new CatalogueListHolder(v, this, fragment);
+        }
     }
 
     @Override

app/src/main/java/eu/kanade/tachiyomi/ui/catalogue/CatalogueFragment.java

@@ -4,7 +4,10 @@ import android.content.Context;
 import android.content.Intent;
 import android.os.Bundle;
 import android.support.annotation.Nullable;
+import android.support.v4.content.ContextCompat;
 import android.support.v7.widget.GridLayoutManager;
+import android.support.v7.widget.LinearLayoutManager;
+import android.support.v7.widget.RecyclerView;
 import android.support.v7.widget.SearchView;
 import android.support.v7.widget.Toolbar;
 import android.text.TextUtils;
@@ -14,9 +17,13 @@ import android.view.MenuInflater;
 import android.view.MenuItem;
 import android.view.View;
 import android.view.ViewGroup;
+import android.view.animation.Animation;
+import android.view.animation.AnimationUtils;
 import android.widget.AdapterView;
+import android.widget.ArrayAdapter;
 import android.widget.ProgressBar;
 import android.widget.Spinner;
+import android.widget.ViewSwitcher;
 
 import com.afollestad.materialdialogs.MaterialDialog;
 
@@ -30,11 +37,13 @@ import eu.kanade.tachiyomi.data.database.models.Manga;
 import eu.kanade.tachiyomi.data.source.base.Source;
 import eu.kanade.tachiyomi.ui.base.adapter.FlexibleViewHolder;
 import eu.kanade.tachiyomi.ui.base.fragment.BaseRxFragment;
+import eu.kanade.tachiyomi.ui.decoration.DividerItemDecoration;
 import eu.kanade.tachiyomi.ui.main.MainActivity;
 import eu.kanade.tachiyomi.ui.manga.MangaActivity;
 import eu.kanade.tachiyomi.util.ToastUtil;
 import eu.kanade.tachiyomi.widget.AutofitRecyclerView;
-import eu.kanade.tachiyomi.widget.EndlessRecyclerScrollListener;
+import eu.kanade.tachiyomi.widget.EndlessGridScrollListener;
+import eu.kanade.tachiyomi.widget.EndlessListScrollListener;
 import icepick.State;
 import nucleus.factory.RequiresPresenter;
 import rx.Subscription;
@@ -45,22 +54,28 @@ import rx.subjects.PublishSubject;
 public class CatalogueFragment extends BaseRxFragment<CataloguePresenter>
         implements FlexibleViewHolder.OnListItemClickListener {
 
-    @Bind(R.id.recycler) AutofitRecyclerView recycler;
+    @Bind(R.id.switcher) ViewSwitcher switcher;
+    @Bind(R.id.catalogue_grid) AutofitRecyclerView catalogueGrid;
+    @Bind(R.id.catalogue_list) RecyclerView catalogueList;
     @Bind(R.id.progress) ProgressBar progress;
     @Bind(R.id.progress_grid) ProgressBar progressGrid;
 
     private Toolbar toolbar;
     private Spinner spinner;
     private CatalogueAdapter adapter;
-    private EndlessRecyclerScrollListener scrollListener;
+    private EndlessGridScrollListener gridScrollListener;
+    private EndlessListScrollListener listScrollListener;
 
     @State String query = "";
-    @State int selectedIndex = -1;
+    @State int selectedIndex;
     private final int SEARCH_TIMEOUT = 1000;
 
     private PublishSubject<String> queryDebouncerSubject;
     private Subscription queryDebouncerSubscription;
 
+    private MenuItem displayMode;
+    private MenuItem searchItem;
+
     public static CatalogueFragment newInstance() {
         return new CatalogueFragment();
     }
@@ -77,38 +92,61 @@ public class CatalogueFragment extends BaseRxFragment<CataloguePresenter>
         View view = inflater.inflate(R.layout.fragment_catalogue, container, false);
         ButterKnife.bind(this, view);
 
-        // Initialize adapter and scroll listener
+        // Initialize adapter, scroll listener and recycler views
-        GridLayoutManager layoutManager = (GridLayoutManager) recycler.getLayoutManager();
         adapter = new CatalogueAdapter(this);
-        scrollListener = new EndlessRecyclerScrollListener(layoutManager, this::requestNextPage);
+
-        recycler.setHasFixedSize(true);
+        GridLayoutManager glm = (GridLayoutManager) catalogueGrid.getLayoutManager();
-        recycler.setAdapter(adapter);
+        gridScrollListener = new EndlessGridScrollListener(glm, this::requestNextPage);
-        recycler.addOnScrollListener(scrollListener);
+        catalogueGrid.setHasFixedSize(true);
+        catalogueGrid.setAdapter(adapter);
+        catalogueGrid.addOnScrollListener(gridScrollListener);
+
+        LinearLayoutManager llm = new LinearLayoutManager(getActivity());
+        listScrollListener = new EndlessListScrollListener(llm, this::requestNextPage);
+        catalogueList.setHasFixedSize(true);
+        catalogueList.setAdapter(adapter);
+        catalogueList.setLayoutManager(llm);
+        catalogueList.addOnScrollListener(listScrollListener);
+        catalogueList.addItemDecoration(new DividerItemDecoration(
+                ContextCompat.getDrawable(getContext(), R.drawable.line_divider)));
+
+        if (getPresenter().isListMode()) {
+            switcher.showNext();
+        }
+
+        Animation inAnim = AnimationUtils.loadAnimation(getActivity(), android.R.anim.fade_in);
+        Animation outAnim = AnimationUtils.loadAnimation(getActivity(), android.R.anim.fade_out);
+        switcher.setInAnimation(inAnim);
+        switcher.setOutAnimation(outAnim);
 
         // Create toolbar spinner
         Context themedContext = getBaseActivity().getSupportActionBar() != null ?
                 getBaseActivity().getSupportActionBar().getThemedContext() : getActivity();
         spinner = new Spinner(themedContext);
-        CatalogueSpinnerAdapter spinnerAdapter = new CatalogueSpinnerAdapter(themedContext,
+        ArrayAdapter<Source> spinnerAdapter = new ArrayAdapter<>(themedContext,
                 android.R.layout.simple_spinner_item, getPresenter().getEnabledSources());
         spinnerAdapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
-        if (savedState == null) selectedIndex = spinnerAdapter.getEmptyIndex();
+
+        if (savedState == null) {
+            selectedIndex = getPresenter().getLastUsedSourceIndex();
+        }
         spinner.setAdapter(spinnerAdapter);
         spinner.setSelection(selectedIndex);
         spinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
             @Override
             public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
                 Source source = spinnerAdapter.getItem(position);
-                // We add an empty source with id -1 that acts as a placeholder to show a hint
+                if (selectedIndex != position || adapter.isEmpty()) {
-                // that asks to select a source
-                if (source.getId() != -1 && (selectedIndex != position || adapter.isEmpty())) {
                     // Set previous selection if it's not a valid source and notify the user
                     if (!getPresenter().isValidSource(source)) {
-                        spinner.setSelection(spinnerAdapter.getEmptyIndex());
+                        spinner.setSelection(getPresenter().findFirstValidSource());
                         ToastUtil.showShort(getActivity(), R.string.source_requires_login);
                     } else {
                         selectedIndex = position;
+                        getPresenter().setEnabledSource(selectedIndex);
                         showProgressBar();
+                        glm.scrollToPositionWithOffset(0, 0);
+                        llm.scrollToPositionWithOffset(0, 0);
                         getPresenter().startRequesting(source);
                     }
                 }
@@ -130,7 +168,7 @@ public class CatalogueFragment extends BaseRxFragment<CataloguePresenter>
         inflater.inflate(R.menu.catalogue_list, menu);
 
         // Initialize search menu
-        MenuItem searchItem = menu.findItem(R.id.action_search);
+        searchItem = menu.findItem(R.id.action_search);
         final SearchView searchView = (SearchView) searchItem.getActionView();
 
         if (!TextUtils.isEmpty(query)) {
@@ -151,6 +189,22 @@ public class CatalogueFragment extends BaseRxFragment<CataloguePresenter>
                 return true;
             }
         });
+
+        // Show next display mode
+        displayMode = menu.findItem(R.id.action_display_mode);
+        int icon = getPresenter().isListMode() ?
+                R.drawable.ic_view_module_white_24dp : R.drawable.ic_view_list_white_24dp;
+        displayMode.setIcon(icon);
+    }
+
+    @Override
+    public boolean onOptionsItemSelected(MenuItem item) {
+        switch (item.getItemId()) {
+            case R.id.action_display_mode:
+                swapDisplayMode();
+                break;
+        }
+        return super.onOptionsItemSelected(item);
     }
 
     @Override
@@ -167,6 +221,9 @@ public class CatalogueFragment extends BaseRxFragment<CataloguePresenter>
 
     @Override
     public void onDestroyView() {
+        if (searchItem != null && searchItem.isActionViewExpanded()) {
+            searchItem.collapseActionView();
+        }
         toolbar.removeView(spinner);
         super.onDestroyView();
     }
@@ -193,11 +250,13 @@ public class CatalogueFragment extends BaseRxFragment<CataloguePresenter>
 
     private void restartRequest(String newQuery) {
         // If text didn't change, do nothing
-        if (query.equals(newQuery)) return;
+        if (query.equals(newQuery) || getPresenter().getSource() == null)
+            return;
 
         query = newQuery;
         showProgressBar();
-        recycler.getLayoutManager().scrollToPosition(0);
+        catalogueGrid.getLayoutManager().scrollToPosition(0);
+        catalogueList.getLayoutManager().scrollToPosition(0);
 
         getPresenter().restartRequest(query);
     }
@@ -211,9 +270,10 @@ public class CatalogueFragment extends BaseRxFragment<CataloguePresenter>
 
     public void onAddPage(int page, List<Manga> mangas) {
         hideProgressBar();
-        if (page == 1) {
+        if (page == 0) {
             adapter.clear();
-            scrollListener.resetScroll();
+            gridScrollListener.resetScroll();
+            listScrollListener.resetScroll();
         }
         adapter.addItems(mangas);
     }
@@ -223,15 +283,28 @@ public class CatalogueFragment extends BaseRxFragment<CataloguePresenter>
     }
 
     public void updateImage(Manga manga) {
-        CatalogueHolder holder = getHolder(manga);
+        CatalogueGridHolder holder = getHolder(manga);
         if (holder != null) {
             holder.setImage(manga, getPresenter());
         }
     }
 
+    public void swapDisplayMode() {
+        getPresenter().swapDisplayMode();
+        boolean isListMode = getPresenter().isListMode();
+        int icon = isListMode ?
+                R.drawable.ic_view_module_white_24dp : R.drawable.ic_view_list_white_24dp;
+        displayMode.setIcon(icon);
+        switcher.showNext();
+        if (!isListMode) {
+            // Initialize mangas if going to grid view
+            getPresenter().initializeMangas(adapter.getItems());
+        }
+    }
+
     @Nullable
-    private CatalogueHolder getHolder(Manga manga) {
+    private CatalogueGridHolder getHolder(Manga manga) {
-        return (CatalogueHolder) recycler.findViewHolderForItemId(manga.id);
+        return (CatalogueGridHolder) catalogueGrid.findViewHolderForItemId(manga.id);
     }
 
     private void showProgressBar() {
@@ -261,12 +334,15 @@ public class CatalogueFragment extends BaseRxFragment<CataloguePresenter>
     public void onListItemLongClick(int position) {
         final Manga selectedManga = adapter.getItem(position);
 
+        int textRes = selectedManga.favorite ? R.string.remove_from_library : R.string.add_to_library;
+
         new MaterialDialog.Builder(getActivity())
-                .items(getString(R.string.add_to_library))
+                .items(getString(textRes))
                 .itemsCallback((dialog, itemView, which, text) -> {
                     switch (which) {
                         case 0:
-                            getPresenter().addMangaToLibrary(selectedManga);
+                            getPresenter().changeMangaFavorite(selectedManga);
+                            adapter.notifyItemChanged(position);
                             break;
                     }
                 })

app/src/main/java/eu/kanade/tachiyomi/ui/catalogue/CatalogueGridHolder.java

@@ -0,0 +1,43 @@
+package eu.kanade.tachiyomi.ui.catalogue;
+
+import android.view.View;
+import android.widget.ImageView;
+import android.widget.TextView;
+
+import com.mikepenz.iconics.view.IconicsImageView;
+
+import butterknife.Bind;
+import butterknife.ButterKnife;
+import eu.kanade.tachiyomi.R;
+import eu.kanade.tachiyomi.data.database.models.Manga;
+
+public class CatalogueGridHolder extends CatalogueHolder {
+
+    @Bind(R.id.title) TextView title;
+    @Bind(R.id.thumbnail) ImageView thumbnail;
+    @Bind(R.id.favorite_sticker) IconicsImageView favoriteSticker;
+
+    public CatalogueGridHolder(View view, CatalogueAdapter adapter, OnListItemClickListener listener) {
+        super(view, adapter, listener);
+        ButterKnife.bind(this, view);
+    }
+
+    @Override
+    public void onSetValues(Manga manga, CataloguePresenter presenter) {
+        title.setText(manga.title);
+        // Set visibility of in library icon.
+        favoriteSticker.setVisibility(manga.favorite ? View.VISIBLE : View.GONE);
+        // Set alpha of thumbnail.
+        thumbnail.setAlpha(manga.favorite ? 0.3f : 1.0f);
+        setImage(manga, presenter);
+    }
+
+    public void setImage(Manga manga, CataloguePresenter presenter) {
+        if (manga.thumbnail_url != null) {
+            presenter.coverCache.loadFromNetwork(thumbnail, manga.thumbnail_url,
+                    presenter.getSource().getGlideHeaders());
+        } else {
+            thumbnail.setImageResource(android.R.color.transparent);
+        }
+    }
+}

app/src/main/java/eu/kanade/tachiyomi/ui/catalogue/CatalogueHolder.java

@@ -1,38 +1,15 @@
 package eu.kanade.tachiyomi.ui.catalogue;
 
 import android.view.View;
-import android.widget.ImageView;
-import android.widget.TextView;
 
-import butterknife.Bind;
-import butterknife.ButterKnife;
-import eu.kanade.tachiyomi.R;
 import eu.kanade.tachiyomi.data.database.models.Manga;
 import eu.kanade.tachiyomi.ui.base.adapter.FlexibleViewHolder;
 
-public class CatalogueHolder extends FlexibleViewHolder {
+public abstract class CatalogueHolder extends FlexibleViewHolder {
-
-    @Bind(R.id.title) TextView title;
-    @Bind(R.id.thumbnail) ImageView thumbnail;
-    @Bind(R.id.favorite_sticker) ImageView favoriteSticker;
 
     public CatalogueHolder(View view, CatalogueAdapter adapter, OnListItemClickListener listener) {
         super(view, adapter, listener);
-        ButterKnife.bind(this, view);
     }
 
-    public void onSetValues(Manga manga, CataloguePresenter presenter) {
+    abstract void onSetValues(Manga manga, CataloguePresenter presenter);
-        title.setText(manga.title);
+}
-        favoriteSticker.setVisibility(manga.favorite ? View.VISIBLE : View.GONE);
-        setImage(manga, presenter);
-    }
-
-    public void setImage(Manga manga, CataloguePresenter presenter) {
-        if (manga.thumbnail_url != null) {
-            presenter.coverCache.loadFromNetwork(thumbnail, manga.thumbnail_url,
-                    presenter.getSource().getGlideHeaders());
-        } else {
-            thumbnail.setImageResource(android.R.color.transparent);
-        }
-    }
-}

app/src/main/java/eu/kanade/tachiyomi/ui/catalogue/CatalogueListHolder.java

@@ -0,0 +1,32 @@
+package eu.kanade.tachiyomi.ui.catalogue;
+
+import android.support.v4.content.ContextCompat;
+import android.view.View;
+import android.widget.TextView;
+
+import butterknife.Bind;
+import butterknife.ButterKnife;
+import eu.kanade.tachiyomi.R;
+import eu.kanade.tachiyomi.data.database.models.Manga;
+
+public class CatalogueListHolder extends CatalogueHolder {
+
+    @Bind(R.id.title) TextView title;
+
+    private final int favoriteColor;
+    private final int unfavoriteColor;
+
+    public CatalogueListHolder(View view, CatalogueAdapter adapter, OnListItemClickListener listener) {
+        super(view, adapter, listener);
+        ButterKnife.bind(this, view);
+
+        favoriteColor = ContextCompat.getColor(view.getContext(), R.color.hint_text);
+        unfavoriteColor = ContextCompat.getColor(view.getContext(), R.color.primary_text);
+    }
+
+    @Override
+    public void onSetValues(Manga manga, CataloguePresenter presenter) {
+        title.setText(manga.title);
+        title.setTextColor(manga.favorite ? favoriteColor : unfavoriteColor);
+    }
+}

app/src/main/java/eu/kanade/tachiyomi/ui/catalogue/CataloguePresenter.java

@@ -2,7 +2,6 @@ package eu.kanade.tachiyomi.ui.catalogue;
 
 import android.os.Bundle;
 import android.text.TextUtils;
-import android.util.Pair;
 
 import com.pushtorefresh.storio.sqlite.operations.put.PutResult;
 
@@ -33,55 +32,68 @@ public class CataloguePresenter extends BasePresenter<CatalogueFragment> {
     @Inject CoverCache coverCache;
     @Inject PreferencesHelper prefs;
 
+    private List<Source> sources;
     private Source source;
     @State int sourceId;
 
     private String query;
 
-    private int currentPage;
+    private RxPager<Manga> pager;
-    private RxPager pager;
     private MangasPage lastMangasPage;
 
     private PublishSubject<List<Manga>> mangaDetailSubject;
 
+    private boolean isListMode;
+
     private static final int GET_MANGA_LIST = 1;
     private static final int GET_MANGA_DETAIL = 2;
+    private static final int GET_MANGA_PAGE = 3;
 
     @Override
     protected void onCreate(Bundle savedState) {
         super.onCreate(savedState);
 
         if (savedState != null) {
-            onProcessRestart();
+            source = sourceManager.get(sourceId);
         }
 
+        sources = sourceManager.getSources();
+
         mangaDetailSubject = PublishSubject.create();
 
-        restartableReplay(GET_MANGA_LIST,
+        pager = new RxPager<>();
-                () -> pager.pages().concatMap(page -> getMangasPageObservable(page + 1)),
-                (view, pair) -> view.onAddPage(pair.first, pair.second),
-                (view, error) -> {
-                    view.onAddPageError();
-                    Timber.e(error.getMessage());
-                });
 
-        restartableLatestCache(GET_MANGA_DETAIL,
+        startableReplay(GET_MANGA_LIST,
+                pager::results,
+                (view, pair) -> view.onAddPage(pair.first, pair.second));
+
+        startableFirst(GET_MANGA_PAGE,
+                () -> pager.request(page -> getMangasPageObservable(page + 1)),
+                (view, next) -> {},
+                (view, error) -> view.onAddPageError());
+
+        startableLatestCache(GET_MANGA_DETAIL,
                 () -> mangaDetailSubject
                         .observeOn(Schedulers.io())
                         .flatMap(Observable::from)
                         .filter(manga -> !manga.initialized)
-                        .window(3)
+                        .concatMap(this::getMangaDetails)
-                        .concatMap(pack -> pack.concatMap(this::getMangaDetails))
                         .onBackpressureBuffer()
                         .observeOn(AndroidSchedulers.mainThread()),
                 CatalogueFragment::updateImage,
                 (view, error) -> Timber.e(error.getMessage()));
+
+        add(prefs.catalogueAsList().asObservable()
+                .subscribe(this::setDisplayMode));
     }
 
-    private void onProcessRestart() {
+    private void setDisplayMode(boolean asList) {
-        source = sourceManager.get(sourceId);
+        this.isListMode = asList;
-        stop(GET_MANGA_LIST);
+        if (asList) {
-        stop(GET_MANGA_DETAIL);
+            stop(GET_MANGA_DETAIL);
+        } else {
+            start(GET_MANGA_DETAIL);
+        }
     }
 
     public void startRequesting(Source source) {
@@ -92,20 +104,23 @@ public class CataloguePresenter extends BasePresenter<CatalogueFragment> {
 
     public void restartRequest(String query) {
         this.query = query;
-        stop(GET_MANGA_LIST);
+        stop(GET_MANGA_PAGE);
-        currentPage = 1;
+        lastMangasPage = null;
-        pager = new RxPager();
 
-        start(GET_MANGA_DETAIL);
+        if (!isListMode) {
+            start(GET_MANGA_DETAIL);
+        }
         start(GET_MANGA_LIST);
+        start(GET_MANGA_PAGE);
     }
 
     public void requestNext() {
-        if (hasNextPage())
+        if (hasNextPage()) {
-            pager.requestNext(++currentPage);
+            start(GET_MANGA_PAGE);
+        }
     }
 
-    private Observable<Pair<Integer, List<Manga>>> getMangasPageObservable(int page) {
+    private Observable<List<Manga>> getMangasPageObservable(int page) {
         MangasPage nextMangasPage = new MangasPage(page);
         if (page != 1) {
             nextMangasPage.url = lastMangasPage.nextPageUrl;
@@ -120,11 +135,7 @@ public class CataloguePresenter extends BasePresenter<CatalogueFragment> {
                 .flatMap(mangasPage -> Observable.from(mangasPage.mangas))
                 .map(this::networkToLocalManga)
                 .toList()
-                .map(mangas -> Pair.create(page, mangas))
+                .doOnNext(this::initializeMangas)
-                .doOnNext(pair -> {
-                    if (mangaDetailSubject != null)
-                        mangaDetailSubject.onNext(pair.second);
-                })
                 .observeOn(AndroidSchedulers.mainThread());
     }
 
@@ -138,9 +149,12 @@ public class CataloguePresenter extends BasePresenter<CatalogueFragment> {
         return localManga;
     }
 
+    public void initializeMangas(List<Manga> mangas) {
+        mangaDetailSubject.onNext(mangas);
+    }
+
     private Observable<Manga> getMangaDetails(final Manga manga) {
         return source.pullMangaFromNetwork(manga.url)
-                .subscribeOn(Schedulers.io())
                 .flatMap(networkManga -> {
                     manga.copyFrom(networkManga);
                     db.insertManga(manga).executeAsBlocking();
@@ -157,6 +171,14 @@ public class CataloguePresenter extends BasePresenter<CatalogueFragment> {
         return lastMangasPage != null && lastMangasPage.nextPageUrl != null;
     }
 
+    public int getLastUsedSourceIndex() {
+        int index = prefs.lastUsedCatalogueSource().get();
+        if (index < 0 || index >= sources.size() || !isValidSource(sources.get(index))) {
+            return findFirstValidSource();
+        }
+        return index;
+    }
+
     public boolean isValidSource(Source source) {
         if (!source.isLoginRequired() || source.isLogged())
             return true;
@@ -165,13 +187,35 @@ public class CataloguePresenter extends BasePresenter<CatalogueFragment> {
                 || prefs.getSourcePassword(source).equals(""));
     }
 
+    public int findFirstValidSource() {
+        for (int i = 0; i < sources.size(); i++) {
+            if (isValidSource(sources.get(i))) {
+                return i;
+            }
+        }
+        return 0;
+    }
+
+    public void setEnabledSource(int index) {
+        prefs.lastUsedCatalogueSource().set(index);
+    }
+
     public List<Source> getEnabledSources() {
         // TODO filter by enabled source
         return sourceManager.getSources();
     }
 
-    public void addMangaToLibrary(Manga manga) {
+    public void changeMangaFavorite(Manga manga) {
-        manga.favorite = true;
+        manga.favorite = !manga.favorite;
         db.insertManga(manga).executeAsBlocking();
     }
+
+    public boolean isListMode() {
+        return isListMode;
+    }
+
+    public void swapDisplayMode() {
+        prefs.catalogueAsList().set(!isListMode);
+    }
+
 }

app/src/main/java/eu/kanade/tachiyomi/ui/catalogue/CatalogueSpinnerAdapter.java

@@ -1,120 +0,0 @@
-package eu.kanade.tachiyomi.ui.catalogue;
-
-import android.content.Context;
-import android.view.View;
-import android.view.ViewGroup;
-import android.widget.ArrayAdapter;
-import android.widget.TextView;
-
-import org.jsoup.nodes.Document;
-
-import java.util.List;
-
-import eu.kanade.tachiyomi.R;
-import eu.kanade.tachiyomi.data.database.models.Chapter;
-import eu.kanade.tachiyomi.data.database.models.Manga;
-import eu.kanade.tachiyomi.data.source.base.Source;
-import eu.kanade.tachiyomi.data.source.model.MangasPage;
-
-public class CatalogueSpinnerAdapter extends ArrayAdapter<Source> {
-
-    public CatalogueSpinnerAdapter(Context context, int resource, List<Source> sources) {
-        super(context, resource, sources);
-        sources.add(new SimpleSource());
-    }
-
-    @Override
-    public View getView(int position, View convertView, ViewGroup parent) {
-
-        View v = super.getView(position, convertView, parent);
-        if (position == getCount()) {
-            ((TextView)v.findViewById(android.R.id.text1)).setText("");
-            ((TextView)v.findViewById(android.R.id.text1)).setHint(getItem(getCount()).getName());
-        }
-
-        return v;
-    }
-
-    @Override
-    public int getCount() {
-        return super.getCount()-1; // you dont display last item. It is used as hint.
-    }
-
-    public int getEmptyIndex() {
-        return getCount();
-    }
-
-    private class SimpleSource extends Source {
-
-        @Override
-        public String getName() {
-            return getContext().getString(R.string.select_source);
-        }
-
-        @Override
-        public int getId() {
-            return -1;
-        }
-
-        @Override
-        public String getBaseUrl() {
-            return null;
-        }
-
-        @Override
-        public boolean isLoginRequired() {
-            return false;
-        }
-
-        @Override
-        protected String getInitialPopularMangasUrl() {
-            return null;
-        }
-
-        @Override
-        protected String getInitialSearchUrl(String query) {
-            return null;
-        }
-
-        @Override
-        protected List<Manga> parsePopularMangasFromHtml(Document parsedHtml) {
-            return null;
-        }
-
-        @Override
-        protected String parseNextPopularMangasUrl(Document parsedHtml, MangasPage page) {
-            return null;
-        }
-
-        @Override
-        protected List<Manga> parseSearchFromHtml(Document parsedHtml) {
-            return null;
-        }
-
-        @Override
-        protected String parseNextSearchUrl(Document parsedHtml, MangasPage page, String query) {
-            return null;
-        }
-
-        @Override
-        protected Manga parseHtmlToManga(String mangaUrl, String unparsedHtml) {
-            return null;
-        }
-
-        @Override
-        protected List<Chapter> parseHtmlToChapters(String unparsedHtml) {
-            return null;
-        }
-
-        @Override
-        protected List<String> parseHtmlToPageUrls(String unparsedHtml) {
-            return null;
-        }
-
-        @Override
-        protected String parseHtmlToImageUrl(String unparsedHtml) {
-            return null;
-        }
-    }
-
-}

app/src/main/java/eu/kanade/tachiyomi/ui/download/DownloadFragment.java

@@ -29,7 +29,8 @@ public class DownloadFragment extends BaseRxFragment<DownloadPresenter> {
     private DownloadAdapter adapter;
 
     private MenuItem startButton;
-    private MenuItem stopButton;
+    private MenuItem pauseButton;
+    private MenuItem clearButton;
 
     private Subscription queueStatusSubscription;
     private boolean isRunning;
@@ -64,11 +65,16 @@ public class DownloadFragment extends BaseRxFragment<DownloadPresenter> {
     public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
         inflater.inflate(R.menu.download_queue, menu);
         startButton = menu.findItem(R.id.start_queue);
-        stopButton = menu.findItem(R.id.stop_queue);
+        pauseButton = menu.findItem(R.id.pause_queue);
+        clearButton = menu.findItem(R.id.clear_queue);
+
+        if(adapter.getItemCount() > 0) {
+            clearButton.setVisible(true);
+        }
 
         // Menu seems to be inflated after onResume in fragments, so we initialize them here
         startButton.setVisible(!isRunning && !getPresenter().downloadManager.getQueue().isEmpty());
-        stopButton.setVisible(isRunning);
+        pauseButton.setVisible(isRunning);
     }
 
     @Override
@@ -77,9 +83,14 @@ public class DownloadFragment extends BaseRxFragment<DownloadPresenter> {
             case R.id.start_queue:
                 DownloadService.start(getActivity());
                 break;
-            case R.id.stop_queue:
+            case R.id.pause_queue:
                 DownloadService.stop(getActivity());
                 break;
+            case R.id.clear_queue:
+                DownloadService.stop(getActivity());
+                getPresenter().clearQueue();
+                clearButton.setVisible(false);
+                break;
         }
         return super.onOptionsItemSelected(item);
     }
@@ -101,8 +112,8 @@ public class DownloadFragment extends BaseRxFragment<DownloadPresenter> {
         isRunning = running;
         if (startButton != null)
             startButton.setVisible(!running && !getPresenter().downloadManager.getQueue().isEmpty());
-        if (stopButton != null)
+        if (pauseButton != null)
-            stopButton.setVisible(running);
+            pauseButton.setVisible(running);
     }
 
     private void createAdapter() {

app/src/main/java/eu/kanade/tachiyomi/ui/download/DownloadPresenter.java

@@ -20,15 +20,13 @@ import timber.log.Timber;
 
 public class DownloadPresenter extends BasePresenter<DownloadFragment> {
 
+    public final static int GET_DOWNLOAD_QUEUE = 1;
     @Inject DownloadManager downloadManager;
-
     private DownloadQueue downloadQueue;
     private Subscription statusSubscription;
     private Subscription pageProgressSubscription;
     private HashMap<Download, Subscription> progressSubscriptions;
 
-    public final static int GET_DOWNLOAD_QUEUE = 1;
-
     @Override
     protected void onCreate(Bundle savedState) {
         super.onCreate(savedState);
@@ -57,6 +55,7 @@ public class DownloadPresenter extends BasePresenter<DownloadFragment> {
                 }));
 
         add(pageProgressSubscription = downloadQueue.getProgressObservable()
+                .onBackpressureBuffer()
                 .observeOn(AndroidSchedulers.mainThread())
                 .subscribe(view::updateDownloadedPages));
     }
@@ -90,6 +89,7 @@ public class DownloadPresenter extends BasePresenter<DownloadFragment> {
                 .flatMap(tick -> Observable.from(download.pages)
                         .map(Page::getProgress)
                         .reduce((x, y) -> x + y))
+                .onBackpressureLatest()
                 .observeOn(AndroidSchedulers.mainThread())
                 .subscribe(progress -> {
                     if (download.totalProgress != progress) {
@@ -121,4 +121,8 @@ public class DownloadPresenter extends BasePresenter<DownloadFragment> {
         remove(statusSubscription);
     }
 
+    public void clearQueue() {
+        downloadQueue.clear();
+        start(GET_DOWNLOAD_QUEUE);
+    }
 }

app/src/main/java/eu/kanade/tachiyomi/ui/library/LibraryCategoryAdapter.java

@@ -3,8 +3,6 @@ package eu.kanade.tachiyomi.ui.library;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;
-import android.widget.Filter;
-import android.widget.Filterable;
 
 import java.util.ArrayList;
 import java.util.List;
@@ -12,28 +10,24 @@ import java.util.List;
 import eu.davidea.flexibleadapter.FlexibleAdapter;
 import eu.kanade.tachiyomi.R;
 import eu.kanade.tachiyomi.data.database.models.Manga;
-import rx.Observable;
 
-public class LibraryCategoryAdapter extends FlexibleAdapter<LibraryHolder, Manga>
+public class LibraryCategoryAdapter extends FlexibleAdapter<LibraryHolder, Manga> {
-        implements Filterable {
 
-    List<Manga> mangas;
+    private List<Manga> mangas;
-    Filter filter;
     private LibraryCategoryFragment fragment;
 
     public LibraryCategoryAdapter(LibraryCategoryFragment fragment) {
         this.fragment = fragment;
         mItems = new ArrayList<>();
-        filter = new LibraryFilter();
         setHasStableIds(true);
     }
 
     public void setItems(List<Manga> list) {
         mItems = list;
-        notifyDataSetChanged();
 
-        // TODO needed for filtering?
+        // A copy of manga that it's always unfiltered
-        mangas = list;
+        mangas = new ArrayList<>(list);
+        updateDataSet(null);
     }
 
     public void clear() {
@@ -47,12 +41,21 @@ public class LibraryCategoryAdapter extends FlexibleAdapter<LibraryHolder, Manga
 
     @Override
     public void updateDataSet(String param) {
+        if (mangas != null) {
+            filterItems(mangas);
+            notifyDataSetChanged();
+        }
+    }
 
+    @Override
+    protected boolean filterObject(Manga manga, String query) {
+        return (manga.title != null && manga.title.toLowerCase().contains(query)) ||
+                (manga.author != null && manga.author.toLowerCase().contains(query));
     }
 
     @Override
     public LibraryHolder onCreateViewHolder(ViewGroup parent, int viewType) {
-        View v = LayoutInflater.from(fragment.getActivity()).inflate(R.layout.item_catalogue, parent, false);
+        View v = LayoutInflater.from(fragment.getActivity()).inflate(R.layout.item_catalogue_grid, parent, false);
         return new LibraryHolder(v, this, fragment);
     }
 
@@ -61,49 +64,12 @@ public class LibraryCategoryAdapter extends FlexibleAdapter<LibraryHolder, Manga
         final LibraryPresenter presenter = ((LibraryFragment) fragment.getParentFragment()).getPresenter();
         final Manga manga = getItem(position);
         holder.onSetValues(manga, presenter);
-
         //When user scrolls this bind the correct selection status
         holder.itemView.setActivated(isSelected(position));
     }
 
     public int getCoverHeight() {
-        return fragment.recycler.getItemWidth() / 9 * 12;
+        return fragment.recycler.getItemWidth() / 3 * 4;
-    }
-
-    @Override
-    public Filter getFilter() {
-        return filter;
-    }
-
-    private class LibraryFilter extends Filter {
-        @Override
-        protected FilterResults performFiltering(CharSequence charSequence) {
-            FilterResults results = new FilterResults();
-            String query = charSequence.toString().toLowerCase();
-
-            if (query.length() == 0) {
-                results.values = mangas;
-                results.count = mangas.size();
-            } else {
-                List<Manga> filteredMangas = Observable.from(mangas)
-                        .filter(x ->
-                                (x.title != null && x.title.toLowerCase().contains(query)) ||
-                                (x.author != null && x.author.toLowerCase().contains(query)) ||
-                                (x.artist != null && x.artist.toLowerCase().contains(query)))
-                        .toList()
-                        .toBlocking()
-                        .single();
-                results.values = filteredMangas;
-                results.count = filteredMangas.size();
-            }
-
-            return results;
-        }
-
-        @Override
-        public void publishResults(CharSequence constraint, FilterResults results) {
-            setItems((List<Manga>) results.values);
-        }
     }
 
 }

app/src/main/java/eu/kanade/tachiyomi/ui/library/LibraryCategoryFragment.java

@@ -9,6 +9,9 @@ import android.view.ViewGroup;
 
 import com.f2prateek.rx.preferences.Preference;
 
+import org.greenrobot.eventbus.Subscribe;
+import org.greenrobot.eventbus.ThreadMode;
+
 import java.util.ArrayList;
 import java.util.List;
 
@@ -22,7 +25,6 @@ import eu.kanade.tachiyomi.event.LibraryMangasEvent;
 import eu.kanade.tachiyomi.ui.base.adapter.FlexibleViewHolder;
 import eu.kanade.tachiyomi.ui.base.fragment.BaseFragment;
 import eu.kanade.tachiyomi.ui.manga.MangaActivity;
-import eu.kanade.tachiyomi.util.EventBusHook;
 import eu.kanade.tachiyomi.widget.AutofitRecyclerView;
 import icepick.State;
 import rx.Subscription;
@@ -37,6 +39,7 @@ public class LibraryCategoryFragment extends BaseFragment
     private List<Manga> mangas;
 
     private Subscription numColumnsSubscription;
+    private Subscription searchSubscription;
 
     public static LibraryCategoryFragment newInstance(int position) {
         LibraryCategoryFragment fragment = new LibraryCategoryFragment();
@@ -44,6 +47,8 @@ public class LibraryCategoryFragment extends BaseFragment
         return fragment;
     }
 
+
+
     @Override
     public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedState) {
         // Inflate the layout for this fragment
@@ -77,19 +82,29 @@ public class LibraryCategoryFragment extends BaseFragment
             }
         }
 
+        searchSubscription = getLibraryPresenter().searchSubject
+                .subscribe(text -> {
+                    adapter.setSearchText(text);
+                    adapter.updateDataSet();
+                });
+
+
+
         return view;
+
     }
 
     @Override
     public void onDestroyView() {
         numColumnsSubscription.unsubscribe();
+        searchSubscription.unsubscribe();
         super.onDestroyView();
     }
 
     @Override
     public void onResume() {
         super.onResume();
-        registerForStickyEvents();
+        registerForEvents();
     }
 
     @Override
@@ -104,8 +119,8 @@ public class LibraryCategoryFragment extends BaseFragment
         super.onSaveInstanceState(outState);
     }
 
-    @EventBusHook
+    @Subscribe(sticky = true, threadMode = ThreadMode.MAIN)
-    public void onEventMainThread(LibraryMangasEvent event) {
+    public void onEvent(LibraryMangasEvent event) {
         List<Category> categories = getLibraryFragment().getAdapter().categories;
         // When a category is deleted, the index can be greater than the number of categories
         if (position >= categories.size())
@@ -155,15 +170,16 @@ public class LibraryCategoryFragment extends BaseFragment
 
     private void toggleSelection(int position) {
         LibraryFragment f = getLibraryFragment();
-
         adapter.toggleSelection(position, false);
         f.getPresenter().setSelection(adapter.getItem(position), adapter.isSelected(position));
 
         int count = f.getPresenter().selectedMangas.size();
         if (count == 0) {
             f.destroyActionModeIfNeeded();
-        } else {
+        }
+        else {
             f.setContextTitle(count);
+            f.setVisibilityOfCoverEdit(count);
             f.invalidateActionMode();
         }
     }

app/src/main/java/eu/kanade/tachiyomi/ui/library/LibraryFragment.java

@@ -1,12 +1,16 @@
 package eu.kanade.tachiyomi.ui.library;
 
+import android.app.Activity;
 import android.content.Intent;
+import android.net.Uri;
 import android.os.Bundle;
 import android.support.annotation.Nullable;
 import android.support.design.widget.AppBarLayout;
 import android.support.design.widget.TabLayout;
 import android.support.v4.view.ViewPager;
 import android.support.v7.view.ActionMode;
+import android.support.v7.widget.SearchView;
+import android.text.TextUtils;
 import android.view.LayoutInflater;
 import android.view.Menu;
 import android.view.MenuInflater;
@@ -16,22 +20,27 @@ import android.view.ViewGroup;
 
 import com.afollestad.materialdialogs.MaterialDialog;
 
+import org.greenrobot.eventbus.EventBus;
+
+import java.io.File;
+import java.io.IOException;
 import java.util.ArrayList;
 import java.util.List;
 import java.util.Map;
 
 import butterknife.Bind;
 import butterknife.ButterKnife;
-import de.greenrobot.event.EventBus;
 import eu.davidea.flexibleadapter.FlexibleAdapter;
 import eu.kanade.tachiyomi.R;
 import eu.kanade.tachiyomi.data.database.models.Category;
 import eu.kanade.tachiyomi.data.database.models.Manga;
+import eu.kanade.tachiyomi.data.io.IOHandler;
 import eu.kanade.tachiyomi.data.sync.LibraryUpdateService;
 import eu.kanade.tachiyomi.event.LibraryMangasEvent;
 import eu.kanade.tachiyomi.ui.base.fragment.BaseRxFragment;
 import eu.kanade.tachiyomi.ui.library.category.CategoryActivity;
 import eu.kanade.tachiyomi.ui.main.MainActivity;
+import eu.kanade.tachiyomi.util.ToastUtil;
 import icepick.State;
 import nucleus.factory.RequiresPresenter;
 
@@ -39,16 +48,25 @@ import nucleus.factory.RequiresPresenter;
 public class LibraryFragment extends BaseRxFragment<LibraryPresenter>
         implements ActionMode.Callback {
 
-    @Bind(R.id.view_pager) ViewPager viewPager;
+
-    private TabLayout tabs;
+    private static final int REQUEST_IMAGE_OPEN = 101;
-    private AppBarLayout appBar;
 
     protected LibraryAdapter adapter;
 
-    private ActionMode actionMode;
+    @Bind(R.id.view_pager) ViewPager viewPager;
 
     @State int activeCategory;
 
+    @State String query = "";
+
+    private TabLayout tabs;
+
+    private AppBarLayout appBar;
+
+    private ActionMode actionMode;
+
+    private Manga selectedCoverManga;
+
     public static LibraryFragment newInstance() {
         return new LibraryFragment();
     }
@@ -60,8 +78,7 @@ public class LibraryFragment extends BaseRxFragment<LibraryPresenter>
     }
 
     @Override
-    public View onCreateView(LayoutInflater inflater, ViewGroup container,
+    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedState) {
-                             Bundle savedInstanceState) {
         // Inflate the layout for this fragment
         View view = inflater.inflate(R.layout.fragment_library, container, false);
         setToolbarTitle(getString(R.string.label_library));
@@ -75,6 +92,10 @@ public class LibraryFragment extends BaseRxFragment<LibraryPresenter>
         viewPager.setAdapter(adapter);
         tabs.setupWithViewPager(viewPager);
 
+        if (savedState != null) {
+            getPresenter().searchSubject.onNext(query);
+        }
+
         return view;
     }
 
@@ -84,12 +105,6 @@ public class LibraryFragment extends BaseRxFragment<LibraryPresenter>
         super.onDestroyView();
     }
 
-    @Override
-    public void onPause() {
-        EventBus.getDefault().removeStickyEvent(LibraryMangasEvent.class);
-        super.onPause();
-    }
-
     @Override
     public void onSaveInstanceState(Bundle bundle) {
         activeCategory = viewPager.getCurrentItem();
@@ -99,6 +114,29 @@ public class LibraryFragment extends BaseRxFragment<LibraryPresenter>
     @Override
     public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
         inflater.inflate(R.menu.library, menu);
+
+        // Initialize search menu
+        MenuItem searchItem = menu.findItem(R.id.action_search);
+        final SearchView searchView = (SearchView) searchItem.getActionView();
+
+        if (!TextUtils.isEmpty(query)) {
+            searchItem.expandActionView();
+            searchView.setQuery(query, true);
+            searchView.clearFocus();
+        }
+        searchView.setOnQueryTextListener(new SearchView.OnQueryTextListener() {
+            @Override
+            public boolean onQueryTextSubmit(String query) {
+                onSearchTextChange(query);
+                return true;
+            }
+
+            @Override
+            public boolean onQueryTextChange(String newText) {
+                onSearchTextChange(newText);
+                return true;
+            }
+        });
     }
 
     @Override
@@ -115,6 +153,11 @@ public class LibraryFragment extends BaseRxFragment<LibraryPresenter>
         return super.onOptionsItemSelected(item);
     }
 
+    private void onSearchTextChange(String query) {
+        this.query = query;
+        getPresenter().searchSubject.onNext(query);
+    }
+
     private void onEditCategories() {
         Intent intent = CategoryActivity.newIntent(getActivity());
         startActivity(intent);
@@ -158,6 +201,11 @@ public class LibraryFragment extends BaseRxFragment<LibraryPresenter>
         actionMode.setTitle(getString(R.string.label_selected, count));
     }
 
+    public void setVisibilityOfCoverEdit(int count) {
+        // If count = 1 display edit button
+        actionMode.getMenu().findItem(R.id.action_edit_cover).setVisible((count == 1));
+    }
+
     @Override
     public boolean onCreateActionMode(ActionMode mode, Menu menu) {
         mode.getMenuInflater().inflate(R.menu.library_selection, menu);
@@ -173,6 +221,11 @@ public class LibraryFragment extends BaseRxFragment<LibraryPresenter>
     @Override
     public boolean onActionItemClicked(ActionMode mode, MenuItem item) {
         switch (item.getItemId()) {
+            case R.id.action_edit_cover:
+                changeSelectedCover(getPresenter().selectedMangas);
+                rebuildAdapter();
+                destroyActionModeIfNeeded();
+                return true;
             case R.id.action_move_to_category:
                 moveMangasToCategories(getPresenter().selectedMangas);
                 return true;
@@ -184,6 +237,15 @@ public class LibraryFragment extends BaseRxFragment<LibraryPresenter>
         return false;
     }
 
+    /**
+     * TODO workaround. Covers won't refresh any other way.
+     */
+    public void rebuildAdapter() {
+        adapter = new LibraryAdapter(getChildFragmentManager());
+        viewPager.setAdapter(adapter);
+        tabs.setupWithViewPager(viewPager);
+    }
+
     @Override
     public void onDestroyActionMode(ActionMode mode) {
         adapter.setSelectionMode(FlexibleAdapter.MODE_SINGLE);
@@ -197,6 +259,53 @@ public class LibraryFragment extends BaseRxFragment<LibraryPresenter>
         }
     }
 
+    private void changeSelectedCover(List<Manga> mangas) {
+        if (mangas.size() == 1) {
+            selectedCoverManga = mangas.get(0);
+            if (selectedCoverManga.favorite) {
+
+                Intent intent = new Intent();
+                intent.setType("image/*");
+                intent.setAction(Intent.ACTION_GET_CONTENT);
+                startActivityForResult(Intent.createChooser(intent,
+                        getString(R.string.file_select_cover)), REQUEST_IMAGE_OPEN);
+            } else {
+                ToastUtil.showShort(getContext(), R.string.notification_first_add_to_library);
+            }
+
+        }
+    }
+
+    @Override
+    public void onActivityResult(int requestCode, int resultCode, Intent data) {
+        if (resultCode == Activity.RESULT_OK) {
+            switch (requestCode) {
+                case (REQUEST_IMAGE_OPEN):
+                    if (selectedCoverManga != null) {
+                        // Get the file's content URI from the incoming Intent
+                        Uri selectedImageUri = data.getData();
+
+                        // Convert to absolute path to prevent FileNotFoundException
+                        String result = IOHandler.getFilePath(selectedImageUri,
+                                getContext().getContentResolver(), getContext());
+
+                        // Get file from filepath
+                        File picture = new File(result != null ? result : "");
+
+                        try {
+                            // Update cover to selected file, show error if something went wrong
+                            if (!getPresenter().editCoverWithLocalFile(picture, selectedCoverManga))
+                                ToastUtil.showShort(getContext(), R.string.notification_manga_update_failed);
+
+                        } catch (IOException e) {
+                            e.printStackTrace();
+                        }
+                    }
+                    break;
+            }
+        }
+    }
+
     private void moveMangasToCategories(List<Manga> mangas) {
         new MaterialDialog.Builder(getActivity())
                 .title(R.string.action_move_category)

app/src/main/java/eu/kanade/tachiyomi/ui/library/LibraryHolder.java

@@ -1,6 +1,7 @@
 package eu.kanade.tachiyomi.ui.library;
 
 import android.view.View;
+import android.widget.FrameLayout;
 import android.widget.ImageView;
 import android.widget.TextView;
 
@@ -17,6 +18,7 @@ import static android.widget.RelativeLayout.LayoutParams;
 
 public class LibraryHolder extends FlexibleViewHolder {
 
+    @Bind(R.id.image_container) FrameLayout container;
     @Bind(R.id.thumbnail) ImageView thumbnail;
     @Bind(R.id.title) TextView title;
     @Bind(R.id.unreadText) TextView unreadText;
@@ -24,7 +26,7 @@ public class LibraryHolder extends FlexibleViewHolder {
     public LibraryHolder(View view, LibraryCategoryAdapter adapter, OnListItemClickListener listener) {
         super(view, adapter, listener);
         ButterKnife.bind(this, view);
-        thumbnail.setLayoutParams(new LayoutParams(MATCH_PARENT, adapter.getCoverHeight()));
+        container.setLayoutParams(new LayoutParams(MATCH_PARENT, adapter.getCoverHeight()));
     }
 
     public void onSetValues(Manga manga, LibraryPresenter presenter) {
@@ -42,10 +44,12 @@ public class LibraryHolder extends FlexibleViewHolder {
 
     private void loadCover(Manga manga, Source source, CoverCache coverCache) {
         if (manga.thumbnail_url != null) {
-            coverCache.saveAndLoadFromCache(thumbnail, manga.thumbnail_url, source.getGlideHeaders());
+            coverCache.saveOrLoadFromCache(thumbnail, manga.thumbnail_url, source.getGlideHeaders());
         } else {
             thumbnail.setImageResource(android.R.color.transparent);
         }
     }
 
+
+
 }

app/src/main/java/eu/kanade/tachiyomi/ui/library/LibraryPresenter.java

@@ -3,13 +3,16 @@ package eu.kanade.tachiyomi.ui.library;
 import android.os.Bundle;
 import android.util.Pair;
 
+import org.greenrobot.eventbus.EventBus;
+
+import java.io.File;
+import java.io.IOException;
 import java.util.ArrayList;
 import java.util.List;
 import java.util.Map;
 
 import javax.inject.Inject;
 
-import de.greenrobot.event.EventBus;
 import eu.kanade.tachiyomi.data.cache.CoverCache;
 import eu.kanade.tachiyomi.data.database.DatabaseHelper;
 import eu.kanade.tachiyomi.data.database.models.Category;
@@ -21,25 +24,27 @@ import eu.kanade.tachiyomi.event.LibraryMangasEvent;
 import eu.kanade.tachiyomi.ui.base.presenter.BasePresenter;
 import rx.Observable;
 import rx.android.schedulers.AndroidSchedulers;
+import rx.subjects.BehaviorSubject;
 
 public class LibraryPresenter extends BasePresenter<LibraryFragment> {
 
+    private static final int GET_LIBRARY = 1;
+    protected List<Category> categories;
+    protected List<Manga> selectedMangas;
+    protected BehaviorSubject<String> searchSubject;
     @Inject DatabaseHelper db;
     @Inject PreferencesHelper preferences;
     @Inject CoverCache coverCache;
     @Inject SourceManager sourceManager;
 
-    protected List<Category> categories;
-    protected List<Manga> selectedMangas;
-
-    private static final int GET_LIBRARY = 1;
-
     @Override
     protected void onCreate(Bundle savedState) {
         super.onCreate(savedState);
 
         selectedMangas = new ArrayList<>();
 
+        searchSubject = BehaviorSubject.create();
+
         restartableLatestCache(GET_LIBRARY,
                 this::getLibraryObservable,
                 (view, pair) -> view.onNextLibraryUpdate(pair.first, pair.second));
@@ -50,15 +55,15 @@ public class LibraryPresenter extends BasePresenter<LibraryFragment> {
     }
 
     @Override
-    protected void onDestroy() {
+    protected void onDropView() {
         EventBus.getDefault().removeStickyEvent(LibraryMangasEvent.class);
-        super.onDestroy();
+        super.onDropView();
     }
 
     @Override
     protected void onTakeView(LibraryFragment libraryFragment) {
         super.onTakeView(libraryFragment);
-        if (!isSubscribed(GET_LIBRARY)) {
+        if (isUnsubscribed(GET_LIBRARY)) {
             start(GET_LIBRARY);
         }
     }
@@ -135,4 +140,18 @@ public class LibraryPresenter extends BasePresenter<LibraryFragment> {
 
         db.setMangaCategories(mc, mangas);
     }
+
+    /**
+     * Update cover with local file
+     */
+    public boolean editCoverWithLocalFile(File file, Manga manga) throws IOException {
+        if (!manga.initialized)
+            return false;
+
+        if (manga.favorite) {
+            coverCache.copyToLocalCache(manga.thumbnail_url, file);
+            return true;
+        }
+        return false;
+    }
 }

app/src/main/java/eu/kanade/tachiyomi/ui/main/MainActivity.java

@@ -8,8 +8,10 @@ import android.support.v4.widget.DrawerLayout;
 import android.support.v7.widget.Toolbar;
 import android.widget.FrameLayout;
 
+import com.mikepenz.google_material_typeface_library.GoogleMaterial;
 import com.mikepenz.materialdrawer.Drawer;
 import com.mikepenz.materialdrawer.DrawerBuilder;
+import com.mikepenz.materialdrawer.model.DividerDrawerItem;
 import com.mikepenz.materialdrawer.model.PrimaryDrawerItem;
 
 import butterknife.Bind;
@@ -29,12 +31,11 @@ public class MainActivity extends BaseActivity {
     @Bind(R.id.appbar) AppBarLayout appBar;
     @Bind(R.id.toolbar) Toolbar toolbar;
     @Bind(R.id.drawer_container) FrameLayout container;
-
+    @State
+    int selectedItem;
     private Drawer drawer;
     private FragmentStack fragmentStack;
 
-    @State int selectedItem;
-
     @Override
     protected void onCreate(Bundle savedState) {
         super.onCreate(savedState);
@@ -53,7 +54,7 @@ public class MainActivity extends BaseActivity {
         fragmentStack = new FragmentStack(this, getSupportFragmentManager(), R.id.content_layout,
                 fragment -> {
                     if (fragment instanceof ViewWithPresenter)
-                        ((ViewWithPresenter)fragment).getPresenter().destroy();
+                        ((ViewWithPresenter) fragment).getPresenter().destroy();
                 });
 
         drawer = new DrawerBuilder()
@@ -71,20 +72,27 @@ public class MainActivity extends BaseActivity {
                 .addDrawerItems(
                         new PrimaryDrawerItem()
                                 .withName(R.string.label_library)
-                                .withIdentifier(R.id.nav_drawer_library),
+                                .withIdentifier(R.id.nav_drawer_library)
-//                        new PrimaryDrawerItem()
+                                .withIcon(GoogleMaterial.Icon.gmd_book),
-//                                .withName(R.string.label_recent_updates)
+                        new PrimaryDrawerItem()
-//                                .withIdentifier(R.id.nav_drawer_recent_updates),
+                                .withName(R.string.label_recent_updates)
+                                .withIdentifier(R.id.nav_drawer_recent_updates)
+                                .withIcon(GoogleMaterial.Icon.gmd_update),
                         new PrimaryDrawerItem()
                                 .withName(R.string.label_catalogues)
-                                .withIdentifier(R.id.nav_drawer_catalogues),
+                                .withIdentifier(R.id.nav_drawer_catalogues)
+
+                                .withIcon(GoogleMaterial.Icon.gmd_explore),
                         new PrimaryDrawerItem()
                                 .withName(R.string.label_download_queue)
-                                .withIdentifier(R.id.nav_drawer_downloads),
+                                .withIdentifier(R.id.nav_drawer_downloads)
+                                .withIcon(GoogleMaterial.Icon.gmd_file_download),
+                        new DividerDrawerItem(),
                         new PrimaryDrawerItem()
                                 .withName(R.string.label_settings)
                                 .withIdentifier(R.id.nav_drawer_settings)
                                 .withSelectable(false)
+                                .withIcon(GoogleMaterial.Icon.gmd_settings)
                 )
                 .withSavedInstance(savedState)
                 .withOnDrawerItemClickListener(
@@ -179,4 +187,4 @@ public class MainActivity extends BaseActivity {
         return appBar;
     }
 
-}
+}

app/src/main/java/eu/kanade/tachiyomi/ui/manga/MangaActivity.java

@@ -1,15 +1,22 @@
 package eu.kanade.tachiyomi.ui.manga;
 
+import android.Manifest;
 import android.content.Context;
 import android.content.Intent;
+import android.content.pm.PackageManager;
+import android.os.Build;
 import android.os.Bundle;
 import android.support.design.widget.TabLayout;
+import android.support.v4.app.ActivityCompat;
 import android.support.v4.app.Fragment;
 import android.support.v4.app.FragmentManager;
 import android.support.v4.app.FragmentPagerAdapter;
+import android.support.v4.content.ContextCompat;
 import android.support.v4.view.ViewPager;
 import android.support.v7.widget.Toolbar;
 
+import org.greenrobot.eventbus.EventBus;
+
 import javax.inject.Inject;
 
 import butterknife.Bind;
@@ -30,21 +37,21 @@ public class MangaActivity extends BaseRxActivity<MangaPresenter> {
 
     @Bind(R.id.toolbar) Toolbar toolbar;
     @Bind(R.id.tabs) TabLayout tabs;
-    @Bind(R.id.view_pager) ViewPager view_pager;
+    @Bind(R.id.view_pager) ViewPager viewPager;
 
     @Inject PreferencesHelper preferences;
     @Inject MangaSyncManager mangaSyncManager;
 
     private MangaDetailAdapter adapter;
-    private long manga_id;
+    private boolean isOnline;
-    private boolean is_online;
 
-    public final static String MANGA_ID = "manga_id";
     public final static String MANGA_ONLINE = "manga_online";
 
     public static Intent newIntent(Context context, Manga manga) {
         Intent intent = new Intent(context, MangaActivity.class);
-        intent.putExtra(MANGA_ID, manga.id);
+        if (manga != null) {
+            EventBus.getDefault().postSticky(manga);
+        }
         return intent;
     }
 
@@ -59,23 +66,21 @@ public class MangaActivity extends BaseRxActivity<MangaPresenter> {
 
         Intent intent = getIntent();
 
-        manga_id = intent.getLongExtra(MANGA_ID, -1);
+        isOnline = intent.getBooleanExtra(MANGA_ONLINE, false);
-        is_online = intent.getBooleanExtra(MANGA_ONLINE, false);
 
         setupViewPager();
 
-        if (savedState == null)
+        requestPermissionsOnMarshmallow();
-            getPresenter().queryManga(manga_id);
     }
 
     private void setupViewPager() {
         adapter = new MangaDetailAdapter(getSupportFragmentManager(), this);
 
-        view_pager.setAdapter(adapter);
+        viewPager.setAdapter(adapter);
-        tabs.setupWithViewPager(view_pager);
+        tabs.setupWithViewPager(viewPager);
 
-        if (!is_online)
+        if (!isOnline)
-            view_pager.setCurrentItem(MangaDetailAdapter.CHAPTERS_FRAGMENT);
+            viewPager.setCurrentItem(MangaDetailAdapter.CHAPTERS_FRAGMENT);
     }
 
     public void setManga(Manga manga) {
@@ -83,7 +88,22 @@ public class MangaActivity extends BaseRxActivity<MangaPresenter> {
     }
 
     public boolean isCatalogueManga() {
-        return is_online;
+        return isOnline;
+    }
+
+    private void requestPermissionsOnMarshmallow() {
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
+            if (ContextCompat.checkSelfPermission(this,
+                    Manifest.permission.WRITE_EXTERNAL_STORAGE)
+                    != PackageManager.PERMISSION_GRANTED) {
+
+                ActivityCompat.requestPermissions(this,
+                        new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE,
+                                Manifest.permission.READ_EXTERNAL_STORAGE},
+                        1);
+
+            }
+        }
     }
 
     class MangaDetailAdapter extends FragmentPagerAdapter {
@@ -104,7 +124,7 @@ public class MangaActivity extends BaseRxActivity<MangaPresenter> {
             };
 
             pageCount = 2;
-            if (!is_online && mangaSyncManager.getMyAnimeList().isLogged())
+            if (!isOnline && mangaSyncManager.getMyAnimeList().isLogged())
                 pageCount++;
         }
 

app/src/main/java/eu/kanade/tachiyomi/ui/manga/MangaPresenter.java

@@ -2,49 +2,55 @@ package eu.kanade.tachiyomi.ui.manga;
 
 import android.os.Bundle;
 
+import org.greenrobot.eventbus.EventBus;
+import org.greenrobot.eventbus.Subscribe;
+import org.greenrobot.eventbus.ThreadMode;
+
 import javax.inject.Inject;
 
-import de.greenrobot.event.EventBus;
 import eu.kanade.tachiyomi.data.database.DatabaseHelper;
 import eu.kanade.tachiyomi.data.database.models.Manga;
+import eu.kanade.tachiyomi.event.MangaEvent;
 import eu.kanade.tachiyomi.ui.base.presenter.BasePresenter;
 import icepick.State;
 import rx.Observable;
-import rx.android.schedulers.AndroidSchedulers;
-import rx.schedulers.Schedulers;
 
 public class MangaPresenter extends BasePresenter<MangaActivity> {
 
     @Inject DatabaseHelper db;
 
-    @State long mangaId;
+    @State Manga manga;
 
-    private static final int DB_MANGA = 1;
+    private static final int GET_MANGA = 1;
 
     @Override
     protected void onCreate(Bundle savedState) {
         super.onCreate(savedState);
 
-        restartableLatestCache(DB_MANGA, this::getDbMangaObservable, MangaActivity::setManga);
+        restartableLatestCache(GET_MANGA, this::getMangaObservable, MangaActivity::setManga);
+
+        if (savedState == null)
+            registerForEvents();
     }
 
     @Override
     protected void onDestroy() {
         super.onDestroy();
         // Avoid new instances receiving wrong manga
-        EventBus.getDefault().removeStickyEvent(Manga.class);
+        EventBus.getDefault().removeStickyEvent(MangaEvent.class);
     }
 
-    private Observable<Manga> getDbMangaObservable() {
+    private Observable<Manga> getMangaObservable() {
-        return db.getManga(mangaId).asRxObservable()
+        return Observable.just(manga)
-                .subscribeOn(Schedulers.io())
+                .doOnNext(manga -> EventBus.getDefault().postSticky(new MangaEvent(manga)));
-                .observeOn(AndroidSchedulers.mainThread())
-                .doOnNext(manga -> EventBus.getDefault().postSticky(manga));
     }
 
-    public void queryManga(long mangaId) {
+    @Subscribe(sticky = true, threadMode = ThreadMode.MAIN)
-        this.mangaId = mangaId;
+    public void onEvent(Manga manga) {
-        start(DB_MANGA);
+        EventBus.getDefault().removeStickyEvent(manga);
+        unregisterForEvents();
+        this.manga = manga;
+        start(GET_MANGA);
     }
 
 }

app/src/main/java/eu/kanade/tachiyomi/ui/manga/chapter/ChaptersAdapter.java

@@ -10,6 +10,7 @@ import java.util.List;
 import eu.davidea.flexibleadapter.FlexibleAdapter;
 import eu.kanade.tachiyomi.R;
 import eu.kanade.tachiyomi.data.database.models.Chapter;
+import eu.kanade.tachiyomi.data.database.models.Manga;
 
 public class ChaptersAdapter extends FlexibleAdapter<ChaptersHolder, Chapter> {
 
@@ -33,7 +34,8 @@ public class ChaptersAdapter extends FlexibleAdapter<ChaptersHolder, Chapter> {
     @Override
     public void onBindViewHolder(ChaptersHolder holder, int position) {
         final Chapter chapter = getItem(position);
-        holder.onSetValues(fragment.getActivity(), chapter);
+        final Manga manga = fragment.getPresenter().getManga();
+        holder.onSetValues(chapter, manga);
 
         //When user scrolls this bind the correct selection status
         holder.itemView.setActivated(isSelected(position));

app/src/main/java/eu/kanade/tachiyomi/ui/manga/chapter/ChaptersFragment.java

@@ -10,6 +10,7 @@ import android.support.v7.widget.LinearLayoutManager;
 import android.support.v7.widget.RecyclerView;
 import android.view.LayoutInflater;
 import android.view.Menu;
+import android.view.MenuInflater;
 import android.view.MenuItem;
 import android.view.View;
 import android.view.ViewGroup;
@@ -18,12 +19,14 @@ import android.widget.ImageView;
 
 import com.afollestad.materialdialogs.MaterialDialog;
 
+import java.util.ArrayList;
 import java.util.List;
 
 import butterknife.Bind;
 import butterknife.ButterKnife;
 import eu.kanade.tachiyomi.R;
 import eu.kanade.tachiyomi.data.database.models.Chapter;
+import eu.kanade.tachiyomi.data.database.models.Manga;
 import eu.kanade.tachiyomi.data.download.DownloadService;
 import eu.kanade.tachiyomi.data.download.model.Download;
 import eu.kanade.tachiyomi.ui.base.adapter.FlexibleViewHolder;
@@ -61,6 +64,12 @@ public class ChaptersFragment extends BaseRxFragment<ChaptersPresenter> implemen
         return new ChaptersFragment();
     }
 
+    @Override
+    public void onCreate(Bundle bundle) {
+        super.onCreate(bundle);
+        setHasOptionsMenu(true);
+    }
+
     @Override
     public View onCreateView(LayoutInflater inflater, ViewGroup container,
                              Bundle savedInstanceState) {
@@ -71,26 +80,14 @@ public class ChaptersFragment extends BaseRxFragment<ChaptersPresenter> implemen
         // Init RecyclerView and adapter
         linearLayout = new LinearLayoutManager(getActivity());
         recyclerView.setLayoutManager(linearLayout);
-        recyclerView.addItemDecoration(new DividerItemDecoration(ContextCompat.getDrawable(getContext(), R.drawable.line_divider)));
+        recyclerView.addItemDecoration(new DividerItemDecoration(
+                ContextCompat.getDrawable(getContext(), R.drawable.line_divider)));
         recyclerView.setHasFixedSize(true);
         adapter = new ChaptersAdapter(this);
         recyclerView.setAdapter(adapter);
 
-        // Set initial values
-        setReadFilter();
-        setDownloadedFilter();
-        setSortIcon();
-
-        // Init listeners
         swipeRefresh.setOnRefreshListener(this::fetchChapters);
-        readCb.setOnCheckedChangeListener((arg, isChecked) ->
+
-                getPresenter().setReadFilter(isChecked));
-        downloadedCb.setOnCheckedChangeListener((v, isChecked) ->
-                getPresenter().setDownloadedFilter(isChecked));
-        sortBtn.setOnClickListener(v -> {
-            getPresenter().revertSortOrder();
-            setSortIcon();
-        });
         nextUnreadBtn.setOnClickListener(v -> {
             Chapter chapter = getPresenter().getNextUnreadChapter();
             if (chapter != null) {
@@ -104,15 +101,52 @@ public class ChaptersFragment extends BaseRxFragment<ChaptersPresenter> implemen
     }
 
     @Override
-    public void onResume() {
+    public void onPause() {
-        super.onResume();
+        // Stop recycler's scrolling when onPause is called. If the activity is finishing
-        observeChapterDownloadProgress();
+        // the presenter will be destroyed, and it could cause NPE
+        // https://github.com/inorichi/tachiyomi/issues/159
+        recyclerView.stopScroll();
+        super.onPause();
     }
 
     @Override
-    public void onPause() {
+    public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
-        unsubscribeChapterDownloadProgress();
+        inflater.inflate(R.menu.chapters, menu);
-        super.onPause();
+    }
+
+    @Override
+    public boolean onOptionsItemSelected(MenuItem item) {
+        switch (item.getItemId()) {
+            case R.id.action_display_mode:
+                showDisplayModeDialog();
+                return true;
+            case R.id.manga_download:
+                showDownloadDialog();
+                return true;
+        }
+        return false;
+    }
+
+    public void onNextManga(Manga manga) {
+        // Remove listeners before setting the values
+        readCb.setOnCheckedChangeListener(null);
+        downloadedCb.setOnCheckedChangeListener(null);
+        sortBtn.setOnClickListener(null);
+
+        // Set initial values
+        setReadFilter();
+        setDownloadedFilter();
+        setSortIcon();
+
+        // Init listeners
+        readCb.setOnCheckedChangeListener((arg, isChecked) ->
+                getPresenter().setReadFilter(isChecked));
+        downloadedCb.setOnCheckedChangeListener((v, isChecked) ->
+                getPresenter().setDownloadedFilter(isChecked));
+        sortBtn.setOnClickListener(v -> {
+            getPresenter().revertSortOrder();
+            setSortIcon();
+        });
     }
 
     public void onNextChapters(List<Chapter> chapters) {
@@ -143,9 +177,9 @@ public class ChaptersFragment extends BaseRxFragment<ChaptersPresenter> implemen
         swipeRefresh.setRefreshing(false);
     }
 
-    public void onFetchChaptersError() {
+    public void onFetchChaptersError(Throwable error) {
         swipeRefresh.setRefreshing(false);
-        ToastUtil.showShort(getContext(), R.string.fetch_chapters_error);
+        ToastUtil.showShort(getContext(), error.getMessage());
     }
 
     public boolean isCatalogueManga() {
@@ -158,6 +192,56 @@ public class ChaptersFragment extends BaseRxFragment<ChaptersPresenter> implemen
         startActivity(intent);
     }
 
+    private void showDisplayModeDialog() {
+        final Manga manga = getPresenter().getManga();
+        if (manga == null)
+            return;
+
+        // Get available modes, ids and the selected mode
+        String[] modes = {getString(R.string.show_title), getString(R.string.show_chapter_number)};
+        int[] ids = {Manga.DISPLAY_NAME, Manga.DISPLAY_NUMBER};
+        int selectedIndex = manga.getDisplayMode() == Manga.DISPLAY_NAME ? 0 : 1;
+
+        new MaterialDialog.Builder(getActivity())
+                .title(R.string.action_display_mode)
+                .items(modes)
+                .itemsIds(ids)
+                .itemsCallbackSingleChoice(selectedIndex, (dialog, itemView, which, text) -> {
+                    // Save the new display mode
+                    getPresenter().setDisplayMode(itemView.getId());
+                    // Refresh ui
+                    adapter.notifyDataSetChanged();
+                    return true;
+                })
+                .show();
+    }
+
+    private void showDownloadDialog() {
+
+        // Get available modes
+        String[] modes = {getString(R.string.download_all), getString(R.string.download_unread)};
+
+        new MaterialDialog.Builder(getActivity())
+                .title(R.string.manga_download)
+                .items(modes)
+                .itemsCallback((dialog, view, i, charSequence) -> {
+                    List<Chapter> chapters = new ArrayList<>();
+
+                    for(Chapter chapter : getPresenter().getChapters()) {
+                        if(!chapter.isDownloaded()) {
+                            if(i == 0 || (i == 1 && !chapter.read)) {
+                                chapters.add(chapter);
+                            }
+                        }
+                    }
+                    if(chapters.size() > 0) {
+                        onDownload(Observable.from(chapters));
+                    }
+                })
+                .negativeText(R.string.button_cancel)
+                .show();
+    }
+
     private void observeChapterDownloadProgress() {
         downloadProgressSubscription = getPresenter().getDownloadProgressObs()
                 .subscribe(this::onDownloadProgressChange,
@@ -175,10 +259,10 @@ public class ChaptersFragment extends BaseRxFragment<ChaptersPresenter> implemen
             holder.onProgressChange(getContext(), download.downloadedImages, download.pages.size());
     }
 
-    public void onChapterStatusChange(Chapter chapter) {
+    public void onChapterStatusChange(Download download) {
-        ChaptersHolder holder = getHolder(chapter);
+        ChaptersHolder holder = getHolder(download.chapter);
         if (holder != null)
-            holder.onStatusChange(chapter.status);
+            holder.onStatusChange(download.getStatus());
     }
 
     @Nullable
@@ -342,13 +426,13 @@ public class ChaptersFragment extends BaseRxFragment<ChaptersPresenter> implemen
 
     public void setReadFilter() {
         if (readCb != null) {
-            readCb.setChecked(getPresenter().getReadFilter());
+            readCb.setChecked(getPresenter().onlyUnread());
         }
     }
 
     public void setDownloadedFilter() {
         if (downloadedCb != null) {
-            downloadedCb.setChecked(getPresenter().getDownloadedFilter());
+            downloadedCb.setChecked(getPresenter().onlyDownloaded());
         }
     }
 

app/src/main/java/eu/kanade/tachiyomi/ui/manga/chapter/ChaptersHolder.java

@@ -2,18 +2,22 @@ package eu.kanade.tachiyomi.ui.manga.chapter;
 
 import android.content.Context;
 import android.support.v4.content.ContextCompat;
+import android.view.Menu;
 import android.view.View;
 import android.widget.PopupMenu;
 import android.widget.RelativeLayout;
 import android.widget.TextView;
 
-import java.text.SimpleDateFormat;
+import java.text.DateFormat;
+import java.text.DecimalFormat;
+import java.text.DecimalFormatSymbols;
 import java.util.Date;
 
 import butterknife.Bind;
 import butterknife.ButterKnife;
 import eu.kanade.tachiyomi.R;
 import eu.kanade.tachiyomi.data.database.models.Chapter;
+import eu.kanade.tachiyomi.data.database.models.Manga;
 import eu.kanade.tachiyomi.data.download.model.Download;
 import eu.kanade.tachiyomi.ui.base.adapter.FlexibleViewHolder;
 import rx.Observable;
@@ -21,33 +25,50 @@ import rx.Observable;
 public class ChaptersHolder extends FlexibleViewHolder {
 
     private final ChaptersAdapter adapter;
-    private Chapter item;
+    private final int readColor;
-
+    private final int unreadColor;
+    private final DecimalFormat decimalFormat;
+    private final DateFormat df = DateFormat.getDateInstance(DateFormat.SHORT);
     @Bind(R.id.chapter_title) TextView title;
     @Bind(R.id.download_text) TextView downloadText;
     @Bind(R.id.chapter_menu) RelativeLayout chapterMenu;
     @Bind(R.id.chapter_pages) TextView pages;
     @Bind(R.id.chapter_date) TextView date;
-
+    private Context context;
-    SimpleDateFormat sdf = new SimpleDateFormat("dd/MM/yyyy");
+    private Chapter item;
 
     public ChaptersHolder(View view, ChaptersAdapter adapter, OnListItemClickListener listener) {
         super(view, adapter, listener);
         this.adapter = adapter;
+        context = view.getContext();
         ButterKnife.bind(this, view);
 
+        readColor = ContextCompat.getColor(view.getContext(), R.color.hint_text);
+        unreadColor = ContextCompat.getColor(view.getContext(), R.color.primary_text);
+
+        DecimalFormatSymbols symbols = new DecimalFormatSymbols();
+        symbols.setDecimalSeparator('.');
+        decimalFormat = new DecimalFormat("#.###", symbols);
+
         chapterMenu.setOnClickListener(v -> v.post(() -> showPopupMenu(v)));
     }
 
-    public void onSetValues(Context context, Chapter chapter) {
+    public void onSetValues(Chapter chapter, Manga manga) {
         this.item = chapter;
-        title.setText(chapter.name);
+        String name;
-
+        switch (manga.getDisplayMode()) {
-        if (chapter.read) {
+            case Manga.DISPLAY_NAME:
-            title.setTextColor(ContextCompat.getColor(context, R.color.hint_text));
+            default:
-        } else {
+                name = chapter.name;
-            title.setTextColor(ContextCompat.getColor(context, R.color.primary_text));
+                break;
+            case Manga.DISPLAY_NUMBER:
+                String formattedNumber = decimalFormat.format(chapter.chapter_number);
+                name = context.getString(R.string.display_mode_chapter, formattedNumber);
+                break;
         }
+        title.setText(name);
+        title.setTextColor(chapter.read ? readColor : unreadColor);
+        date.setTextColor(chapter.read ? readColor : unreadColor);
 
         if (!chapter.read && chapter.last_page_read > 0) {
             pages.setText(context.getString(R.string.chapter_progress, chapter.last_page_read + 1));
@@ -56,7 +77,7 @@ public class ChaptersHolder extends FlexibleViewHolder {
         }
 
         onStatusChange(chapter.status);
-        date.setText(sdf.format(new Date(chapter.date_upload)));
+        date.setText(df.format(new Date(chapter.date_upload)));
     }
 
     public void onStatusChange(int status) {
@@ -86,19 +107,36 @@ public class ChaptersHolder extends FlexibleViewHolder {
         // Inflate our menu resource into the PopupMenu's Menu
         popup.getMenuInflater().inflate(R.menu.chapter_single, popup.getMenu());
 
+        // Hide download and show delete if the chapter is downloaded and
+        if(item.isDownloaded()) {
+            Menu menu = popup.getMenu();
+            menu.findItem(R.id.action_download).setVisible(false);
+            menu.findItem(R.id.action_delete).setVisible(true);
+        }
+
+        // Hide mark as unread when the chapter is unread
+        if(!item.read && item.last_page_read == 0) {
+            popup.getMenu().findItem(R.id.action_mark_as_unread).setVisible(false);
+        }
+
+        // Hide mark as read when the chapter is read
+        if(item.read) {
+            popup.getMenu().findItem(R.id.action_mark_as_read).setVisible(false);
+        }
+
         // Set a listener so we are notified if a menu item is clicked
         popup.setOnMenuItemClickListener(menuItem -> {
             Observable<Chapter> chapter = Observable.just(item);
 
             switch (menuItem.getItemId()) {
-                case R.id.action_mark_as_read:
-                    return adapter.getFragment().onMarkAsRead(chapter);
-                case R.id.action_mark_as_unread:
-                    return adapter.getFragment().onMarkAsUnread(chapter);
                 case R.id.action_download:
                     return adapter.getFragment().onDownload(chapter);
                 case R.id.action_delete:
                     return adapter.getFragment().onDelete(chapter);
+                case R.id.action_mark_as_read:
+                    return adapter.getFragment().onMarkAsRead(chapter);
+                case R.id.action_mark_as_unread:
+                    return adapter.getFragment().onMarkAsUnread(chapter);
                 case R.id.action_mark_previous_as_read:
                     return adapter.getFragment().onMarkPreviousAsRead(item);
             }

app/src/main/java/eu/kanade/tachiyomi/ui/manga/chapter/ChaptersPresenter.java

@@ -3,11 +3,14 @@ package eu.kanade.tachiyomi.ui.manga.chapter;
 import android.os.Bundle;
 import android.util.Pair;
 
+import org.greenrobot.eventbus.EventBus;
+import org.greenrobot.eventbus.Subscribe;
+import org.greenrobot.eventbus.ThreadMode;
+
 import java.util.List;
 
 import javax.inject.Inject;
 
-import de.greenrobot.event.EventBus;
 import eu.kanade.tachiyomi.data.database.DatabaseHelper;
 import eu.kanade.tachiyomi.data.database.models.Chapter;
 import eu.kanade.tachiyomi.data.database.models.Manga;
@@ -18,9 +21,9 @@ import eu.kanade.tachiyomi.data.source.SourceManager;
 import eu.kanade.tachiyomi.data.source.base.Source;
 import eu.kanade.tachiyomi.event.ChapterCountEvent;
 import eu.kanade.tachiyomi.event.DownloadChaptersEvent;
+import eu.kanade.tachiyomi.event.MangaEvent;
 import eu.kanade.tachiyomi.event.ReaderEvent;
 import eu.kanade.tachiyomi.ui.base.presenter.BasePresenter;
-import eu.kanade.tachiyomi.util.EventBusHook;
 import icepick.State;
 import rx.Observable;
 import rx.android.schedulers.AndroidSchedulers;
@@ -38,48 +41,40 @@ public class ChaptersPresenter extends BasePresenter<ChaptersFragment> {
     private Manga manga;
     private Source source;
     private List<Chapter> chapters;
-    private boolean sortOrderAToZ = true;
-    private boolean onlyUnread = true;
-    private boolean onlyDownloaded;
     @State boolean hasRequested;
 
     private PublishSubject<List<Chapter>> chaptersSubject;
 
-    private static final int DB_CHAPTERS = 1;
+    private static final int GET_MANGA = 1;
-    private static final int FETCH_CHAPTERS = 2;
+    private static final int DB_CHAPTERS = 2;
-    private static final int CHAPTER_STATUS_CHANGES = 3;
+    private static final int FETCH_CHAPTERS = 3;
+    private static final int CHAPTER_STATUS_CHANGES = 4;
 
     @Override
     protected void onCreate(Bundle savedState) {
         super.onCreate(savedState);
 
-        if (savedState != null) {
-            onProcessRestart();
-        }
-
         chaptersSubject = PublishSubject.create();
 
-        restartableLatestCache(DB_CHAPTERS,
+        startableLatestCache(GET_MANGA,
+                () -> Observable.just(manga),
+                ChaptersFragment::onNextManga);
+
+        startableLatestCache(DB_CHAPTERS,
                 this::getDbChaptersObs,
                 ChaptersFragment::onNextChapters);
 
-        restartableFirst(FETCH_CHAPTERS,
+        startableFirst(FETCH_CHAPTERS,
                 this::getOnlineChaptersObs,
                 (view, result) -> view.onFetchChaptersDone(),
-                (view, error) -> view.onFetchChaptersError());
+                (view, error) -> view.onFetchChaptersError(error));
 
-        restartableLatestCache(CHAPTER_STATUS_CHANGES,
+        startableLatestCache(CHAPTER_STATUS_CHANGES,
                 this::getChapterStatusObs,
-                (view, download) -> view.onChapterStatusChange(download.chapter),
+                (view, download) -> view.onChapterStatusChange(download),
                 (view, error) -> Timber.e(error.getCause(), error.getMessage()));
 
-        registerForStickyEvents();
+        registerForEvents();
-    }
-
-    private void onProcessRestart() {
-        stop(DB_CHAPTERS);
-        stop(FETCH_CHAPTERS);
-        stop(CHAPTER_STATUS_CHANGES);
     }
 
     @Override
@@ -89,11 +84,12 @@ public class ChaptersPresenter extends BasePresenter<ChaptersFragment> {
         super.onDestroy();
     }
 
-    @EventBusHook
+    @Subscribe(sticky = true, threadMode = ThreadMode.MAIN)
-    public void onEventMainThread(Manga manga) {
+    public void onEvent(MangaEvent event) {
-        this.manga = manga;
+        this.manga = event.manga;
+        start(GET_MANGA);
 
-        if (!isSubscribed(DB_CHAPTERS)) {
+        if (isUnsubscribed(DB_CHAPTERS)) {
             source = sourceManager.get(manga.source);
             start(DB_CHAPTERS);
 
@@ -135,13 +131,13 @@ public class ChaptersPresenter extends BasePresenter<ChaptersFragment> {
     private Observable<List<Chapter>> applyChapterFilters(List<Chapter> chapters) {
         Observable<Chapter> observable = Observable.from(chapters)
                 .subscribeOn(Schedulers.io());
-        if (onlyUnread) {
+        if (onlyUnread()) {
             observable = observable.filter(chapter -> !chapter.read);
         }
-        if (onlyDownloaded) {
+        if (onlyDownloaded()) {
             observable = observable.filter(chapter -> chapter.status == Download.DOWNLOADED);
         }
-        return observable.toSortedList((chapter, chapter2) -> sortOrderAToZ ?
+        return observable.toSortedList((chapter, chapter2) -> getSortOrder() ?
                 Float.compare(chapter2.chapter_number, chapter.chapter_number) :
                 Float.compare(chapter.chapter_number, chapter2.chapter_number));
     }
@@ -175,7 +171,7 @@ public class ChaptersPresenter extends BasePresenter<ChaptersFragment> {
                 break;
             }
         }
-        if (onlyDownloaded && download.getStatus() == Download.DOWNLOADED)
+        if (onlyDownloaded() && download.getStatus() == Download.DOWNLOADED)
             refreshChapters();
     }
 
@@ -231,7 +227,7 @@ public class ChaptersPresenter extends BasePresenter<ChaptersFragment> {
                 }, error -> {
                     Timber.e(error.getMessage());
                 }, () -> {
-                    if (onlyDownloaded)
+                    if (onlyDownloaded())
                         refreshChapters();
                 }));
     }
@@ -241,32 +237,38 @@ public class ChaptersPresenter extends BasePresenter<ChaptersFragment> {
     }
 
     public void revertSortOrder() {
-        //TODO manga.chapter_order
+        manga.setChapterOrder(getSortOrder() ? Manga.SORT_ZA : Manga.SORT_AZ);
-        sortOrderAToZ = !sortOrderAToZ;
+        db.insertManga(manga).executeAsBlocking();
         refreshChapters();
     }
 
     public void setReadFilter(boolean onlyUnread) {
-        //TODO do we need save filter for manga?
+        manga.setReadFilter(onlyUnread ? Manga.SHOW_UNREAD : Manga.SHOW_ALL);
-        this.onlyUnread = onlyUnread;
+        db.insertManga(manga).executeAsBlocking();
         refreshChapters();
     }
 
     public void setDownloadedFilter(boolean onlyDownloaded) {
-        this.onlyDownloaded = onlyDownloaded;
+        manga.setDownloadedFilter(onlyDownloaded ? Manga.SHOW_DOWNLOADED : Manga.SHOW_ALL);
+        db.insertManga(manga).executeAsBlocking();
         refreshChapters();
     }
 
+    public void setDisplayMode(int mode) {
+        manga.setDisplayMode(mode);
+        db.insertManga(manga).executeAsBlocking();
+    }
+
+    public boolean onlyDownloaded() {
+        return manga.getDownloadedFilter() == Manga.SHOW_DOWNLOADED;
+    }
+
+    public boolean onlyUnread() {
+        return manga.getReadFilter() == Manga.SHOW_UNREAD;
+    }
+
     public boolean getSortOrder() {
-        return sortOrderAToZ;
+        return manga.sortChaptersAZ();
-    }
-
-    public boolean getReadFilter() {
-        return onlyUnread;
-    }
-
-    public boolean getDownloadedFilter() {
-        return onlyDownloaded;
     }
 
     public Manga getManga() {

app/src/main/java/eu/kanade/tachiyomi/ui/manga/info/MangaInfoFragment.java

@@ -1,11 +1,12 @@
 package eu.kanade.tachiyomi.ui.manga.info;
 
 import android.os.Bundle;
+import android.support.design.widget.FloatingActionButton;
+import android.support.v4.content.ContextCompat;
 import android.support.v4.widget.SwipeRefreshLayout;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;
-import android.widget.Button;
 import android.widget.ImageView;
 import android.widget.TextView;
 
@@ -16,100 +17,227 @@ import butterknife.ButterKnife;
 import eu.kanade.tachiyomi.R;
 import eu.kanade.tachiyomi.data.cache.CoverCache;
 import eu.kanade.tachiyomi.data.database.models.Manga;
+import eu.kanade.tachiyomi.data.source.base.Source;
 import eu.kanade.tachiyomi.ui.base.fragment.BaseRxFragment;
 import nucleus.factory.RequiresPresenter;
 
+/**
+ * Fragment that shows manga information.
+ * Uses R.layout.fragment_manga_info.
+ * UI related actions should be called from here.
+ */
 @RequiresPresenter(MangaInfoPresenter.class)
 public class MangaInfoFragment extends BaseRxFragment<MangaInfoPresenter> {
-
+    /**
+     * SwipeRefreshLayout showing refresh status
+     */
     @Bind(R.id.swipe_refresh) SwipeRefreshLayout swipeRefresh;
 
+    /**
+     * TextView containing artist information.
+     */
     @Bind(R.id.manga_artist) TextView artist;
+
+    /**
+     * TextView containing author information.
+     */
     @Bind(R.id.manga_author) TextView author;
+
+    /**
+     * TextView containing chapter count.
+     */
     @Bind(R.id.manga_chapters) TextView chapterCount;
+
+    /**
+     * TextView containing genres.
+     */
     @Bind(R.id.manga_genres) TextView genres;
+
+    /**
+     * TextView containing status (ongoing, finished).
+     */
     @Bind(R.id.manga_status) TextView status;
+
+    /**
+     * TextView containing source.
+     */
+    @Bind(R.id.manga_source) TextView source;
+
+    /**
+     * TextView containing manga summary.
+     */
     @Bind(R.id.manga_summary) TextView description;
+
+    /**
+     * ImageView of cover.
+     */
     @Bind(R.id.manga_cover) ImageView cover;
 
-    @Bind(R.id.action_favorite) Button favoriteBtn;
+    /**
+     * ImageView containing manga cover shown as blurred backdrop.
+     */
+    @Bind(R.id.backdrop) ImageView backdrop;
 
+    /**
+     * FAB anchored to bottom of top view used to (add / remove) manga (to / from) library.
+     */
+    @Bind(R.id.fab_favorite) FloatingActionButton fabFavorite;
 
+    /**
+     * Create new instance of MangaInfoFragment.
+     *
+     * @return MangaInfoFragment.
+     */
     public static MangaInfoFragment newInstance() {
         return new MangaInfoFragment();
     }
 
-    @Override
-    public void onCreate(Bundle savedState) {
-        super.onCreate(savedState);
-        setHasOptionsMenu(true);
-    }
-
     @Override
     public View onCreateView(LayoutInflater inflater, ViewGroup container,
                              Bundle savedInstanceState) {
-        // Inflate the layout for this fragment
+        // Inflate the layout for this fragment.
         View view = inflater.inflate(R.layout.fragment_manga_info, container, false);
+
+        // Bind layout objects.
         ButterKnife.bind(this, view);
 
-        favoriteBtn.setOnClickListener(v -> {
+        // Set onclickListener to toggle favorite when FAB clicked.
-            getPresenter().toggleFavorite();
+        fabFavorite.setOnClickListener(v -> getPresenter().toggleFavorite());
-        });
+
+        // Set SwipeRefresh to refresh manga data.
         swipeRefresh.setOnRefreshListener(this::fetchMangaFromSource);
 
         return view;
     }
 
-    public void onNextManga(Manga manga) {
+    /**
+     * Check if manga is initialized.
+     * If true update view with manga information,
+     * if false fetch manga information
+     *
+     * @param manga  manga object containing information about manga.
+     * @param source the source of the manga.
+     */
+    public void onNextManga(Manga manga, Source source) {
         if (manga.initialized) {
-            setMangaInfo(manga);
+            // Update view.
+            setMangaInfo(manga, source);
         } else {
-            // Initialize manga
+            // Initialize manga.
             fetchMangaFromSource();
         }
     }
 
-    private void setMangaInfo(Manga manga) {
+    /**
+     * Update the view with manga information.
+     *
+     * @param manga       manga object containing information about manga.
+     * @param mangaSource the source of the manga.
+     */
+    private void setMangaInfo(Manga manga, Source mangaSource) {
+        // Update artist TextView.
         artist.setText(manga.artist);
+
+        // Update author TextView.
         author.setText(manga.author);
+
+        // If manga source is known update source TextView.
+        if (mangaSource != null) {
+            source.setText(mangaSource.getName());
+        }
+
+        // Update genres TextView.
         genres.setText(manga.genre);
+
+        // Update status TextView.
         status.setText(manga.getStatus(getActivity()));
+
+        // Update description TextView.
         description.setText(manga.description);
 
-        setFavoriteText(manga.favorite);
+        // Set the favorite drawable to the correct one.
+        setFavoriteDrawable(manga.favorite);
 
+        // Initialize CoverCache and Glide headers to retrieve cover information.
         CoverCache coverCache = getPresenter().coverCache;
         LazyHeaders headers = getPresenter().source.getGlideHeaders();
-        if (manga.thumbnail_url != null && cover.getDrawable() == null) {
+
-            if (manga.favorite) {
+        // Check if thumbnail_url is given.
-                coverCache.saveAndLoadFromCache(cover, manga.thumbnail_url, headers);
+        if (manga.thumbnail_url != null) {
-            } else {
+            // Check if cover is already drawn.
-                coverCache.loadFromNetwork(cover, manga.thumbnail_url, headers);
+            if (cover.getDrawable() == null) {
+                // If manga is in library then (download / save) (from / to) local cache if available,
+                // else download from network.
+                if (manga.favorite) {
+                    coverCache.saveOrLoadFromCache(cover, manga.thumbnail_url, headers);
+                } else {
+                    coverCache.loadFromNetwork(cover, manga.thumbnail_url, headers);
+                }
+            }
+            // Check if backdrop is already drawn.
+            if (backdrop.getDrawable() == null) {
+                // If manga is in library then (download / save) (from / to) local cache if available,
+                // else download from network.
+                if (manga.favorite) {
+                    coverCache.saveOrLoadFromCache(backdrop, manga.thumbnail_url, headers);
+                } else {
+                    coverCache.loadFromNetwork(backdrop, manga.thumbnail_url, headers);
+                }
             }
         }
     }
 
+    /**
+     * Update chapter count TextView.
+     *
+     * @param count number of chapters.
+     */
     public void setChapterCount(int count) {
         chapterCount.setText(String.valueOf(count));
     }
 
-    public void setFavoriteText(boolean isFavorite) {
+    /**
-        favoriteBtn.setText(!isFavorite ? R.string.add_to_library : R.string.remove_from_library);
+     * Update FAB with correct drawable.
+     *
+     * @param isFavorite determines if manga is favorite or not.
+     */
+    private void setFavoriteDrawable(boolean isFavorite) {
+        // Set the Favorite drawable to the correct one.
+        // Border drawable if false, filled drawable if true.
+        fabFavorite.setImageDrawable(ContextCompat.getDrawable(getContext(), isFavorite ?
+                R.drawable.ic_bookmark_white_24dp :
+                R.drawable.ic_bookmark_border_white_24dp));
     }
 
+    /**
+     * Start fetching manga information from source.
+     */
     private void fetchMangaFromSource() {
         setRefreshing(true);
+        // Call presenter and start fetching manga information
         getPresenter().fetchMangaFromSource();
     }
 
+
+    /**
+     * Update swipeRefresh to stop showing refresh in progress spinner.
+     */
     public void onFetchMangaDone() {
         setRefreshing(false);
     }
 
+    /**
+     * Update swipeRefresh to start showing refresh in progress spinner.
+     */
     public void onFetchMangaError() {
         setRefreshing(false);
     }
 
+    /**
+     * Set swipeRefresh status.
+     *
+     * @param value status of manga fetch.
+     */
     private void setRefreshing(boolean value) {
         swipeRefresh.setRefreshing(value);
     }

app/src/main/java/eu/kanade/tachiyomi/ui/manga/info/MangaInfoPresenter.java

@@ -2,6 +2,9 @@ package eu.kanade.tachiyomi.ui.manga.info;
 
 import android.os.Bundle;
 
+import org.greenrobot.eventbus.Subscribe;
+import org.greenrobot.eventbus.ThreadMode;
+
 import javax.inject.Inject;
 
 import eu.kanade.tachiyomi.data.cache.CoverCache;
@@ -10,56 +13,86 @@ import eu.kanade.tachiyomi.data.database.models.Manga;
 import eu.kanade.tachiyomi.data.source.SourceManager;
 import eu.kanade.tachiyomi.data.source.base.Source;
 import eu.kanade.tachiyomi.event.ChapterCountEvent;
+import eu.kanade.tachiyomi.event.MangaEvent;
 import eu.kanade.tachiyomi.ui.base.presenter.BasePresenter;
-import eu.kanade.tachiyomi.util.EventBusHook;
 import rx.Observable;
 import rx.android.schedulers.AndroidSchedulers;
 import rx.schedulers.Schedulers;
 
+/**
+ * Presenter of MangaInfoFragment.
+ * Contains information and data for fragment.
+ * Observable updates should be called from here.
+ */
 public class MangaInfoPresenter extends BasePresenter<MangaInfoFragment> {
 
+    /**
+     * The id of the restartable.
+     */
+    private static final int GET_MANGA = 1;
+
+    /**
+     * The id of the restartable.
+     */
+    private static final int GET_CHAPTER_COUNT = 2;
+
+    /**
+     * The id of the restartable.
+     */
+    private static final int FETCH_MANGA_INFO = 3;
+
+    /**
+     * Source information.
+     */
+    protected Source source;
+
+    /**
+     * Used to connect to database.
+     */
     @Inject DatabaseHelper db;
+
+    /**
+     * Used to connect to different manga sources.
+     */
     @Inject SourceManager sourceManager;
+
+    /**
+     * Used to connect to cache.
+     */
     @Inject CoverCache coverCache;
 
+    /**
+     * Selected manga information.
+     */
     private Manga manga;
-    protected Source source;
+
+    /**
+     * Count of chapters.
+     */
     private int count = -1;
 
-    private boolean isFetching;
-
-    private static final int GET_MANGA = 1;
-    private static final int GET_CHAPTER_COUNT = 2;
-    private static final int FETCH_MANGA_INFO = 3;
-
     @Override
     protected void onCreate(Bundle savedState) {
         super.onCreate(savedState);
 
-        if (savedState != null) {
+        // Notify the view a manga is available or has changed.
-            onProcessRestart();
+        startableLatestCache(GET_MANGA,
-        }
-
-        restartableLatestCache(GET_MANGA,
                 () -> Observable.just(manga),
-                MangaInfoFragment::onNextManga);
+                (view, manga) -> view.onNextManga(manga, source));
 
-        restartableLatestCache(GET_CHAPTER_COUNT,
+        // Update chapter count.
+        startableLatestCache(GET_CHAPTER_COUNT,
                 () -> Observable.just(count),
                 MangaInfoFragment::setChapterCount);
 
-        restartableFirst(FETCH_MANGA_INFO,
+        // Fetch manga info from source.
+        startableFirst(FETCH_MANGA_INFO,
                 this::fetchMangaObs,
                 (view, manga) -> view.onFetchMangaDone(),
                 (view, error) -> view.onFetchMangaError());
 
-        registerForStickyEvents();
+        // Listen for events.
-    }
+        registerForEvents();
-
-    private void onProcessRestart() {
-        stop(GET_MANGA);
-        stop(GET_CHAPTER_COUNT);
-        stop(FETCH_MANGA_INFO);
     }
 
     @Override
@@ -68,28 +101,36 @@ public class MangaInfoPresenter extends BasePresenter<MangaInfoFragment> {
         super.onDestroy();
     }
 
-    @EventBusHook
+    @Subscribe(sticky = true, threadMode = ThreadMode.MAIN)
-    public void onEventMainThread(Manga manga) {
+    public void onEvent(MangaEvent event) {
-        this.manga = manga;
+        this.manga = event.manga;
         source = sourceManager.get(manga.source);
-        start(GET_MANGA);
+        refreshManga();
     }
 
-    @EventBusHook
+    @Subscribe(sticky = true, threadMode = ThreadMode.MAIN)
-    public void onEventMainThread(ChapterCountEvent event) {
+    public void onEvent(ChapterCountEvent event) {
         if (count != event.getCount()) {
             count = event.getCount();
+            // Update chapter count
             start(GET_CHAPTER_COUNT);
         }
     }
 
+    /**
+     * Fetch manga information from source.
+     */
     public void fetchMangaFromSource() {
-        if (!isFetching) {
+        if (isUnsubscribed(FETCH_MANGA_INFO)) {
-            isFetching = true;
             start(FETCH_MANGA_INFO);
         }
     }
 
+    /**
+     * Fetch manga information from source.
+     *
+     * @return manga information.
+     */
     private Observable<Manga> fetchMangaObs() {
         return source.pullMangaFromNetwork(manga.url)
                 .flatMap(networkManga -> {
@@ -97,23 +138,40 @@ public class MangaInfoPresenter extends BasePresenter<MangaInfoFragment> {
                     db.insertManga(manga).executeAsBlocking();
                     return Observable.just(manga);
                 })
-                .finallyDo(() -> isFetching = false)
                 .subscribeOn(Schedulers.io())
-                .observeOn(AndroidSchedulers.mainThread());
+                .observeOn(AndroidSchedulers.mainThread())
+                .doOnNext(manga -> refreshManga());
     }
 
+    /**
+     * Update favorite status of manga, (removes / adds) manga (to / from) library.
+     */
     public void toggleFavorite() {
         manga.favorite = !manga.favorite;
         onMangaFavoriteChange(manga.favorite);
         db.insertManga(manga).executeAsBlocking();
+        refreshManga();
     }
 
+
+    /**
+     * (Removes / Saves) cover depending on favorite status.
+     *
+     * @param isFavorite determines if manga is favorite or not.
+     */
     private void onMangaFavoriteChange(boolean isFavorite) {
         if (isFavorite) {
             coverCache.save(manga.thumbnail_url, source.getGlideHeaders());
         } else {
-            coverCache.delete(manga.thumbnail_url);
+            coverCache.deleteCoverFromCache(manga.thumbnail_url);
         }
     }
 
+    /**
+     * Refresh MangaInfo view.
+     */
+    private void refreshManga() {
+        start(GET_MANGA);
+    }
+
 }

app/src/main/java/eu/kanade/tachiyomi/ui/manga/myanimelist/MyAnimeListDialogFragment.java

@@ -11,7 +11,6 @@ import android.view.View;
 import android.widget.EditText;
 import android.widget.ListView;
 import android.widget.ProgressBar;
-import android.widget.TextView;
 
 import com.afollestad.materialdialogs.MaterialDialog;
 
@@ -25,11 +24,6 @@ import eu.kanade.tachiyomi.data.database.models.MangaSync;
 import rx.Subscription;
 import rx.android.schedulers.AndroidSchedulers;
 import rx.subjects.PublishSubject;
-import uk.co.ribot.easyadapter.EasyAdapter;
-import uk.co.ribot.easyadapter.ItemViewHolder;
-import uk.co.ribot.easyadapter.PositionInfo;
-import uk.co.ribot.easyadapter.annotations.LayoutId;
-import uk.co.ribot.easyadapter.annotations.ViewId;
 
 public class MyAnimeListDialogFragment extends DialogFragment {
 
@@ -37,7 +31,7 @@ public class MyAnimeListDialogFragment extends DialogFragment {
     @Bind(R.id.myanimelist_search_results) ListView searchResults;
     @Bind(R.id.progress) ProgressBar progressBar;
 
-    private EasyAdapter<MangaSync> adapter;
+    private MyAnimeListSearchAdapter adapter;
     private MangaSync selectedItem;
 
     private Subscription searchSubscription;
@@ -59,7 +53,7 @@ public class MyAnimeListDialogFragment extends DialogFragment {
         ButterKnife.bind(this, dialog.getView());
 
         // Create adapter
-        adapter = new EasyAdapter<>(getActivity(), ResultViewHolder.class);
+        adapter = new MyAnimeListSearchAdapter(getActivity());
         searchResults.setAdapter(adapter);
 
         // Set listeners
@@ -125,7 +119,7 @@ public class MyAnimeListDialogFragment extends DialogFragment {
     public void onSearchResultsError() {
         progressBar.setVisibility(View.GONE);
         searchResults.setVisibility(View.VISIBLE);
-        adapter.getItems().clear();
+        adapter.clear();
     }
 
     public MyAnimeListFragment getMALFragment() {
@@ -136,21 +130,6 @@ public class MyAnimeListDialogFragment extends DialogFragment {
         return getMALFragment().getPresenter();
     }
 
-    @LayoutId(R.layout.dialog_myanimelist_search_item)
-    public static class ResultViewHolder extends ItemViewHolder<MangaSync> {
-
-        @ViewId(R.id.myanimelist_result_title) TextView title;
-
-        public ResultViewHolder(View view) {
-            super(view);
-        }
-
-        @Override
-        public void onSetValues(MangaSync chapter, PositionInfo positionInfo) {
-            title.setText(chapter.title);
-        }
-    }
-
     private static class SimpleTextChangeListener implements TextWatcher {
 
         @Override

app/src/main/java/eu/kanade/tachiyomi/ui/manga/myanimelist/MyAnimeListPresenter.java

@@ -4,6 +4,11 @@ import android.content.Context;
 import android.os.Bundle;
 import android.text.TextUtils;
 
+import org.greenrobot.eventbus.Subscribe;
+import org.greenrobot.eventbus.ThreadMode;
+
+import java.util.List;
+
 import javax.inject.Inject;
 
 import eu.kanade.tachiyomi.R;
@@ -12,8 +17,8 @@ import eu.kanade.tachiyomi.data.database.models.Manga;
 import eu.kanade.tachiyomi.data.database.models.MangaSync;
 import eu.kanade.tachiyomi.data.mangasync.MangaSyncManager;
 import eu.kanade.tachiyomi.data.mangasync.services.MyAnimeList;
+import eu.kanade.tachiyomi.event.MangaEvent;
 import eu.kanade.tachiyomi.ui.base.presenter.BasePresenter;
-import eu.kanade.tachiyomi.util.EventBusHook;
 import eu.kanade.tachiyomi.util.ToastUtil;
 import rx.Observable;
 import rx.android.schedulers.AndroidSchedulers;
@@ -35,27 +40,23 @@ public class MyAnimeListPresenter extends BasePresenter<MyAnimeListFragment> {
     private static final int GET_SEARCH_RESULTS = 2;
     private static final int REFRESH = 3;
 
+    private static final String PREFIX_MY = "my:";
+
     @Override
     protected void onCreate(Bundle savedState) {
         super.onCreate(savedState);
 
-        if (savedState != null) {
-            onProcessRestart();
-        }
-
         myAnimeList = syncManager.getMyAnimeList();
 
-        restartableLatestCache(GET_MANGA_SYNC,
+        startableLatestCache(GET_MANGA_SYNC,
                 () -> db.getMangaSync(manga, myAnimeList).asRxObservable()
                         .doOnNext(mangaSync -> this.mangaSync = mangaSync)
                         .subscribeOn(Schedulers.io())
                         .observeOn(AndroidSchedulers.mainThread()),
                 MyAnimeListFragment::setMangaSync);
 
-        restartableLatestCache(GET_SEARCH_RESULTS,
+        startableLatestCache(GET_SEARCH_RESULTS,
-                () -> myAnimeList.search(query)
+                this::getSearchResultsObservable,
-                        .subscribeOn(Schedulers.io())
-                        .observeOn(AndroidSchedulers.mainThread()),
                 (view, results) -> {
                     view.setSearchResults(results);
                 }, (view, error) -> {
@@ -63,7 +64,7 @@ public class MyAnimeListPresenter extends BasePresenter<MyAnimeListFragment> {
                     view.setSearchResultsError();
                 });
 
-        restartableFirst(REFRESH,
+        startableFirst(REFRESH,
                 () -> myAnimeList.getList()
                         .flatMap(myList -> {
                             for (MangaSync myManga : myList) {
@@ -83,16 +84,10 @@ public class MyAnimeListPresenter extends BasePresenter<MyAnimeListFragment> {
 
     }
 
-    private void onProcessRestart() {
-        stop(GET_MANGA_SYNC);
-        stop(GET_SEARCH_RESULTS);
-        stop(REFRESH);
-    }
-
     @Override
     protected void onTakeView(MyAnimeListFragment view) {
         super.onTakeView(view);
-        registerForStickyEvents();
+        registerForEvents();
     }
 
     @Override
@@ -101,12 +96,28 @@ public class MyAnimeListPresenter extends BasePresenter<MyAnimeListFragment> {
         super.onDropView();
     }
 
-    @EventBusHook
+    @Subscribe(sticky = true, threadMode = ThreadMode.MAIN)
-    public void onEventMainThread(Manga manga) {
+    public void onEvent(MangaEvent event) {
-        this.manga = manga;
+        this.manga = event.manga;
         start(GET_MANGA_SYNC);
     }
 
+    private Observable<List<MangaSync>> getSearchResultsObservable() {
+        Observable<List<MangaSync>> observable;
+        if (query.startsWith(PREFIX_MY)) {
+            String realQuery = query.substring(PREFIX_MY.length()).toLowerCase().trim();
+            observable = myAnimeList.getList()
+                    .flatMap(Observable::from)
+                    .filter(manga -> manga.title.toLowerCase().contains(realQuery))
+                    .toList();
+        } else {
+            observable = myAnimeList.search(query);
+        }
+        return observable
+                .subscribeOn(Schedulers.io())
+                .observeOn(AndroidSchedulers.mainThread());
+    }
+
     private void updateRemote() {
         add(myAnimeList.update(mangaSync)
                 .flatMap(response -> db.insertMangaSync(mangaSync).asRxObservable())

app/src/main/java/eu/kanade/tachiyomi/ui/manga/myanimelist/MyAnimeListSearchAdapter.java

@@ -0,0 +1,61 @@
+package eu.kanade.tachiyomi.ui.manga.myanimelist;
+
+import android.content.Context;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.ArrayAdapter;
+import android.widget.TextView;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import butterknife.Bind;
+import butterknife.ButterKnife;
+import eu.kanade.tachiyomi.R;
+import eu.kanade.tachiyomi.data.database.models.MangaSync;
+
+public class MyAnimeListSearchAdapter extends ArrayAdapter<MangaSync> {
+
+    public MyAnimeListSearchAdapter(Context context) {
+        super(context, R.layout.dialog_myanimelist_search_item, new ArrayList<>());
+    }
+
+    @Override
+    public View getView(int position, View view, ViewGroup parent) {
+        // Get the data item for this position
+        MangaSync sync = getItem(position);
+        // Check if an existing view is being reused, otherwise inflate the view
+        SearchViewHolder holder; // view lookup cache stored in tag
+        if (view == null) {
+            LayoutInflater inflater = LayoutInflater.from(getContext());
+            view = inflater.inflate(R.layout.dialog_myanimelist_search_item, parent, false);
+            holder = new SearchViewHolder(view);
+            view.setTag(holder);
+        } else {
+            holder = (SearchViewHolder) view.getTag();
+        }
+        holder.onSetValues(sync);
+        return view;
+    }
+
+    public void setItems(List<MangaSync> syncs) {
+        setNotifyOnChange(false);
+        clear();
+        addAll(syncs);
+        notifyDataSetChanged();
+    }
+
+    public static class SearchViewHolder {
+
+        @Bind(R.id.myanimelist_result_title) TextView title;
+
+        public SearchViewHolder(View view) {
+            ButterKnife.bind(this, view);
+        }
+
+        public void onSetValues(MangaSync sync) {
+            title.setText(sync.title);
+        }
+    }
+}

app/src/main/java/eu/kanade/tachiyomi/ui/reader/ReaderActivity.java

@@ -3,15 +3,17 @@ package eu.kanade.tachiyomi.ui.reader;
 import android.content.Context;
 import android.content.Intent;
 import android.content.pm.ActivityInfo;
+import android.content.res.Configuration;
 import android.graphics.Color;
 import android.os.Build;
 import android.os.Bundle;
 import android.support.annotation.NonNull;
+import android.support.v4.app.FragmentManager;
 import android.support.v4.content.ContextCompat;
 import android.support.v7.widget.Toolbar;
+import android.view.KeyEvent;
 import android.view.Menu;
 import android.view.MenuItem;
-import android.view.Surface;
 import android.view.View;
 import android.view.WindowManager;
 import android.widget.TextView;
@@ -20,11 +22,8 @@ import com.afollestad.materialdialogs.MaterialDialog;
 
 import java.util.List;
 
-import javax.inject.Inject;
-
 import butterknife.Bind;
 import butterknife.ButterKnife;
-import eu.kanade.tachiyomi.App;
 import eu.kanade.tachiyomi.R;
 import eu.kanade.tachiyomi.data.database.models.Chapter;
 import eu.kanade.tachiyomi.data.database.models.Manga;
@@ -49,8 +48,6 @@ public class ReaderActivity extends BaseRxActivity<ReaderPresenter> {
     @Bind(R.id.page_number) TextView pageNumber;
     @Bind(R.id.toolbar) Toolbar toolbar;
 
-    @Inject PreferencesHelper preferences;
-
     private BaseReader viewer;
     private ReaderMenu readerMenu;
 
@@ -75,7 +72,6 @@ public class ReaderActivity extends BaseRxActivity<ReaderPresenter> {
     @Override
     public void onCreate(Bundle savedState) {
         super.onCreate(savedState);
-        App.get(this).getComponent().inject(this);
         setContentView(R.layout.activity_reader);
         ButterKnife.bind(this);
 
@@ -158,37 +154,90 @@ public class ReaderActivity extends BaseRxActivity<ReaderPresenter> {
         }
     }
 
+    @Override
+    public boolean dispatchKeyEvent(KeyEvent event) {
+        int action = event.getAction();
+        int keyCode = event.getKeyCode();
+        switch (keyCode) {
+            case KeyEvent.KEYCODE_VOLUME_DOWN:
+                if (action == KeyEvent.ACTION_UP && viewer != null)
+                    viewer.moveToNext();
+                return true;
+            case KeyEvent.KEYCODE_VOLUME_UP:
+                if (action == KeyEvent.ACTION_UP && viewer != null)
+                    viewer.moveToPrevious();
+                return true;
+            default:
+                return super.dispatchKeyEvent(event);
+        }
+    }
+
     public void onChapterError() {
         finish();
         ToastUtil.showShort(this, R.string.page_list_error);
     }
 
-    public void onChapterReady(List<Page> pages, Manga manga, Chapter chapter, int currentPage) {
+    public void onChapterAppendError() {
-        if (viewer == null) {
+        // Ignore
-            viewer = createViewer(manga);
+    }
-            getSupportFragmentManager().beginTransaction().replace(R.id.reader, viewer).commit();
+
+    public void onChapterReady(Manga manga, Chapter chapter, Page currentPage) {
+        List<Page> pages = chapter.getPages();
+        if (currentPage == null) {
+            currentPage = pages.get(pages.size() - 1);
         }
-        viewer.onPageListReady(pages, currentPage);
+
-        readerMenu.onChapterReady(pages.size(), manga, chapter, currentPage);
+        if (viewer == null) {
+            viewer = getOrCreateViewer(manga);
+        }
+        viewer.onPageListReady(chapter, currentPage);
+        readerMenu.setActiveManga(manga);
+        readerMenu.setActiveChapter(chapter, currentPage.getPageNumber());
+    }
+
+    public void onEnterChapter(Chapter chapter, int currentPage) {
+        if (currentPage == -1) {
+            currentPage = chapter.getPages().size() - 1;
+        }
+        getPresenter().setActiveChapter(chapter);
+        readerMenu.setActiveChapter(chapter, currentPage);
+    }
+
+    public void onAppendChapter(Chapter chapter) {
+        viewer.onPageListAppendReady(chapter);
     }
 
     public void onAdjacentChapters(Chapter previous, Chapter next) {
         readerMenu.onAdjacentChapters(previous, next);
     }
 
-    private BaseReader createViewer(Manga manga) {
+    private BaseReader getOrCreateViewer(Manga manga) {
-        int mangaViewer = manga.viewer == 0 ? preferences.getDefaultViewer() : manga.viewer;
+        int mangaViewer = manga.viewer == 0 ? getPreferences().getDefaultViewer() : manga.viewer;
 
-        switch (mangaViewer) {
+        FragmentManager fm = getSupportFragmentManager();
-            case LEFT_TO_RIGHT: default:
+
-                return new LeftToRightReader();
+        // Try to reuse the viewer using its tag
-            case RIGHT_TO_LEFT:
+        BaseReader fragment = (BaseReader) fm.findFragmentByTag(manga.viewer + "");
-                return new RightToLeftReader();
+        if (fragment == null) {
-            case VERTICAL:
+            // Create a new viewer
-                return new VerticalReader();
+            switch (mangaViewer) {
-            case WEBTOON:
+                case LEFT_TO_RIGHT: default:
-                return new WebtoonReader();
+                    fragment = new LeftToRightReader();
+                    break;
+                case RIGHT_TO_LEFT:
+                    fragment = new RightToLeftReader();
+                    break;
+                case VERTICAL:
+                    fragment = new VerticalReader();
+                    break;
+                case WEBTOON:
+                    fragment = new WebtoonReader();
+                    break;
+            }
+
+            fm.beginTransaction().replace(R.id.reader, fragment, manga.viewer + "").commit();
         }
+        return fragment;
     }
 
     public void onPageChanged(int currentPageIndex, int totalPages) {
@@ -197,8 +246,9 @@ public class ReaderActivity extends BaseRxActivity<ReaderPresenter> {
         readerMenu.onPageChanged(currentPageIndex);
     }
 
-    public void setSelectedPage(int pageIndex) {
+    public void gotoPageInCurrentChapter(int pageIndex) {
-        viewer.setSelectedPage(pageIndex);
+        Page requestedPage = viewer.getCurrentPage().getChapter().getPages().get(pageIndex);
+        viewer.setSelectedPage(requestedPage);
     }
 
     public void onCenterSingleTap() {
@@ -206,7 +256,7 @@ public class ReaderActivity extends BaseRxActivity<ReaderPresenter> {
     }
 
     public void requestNextChapter() {
-        getPresenter().setCurrentPage(viewer != null ? viewer.getCurrentPage() : 0);
+        getPresenter().setCurrentPage(viewer.getCurrentPage());
         if (!getPresenter().loadNextChapter()) {
             ToastUtil.showShort(this, R.string.no_next_chapter);
         }
@@ -214,20 +264,22 @@ public class ReaderActivity extends BaseRxActivity<ReaderPresenter> {
     }
 
     public void requestPreviousChapter() {
-        getPresenter().setCurrentPage(viewer != null ? viewer.getCurrentPage() : 0);
+        getPresenter().setCurrentPage(viewer.getCurrentPage());
         if (!getPresenter().loadPreviousChapter()) {
             ToastUtil.showShort(this, R.string.no_previous_chapter);
         }
     }
 
     private void initializeSettings() {
+        PreferencesHelper preferences = getPreferences();
+
         subscriptions.add(preferences.showPageNumber()
                 .asObservable()
                 .subscribe(this::setPageNumberVisibility));
 
-        subscriptions.add(preferences.lockOrientation()
+        subscriptions.add(preferences.rotation()
                 .asObservable()
-                .subscribe(this::setOrientation));
+                .subscribe(this::setRotation));
 
         subscriptions.add(preferences.hideStatusBar()
                 .asObservable()
@@ -247,28 +299,25 @@ public class ReaderActivity extends BaseRxActivity<ReaderPresenter> {
                 .subscribe(this::applyTheme));
     }
 
-    private void setOrientation(boolean locked) {
+    private void setRotation(int rotation) {
-        if (locked) {
+        switch (rotation) {
-            int orientation;
+            // Rotation free
-            int rotation = ((WindowManager) getSystemService(
+            case 1:
-                    Context.WINDOW_SERVICE)).getDefaultDisplay().getRotation();
+                setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_UNSPECIFIED);
-            switch (rotation) {
+                break;
-                case Surface.ROTATION_0:
+            // Lock in current rotation
-                    orientation = ActivityInfo.SCREEN_ORIENTATION_PORTRAIT;
+            case 2:
-                    break;
+                int currentOrientation = getResources().getConfiguration().orientation;
-                case Surface.ROTATION_90:
+                setRotation(currentOrientation == Configuration.ORIENTATION_PORTRAIT ? 3 : 4);
-                    orientation = ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE;
+                break;
-                    break;
+            // Lock in portrait
-                case Surface.ROTATION_180:
+            case 3:
-                    orientation = ActivityInfo.SCREEN_ORIENTATION_REVERSE_PORTRAIT;
+                setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_SENSOR_PORTRAIT);
-                    break;
+                break;
-                default:
+            // Lock in landscape
-                    orientation = ActivityInfo.SCREEN_ORIENTATION_REVERSE_LANDSCAPE;
+            case 4:
-                    break;
+                setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_SENSOR_LANDSCAPE);
-            }
+                break;
-            setRequestedOrientation(orientation);
-        } else {
-            setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_UNSPECIFIED);
         }
     }
 
@@ -286,7 +335,7 @@ public class ReaderActivity extends BaseRxActivity<ReaderPresenter> {
 
     private void setCustomBrightness(boolean enabled) {
         if (enabled) {
-            subscriptions.add(customBrightnessSubscription = preferences.customBrightnessValue()
+            subscriptions.add(customBrightnessSubscription = getPreferences().customBrightnessValue()
                     .asObservable()
                     .subscribe(this::setCustomBrightnessValue));
         } else {
@@ -344,7 +393,7 @@ public class ReaderActivity extends BaseRxActivity<ReaderPresenter> {
     }
 
     public PreferencesHelper getPreferences() {
-        return preferences;
+        return getPresenter().prefs;
     }
 
     public BaseReader getViewer() {

app/src/main/java/eu/kanade/tachiyomi/ui/reader/ReaderMenu.java

@@ -2,11 +2,13 @@ package eu.kanade.tachiyomi.ui.reader;
 
 import android.app.Dialog;
 import android.content.Context;
+import android.content.res.Configuration;
 import android.support.v7.widget.Toolbar;
 import android.view.Gravity;
 import android.view.Menu;
 import android.view.MenuItem;
 import android.view.View;
+import android.view.ViewGroup;
 import android.view.WindowManager;
 import android.view.WindowManager.LayoutParams;
 import android.view.animation.Animation;
@@ -42,9 +44,10 @@ public class ReaderMenu {
     @Bind(R.id.page_seeker) SeekBar seekBar;
     @Bind(R.id.total_pages) TextView totalPages;
     @Bind(R.id.lock_orientation) ImageButton lockOrientation;
+    @Bind(R.id.reader_zoom_selector) ImageButton zoomSelector;
+    @Bind(R.id.reader_scale_type_selector) ImageButton scaleTypeSelector;
     @Bind(R.id.reader_selector) ImageButton readerSelector;
     @Bind(R.id.reader_extra_settings) ImageButton extraSettings;
-    @Bind(R.id.reader_brightness) ImageButton brightnessSettings;
 
     private MenuItem nextChapterBtn;
     private MenuItem prevChapterBtn;
@@ -56,7 +59,6 @@ public class ReaderMenu {
 
     @State boolean showing;
     private PopupWindow settingsPopup;
-    private PopupWindow brightnessPopup;
     private boolean inverted;
 
     private DecimalFormat decimalFormat;
@@ -70,10 +72,10 @@ public class ReaderMenu {
         bottomMenu.setOnTouchListener((v, event) -> true);
 
         seekBar.setOnSeekBarChangeListener(new PageSeekBarChangeListener());
-        decimalFormat = new DecimalFormat("#.##");
+        decimalFormat = new DecimalFormat("#.###");
         inverted = false;
 
-        initializeOptions();
+        initializeMenu();
     }
 
     public void add(Subscription subscription) {
@@ -110,7 +112,6 @@ public class ReaderMenu {
         bottomMenu.startAnimation(bottomMenuAnimation);
 
         settingsPopup.dismiss();
-        brightnessPopup.dismiss();
 
         showing = false;
     }
@@ -134,7 +135,7 @@ public class ReaderMenu {
         return true;
     }
 
-    public void onChapterReady(int numPages, Manga manga, Chapter chapter, int currentPageIndex) {
+    public void setActiveManga(Manga manga) {
         if (manga.viewer == ReaderActivity.RIGHT_TO_LEFT && !inverted) {
             // Invert the seekbar and textview fields for the right to left reader
             seekBar.setRotation(180);
@@ -144,14 +145,17 @@ public class ReaderMenu {
             // Don't invert again on chapter change
             inverted = true;
         }
+        activity.setToolbarTitle(manga.title);
+    }
 
+    public void setActiveChapter(Chapter chapter, int currentPageIndex) {
         // Set initial values
+        int numPages = chapter.getPages().size();
         totalPages.setText("" + numPages);
         currentPage.setText("" + (currentPageIndex + 1));
-        seekBar.setProgress(currentPageIndex);
         seekBar.setMax(numPages - 1);
+        seekBar.setProgress(currentPageIndex);
 
-        activity.setToolbarTitle(manga.title);
         activity.setToolbarSubtitle(chapter.chapter_number != -1 ?
                 activity.getString(R.string.chapter_subtitle,
                         decimalFormat.format(chapter.chapter_number)) :
@@ -175,25 +179,63 @@ public class ReaderMenu {
         if (nextChapterBtn != null) nextChapterBtn.setVisible(nextChapter != null);
     }
 
-    private void initializeOptions() {
+    @SuppressWarnings("ConstantConditions")
-        // Orientation changes
+    private void initializeMenu() {
-        add(preferences.lockOrientation().asObservable()
+        // Orientation selector
-                .subscribe(locked -> {
+        add(preferences.rotation().asObservable()
-                    int resourceId = !locked ? R.drawable.ic_screen_rotation :
+                .subscribe(value -> {
-                            activity.getResources().getConfiguration().orientation == 1 ?
+                    boolean isPortrait = activity.getResources().getConfiguration()
+                            .orientation == Configuration.ORIENTATION_PORTRAIT;
+                    int resourceId = value == 1 ? R.drawable.ic_screen_rotation : isPortrait ?
                                     R.drawable.ic_screen_lock_portrait :
                                     R.drawable.ic_screen_lock_landscape;
 
                     lockOrientation.setImageResource(resourceId);
                 }));
 
-        lockOrientation.setOnClickListener(v ->
+        lockOrientation.setOnClickListener(v -> {
-                preferences.lockOrientation().set(!preferences.lockOrientation().get()));
+            showImmersiveDialog(new MaterialDialog.Builder(activity)
+                    .title(R.string.pref_rotation_type)
+                    .items(R.array.rotation_type)
+                    .itemsCallbackSingleChoice(preferences.rotation().get() - 1,
+                            (d, itemView, which, text) -> {
+                                preferences.rotation().set(which + 1);
+                                return true;
+                            })
+                    .build());
+        });
+
+        // Zoom selector
+        zoomSelector.setOnClickListener(v -> {
+            showImmersiveDialog(new MaterialDialog.Builder(activity)
+                    .title(R.string.pref_zoom_start)
+                    .items(R.array.zoom_start)
+                    .itemsCallbackSingleChoice(preferences.zoomStart().get() - 1,
+                            (d, itemView, which, text) -> {
+                                preferences.zoomStart().set(which + 1);
+                                return true;
+                            })
+                    .build());
+        });
+
+        // Scale type selector
+        scaleTypeSelector.setOnClickListener(v -> {
+            showImmersiveDialog(new MaterialDialog.Builder(activity)
+                    .title(R.string.pref_image_scale_type)
+                    .items(R.array.image_scale_type)
+                    .itemsCallbackSingleChoice(preferences.imageScaleType().get() - 1,
+                            (d, itemView, which, text) -> {
+                                preferences.imageScaleType().set(which + 1);
+                                return true;
+                            })
+                    .build());
+        });
 
         // Reader selector
         readerSelector.setOnClickListener(v -> {
             final Manga manga = activity.getPresenter().getManga();
             showImmersiveDialog(new MaterialDialog.Builder(activity)
+                    .title(R.string.pref_viewer_type)
                     .items(R.array.viewers_selector)
                     .itemsCallbackSingleChoice(manga.viewer,
                             (d, itemView, which, text) -> {
@@ -215,17 +257,6 @@ public class ReaderMenu {
                 settingsPopup.dismiss();
         });
 
-        // Brightness popup
-        final View brightnessView = activity.getLayoutInflater().inflate(R.layout.reader_brightness, null);
-        brightnessPopup = new BrightnessPopupWindow(brightnessView);
-
-        brightnessSettings.setOnClickListener(v -> {
-            if (!brightnessPopup.isShowing())
-                brightnessPopup.showAtLocation(brightnessSettings,
-                        Gravity.BOTTOM | Gravity.LEFT, 0, bottomMenu.getHeight());
-            else
-                brightnessPopup.dismiss();
-        });
     }
 
     private void showImmersiveDialog(Dialog dialog) {
@@ -247,8 +278,11 @@ public class ReaderMenu {
         @Bind(R.id.hide_status_bar) CheckBox hideStatusBar;
         @Bind(R.id.keep_screen_on) CheckBox keepScreenOn;
         @Bind(R.id.reader_theme) CheckBox readerTheme;
+        @Bind(R.id.image_decoder_container) ViewGroup imageDecoderContainer;
         @Bind(R.id.image_decoder) TextView imageDecoder;
         @Bind(R.id.image_decoder_initial) TextView imageDecoderInitial;
+        @Bind(R.id.custom_brightness) CheckBox customBrightness;
+        @Bind(R.id.brightness_seekbar) SeekBar brightnessSeekbar;
 
         public SettingsPopupWindow(View view) {
             super(view, LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);
@@ -257,6 +291,7 @@ public class ReaderMenu {
             initializePopupMenu();
         }
 
+        @SuppressWarnings("ConstantConditions")
         private void initializePopupMenu() {
             // Load values from preferences
             enableTransitions.setChecked(preferences.enableTransitions().get());
@@ -282,7 +317,7 @@ public class ReaderMenu {
             readerTheme.setOnCheckedChangeListener((view, isChecked) ->
                     preferences.readerTheme().set(isChecked ? 1 : 0));
 
-            imageDecoder.setOnClickListener(v -> {
+            imageDecoderContainer.setOnClickListener(v -> {
                 showImmersiveDialog(new MaterialDialog.Builder(activity)
                         .title(R.string.pref_image_decoder)
                         .items(R.array.image_decoders)
@@ -294,6 +329,21 @@ public class ReaderMenu {
                                 })
                         .build());
             });
+
+            add(preferences.customBrightness()
+                    .asObservable()
+                    .subscribe(isEnabled -> {
+                        customBrightness.setChecked(isEnabled);
+                        brightnessSeekbar.setEnabled(isEnabled);
+                    }));
+
+            customBrightness.setOnCheckedChangeListener((view, isChecked) ->
+                    preferences.customBrightness().set(isChecked));
+
+            brightnessSeekbar.setMax(100);
+            brightnessSeekbar.setProgress(Math.round(
+                    preferences.customBrightnessValue().get() * brightnessSeekbar.getMax()));
+            brightnessSeekbar.setOnSeekBarChangeListener(new BrightnessSeekBarChangeListener());
         }
 
         private void setDecoderInitial(int decoder) {
@@ -314,43 +364,12 @@ public class ReaderMenu {
 
     }
 
-    class BrightnessPopupWindow extends PopupWindow {
-
-        @Bind(R.id.custom_brightness) CheckBox customBrightness;
-        @Bind(R.id.brightness_seekbar) SeekBar brightnessSeekbar;
-
-        public BrightnessPopupWindow(View view) {
-            super(view, LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);
-            setAnimationStyle(R.style.reader_brightness_popup_animation);
-            ButterKnife.bind(this, view);
-            initializePopupMenu();
-        }
-
-        private void initializePopupMenu() {
-            add(preferences.customBrightness()
-                    .asObservable()
-                    .subscribe(isEnabled -> {
-                        customBrightness.setChecked(isEnabled);
-                        brightnessSeekbar.setEnabled(isEnabled);
-                    }));
-
-            customBrightness.setOnCheckedChangeListener((view, isChecked) ->
-                    preferences.customBrightness().set(isChecked));
-
-            brightnessSeekbar.setMax(100);
-            brightnessSeekbar.setProgress(Math.round(
-                    preferences.customBrightnessValue().get() * brightnessSeekbar.getMax()));
-            brightnessSeekbar.setOnSeekBarChangeListener(new BrightnessSeekBarChangeListener());
-        }
-
-    }
-
     class PageSeekBarChangeListener implements SeekBar.OnSeekBarChangeListener {
 
         @Override
         public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) {
             if (fromUser) {
-                activity.setSelectedPage(progress);
+                activity.gotoPageInCurrentChapter(progress);
             }
         }
 

app/src/main/java/eu/kanade/tachiyomi/ui/reader/ReaderPresenter.java

@@ -4,17 +4,21 @@ import android.os.Bundle;
 import android.support.annotation.NonNull;
 import android.util.Pair;
 
+import org.greenrobot.eventbus.EventBus;
+import org.greenrobot.eventbus.Subscribe;
+import org.greenrobot.eventbus.ThreadMode;
+
 import java.io.File;
 import java.util.List;
 
 import javax.inject.Inject;
 
-import de.greenrobot.event.EventBus;
 import eu.kanade.tachiyomi.data.database.DatabaseHelper;
 import eu.kanade.tachiyomi.data.database.models.Chapter;
 import eu.kanade.tachiyomi.data.database.models.Manga;
 import eu.kanade.tachiyomi.data.database.models.MangaSync;
 import eu.kanade.tachiyomi.data.download.DownloadManager;
+import eu.kanade.tachiyomi.data.download.model.Download;
 import eu.kanade.tachiyomi.data.mangasync.MangaSyncManager;
 import eu.kanade.tachiyomi.data.mangasync.base.MangaSyncService;
 import eu.kanade.tachiyomi.data.preference.PreferencesHelper;
@@ -24,9 +28,9 @@ import eu.kanade.tachiyomi.data.source.model.Page;
 import eu.kanade.tachiyomi.data.sync.UpdateMangaSyncService;
 import eu.kanade.tachiyomi.event.ReaderEvent;
 import eu.kanade.tachiyomi.ui.base.presenter.BasePresenter;
-import eu.kanade.tachiyomi.util.EventBusHook;
 import icepick.State;
 import rx.Observable;
+import rx.Subscription;
 import rx.android.schedulers.AndroidSchedulers;
 import rx.schedulers.Schedulers;
 import rx.subjects.PublishSubject;
@@ -41,72 +45,55 @@ public class ReaderPresenter extends BasePresenter<ReaderActivity> {
     @Inject SourceManager sourceManager;
 
     @State Manga manga;
-    @State Chapter chapter;
+    @State Chapter activeChapter;
     @State int sourceId;
-    @State boolean isDownloaded;
+    @State int requestedPage;
-    @State int currentPage;
+    private Page currentPage;
     private Source source;
     private Chapter nextChapter;
     private Chapter previousChapter;
-    private List<Page> pageList;
-    private List<Page> nextChapterPageList;
     private List<MangaSync> mangaSyncList;
 
     private PublishSubject<Page> retryPageSubject;
+    private PublishSubject<Chapter> pageInitializerSubject;
+
+    private boolean seamlessMode;
+    private Subscription appenderSubscription;
 
     private static final int GET_PAGE_LIST = 1;
-    private static final int GET_PAGE_IMAGES = 2;
+    private static final int GET_ADJACENT_CHAPTERS = 2;
-    private static final int GET_ADJACENT_CHAPTERS = 3;
+    private static final int GET_MANGA_SYNC = 3;
-    private static final int RETRY_IMAGES = 4;
+    private static final int PRELOAD_NEXT_CHAPTER = 4;
-    private static final int PRELOAD_NEXT_CHAPTER = 5;
-    private static final int GET_MANGA_SYNC = 6;
 
     @Override
     protected void onCreate(Bundle savedState) {
         super.onCreate(savedState);
 
         if (savedState != null) {
-            onProcessRestart();
+            source = sourceManager.get(sourceId);
+            initializeSubjects();
         }
 
-        retryPageSubject = PublishSubject.create();
+        seamlessMode = prefs.seamlessMode();
 
-        restartableLatestCache(PRELOAD_NEXT_CHAPTER,
+        startableLatestCache(GET_ADJACENT_CHAPTERS, this::getAdjacentChaptersObservable,
-                this::getPreloadNextChapterObservable,
+                (view, pair) -> view.onAdjacentChapters(pair.first, pair.second));
-                (view, pages) -> {},
-                (view, error) -> Timber.e("An error occurred while preloading a chapter"));
 
-        restartableLatestCache(GET_PAGE_IMAGES,
+        startable(PRELOAD_NEXT_CHAPTER, this::getPreloadNextChapterObservable,
-                this::getPageImagesObservable,
+            next -> {},
-                (view, page) -> {},
+            error -> Timber.e("Error preloading chapter"));
-                (view, error) -> Timber.e("An error occurred while downloading an image"));
 
-        restartableLatestCache(GET_ADJACENT_CHAPTERS,
-                this::getAdjacentChaptersObservable,
-                (view, pair) -> view.onAdjacentChapters(pair.first, pair.second),
-                (view, error) -> Timber.e("An error occurred while getting adjacent chapters"));
 
-        restartableLatestCache(RETRY_IMAGES,
+        restartable(GET_MANGA_SYNC, () -> getMangaSyncObservable().subscribe());
-                this::getRetryPageObservable,
-                (view, page) -> {},
-                (view, error) -> Timber.e("An error occurred while downloading an image"));
 
         restartableLatestCache(GET_PAGE_LIST,
-                () -> getPageListObservable()
+                () -> getPageListObservable(activeChapter),
-                        .doOnNext(pages -> pageList = pages)
+                (view, chapter) -> view.onChapterReady(manga, activeChapter, currentPage),
-                        .doOnCompleted(() -> {
-                            start(GET_ADJACENT_CHAPTERS);
-                            start(GET_PAGE_IMAGES);
-                            start(RETRY_IMAGES);
-                        }),
-                (view, pages) -> view.onChapterReady(pages, manga, chapter, currentPage),
                 (view, error) -> view.onChapterError());
 
-        restartableFirst(GET_MANGA_SYNC, this::getMangaSyncObservable,
+        if (savedState == null) {
-                (view, mangaSync) -> {},
+            registerForEvents();
-                (view, error) -> {});
+        }
-
-        registerForStickyEvents();
     }
 
     @Override
@@ -121,59 +108,85 @@ public class ReaderPresenter extends BasePresenter<ReaderActivity> {
         super.onSave(state);
     }
 
-    private void onProcessRestart() {
+    @Subscribe(sticky = true, threadMode = ThreadMode.MAIN)
-        source = sourceManager.get(sourceId);
+    public void onEvent(ReaderEvent event) {
-
-        // These are started by GET_PAGE_LIST, so we don't let them restart itselves
-        stop(GET_PAGE_IMAGES);
-        stop(GET_ADJACENT_CHAPTERS);
-        stop(RETRY_IMAGES);
-        stop(PRELOAD_NEXT_CHAPTER);
-    }
-
-    @EventBusHook
-    public void onEventMainThread(ReaderEvent event) {
         EventBus.getDefault().removeStickyEvent(event);
         manga = event.getManga();
         source = event.getSource();
         sourceId = source.getId();
+        initializeSubjects();
         loadChapter(event.getChapter());
         if (prefs.autoUpdateMangaSync()) {
             start(GET_MANGA_SYNC);
         }
     }
 
+    private void initializeSubjects() {
+        // Listen for pages initialization events
+        pageInitializerSubject = PublishSubject.create();
+        add(pageInitializerSubject
+                .observeOn(Schedulers.io())
+                .concatMap(chapter -> {
+                    Observable observable;
+                    if (chapter.isDownloaded()) {
+                        File chapterDir = downloadManager.getAbsoluteChapterDirectory(source, manga, chapter);
+                        observable = Observable.from(chapter.getPages())
+                                .flatMap(page -> downloadManager.getDownloadedImage(page, chapterDir));
+                    } else {
+                        observable = source.getAllImageUrlsFromPageList(chapter.getPages())
+                                .flatMap(source::getCachedImage, 2)
+                                .doOnCompleted(() -> source.savePageList(chapter.url, chapter.getPages()));
+                    }
+                    return observable.doOnCompleted(() -> {
+                        if (!seamlessMode && activeChapter == chapter) {
+                            preloadNextChapter();
+                        }
+                    });
+                })
+                .subscribe());
+
+        // Listen por retry events
+        retryPageSubject = PublishSubject.create();
+        add(retryPageSubject
+                .observeOn(Schedulers.io())
+                .flatMap(page -> page.getImageUrl() == null ?
+                        source.getImageUrlFromPage(page) :
+                        Observable.just(page))
+                .flatMap(source::getCachedImage)
+                .subscribe());
+    }
+
     // Returns the page list of a chapter
-    private Observable<List<Page>> getPageListObservable() {
+    private Observable<Chapter> getPageListObservable(Chapter chapter) {
-        return isDownloaded ?
+        return (chapter.isDownloaded() ?
                 // Fetch the page list from disk
                 Observable.just(downloadManager.getSavedPageList(source, manga, chapter)) :
                 // Fetch the page list from cache or fallback to network
                 source.getCachedPageListOrPullFromNetwork(chapter.url)
                         .subscribeOn(Schedulers.io())
-                        .observeOn(AndroidSchedulers.mainThread());
+                        .observeOn(AndroidSchedulers.mainThread())
-    }
+        ).map(pages -> {
-
+            for (Page page : pages) {
-    // Get the chapter images from network or disk
+                page.setChapter(chapter);
-    private Observable<Page> getPageImagesObservable() {
+            }
-        Observable<Page> pageObservable;
+            chapter.setPages(pages);
-
+            if (requestedPage >= -1 || currentPage == null) {
-        if (!isDownloaded) {
+                if (requestedPage == -1) {
-            pageObservable = source.getAllImageUrlsFromPageList(pageList)
+                    currentPage = pages.get(pages.size() - 1);
-                    .flatMap(source::getCachedImage, 2);
+                } else {
-        } else {
+                    currentPage = pages.get(requestedPage);
-            File chapterDir = downloadManager.getAbsoluteChapterDirectory(source, manga, chapter);
+                }
-            pageObservable = Observable.from(pageList)
+            }
-                    .flatMap(page -> downloadManager.getDownloadedImage(page, chapterDir));
+            requestedPage = -2;
-        }
+            pageInitializerSubject.onNext(chapter);
-        return pageObservable.subscribeOn(Schedulers.io())
+            return chapter;
-                .doOnCompleted(this::preloadNextChapter);
+        });
     }
 
     private Observable<Pair<Chapter, Chapter>> getAdjacentChaptersObservable() {
         return Observable.zip(
-                db.getPreviousChapter(chapter).asRxObservable().take(1),
+                db.getPreviousChapter(activeChapter).asRxObservable().take(1),
-                db.getNextChapter(chapter).asRxObservable().take(1),
+                db.getNextChapter(activeChapter).asRxObservable().take(1),
                 Pair::create)
                 .doOnNext(pair -> {
                     previousChapter = pair.first;
@@ -182,29 +195,22 @@ public class ReaderPresenter extends BasePresenter<ReaderActivity> {
                 .observeOn(AndroidSchedulers.mainThread());
     }
 
-    // Listen for retry page events
+    // Preload the first pages of the next chapter. Only for non seamless mode
-    private Observable<Page> getRetryPageObservable() {
-        return retryPageSubject
-                .observeOn(Schedulers.io())
-                .flatMap(page -> page.getImageUrl() == null ?
-                        source.getImageUrlFromPage(page) :
-                        Observable.just(page))
-                .flatMap(source::getCachedImage)
-                .observeOn(AndroidSchedulers.mainThread());
-    }
-
-    // Preload the first pages of the next chapter
     private Observable<Page> getPreloadNextChapterObservable() {
         return source.getCachedPageListOrPullFromNetwork(nextChapter.url)
                 .flatMap(pages -> {
-                    nextChapterPageList = pages;
+                    nextChapter.setPages(pages);
-                    // Preload at most 5 pages
                     int pagesToPreload = Math.min(pages.size(), 5);
                     return Observable.from(pages).take(pagesToPreload);
                 })
+                // Preload up to 5 images
                 .concatMap(page -> page.getImageUrl() == null ?
                         source.getImageUrlFromPage(page) :
                         Observable.just(page))
+                // Download the first image
+                .concatMap(page -> page.getPageNumber() == 0 ?
+                        source.getCachedImage(page) :
+                        Observable.just(page))
                 .subscribeOn(Schedulers.io())
                 .observeOn(AndroidSchedulers.mainThread())
                 .doOnCompleted(this::stopPreloadingNextChapter);
@@ -212,29 +218,68 @@ public class ReaderPresenter extends BasePresenter<ReaderActivity> {
 
     private Observable<List<MangaSync>> getMangaSyncObservable() {
         return db.getMangasSync(manga).asRxObservable()
+                .take(1)
                 .doOnNext(mangaSync -> this.mangaSyncList = mangaSync);
     }
 
-    // Loads the given chapter
     private void loadChapter(Chapter chapter) {
-        // Before loading the chapter, stop preloading (if it's working) and save current progress
+        loadChapter(chapter, 0);
-        stopPreloadingNextChapter();
+    }
 
-        this.chapter = chapter;
+    // Loads the given chapter
-        isDownloaded = isChapterDownloaded(chapter);
+    private void loadChapter(Chapter chapter, int requestedPage) {
+        if (seamlessMode) {
+            if (appenderSubscription != null)
+                remove(appenderSubscription);
+        } else {
+            stopPreloadingNextChapter();
+        }
+
+        this.activeChapter = chapter;
+        chapter.status = isChapterDownloaded(chapter) ? Download.DOWNLOADED : Download.NOT_DOWNLOADED;
 
         // If the chapter is partially read, set the starting page to the last the user read
         if (!chapter.read && chapter.last_page_read != 0)
-            currentPage = chapter.last_page_read;
+            this.requestedPage = chapter.last_page_read;
         else
-            currentPage = 0;
+            this.requestedPage = requestedPage;
 
         // Reset next and previous chapter. They have to be fetched again
         nextChapter = null;
         previousChapter = null;
-        nextChapterPageList = null;
 
         start(GET_PAGE_LIST);
+        start(GET_ADJACENT_CHAPTERS);
+    }
+
+    public void setActiveChapter(Chapter chapter) {
+        onChapterLeft();
+        this.activeChapter = chapter;
+        nextChapter = null;
+        previousChapter = null;
+        start(GET_ADJACENT_CHAPTERS);
+    }
+
+    public void appendNextChapter() {
+        if (nextChapter == null)
+            return;
+
+        if (appenderSubscription != null)
+            remove(appenderSubscription);
+
+        nextChapter.status = isChapterDownloaded(nextChapter) ? Download.DOWNLOADED : Download.NOT_DOWNLOADED;
+
+        appenderSubscription = getPageListObservable(nextChapter)
+                .subscribeOn(Schedulers.io())
+                .observeOn(AndroidSchedulers.mainThread())
+                .compose(deliverLatestCache())
+                .subscribe(split((view, chapter) -> {
+                    view.onAppendChapter(chapter);
+                }, (view, error) -> {
+                    view.onChapterAppendError();
+                }));
+
+        add(appenderSubscription);
     }
 
     // Check whether the given chapter is downloaded
@@ -250,34 +295,39 @@ public class ReaderPresenter extends BasePresenter<ReaderActivity> {
     // Called before loading another chapter or leaving the reader. It allows to do operations
     // over the chapter read like saving progress
     public void onChapterLeft() {
-        if (pageList == null)
+        List<Page> pages = activeChapter.getPages();
+        if (pages == null)
             return;
 
+        // Get the last page read
+        int activePageNumber = activeChapter.last_page_read;
+
+        // Just in case, avoid out of index exceptions
+        if (activePageNumber >= pages.size()) {
+            activePageNumber = pages.size() - 1;
+        }
+        Page activePage = pages.get(activePageNumber);
+
         // Cache current page list progress for online chapters to allow a faster reopen
-        if (!isDownloaded)
+        if (!activeChapter.isDownloaded()) {
-            source.savePageList(chapter.url, pageList);
+            source.savePageList(activeChapter.url, pages);
+        }
 
         // Save current progress of the chapter. Mark as read if the chapter is finished
-        chapter.last_page_read = currentPage;
+        if (activePage.isLastPage()) {
-        if (isChapterFinished()) {
+            activeChapter.read = true;
-            chapter.read = true;
         }
-        db.insertChapter(chapter).asRxObservable().subscribe();
+        db.insertChapter(activeChapter).asRxObservable().subscribe();
-    }
-
-    // Check whether the chapter has been read
-    private boolean isChapterFinished() {
-        return !chapter.read && currentPage == pageList.size() - 1;
     }
 
     public int getMangaSyncChapterToUpdate() {
-        if (pageList == null || mangaSyncList == null || mangaSyncList.isEmpty())
+        if (activeChapter.getPages() == null || mangaSyncList == null || mangaSyncList.isEmpty())
             return 0;
 
         int lastChapterReadLocal = 0;
         // If the current chapter has been read, we check with this one
-        if (chapter.read)
+        if (activeChapter.read)
-            lastChapterReadLocal = (int) Math.floor(chapter.chapter_number);
+            lastChapterReadLocal = (int) Math.floor(activeChapter.chapter_number);
         // If not, we check if the previous chapter has been read
         else if (previousChapter != null && previousChapter.read)
             lastChapterReadLocal = (int) Math.floor(previousChapter.chapter_number);
@@ -305,14 +355,14 @@ public class ReaderPresenter extends BasePresenter<ReaderActivity> {
         }
     }
 
-    public void setCurrentPage(int currentPage) {
+    public void setCurrentPage(Page currentPage) {
         this.currentPage = currentPage;
     }
 
     public boolean loadNextChapter() {
         if (hasNextChapter()) {
             onChapterLeft();
-            loadChapter(nextChapter);
+            loadChapter(nextChapter, 0);
             return true;
         }
         return false;
@@ -321,7 +371,7 @@ public class ReaderPresenter extends BasePresenter<ReaderActivity> {
     public boolean loadPreviousChapter() {
         if (hasPreviousChapter()) {
             onChapterLeft();
-            loadChapter(previousChapter);
+            loadChapter(previousChapter, -1);
             return true;
         }
         return false;
@@ -342,10 +392,10 @@ public class ReaderPresenter extends BasePresenter<ReaderActivity> {
     }
 
     private void stopPreloadingNextChapter() {
-        if (isSubscribed(PRELOAD_NEXT_CHAPTER)) {
+        if (!isUnsubscribed(PRELOAD_NEXT_CHAPTER)) {
             stop(PRELOAD_NEXT_CHAPTER);
-            if (nextChapterPageList != null)
+            if (nextChapter.getPages() != null)
-                source.savePageList(nextChapter.url, nextChapterPageList);
+                source.savePageList(nextChapter.url, nextChapter.getPages());
         }
     }
 
@@ -358,4 +408,11 @@ public class ReaderPresenter extends BasePresenter<ReaderActivity> {
         return manga;
     }
 
+    public Page getCurrentPage() {
+        return currentPage;
+    }
+
+    public boolean isSeamlessMode() {
+        return seamlessMode;
+    }
 }

app/src/main/java/eu/kanade/tachiyomi/ui/reader/viewer/base/BaseReader.java

@@ -1,13 +1,15 @@
 package eu.kanade.tachiyomi.ui.reader.viewer.base;
 
-import android.view.MotionEvent;
+import com.davemorrissey.labs.subscaleview.decoder.ImageDecoder;
-
 import com.davemorrissey.labs.subscaleview.decoder.ImageRegionDecoder;
 import com.davemorrissey.labs.subscaleview.decoder.RapidImageRegionDecoder;
+import com.davemorrissey.labs.subscaleview.decoder.SkiaImageDecoder;
 import com.davemorrissey.labs.subscaleview.decoder.SkiaImageRegionDecoder;
 
+import java.util.ArrayList;
 import java.util.List;
 
+import eu.kanade.tachiyomi.data.database.models.Chapter;
 import eu.kanade.tachiyomi.data.source.model.Page;
 import eu.kanade.tachiyomi.ui.base.fragment.BaseFragment;
 import eu.kanade.tachiyomi.ui.reader.ReaderActivity;
@@ -16,48 +18,100 @@ public abstract class BaseReader extends BaseFragment {
 
     protected int currentPage;
     protected List<Page> pages;
+    protected List<Chapter> chapters;
     protected Class<? extends ImageRegionDecoder> regionDecoderClass;
+    protected Class<? extends ImageDecoder> bitmapDecoderClass;
+
+    private boolean hasRequestedNextChapter;
 
     public static final int RAPID_DECODER = 0;
     public static final int SKIA_DECODER = 1;
 
     public void updatePageNumber() {
-        getReaderActivity().onPageChanged(getCurrentPage(), getTotalPages());
+        getReaderActivity().onPageChanged(getCurrentPage().getPageNumber(), getCurrentPage().getChapter().getPages().size());
     }
 
-    public int getCurrentPage() {
+    public Page getCurrentPage() {
-        return currentPage;
+        return pages.get(currentPage);
-    }
-
-    public int getPageForPosition(int position) {
-        return position;
-    }
-
-    public int getPositionForPage(int page) {
-        return page;
     }
 
     public void onPageChanged(int position) {
-        currentPage = getPageForPosition(position);
+        Page oldPage = pages.get(currentPage);
+        Page newPage = pages.get(position);
+        newPage.getChapter().last_page_read = newPage.getPageNumber();
+
+        if (getReaderActivity().getPresenter().isSeamlessMode()) {
+            Chapter oldChapter = oldPage.getChapter();
+            Chapter newChapter = newPage.getChapter();
+            if (!hasRequestedNextChapter && position > pages.size() - 5) {
+                hasRequestedNextChapter = true;
+                getReaderActivity().getPresenter().appendNextChapter();
+            }
+            if (!oldChapter.id.equals(newChapter.id)) {
+                onChapterChanged(newPage.getChapter(), newPage);
+            }
+        }
+        currentPage = position;
         updatePageNumber();
     }
 
-    public int getTotalPages() {
+    private void onChapterChanged(Chapter chapter, Page currentPage) {
-        return pages == null ? 0 : pages.size();
+        getReaderActivity().onEnterChapter(chapter, currentPage.getPageNumber());
+    }
+
+    public void setSelectedPage(Page page) {
+        setSelectedPage(getPageIndex(page));
+    }
+
+    public int getPageIndex(Page search) {
+        // search for the index of a page in the current list without requiring them to be the same object
+        for (Page page : pages) {
+            if (page.getPageNumber() == search.getPageNumber() &&
+                    page.getChapter().id.equals(search.getChapter().id)) {
+                return pages.indexOf(page);
+            }
+        }
+        return 0;
+    }
+
+    public void onPageListReady(Chapter chapter, Page currentPage) {
+        if (chapters == null || !chapters.contains(chapter)) {
+            // if we reset the loaded page we also need to reset the loaded chapters
+            chapters = new ArrayList<>();
+            chapters.add(chapter);
+            onSetChapter(chapter, currentPage);
+        } else {
+            setSelectedPage(currentPage);
+        }
+    }
+
+    public void onPageListAppendReady(Chapter chapter) {
+        if (!chapters.contains(chapter)) {
+            hasRequestedNextChapter = false;
+            chapters.add(chapter);
+            onAppendChapter(chapter);
+        }
     }
 
     public abstract void setSelectedPage(int pageNumber);
-    public abstract void onPageListReady(List<Page> pages, int currentPage);
+    public abstract void onSetChapter(Chapter chapter, Page currentPage);
-    public abstract boolean onImageTouch(MotionEvent motionEvent);
+    public abstract void onAppendChapter(Chapter chapter);
+    public abstract void moveToNext();
+    public abstract void moveToPrevious();
 
-    public void setRegionDecoderClass(int value) {
+    public void setDecoderClass(int value) {
         switch (value) {
             case RAPID_DECODER:
             default:
                 regionDecoderClass = RapidImageRegionDecoder.class;
+                bitmapDecoderClass = SkiaImageDecoder.class;
+                // Using Skia because Rapid isn't stable. Rapid is still used for region decoding.
+                // https://github.com/inorichi/tachiyomi/issues/97
+                //bitmapDecoderClass = RapidImageDecoder.class;
                 break;
             case SKIA_DECODER:
                 regionDecoderClass = SkiaImageRegionDecoder.class;
+                bitmapDecoderClass = SkiaImageDecoder.class;
                 break;
         }
     }
@@ -66,6 +120,10 @@ public abstract class BaseReader extends BaseFragment {
         return regionDecoderClass;
     }
 
+    public Class<? extends ImageDecoder> getBitmapDecoderClass() {
+        return bitmapDecoderClass;
+    }
+
     public ReaderActivity getReaderActivity() {
         return (ReaderActivity) getActivity();
     }

app/src/main/java/eu/kanade/tachiyomi/ui/reader/viewer/base/OnChapterSingleTapListener.java

@@ -1,7 +0,0 @@
-package eu.kanade.tachiyomi.ui.reader.viewer.base;
-
-public interface OnChapterSingleTapListener {
-    void onCenterTap();
-    void onLeftSideTap();
-    void onRightSideTap();
-}

app/src/main/java/eu/kanade/tachiyomi/ui/reader/viewer/pager/OnChapterBoundariesOutListener.java

@@ -1,4 +1,4 @@
-package eu.kanade.tachiyomi.ui.reader.viewer.base;
+package eu.kanade.tachiyomi.ui.reader.viewer.pager;
 
 public interface OnChapterBoundariesOutListener {
     void onFirstPageOutEvent();

app/src/main/java/eu/kanade/tachiyomi/ui/reader/viewer/pager/Pager.java

@@ -1,11 +1,8 @@
 package eu.kanade.tachiyomi.ui.reader.viewer.pager;
 
 import android.support.v4.view.PagerAdapter;
-import android.view.MotionEvent;
 import android.view.ViewGroup;
 
-import eu.kanade.tachiyomi.ui.reader.viewer.base.OnChapterBoundariesOutListener;
-import eu.kanade.tachiyomi.ui.reader.viewer.base.OnChapterSingleTapListener;
 import rx.functions.Action1;
 
 public interface Pager {
@@ -24,13 +21,7 @@ public interface Pager {
     PagerAdapter getAdapter();
     void setAdapter(PagerAdapter adapter);
 
-    boolean onImageTouch(MotionEvent motionEvent);
-
     void setOnChapterBoundariesOutListener(OnChapterBoundariesOutListener listener);
-    void setOnChapterSingleTapListener(OnChapterSingleTapListener listener);
-
-    OnChapterBoundariesOutListener getChapterBoundariesListener();
-    OnChapterSingleTapListener getChapterSingleTapListener();
 
     void setOnPageChangeListener(Action1<Integer> onPageChanged);
     void clearOnPageChangeListeners();

app/src/main/java/eu/kanade/tachiyomi/ui/reader/viewer/pager/PagerGestureListener.java

@@ -1,71 +0,0 @@
-package eu.kanade.tachiyomi.ui.reader.viewer.pager;
-
-import android.view.GestureDetector;
-import android.view.MotionEvent;
-
-public class PagerGestureListener extends GestureDetector.SimpleOnGestureListener {
-
-    private Pager pager;
-
-    private static final float LEFT_REGION = 0.33f;
-    private static final float RIGHT_REGION = 0.66f;
-
-    public PagerGestureListener(Pager pager) {
-        this.pager = pager;
-    }
-
-    @Override
-    public boolean onSingleTapConfirmed(MotionEvent e) {
-        final int position = pager.getCurrentItem();
-        final float positionX = e.getX();
-
-        if (positionX < pager.getWidth() * LEFT_REGION) {
-            if (position != 0) {
-                onLeftSideTap();
-            } else {
-                onFirstPageOut();
-            }
-        } else if (positionX > pager.getWidth() * RIGHT_REGION) {
-            if (position != pager.getAdapter().getCount() - 1) {
-                onRightSideTap();
-            } else {
-                onLastPageOut();
-            }
-        } else {
-            onCenterTap();
-        }
-
-        return true;
-    }
-
-    private void onLeftSideTap() {
-        if (pager.getChapterSingleTapListener() != null) {
-            pager.getChapterSingleTapListener().onLeftSideTap();
-        }
-    }
-
-    private void onRightSideTap() {
-        if (pager.getChapterSingleTapListener() != null) {
-            pager.getChapterSingleTapListener().onRightSideTap();
-        }
-    }
-
-    private void onCenterTap() {
-        if (pager.getChapterSingleTapListener() != null) {
-            pager.getChapterSingleTapListener().onCenterTap();
-        }
-    }
-
-    private void onFirstPageOut() {
-        if (pager.getChapterBoundariesListener() != null) {
-            pager.getChapterBoundariesListener().onFirstPageOutEvent();
-        }
-    }
-
-    private void onLastPageOut() {
-        if (pager.getChapterBoundariesListener() != null) {
-            pager.getChapterBoundariesListener().onLastPageOutEvent();
-        }
-    }
-
-}

app/src/main/java/eu/kanade/tachiyomi/ui/reader/viewer/pager/PagerReader.java

@@ -1,15 +1,18 @@
 package eu.kanade.tachiyomi.ui.reader.viewer.pager;
 
+import android.view.GestureDetector;
 import android.view.MotionEvent;
 import android.view.ViewGroup;
 
-import java.util.List;
+import java.util.ArrayList;
 
 import eu.kanade.tachiyomi.R;
+import eu.kanade.tachiyomi.data.database.models.Chapter;
+import eu.kanade.tachiyomi.data.preference.PreferencesHelper;
 import eu.kanade.tachiyomi.data.source.model.Page;
 import eu.kanade.tachiyomi.ui.reader.viewer.base.BaseReader;
-import eu.kanade.tachiyomi.ui.reader.viewer.base.OnChapterBoundariesOutListener;
+import eu.kanade.tachiyomi.ui.reader.viewer.pager.horizontal.LeftToRightReader;
-import eu.kanade.tachiyomi.ui.reader.viewer.base.OnChapterSingleTapListener;
+import eu.kanade.tachiyomi.ui.reader.viewer.pager.horizontal.RightToLeftReader;
 import rx.subscriptions.CompositeSubscription;
 
 import static android.view.ViewGroup.LayoutParams.MATCH_PARENT;
@@ -18,10 +21,22 @@ public abstract class PagerReader extends BaseReader {
 
     protected PagerReaderAdapter adapter;
     protected Pager pager;
+    protected GestureDetector gestureDetector;
 
     protected boolean transitions;
     protected CompositeSubscription subscriptions;
 
+    protected int scaleType = 1;
+    protected int zoomStart = 1;
+
+    public static final int ALIGN_AUTO = 1;
+    public static final int ALIGN_LEFT = 2;
+    public static final int ALIGN_RIGHT = 3;
+    public static final int ALIGN_CENTER = 4;
+
+    private static final float LEFT_REGION = 0.33f;
+    private static final float RIGHT_REGION = 0.66f;
+
     protected void initializePager(Pager pager) {
         this.pager = pager;
         pager.setLayoutParams(new ViewGroup.LayoutParams(MATCH_PARENT, MATCH_PARENT));
@@ -30,43 +45,43 @@ public abstract class PagerReader extends BaseReader {
         pager.setOnChapterBoundariesOutListener(new OnChapterBoundariesOutListener() {
             @Override
             public void onFirstPageOutEvent() {
-                onFirstPageOut();
+                getReaderActivity().requestPreviousChapter();
             }
 
             @Override
             public void onLastPageOutEvent() {
-                onLastPageOut();
+                getReaderActivity().requestNextChapter();
-            }
-        });
-        pager.setOnChapterSingleTapListener(new OnChapterSingleTapListener() {
-            @Override
-            public void onCenterTap() {
-                getReaderActivity().onCenterSingleTap();
-            }
-
-            @Override
-            public void onLeftSideTap() {
-                pager.setCurrentItem(pager.getCurrentItem() - 1, transitions);
-            }
-
-            @Override
-            public void onRightSideTap() {
-                pager.setCurrentItem(pager.getCurrentItem() + 1, transitions);
             }
         });
+        gestureDetector = createGestureDetector();
 
         adapter = new PagerReaderAdapter(getChildFragmentManager());
         pager.setAdapter(adapter);
 
+        PreferencesHelper preferences = getReaderActivity().getPreferences();
         subscriptions = new CompositeSubscription();
-        subscriptions.add(getReaderActivity().getPreferences().imageDecoder()
+        subscriptions.add(preferences.imageDecoder()
                 .asObservable()
-                .doOnNext(this::setRegionDecoderClass)
+                .doOnNext(this::setDecoderClass)
                 .skip(1)
                 .distinctUntilChanged()
-                .subscribe(v -> adapter.notifyDataSetChanged()));
+                .subscribe(v -> pager.setAdapter(adapter)));
 
-        subscriptions.add(getReaderActivity().getPreferences().enableTransitions()
+        subscriptions.add(preferences.imageScaleType()
+                .asObservable()
+                .doOnNext(this::setImageScaleType)
+                .skip(1)
+                .distinctUntilChanged()
+                .subscribe(v -> pager.setAdapter(adapter)));
+
+        subscriptions.add(preferences.zoomStart()
+                .asObservable()
+                .doOnNext(this::setZoomStart)
+                .skip(1)
+                .distinctUntilChanged()
+                .subscribe(v -> pager.setAdapter(adapter)));
+
+        subscriptions.add(preferences.enableTransitions()
                 .asObservable()
                 .subscribe(value -> transitions = value));
 
@@ -79,14 +94,41 @@ public abstract class PagerReader extends BaseReader {
         super.onDestroyView();
     }
 
-    @Override
+    protected GestureDetector createGestureDetector() {
-    public void onPageListReady(List<Page> pages, int currentPage) {
+        return new GestureDetector(getContext(), new GestureDetector.SimpleOnGestureListener() {
-        if (this.pages != pages) {
+            @Override
-            this.pages = pages;
+            public boolean onSingleTapConfirmed(MotionEvent e) {
-            this.currentPage = currentPage;
+                final float positionX = e.getX();
-            if (isResumed()) {
+
-                setPages();
+                if (positionX < pager.getWidth() * LEFT_REGION) {
+                    onLeftSideTap();
+                } else if (positionX > pager.getWidth() * RIGHT_REGION) {
+                    onRightSideTap();
+                } else {
+                    getReaderActivity().onCenterSingleTap();
+                }
+                return true;
             }
+        });
+    }
+
+    @Override
+    public void onSetChapter(Chapter chapter, Page currentPage) {
+        pages = new ArrayList<>(chapter.getPages());
+        this.currentPage = getPageIndex(currentPage); // we might have a new page object
+
+        // This method can be called before the view is created
+        if (pager != null) {
+            setPages();
+        }
+    }
+
+    public void onAppendChapter(Chapter chapter) {
+        pages.addAll(chapter.getPages());
+
+        // This method can be called before the view is created
+        if (pager != null) {
+            adapter.setPages(pages);
         }
     }
 
@@ -102,15 +144,48 @@ public abstract class PagerReader extends BaseReader {
 
     @Override
     public void setSelectedPage(int pageNumber) {
-        pager.setCurrentItem(getPositionForPage(pageNumber), false);
+        pager.setCurrentItem(pageNumber, false);
     }
 
-    @Override
+    protected void onLeftSideTap() {
-    public boolean onImageTouch(MotionEvent motionEvent) {
+        moveToPrevious();
-        return pager.onImageTouch(motionEvent);
     }
 
-    public abstract void onFirstPageOut();
+    protected void onRightSideTap() {
-    public abstract void onLastPageOut();
+        moveToNext();
+    }
+
+    public void moveToNext() {
+        if (pager.getCurrentItem() != pager.getAdapter().getCount() - 1) {
+            pager.setCurrentItem(pager.getCurrentItem() + 1, transitions);
+        } else {
+            getReaderActivity().requestNextChapter();
+        }
+    }
+
+    public void moveToPrevious() {
+        if (pager.getCurrentItem() != 0) {
+            pager.setCurrentItem(pager.getCurrentItem() - 1, transitions);
+        } else {
+            getReaderActivity().requestPreviousChapter();
+        }
+    }
+
+    private void setImageScaleType(int scaleType) {
+        this.scaleType = scaleType;
+    }
+
+    private void setZoomStart(int zoomStart) {
+        if (zoomStart == ALIGN_AUTO) {
+            if (this instanceof LeftToRightReader)
+                setZoomStart(ALIGN_LEFT);
+            else if (this instanceof RightToLeftReader)
+                setZoomStart(ALIGN_RIGHT);
+            else
+                setZoomStart(ALIGN_CENTER);
+        } else {
+            this.zoomStart = zoomStart;
+        }
+    }
 
 }

app/src/main/java/eu/kanade/tachiyomi/ui/reader/viewer/pager/PagerReaderAdapter.java

@@ -3,6 +3,7 @@ package eu.kanade.tachiyomi.ui.reader.viewer.pager;
 import android.support.v4.app.Fragment;
 import android.support.v4.app.FragmentManager;
 import android.support.v4.app.FragmentStatePagerAdapter;
+import android.view.ViewGroup;
 
 import java.util.List;
 
@@ -23,7 +24,15 @@ public class PagerReaderAdapter extends FragmentStatePagerAdapter {
 
     @Override
     public Fragment getItem(int position) {
-        return PagerReaderFragment.newInstance(pages.get(position));
+        return PagerReaderFragment.newInstance();
+    }
+
+    @Override
+    public Object instantiateItem(ViewGroup container, int position) {
+        PagerReaderFragment f = (PagerReaderFragment) super.instantiateItem(container, position);
+        f.setPage(pages.get(position));
+        f.setPosition(position);
+        return f;
     }
 
     public List<Page> getPages() {
@@ -37,7 +46,15 @@ public class PagerReaderAdapter extends FragmentStatePagerAdapter {
 
     @Override
     public int getItemPosition(Object object) {
-        return POSITION_NONE;
+        PagerReaderFragment f = (PagerReaderFragment) object;
+        int position = f.getPosition();
+        if (position >= 0 && position < getCount()) {
+            if (pages.get(position) == f.getPage()) {
+                return POSITION_UNCHANGED;
+            } else {
+                return POSITION_NONE;
+            }
+        }
+        return super.getItemPosition(object);
     }
-
 }

app/src/main/java/eu/kanade/tachiyomi/ui/reader/viewer/pager/PagerReaderFragment.java

@@ -1,5 +1,6 @@
 package eu.kanade.tachiyomi.ui.reader.viewer.pager;
 
+import android.graphics.PointF;
 import android.os.Bundle;
 import android.support.annotation.Nullable;
 import android.support.v4.content.ContextCompat;
@@ -16,6 +17,7 @@ import android.widget.TextView;
 import com.davemorrissey.labs.subscaleview.ImageSource;
 import com.davemorrissey.labs.subscaleview.SubsamplingScaleImageView;
 
+import java.io.File;
 import java.util.concurrent.TimeUnit;
 import java.util.concurrent.atomic.AtomicInteger;
 
@@ -25,7 +27,8 @@ import eu.kanade.tachiyomi.R;
 import eu.kanade.tachiyomi.data.source.model.Page;
 import eu.kanade.tachiyomi.ui.base.fragment.BaseFragment;
 import eu.kanade.tachiyomi.ui.reader.ReaderActivity;
-import eu.kanade.tachiyomi.ui.reader.viewer.base.BaseReader;
+import eu.kanade.tachiyomi.ui.reader.viewer.pager.horizontal.RightToLeftReader;
+import eu.kanade.tachiyomi.ui.reader.viewer.pager.vertical.VerticalReader;
 import rx.Observable;
 import rx.Subscription;
 import rx.android.schedulers.AndroidSchedulers;
@@ -43,11 +46,13 @@ public class PagerReaderFragment extends BaseFragment {
     private Page page;
     private Subscription progressSubscription;
     private Subscription statusSubscription;
+    private int position = -1;
 
-    public static PagerReaderFragment newInstance(Page page) {
+    private int lightGreyColor;
-        PagerReaderFragment fragment = new PagerReaderFragment();
+    private int blackColor;
-        fragment.setPage(page);
+
-        return fragment;
+    public static PagerReaderFragment newInstance() {
+        return new PagerReaderFragment();
     }
 
     @Override
@@ -55,20 +60,47 @@ public class PagerReaderFragment extends BaseFragment {
         View view = inflater.inflate(R.layout.item_pager_reader, container, false);
         ButterKnife.bind(this, view);
         ReaderActivity activity = getReaderActivity();
-        BaseReader parentFragment = (BaseReader) getParentFragment();
+        PagerReader parentFragment = (PagerReader) getParentFragment();
+
+        lightGreyColor = ContextCompat.getColor(getContext(), R.color.light_grey);
+        blackColor = ContextCompat.getColor(getContext(), R.color.primary_text);
 
         if (activity.getReaderTheme() == ReaderActivity.BLACK_THEME) {
-             progressText.setTextColor(ContextCompat.getColor(getContext(), R.color.light_grey));
+             progressText.setTextColor(lightGreyColor);
+        }
+
+        if (parentFragment instanceof RightToLeftReader) {
+            view.setRotation(-180);
         }
 
         imageView.setParallelLoadingEnabled(true);
-        imageView.setMaxDimensions(activity.getMaxBitmapSize(), activity.getMaxBitmapSize());
+        imageView.setMaxBitmapDimensions(activity.getMaxBitmapSize());
         imageView.setDoubleTapZoomStyle(SubsamplingScaleImageView.ZOOM_FOCUS_FIXED);
         imageView.setPanLimit(SubsamplingScaleImageView.PAN_LIMIT_INSIDE);
-        imageView.setMinimumScaleType(SubsamplingScaleImageView.SCALE_TYPE_CENTER_INSIDE);
+        imageView.setMinimumScaleType(parentFragment.scaleType);
+        imageView.setMinimumDpi(50);
         imageView.setRegionDecoderClass(parentFragment.getRegionDecoderClass());
-        imageView.setOnTouchListener((v, motionEvent) -> parentFragment.onImageTouch(motionEvent));
+        imageView.setBitmapDecoderClass(parentFragment.getBitmapDecoderClass());
+        imageView.setVerticalScrollingParent(parentFragment instanceof VerticalReader);
+        imageView.setOnTouchListener((v, motionEvent) -> parentFragment.gestureDetector.onTouchEvent(motionEvent));
         imageView.setOnImageEventListener(new SubsamplingScaleImageView.DefaultOnImageEventListener() {
+            @Override
+            public void onReady() {
+                switch (parentFragment.zoomStart) {
+                    case PagerReader.ALIGN_LEFT:
+                        imageView.setScaleAndCenter(imageView.getScale(), new PointF(0, 0));
+                        break;
+                    case PagerReader.ALIGN_RIGHT:
+                        imageView.setScaleAndCenter(imageView.getScale(), new PointF(imageView.getSWidth(), 0));
+                        break;
+                    case PagerReader.ALIGN_CENTER:
+                        PointF center = imageView.getCenter();
+                        center.y = 0;
+                        imageView.setScaleAndCenter(imageView.getScale(), center);
+                        break;
+                }
+            }
+
             @Override
             public void onImageLoadError(Exception e) {
                 showImageLoadError();
@@ -91,20 +123,36 @@ public class PagerReaderFragment extends BaseFragment {
     public void onDestroyView() {
         unsubscribeProgress();
         unsubscribeStatus();
+        imageView.setOnTouchListener(null);
+        imageView.setOnImageEventListener(null);
         ButterKnife.unbind(this);
         super.onDestroyView();
     }
 
     public void setPage(Page page) {
         this.page = page;
+
+        // This method can be called before the view is created
+        if (imageView != null) {
+            observeStatus();
+        }
+    }
+
+    public void setPosition(int position) {
+        this.position = position;
     }
 
     private void showImage() {
         if (page == null || page.getImagePath() == null)
             return;
 
-        imageView.setImage(ImageSource.uri(page.getImagePath()));
+        File imagePath = new File(page.getImagePath());
-        progressContainer.setVisibility(View.GONE);
+        if (imagePath.exists()) {
+            imageView.setImage(ImageSource.uri(page.getImagePath()));
+            progressContainer.setVisibility(View.GONE);
+        } else {
+            page.setStatus(Page.ERROR);
+        }
     }
 
     private void showDownloading() {
@@ -136,8 +184,7 @@ public class PagerReaderFragment extends BaseFragment {
         errorText.setGravity(Gravity.CENTER);
         errorText.setText(R.string.decode_image_error);
         errorText.setTextColor(getReaderActivity().getReaderTheme() == ReaderActivity.BLACK_THEME ?
-                    ContextCompat.getColor(getContext(), R.color.light_grey) :
+                    lightGreyColor : blackColor);
-                    ContextCompat.getColor(getContext(), R.color.primary_text));
 
         view.addView(errorText);
     }
@@ -157,7 +204,6 @@ public class PagerReaderFragment extends BaseFragment {
             case Page.READY:
                 showImage();
                 unsubscribeProgress();
-                unsubscribeStatus();
                 break;
             case Page.ERROR:
                 showError();
@@ -185,8 +231,8 @@ public class PagerReaderFragment extends BaseFragment {
 
         final AtomicInteger currentValue = new AtomicInteger(-1);
 
-        progressSubscription = Observable.interval(75, TimeUnit.MILLISECONDS, Schedulers.newThread())
+        progressSubscription = Observable.interval(100, TimeUnit.MILLISECONDS, Schedulers.newThread())
-                .onBackpressureDrop()
+                .onBackpressureLatest()
                 .observeOn(AndroidSchedulers.mainThread())
                 .subscribe(tick -> {
                     // Refresh UI only if progress change
@@ -212,6 +258,14 @@ public class PagerReaderFragment extends BaseFragment {
         }
     }
 
+    public Page getPage() {
+        return page;
+    }
+
+    public int getPosition() {
+        return position;
+    }
+
     private ReaderActivity getReaderActivity() {
         return (ReaderActivity) getActivity();
     }

app/src/main/java/eu/kanade/tachiyomi/ui/reader/viewer/pager/horizontal/HorizontalPager.java

@@ -2,38 +2,21 @@ package eu.kanade.tachiyomi.ui.reader.viewer.pager.horizontal;
 
 import android.content.Context;
 import android.support.v4.view.ViewPager;
-import android.util.AttributeSet;
-import android.view.GestureDetector;
 import android.view.MotionEvent;
 
-import eu.kanade.tachiyomi.ui.reader.viewer.base.OnChapterBoundariesOutListener;
+import eu.kanade.tachiyomi.ui.reader.viewer.pager.OnChapterBoundariesOutListener;
-import eu.kanade.tachiyomi.ui.reader.viewer.base.OnChapterSingleTapListener;
 import eu.kanade.tachiyomi.ui.reader.viewer.pager.Pager;
-import eu.kanade.tachiyomi.ui.reader.viewer.pager.PagerGestureListener;
 import rx.functions.Action1;
 
 public class HorizontalPager extends ViewPager implements Pager {
 
-    private GestureDetector gestureDetector;
-
     private OnChapterBoundariesOutListener onChapterBoundariesOutListener;
-    private OnChapterSingleTapListener onChapterSingleTapListener;
 
     private static final float SWIPE_TOLERANCE = 0.25f;
     private float startDragX;
 
     public HorizontalPager(Context context) {
         super(context);
-        init(context);
-    }
-
-    public HorizontalPager(Context context, AttributeSet attrs) {
-        super(context, attrs);
-        init(context);
-    }
-
-    private void init(Context context) {
-        gestureDetector = new GestureDetector(context, new PagerGestureListener(this));
     }
 
     @Override
@@ -47,7 +30,7 @@ public class HorizontalPager extends ViewPager implements Pager {
 
             return super.onInterceptTouchEvent(ev);
         } catch (IllegalArgumentException e) {
-            return true;
+            return false;
         }
     }
 
@@ -82,35 +65,15 @@ public class HorizontalPager extends ViewPager implements Pager {
 
             return super.onTouchEvent(ev);
         } catch (IllegalArgumentException e) {
-            return true;
+            return false;
         }
     }
 
-    @Override
-    public boolean onImageTouch(MotionEvent event) {
-        return gestureDetector.onTouchEvent(event);
-    }
-
     @Override
     public void setOnChapterBoundariesOutListener(OnChapterBoundariesOutListener listener) {
         onChapterBoundariesOutListener = listener;
     }
 
-    @Override
-    public void setOnChapterSingleTapListener(OnChapterSingleTapListener listener) {
-        onChapterSingleTapListener = listener;
-    }
-
-    @Override
-    public OnChapterBoundariesOutListener getChapterBoundariesListener() {
-        return onChapterBoundariesOutListener;
-    }
-
-    @Override
-    public OnChapterSingleTapListener getChapterSingleTapListener() {
-        return onChapterSingleTapListener;
-    }
-
     @Override
     public void setOnPageChangeListener(Action1<Integer> function) {
         addOnPageChangeListener(new SimpleOnPageChangeListener() {

app/src/main/java/eu/kanade/tachiyomi/ui/reader/viewer/pager/horizontal/HorizontalReader.java

@@ -1,19 +0,0 @@
-package eu.kanade.tachiyomi.ui.reader.viewer.pager.horizontal;
-
-import android.os.Bundle;
-import android.view.LayoutInflater;
-import android.view.View;
-import android.view.ViewGroup;
-
-import eu.kanade.tachiyomi.ui.reader.viewer.pager.PagerReader;
-
-public abstract class HorizontalReader extends PagerReader {
-
-    @Override
-    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedState) {
-        HorizontalPager pager = new HorizontalPager(getActivity());
-        initializePager(pager);
-        return pager;
-    }
-
-}

app/src/main/java/eu/kanade/tachiyomi/ui/reader/viewer/pager/horizontal/LeftToRightReader.java

@@ -1,15 +1,19 @@
 package eu.kanade.tachiyomi.ui.reader.viewer.pager.horizontal;
 
-public class LeftToRightReader extends HorizontalReader {
+import android.os.Bundle;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+
+import eu.kanade.tachiyomi.ui.reader.viewer.pager.PagerReader;
+
+public class LeftToRightReader extends PagerReader {
 
     @Override
-    public void onFirstPageOut() {
+    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedState) {
-        getReaderActivity().requestPreviousChapter();
+        HorizontalPager pager = new HorizontalPager(getActivity());
-    }
+        initializePager(pager);
-
+        return pager;
-    @Override
-    public void onLastPageOut() {
-        getReaderActivity().requestNextChapter();
     }
 
 }

app/src/main/java/eu/kanade/tachiyomi/ui/reader/viewer/pager/horizontal/RightToLeftReader.java

@@ -1,38 +1,30 @@
 package eu.kanade.tachiyomi.ui.reader.viewer.pager.horizontal;
 
-import java.util.ArrayList;
+import android.os.Bundle;
-import java.util.Collections;
+import android.view.LayoutInflater;
-import java.util.List;
+import android.view.View;
+import android.view.ViewGroup;
 
-import eu.kanade.tachiyomi.data.source.model.Page;
+import eu.kanade.tachiyomi.ui.reader.viewer.pager.PagerReader;
 
-public class RightToLeftReader extends HorizontalReader {
+public class RightToLeftReader extends PagerReader {
 
     @Override
-    public void onPageListReady(List<Page> pages, int currentPage) {
+    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedState) {
-        ArrayList<Page> inversedPages = new ArrayList<>(pages);
+        HorizontalPager pager = new HorizontalPager(getActivity());
-        Collections.reverse(inversedPages);
+        pager.setRotation(180);
-        super.onPageListReady(inversedPages, currentPage);
+        initializePager(pager);
+        return pager;
     }
 
     @Override
-    public int getPageForPosition(int position) {
+    protected void onLeftSideTap() {
-        return (getTotalPages() - 1) - position;
+        moveToNext();
     }
 
     @Override
-    public int getPositionForPage(int page) {
+    protected void onRightSideTap() {
-        return (getTotalPages() - 1) - page;
+        moveToPrevious();
-    }
-
-    @Override
-    public void onFirstPageOut() {
-        getReaderActivity().requestNextChapter();
-    }
-
-    @Override
-    public void onLastPageOut() {
-        getReaderActivity().requestPreviousChapter();
     }
 
 }

app/src/main/java/eu/kanade/tachiyomi/ui/reader/viewer/pager/vertical/VerticalPager.java

@@ -1,38 +1,21 @@
 package eu.kanade.tachiyomi.ui.reader.viewer.pager.vertical;
 
 import android.content.Context;
-import android.util.AttributeSet;
-import android.view.GestureDetector;
 import android.view.MotionEvent;
 
-import eu.kanade.tachiyomi.ui.reader.viewer.base.OnChapterBoundariesOutListener;
+import eu.kanade.tachiyomi.ui.reader.viewer.pager.OnChapterBoundariesOutListener;
-import eu.kanade.tachiyomi.ui.reader.viewer.base.OnChapterSingleTapListener;
 import eu.kanade.tachiyomi.ui.reader.viewer.pager.Pager;
-import eu.kanade.tachiyomi.ui.reader.viewer.pager.PagerGestureListener;
 import rx.functions.Action1;
 
 public class VerticalPager extends VerticalViewPagerImpl implements Pager {
 
-    private GestureDetector gestureDetector;
-
     private OnChapterBoundariesOutListener onChapterBoundariesOutListener;
-    private OnChapterSingleTapListener onChapterSingleTapListener;
 
     private static final float SWIPE_TOLERANCE = 0.25f;
     private float startDragY;
 
     public VerticalPager(Context context) {
         super(context);
-        init(context);
-    }
-
-    public VerticalPager(Context context, AttributeSet attrs) {
-        super(context, attrs);
-        init(context);
-    }
-
-    private void init(Context context) {
-        gestureDetector = new GestureDetector(context, new VerticalPagerGestureListener(this));
     }
 
     @Override
@@ -46,7 +29,7 @@ public class VerticalPager extends VerticalViewPagerImpl implements Pager {
 
             return super.onInterceptTouchEvent(ev);
         } catch (IllegalArgumentException e) {
-            return true;
+            return false;
         }
     }
 
@@ -81,35 +64,15 @@ public class VerticalPager extends VerticalViewPagerImpl implements Pager {
 
             return super.onTouchEvent(ev);
         } catch (IllegalArgumentException e) {
-            return true;
+            return false;
         }
     }
 
-    @Override
-    public boolean onImageTouch(MotionEvent event) {
-        return gestureDetector.onTouchEvent(event);
-    }
-
     @Override
     public void setOnChapterBoundariesOutListener(OnChapterBoundariesOutListener listener) {
         onChapterBoundariesOutListener = listener;
     }
 
-    @Override
-    public void setOnChapterSingleTapListener(OnChapterSingleTapListener listener) {
-        onChapterSingleTapListener = listener;
-    }
-
-    @Override
-    public OnChapterBoundariesOutListener getChapterBoundariesListener() {
-        return onChapterBoundariesOutListener;
-    }
-
-    @Override
-    public OnChapterSingleTapListener getChapterSingleTapListener() {
-        return onChapterSingleTapListener;
-    }
-
     @Override
     public void setOnPageChangeListener(Action1<Integer> function) {
         addOnPageChangeListener(new SimpleOnPageChangeListener() {
@@ -119,20 +82,5 @@ public class VerticalPager extends VerticalViewPagerImpl implements Pager {
             }
         });
     }
-
-    private static class VerticalPagerGestureListener extends PagerGestureListener {
-
-        public VerticalPagerGestureListener(Pager pager) {
-            super(pager);
-        }
-
-        @Override
-        public boolean onDown(MotionEvent e) {
-            // Vertical view pager ignores scrolling events sometimes.
-            // Returning true here fixes it, but we lose touch events on the image like
-            // double tap to zoom
-            return true;
-        }
-    }
     
 }

app/src/main/java/eu/kanade/tachiyomi/ui/reader/viewer/pager/vertical/VerticalReader.java

@@ -16,14 +16,4 @@ public class VerticalReader extends PagerReader {
         return pager;
     }
 
-    @Override
-    public void onFirstPageOut() {
-        getReaderActivity().requestPreviousChapter();
-    }
-
-    @Override
-    public void onLastPageOut() {
-        getReaderActivity().requestNextChapter();
-    }
-
 }

app/src/main/java/eu/kanade/tachiyomi/ui/reader/viewer/webtoon/WebtoonAdapter.java

@@ -10,6 +10,7 @@ import java.util.List;
 
 import eu.kanade.tachiyomi.R;
 import eu.kanade.tachiyomi.data.source.model.Page;
+import eu.kanade.tachiyomi.ui.reader.ReaderActivity;
 
 public class WebtoonAdapter extends RecyclerView.Adapter<WebtoonHolder> {
 
@@ -20,7 +21,7 @@ public class WebtoonAdapter extends RecyclerView.Adapter<WebtoonHolder> {
     public WebtoonAdapter(WebtoonReader fragment) {
         this.fragment = fragment;
         pages = new ArrayList<>();
-        touchListener = (v, event) -> fragment.onImageTouch(event);
+        touchListener = (v, event) -> fragment.gestureDetector.onTouchEvent(event);
     }
 
     public Page getItem(int position) {
@@ -64,4 +65,8 @@ public class WebtoonAdapter extends RecyclerView.Adapter<WebtoonHolder> {
         return fragment;
     }
 
+    public ReaderActivity getReaderActivity() {
+        return (ReaderActivity) fragment.getActivity();
+    }
+
 }

app/src/main/java/eu/kanade/tachiyomi/ui/reader/viewer/webtoon/WebtoonHolder.java

@@ -4,14 +4,14 @@ import android.support.v7.widget.RecyclerView;
 import android.view.MotionEvent;
 import android.view.View;
 import android.view.ViewGroup;
-import android.view.animation.Animation;
-import android.view.animation.AnimationUtils;
 import android.widget.Button;
 import android.widget.ProgressBar;
 
 import com.davemorrissey.labs.subscaleview.ImageSource;
 import com.davemorrissey.labs.subscaleview.SubsamplingScaleImageView;
 
+import java.io.File;
+
 import butterknife.Bind;
 import butterknife.ButterKnife;
 import eu.kanade.tachiyomi.R;
@@ -24,7 +24,6 @@ public class WebtoonHolder extends RecyclerView.ViewHolder {
     @Bind(R.id.progress) ProgressBar progressBar;
     @Bind(R.id.retry_button) Button retryButton;
 
-    private Animation fadeInAnimation;
     private Page page;
     private WebtoonAdapter adapter;
 
@@ -33,27 +32,38 @@ public class WebtoonHolder extends RecyclerView.ViewHolder {
         this.adapter = adapter;
         ButterKnife.bind(this, view);
 
-        fadeInAnimation = AnimationUtils.loadAnimation(view.getContext(), R.anim.fade_in);
-
         imageView.setParallelLoadingEnabled(true);
+        imageView.setMaxBitmapDimensions(adapter.getReaderActivity().getMaxBitmapSize());
         imageView.setDoubleTapZoomStyle(SubsamplingScaleImageView.ZOOM_FOCUS_FIXED);
         imageView.setPanLimit(SubsamplingScaleImageView.PAN_LIMIT_INSIDE);
-        imageView.setMinimumScaleType(SubsamplingScaleImageView.SCALE_TYPE_CENTER_INSIDE);
+        imageView.setMinimumScaleType(SubsamplingScaleImageView.SCALE_TYPE_FIT_WIDTH);
+        imageView.setMaxScale(10);
+        imageView.setRegionDecoderClass(adapter.getReader().getRegionDecoderClass());
+        imageView.setBitmapDecoderClass(adapter.getReader().getBitmapDecoderClass());
+        imageView.setVerticalScrollingParent(true);
         imageView.setOnTouchListener(touchListener);
         imageView.setOnImageEventListener(new SubsamplingScaleImageView.DefaultOnImageEventListener() {
             @Override
             public void onImageLoaded() {
-                imageView.startAnimation(fadeInAnimation);
+                // When the image is loaded, reset the minimum height to avoid gaps
+                container.setMinimumHeight(0);
             }
         });
-        progressBar.setMinimumHeight(view.getResources().getDisplayMetrics().heightPixels);
+
+        // Avoid to create a lot of view holders taking twice the screen height,
+        // saving memory and a possible OOM. When the first image is loaded in this holder,
+        // the minimum size will be removed.
+        // Doing this we get sequential holder instantiation.
+        container.setMinimumHeight(view.getResources().getDisplayMetrics().heightPixels * 2);
+
+        // Leave some space between progress bars
+        progressBar.setMinimumHeight(300);
 
         container.setOnTouchListener(touchListener);
         retryButton.setOnTouchListener((v, event) -> {
             if (event.getAction() == MotionEvent.ACTION_UP) {
                 if (page != null)
                     adapter.retryPage(page);
-                return true;
             }
             return true;
         });
@@ -90,8 +100,14 @@ public class WebtoonHolder extends RecyclerView.ViewHolder {
         setErrorButtonVisible(false);
         setProgressVisible(false);
         setImageVisible(true);
-        imageView.setRegionDecoderClass(adapter.getReader().getRegionDecoderClass());
+
-        imageView.setImage(ImageSource.uri(page.getImagePath()));
+        File imagePath = new File(page.getImagePath());
+        if (imagePath.exists()) {
+            imageView.setImage(ImageSource.uri(page.getImagePath()));
+        } else {
+            page.setStatus(Page.ERROR);
+            onError();
+        }
     }
 
     private void onError() {

app/src/main/java/eu/kanade/tachiyomi/ui/reader/viewer/webtoon/WebtoonReader.java

@@ -1,7 +1,6 @@
 package eu.kanade.tachiyomi.ui.reader.viewer.webtoon;
 
 import android.os.Bundle;
-import android.support.annotation.Nullable;
 import android.support.v7.widget.RecyclerView;
 import android.view.GestureDetector;
 import android.view.LayoutInflater;
@@ -9,8 +8,9 @@ import android.view.MotionEvent;
 import android.view.View;
 import android.view.ViewGroup;
 
-import java.util.List;
+import java.util.ArrayList;
 
+import eu.kanade.tachiyomi.data.database.models.Chapter;
 import eu.kanade.tachiyomi.data.source.model.Page;
 import eu.kanade.tachiyomi.ui.reader.viewer.base.BaseReader;
 import eu.kanade.tachiyomi.widget.PreCachingLayoutManager;
@@ -28,14 +28,27 @@ public class WebtoonReader extends BaseReader {
     private PreCachingLayoutManager layoutManager;
     private Subscription subscription;
     private Subscription decoderSubscription;
-    private GestureDetector gestureDetector;
+    protected GestureDetector gestureDetector;
+
+    private int scrollDistance;
+
+    private static final String SAVED_POSITION = "saved_position";
+
+    private static final float LEFT_REGION = 0.33f;
+    private static final float RIGHT_REGION = 0.66f;
 
-    @Nullable
     @Override
     public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedState) {
         adapter = new WebtoonAdapter(this);
+
+        int screenHeight = getResources().getDisplayMetrics().heightPixels;
+        scrollDistance = screenHeight * 3 / 4;
+
         layoutManager = new PreCachingLayoutManager(getActivity());
-        layoutManager.setExtraLayoutSpace(getResources().getDisplayMetrics().heightPixels);
+        layoutManager.setExtraLayoutSpace(screenHeight / 2);
+        if (savedState != null) {
+            layoutManager.scrollToPositionWithOffset(savedState.getInt(SAVED_POSITION), 0);
+        }
 
         recycler = new RecyclerView(getActivity());
         recycler.setLayoutParams(new ViewGroup.LayoutParams(MATCH_PARENT, MATCH_PARENT));
@@ -45,29 +58,28 @@ public class WebtoonReader extends BaseReader {
 
         decoderSubscription = getReaderActivity().getPreferences().imageDecoder()
                 .asObservable()
-                .doOnNext(this::setRegionDecoderClass)
+                .doOnNext(this::setDecoderClass)
                 .skip(1)
                 .distinctUntilChanged()
-                .subscribe(v -> adapter.notifyDataSetChanged());
+                .subscribe(v -> recycler.setAdapter(adapter));
 
-        gestureDetector = new GestureDetector(getActivity(), new SimpleOnGestureListener() {
+        gestureDetector = new GestureDetector(recycler.getContext(), new SimpleOnGestureListener() {
             @Override
             public boolean onSingleTapConfirmed(MotionEvent e) {
-                getReaderActivity().onCenterSingleTap();
+                final float positionX = e.getX();
+
+                if (positionX < recycler.getWidth() * LEFT_REGION) {
+                    moveToPrevious();
+                } else if (positionX > recycler.getWidth() * RIGHT_REGION) {
+                    moveToNext();
+                } else {
+                    getReaderActivity().onCenterSingleTap();
+                }
                 return true;
             }
-
-            @Override
-            public boolean onDown(MotionEvent e) {
-                // The only way I've found to allow panning. Double tap event (zoom) is lost
-                // but panning should be the most used one
-                return true;
-            }
-
         });
 
         setPages();
-
         return recycler;
     }
 
@@ -83,6 +95,14 @@ public class WebtoonReader extends BaseReader {
         super.onPause();
     }
 
+    @Override
+    public void onSaveInstanceState(Bundle outState) {
+        super.onSaveInstanceState(outState);
+        int savedPosition = pages != null ?
+                pages.get(layoutManager.findFirstVisibleItemPosition()).getPageNumber() : 0;
+        outState.putInt(SAVED_POSITION, savedPosition);
+    }
+
     private void unsubscribeStatus() {
         if (subscription != null && !subscription.isUnsubscribed())
             subscription.unsubscribe();
@@ -90,15 +110,42 @@ public class WebtoonReader extends BaseReader {
 
     @Override
     public void setSelectedPage(int pageNumber) {
-        recycler.scrollToPosition(getPositionForPage(pageNumber));
+        recycler.scrollToPosition(pageNumber);
     }
 
     @Override
-    public void onPageListReady(List<Page> pages, int currentPage) {
+    public void moveToNext() {
-        if (this.pages != pages) {
+        recycler.smoothScrollBy(0, scrollDistance);
-            this.pages = pages;
+    }
-            if (isResumed()) {
+
-                setPages();
+    @Override
+    public void moveToPrevious() {
+        recycler.smoothScrollBy(0, -scrollDistance);
+    }
+
+    @Override
+    public void onSetChapter(Chapter chapter, Page currentPage) {
+        pages = new ArrayList<>(chapter.getPages());
+        // Restoring current page is not supported. It's getting weird scrolling jumps
+        // this.currentPage = currentPage;
+
+        // This method can be called before the view is created
+        if (recycler != null) {
+            setPages();
+        }
+    }
+
+    @Override
+    public void onAppendChapter(Chapter chapter) {
+        int insertStart = pages.size();
+        pages.addAll(chapter.getPages());
+
+        // This method can be called before the view is created
+        if (recycler != null) {
+            adapter.setPages(pages);
+            adapter.notifyItemRangeInserted(insertStart, chapter.getPages().size());
+            if (subscription != null && subscription.isUnsubscribed()) {
+                observeStatus(insertStart);
             }
         }
     }
@@ -109,6 +156,7 @@ public class WebtoonReader extends BaseReader {
             recycler.clearOnScrollListeners();
             adapter.setPages(pages);
             recycler.setAdapter(adapter);
+            updatePageNumber();
             setScrollListener();
             observeStatus(0);
         }
@@ -118,22 +166,19 @@ public class WebtoonReader extends BaseReader {
         recycler.addOnScrollListener(new RecyclerView.OnScrollListener() {
             @Override
             public void onScrolled(RecyclerView recyclerView, int dx, int dy) {
-                super.onScrolled(recyclerView, dx, dy);
+                int page = layoutManager.findLastVisibleItemPosition();
-
+                if (page != currentPage) {
-                currentPage = layoutManager.findLastVisibleItemPosition();
+                    onPageChanged(page);
-                updatePageNumber();
+                }
             }
         });
     }
 
-    @Override
-    public boolean onImageTouch(MotionEvent motionEvent) {
-        return gestureDetector.onTouchEvent(motionEvent);
-    }
-
     private void observeStatus(int position) {
-        if (position == pages.size())
+        if (position == pages.size()) {
+            unsubscribeStatus();
             return;
+        }
 
         final Page page = pages.get(position);
 

app/src/main/java/eu/kanade/tachiyomi/ui/recent/RecentChaptersAdapter.java

@@ -1,7 +1,7 @@
 package eu.kanade.tachiyomi.ui.recent;
 
 import android.support.v7.widget.RecyclerView;
-import android.text.format.DateFormat;
+import android.text.format.DateUtils;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;
@@ -10,17 +10,39 @@ import android.widget.TextView;
 import java.util.Date;
 import java.util.List;
 
+import butterknife.Bind;
+import butterknife.ButterKnife;
 import eu.davidea.flexibleadapter.FlexibleAdapter;
 import eu.kanade.tachiyomi.R;
 import eu.kanade.tachiyomi.data.database.models.MangaChapter;
 
+/**
+ * Adapter of RecentChaptersHolder.
+ * Connection between Fragment and Holder
+ * Holder updates should be called from here.
+ */
 public class RecentChaptersAdapter extends FlexibleAdapter<RecyclerView.ViewHolder, Object> {
 
-    private RecentChaptersFragment fragment;
+    /**
+     * Fragment of RecentChaptersFragment
+     */
+    private final RecentChaptersFragment fragment;
 
-    private static final int CHAPTER = 0;
+    /**
-    private static final int SECTION = 1;
+     * The id of the view type
+     */
+    private static final int VIEW_TYPE_CHAPTER = 0;
 
+    /**
+     * The id of the view type
+     */
+    private static final int VIEW_TYPE_SECTION = 1;
+
+    /**
+     * Constructor
+     *
+     * @param fragment fragment
+     */
     public RecentChaptersAdapter(RecentChaptersFragment fragment) {
         this.fragment = fragment;
         setHasStableIds(true);
@@ -35,6 +57,11 @@ public class RecentChaptersAdapter extends FlexibleAdapter<RecyclerView.ViewHold
             return item.hashCode();
     }
 
+    /**
+     * Update items
+     *
+     * @param items items
+     */
     public void setItems(List<Object> items) {
         mItems = items;
         notifyDataSetChanged();
@@ -47,18 +74,20 @@ public class RecentChaptersAdapter extends FlexibleAdapter<RecyclerView.ViewHold
 
     @Override
     public int getItemViewType(int position) {
-        return getItem(position) instanceof MangaChapter ? CHAPTER : SECTION;
+        return getItem(position) instanceof MangaChapter ? VIEW_TYPE_CHAPTER : VIEW_TYPE_SECTION;
     }
 
     @Override
     public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
         LayoutInflater inflater = LayoutInflater.from(parent.getContext());
         View v;
+
+        // Check which view type and set correct values.
         switch (viewType) {
-            case CHAPTER:
+            case VIEW_TYPE_CHAPTER:
                 v = inflater.inflate(R.layout.item_recent_chapter, parent, false);
                 return new RecentChaptersHolder(v, this, fragment);
-            case SECTION:
+            case VIEW_TYPE_SECTION:
                 v = inflater.inflate(R.layout.item_recent_chapter_section, parent, false);
                 return new SectionViewHolder(v);
         }
@@ -67,12 +96,13 @@ public class RecentChaptersAdapter extends FlexibleAdapter<RecyclerView.ViewHold
 
     @Override
     public void onBindViewHolder(RecyclerView.ViewHolder holder, int position) {
+        // Check which view type and set correct values.
         switch (holder.getItemViewType()) {
-            case CHAPTER:
+            case VIEW_TYPE_CHAPTER:
                 final MangaChapter chapter = (MangaChapter) getItem(position);
                 ((RecentChaptersHolder) holder).onSetValues(chapter);
                 break;
-            case SECTION:
+            case VIEW_TYPE_SECTION:
                 final Date date = (Date) getItem(position);
                 ((SectionViewHolder) holder).onSetValues(date);
                 break;
@@ -82,22 +112,29 @@ public class RecentChaptersAdapter extends FlexibleAdapter<RecyclerView.ViewHold
         holder.itemView.setActivated(isSelected(position));
     }
 
+    /**
+     * Returns fragment
+     * @return RecentChaptersFragment
+     */
     public RecentChaptersFragment getFragment() {
         return fragment;
     }
 
-    private static class SectionViewHolder extends RecyclerView.ViewHolder {
+    public static class SectionViewHolder extends RecyclerView.ViewHolder {
 
-        private TextView view;
+        @Bind(R.id.section_text) TextView section;
+
+        private final long now = new Date().getTime();
 
         public SectionViewHolder(View view) {
             super(view);
-            this.view = (TextView) view;
+            ButterKnife.bind(this, view);
         }
 
         public void onSetValues(Date date) {
-            String s = DateFormat.getDateFormat(view.getContext()).format(date);
+            CharSequence s = DateUtils.getRelativeTimeSpanString(
-            view.setText(s);
+                    date.getTime(), now, DateUtils.DAY_IN_MILLIS);
+            section.setText(s);
         }
     }
 }

app/src/main/java/eu/kanade/tachiyomi/ui/recent/RecentChaptersFragment.java

@@ -2,6 +2,7 @@ package eu.kanade.tachiyomi.ui.recent;
 
 import android.content.Intent;
 import android.os.Bundle;
+import android.support.annotation.Nullable;
 import android.support.v4.content.ContextCompat;
 import android.support.v7.widget.LinearLayoutManager;
 import android.support.v7.widget.RecyclerView;
@@ -9,18 +10,32 @@ import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;
 
+import com.afollestad.materialdialogs.MaterialDialog;
+
 import java.util.List;
 
 import butterknife.Bind;
 import butterknife.ButterKnife;
 import eu.kanade.tachiyomi.R;
+import eu.kanade.tachiyomi.data.database.models.Chapter;
+import eu.kanade.tachiyomi.data.database.models.Manga;
 import eu.kanade.tachiyomi.data.database.models.MangaChapter;
+import eu.kanade.tachiyomi.data.download.DownloadService;
+import eu.kanade.tachiyomi.data.download.model.Download;
 import eu.kanade.tachiyomi.ui.base.adapter.FlexibleViewHolder;
 import eu.kanade.tachiyomi.ui.base.fragment.BaseRxFragment;
 import eu.kanade.tachiyomi.ui.decoration.DividerItemDecoration;
 import eu.kanade.tachiyomi.ui.reader.ReaderActivity;
 import nucleus.factory.RequiresPresenter;
+import rx.Observable;
+import rx.android.schedulers.AndroidSchedulers;
+import rx.schedulers.Schedulers;
 
+/**
+ * Fragment that shows recent chapters.
+ * Uses R.layout.fragment_recent_chapters.
+ * UI related actions should be called from here.
+ */
 @RequiresPresenter(RecentChaptersPresenter.class)
 public class RecentChaptersFragment extends BaseRxFragment<RecentChaptersPresenter> implements FlexibleViewHolder.OnListItemClickListener {
 
@@ -50,14 +65,21 @@ public class RecentChaptersFragment extends BaseRxFragment<RecentChaptersPresent
         return view;
     }
 
+    /**
+     * Populate adapter with chapters
+     *
+     * @param chapters list of chapters
+     */
     public void onNextMangaChapters(List<Object> chapters) {
         adapter.setItems(chapters);
     }
 
     @Override
     public boolean onListItemClick(int position) {
+        // Get item from position
         Object item = adapter.getItem(position);
         if (item instanceof MangaChapter) {
+            // Open chapter in reader
             openChapter((MangaChapter) item);
         }
         return false;
@@ -65,12 +87,114 @@ public class RecentChaptersFragment extends BaseRxFragment<RecentChaptersPresent
 
     @Override
     public void onListItemLongClick(int position) {
-
+        // Empty function
     }
 
-    protected void openChapter(MangaChapter chapter) {
+    /**
+     * Open chapter in reader
+     *
+     * @param chapter selected chapter
+     */
+    private void openChapter(MangaChapter chapter) {
         getPresenter().onOpenChapter(chapter);
         Intent intent = ReaderActivity.newIntent(getActivity());
         startActivity(intent);
     }
+
+    /**
+     * Update download status of chapter
+     *
+     * @param download download object containing download progress.
+     */
+    public void onChapterStatusChange(Download download) {
+        RecentChaptersHolder holder = getHolder(download.chapter);
+        if (holder != null)
+            holder.onStatusChange(download.getStatus());
+    }
+
+    @Nullable
+    private RecentChaptersHolder getHolder(Chapter chapter) {
+        return (RecentChaptersHolder) recyclerView.findViewHolderForItemId(chapter.id);
+    }
+
+    /**
+     * Start downloading chapter
+     *
+     * @param chapters selected chapters
+     * @param manga    manga that belongs to chapter
+     * @return true
+     */
+    @SuppressWarnings("SameReturnValue")
+    protected boolean onDownload(Observable<Chapter> chapters, Manga manga) {
+        // Start the download service.
+        DownloadService.start(getActivity());
+
+        // Refresh data on download competition.
+        Observable<Chapter> observable = chapters
+                .doOnCompleted(adapter::notifyDataSetChanged);
+
+        // Download chapter.
+        getPresenter().downloadChapter(observable, manga);
+        return true;
+    }
+
+    /**
+     * Start deleting chapter
+     * @param chapters selected chapters
+     * @param manga manga that belongs to chapter
+     * @return success of deletion.
+     */
+    protected boolean onDelete(Observable<Chapter> chapters, Manga manga) {
+        int size = adapter.getSelectedItemCount();
+
+        MaterialDialog dialog = new MaterialDialog.Builder(getActivity())
+                .title(R.string.deleting)
+                .progress(false, size, true)
+                .cancelable(false)
+                .show();
+
+        Observable<Chapter> observable = chapters
+                .concatMap(chapter -> {
+                    getPresenter().deleteChapter(chapter, manga);
+                    return Observable.just(chapter);
+                })
+                .subscribeOn(Schedulers.io())
+                .observeOn(AndroidSchedulers.mainThread())
+                .doOnNext(chapter -> {
+                    dialog.incrementProgress(1);
+                    chapter.status = Download.NOT_DOWNLOADED;
+                })
+                .doOnCompleted(adapter::notifyDataSetChanged)
+                .finallyDo(dialog::dismiss);
+
+        getPresenter().deleteChapters(observable);
+
+        return true;
+    }
+
+    /**
+     * Mark chapter as read
+     *
+     * @param chapters selected chapter
+     * @return true
+     */
+    @SuppressWarnings("SameReturnValue")
+    protected boolean onMarkAsRead(Observable<Chapter> chapters) {
+        getPresenter().markChaptersRead(chapters, true);
+        return true;
+    }
+
+    /**
+     * Mark chapter as unread
+     *
+     * @param chapters selected chapter
+     * @return true
+     */
+    @SuppressWarnings("SameReturnValue")
+    protected boolean onMarkAsUnread(Observable<Chapter> chapters) {
+        getPresenter().markChaptersRead(chapters, false);
+        return true;
+    }
+
+
 }

app/src/main/java/eu/kanade/tachiyomi/ui/recent/RecentChaptersHolder.java

@@ -1,35 +1,102 @@
 package eu.kanade.tachiyomi.ui.recent;
 
 import android.support.v4.content.ContextCompat;
+import android.view.Menu;
 import android.view.View;
+import android.widget.PopupMenu;
+import android.widget.RelativeLayout;
 import android.widget.TextView;
 
 import butterknife.Bind;
 import butterknife.ButterKnife;
 import eu.kanade.tachiyomi.R;
+import eu.kanade.tachiyomi.data.database.models.Chapter;
 import eu.kanade.tachiyomi.data.database.models.MangaChapter;
+import eu.kanade.tachiyomi.data.download.model.Download;
 import eu.kanade.tachiyomi.ui.base.adapter.FlexibleViewHolder;
+import rx.Observable;
 
+/**
+ * Holder that contains chapter item
+ * Uses R.layout.item_recent_chapter.
+ * UI related actions should be called from here.
+ */
 public class RecentChaptersHolder extends FlexibleViewHolder {
 
+    /**
+     * Adapter for recent chapters
+     */
+    private final RecentChaptersAdapter adapter;
+
+    /**
+     * TextView containing chapter title
+     */
     @Bind(R.id.chapter_title) TextView chapterTitle;
+
+    /**
+     * TextView containing manga name
+     */
     @Bind(R.id.manga_title) TextView mangaTitle;
 
+    /**
+     * TextView containing download status
+     */
+    @Bind(R.id.download_text) TextView downloadText;
+
+    /**
+     * RelativeLayout containing popup menu with download options
+     */
+    @Bind(R.id.chapter_menu) RelativeLayout chapterMenu;
+
+    /**
+     * Color of read chapter
+     */
     private final int readColor;
+
+    /**
+     * Color of unread chapter
+     */
     private final int unreadColor;
 
+    /**
+     * Object containing chapter information
+     */
+    private MangaChapter mangaChapter;
+
+    /**
+     * Constructor of RecentChaptersHolder
+     * @param view view of ChapterHolder
+     * @param adapter adapter of ChapterHolder
+     * @param onListItemClickListener ClickListener
+     */
     public RecentChaptersHolder(View view, RecentChaptersAdapter adapter, OnListItemClickListener onListItemClickListener) {
         super(view, adapter, onListItemClickListener);
+        this.adapter = adapter;
         ButterKnife.bind(this, view);
 
+        // Set colors.
         readColor = ContextCompat.getColor(view.getContext(), R.color.hint_text);
         unreadColor = ContextCompat.getColor(view.getContext(), R.color.primary_text);
+
+        //Set OnClickListener for download menu
+        chapterMenu.setOnClickListener(v -> v.post(() -> showPopupMenu(v)));
     }
 
+    /**
+     * Set values of view
+     *
+     * @param item item containing chapter information
+     */
     public void onSetValues(MangaChapter item) {
+        this.mangaChapter = item;
+
+        // Set chapter title
         chapterTitle.setText(item.chapter.name);
+
+        // Set manga title
         mangaTitle.setText(item.manga.title);
 
+        // Check if chapter is read and set correct color
         if (item.chapter.read) {
             chapterTitle.setTextColor(readColor);
             mangaTitle.setTextColor(readColor);
@@ -37,6 +104,84 @@ public class RecentChaptersHolder extends FlexibleViewHolder {
             chapterTitle.setTextColor(unreadColor);
             mangaTitle.setTextColor(unreadColor);
         }
+
+        // Set chapter status
+        onStatusChange(item.chapter.status);
     }
 
+    /**
+     * Updates chapter status in view.
+     *
+     * @param status download status
+     */
+    public void onStatusChange(int status) {
+        switch (status) {
+            case Download.QUEUE:
+                downloadText.setText(R.string.chapter_queued);
+                break;
+            case Download.DOWNLOADING:
+                downloadText.setText(R.string.chapter_downloading);
+                break;
+            case Download.DOWNLOADED:
+                downloadText.setText(R.string.chapter_downloaded);
+                break;
+            case Download.ERROR:
+                downloadText.setText(R.string.chapter_error);
+                break;
+            default:
+                downloadText.setText("");
+                break;
+        }
+    }
+
+    /**
+     * Show pop up menu
+     * @param view view containing popup menu.
+     */
+    private void showPopupMenu(View view) {
+        // Create a PopupMenu, giving it the clicked view for an anchor
+        PopupMenu popup = new PopupMenu(adapter.getFragment().getActivity(), view);
+
+        // Inflate our menu resource into the PopupMenu's Menu
+        popup.getMenuInflater().inflate(R.menu.chapter_recent, popup.getMenu());
+
+        // Hide download and show delete if the chapter is downloaded and
+        if (mangaChapter.chapter.isDownloaded()) {
+            Menu menu = popup.getMenu();
+            menu.findItem(R.id.action_download).setVisible(false);
+            menu.findItem(R.id.action_delete).setVisible(true);
+        }
+
+        // Hide mark as unread when the chapter is unread
+        if (!mangaChapter.chapter.read /*&& mangaChapter.chapter.last_page_read == 0*/) {
+            popup.getMenu().findItem(R.id.action_mark_as_unread).setVisible(false);
+        }
+
+        // Hide mark as read when the chapter is read
+        if (mangaChapter.chapter.read) {
+            popup.getMenu().findItem(R.id.action_mark_as_read).setVisible(false);
+        }
+
+        // Set a listener so we are notified if a menu item is clicked
+        popup.setOnMenuItemClickListener(menuItem -> {
+            Observable<Chapter> chapterObservable = Observable.just(mangaChapter.chapter);
+
+            switch (menuItem.getItemId()) {
+                case R.id.action_download:
+                    return adapter.getFragment().onDownload(chapterObservable, mangaChapter.manga);
+                case R.id.action_delete:
+                    return adapter.getFragment().onDelete(chapterObservable, mangaChapter.manga);
+                case R.id.action_mark_as_read:
+                    return adapter.getFragment().onMarkAsRead(chapterObservable);
+                case R.id.action_mark_as_unread:
+                    return adapter.getFragment().onMarkAsUnread(chapterObservable);
+            }
+            return false;
+        });
+
+        // Finally show the PopupMenu
+        popup.show();
+    }
+
+
 }

app/src/main/java/eu/kanade/tachiyomi/ui/recent/RecentChaptersPresenter.java

@@ -2,6 +2,8 @@ package eu.kanade.tachiyomi.ui.recent;
 
 import android.os.Bundle;
 
+import org.greenrobot.eventbus.EventBus;
+
 import java.util.ArrayList;
 import java.util.Calendar;
 import java.util.Collection;
@@ -12,44 +14,185 @@ import java.util.TreeMap;
 
 import javax.inject.Inject;
 
-import de.greenrobot.event.EventBus;
 import eu.kanade.tachiyomi.data.database.DatabaseHelper;
+import eu.kanade.tachiyomi.data.database.models.Chapter;
+import eu.kanade.tachiyomi.data.database.models.Manga;
 import eu.kanade.tachiyomi.data.database.models.MangaChapter;
+import eu.kanade.tachiyomi.data.download.DownloadManager;
+import eu.kanade.tachiyomi.data.download.model.Download;
 import eu.kanade.tachiyomi.data.source.SourceManager;
 import eu.kanade.tachiyomi.data.source.base.Source;
+import eu.kanade.tachiyomi.event.DownloadChaptersEvent;
 import eu.kanade.tachiyomi.event.ReaderEvent;
 import eu.kanade.tachiyomi.ui.base.presenter.BasePresenter;
 import rx.Observable;
 import rx.android.schedulers.AndroidSchedulers;
+import rx.schedulers.Schedulers;
+import timber.log.Timber;
 
+/**
+ * Presenter of RecentChaptersFragment.
+ * Contains information and data for fragment.
+ * Observable updates should be called from here.
+ */
 public class RecentChaptersPresenter extends BasePresenter<RecentChaptersFragment> {
 
+    /**
+     * The id of the restartable.
+     */
+    private static final int GET_RECENT_CHAPTERS = 1;
+
+    /**
+     * The id of the restartable.
+     */
+    private static final int CHAPTER_STATUS_CHANGES = 2;
+
+    /**
+     * Used to connect to database
+     */
     @Inject DatabaseHelper db;
+
+    /**
+     * Used to get information from download manager
+     */
+    @Inject DownloadManager downloadManager;
+
+    /**
+     * Used to get source from source id
+     */
     @Inject SourceManager sourceManager;
 
-    private static final int GET_RECENT_CHAPTERS = 1;
+    /**
+     * List containing chapter and manga information
+     */
+    private List<MangaChapter> mangaChapters;
 
     @Override
     protected void onCreate(Bundle savedState) {
         super.onCreate(savedState);
 
+        // Used to get recent chapters
         restartableLatestCache(GET_RECENT_CHAPTERS,
                 this::getRecentChaptersObservable,
-                RecentChaptersFragment::onNextMangaChapters);
+                (recentChaptersFragment, chapters) -> {
+                    // Update adapter to show recent manga's
+                    recentChaptersFragment.onNextMangaChapters(chapters);
+                    // Update download status
+                    updateChapterStatus(convertToMangaChaptersList(chapters));
+                });
 
-        if (savedState == null)
+        // Used to update download status
+        startableLatestCache(CHAPTER_STATUS_CHANGES,
+                this::getChapterStatusObs,
+                RecentChaptersFragment::onChapterStatusChange,
+                (view, error) -> Timber.e(error.getCause(), error.getMessage()));
+
+        if (savedState == null) {
+            // Start fetching recent chapters
             start(GET_RECENT_CHAPTERS);
+        }
     }
 
+    /**
+     * Returns a list only containing MangaChapter objects.
+     *
+     * @param input the list that will be converted.
+     * @return list containing MangaChapters objects.
+     */
+    private List<MangaChapter> convertToMangaChaptersList(List<Object> input) {
+        // Create temp list
+        List<MangaChapter> tempMangaChapterList = new ArrayList<>();
+
+        // Only add MangaChapter objects
+        //noinspection Convert2streamapi
+        for (Object object : input) {
+            if (object instanceof MangaChapter) {
+                tempMangaChapterList.add((MangaChapter) object);
+            }
+        }
+
+        // Return temp list
+        return tempMangaChapterList;
+    }
+
+    /**
+     * Update status of chapters
+     *
+     * @param mangaChapters list containing recent chapters
+     */
+    private void updateChapterStatus(List<MangaChapter> mangaChapters) {
+        // Set global list of chapters.
+        this.mangaChapters = mangaChapters;
+
+        // Update status.
+        //noinspection Convert2streamapi
+        for (MangaChapter mangaChapter : mangaChapters)
+            setChapterStatus(mangaChapter);
+
+        // Start onChapterStatusChange restartable.
+        start(CHAPTER_STATUS_CHANGES);
+    }
+
+    /**
+     * Returns observable containing chapter status.
+     *
+     * @return download object containing download progress.
+     */
+    private Observable<Download> getChapterStatusObs() {
+        return downloadManager.getQueue().getStatusObservable()
+                .observeOn(AndroidSchedulers.mainThread())
+                .filter(download -> chapterIdEquals(download.chapter.id))
+                .doOnNext(this::updateChapterStatus);
+    }
+
+    /**
+     * Function to check if chapter is in recent list
+     * @param chaptersId id of chapter
+     * @return exist in recent list
+     */
+    private boolean chapterIdEquals(Long chaptersId) {
+        for (MangaChapter mangaChapter : mangaChapters) {
+            if (chaptersId.equals(mangaChapter.chapter.id)) {
+                return true;
+            }
+        }
+        return false;
+    }
+
+    /**
+     * Update status of chapters.
+     *
+     * @param download download object containing progress.
+     */
+    private void updateChapterStatus(Download download) {
+        // Loop through list
+        for (MangaChapter item : mangaChapters) {
+            if (download.chapter.id.equals(item.chapter.id)) {
+                item.chapter.status = download.getStatus();
+                    break;
+            }
+        }
+    }
+
+    /**
+     * Get observable containing recent chapters and date
+     * @return observable containing recent chapters and date
+     */
     private Observable<List<Object>> getRecentChaptersObservable() {
-        return db.getRecentChapters().asRxObservable()
+        // Set date for recent chapters
-                // group chapters by the date they were fetched on a ordered map
+        Calendar cal = Calendar.getInstance();
+        cal.setTime(new Date());
+        cal.add(Calendar.MONTH, -1);
+
+        // Get recent chapters from database.
+        return db.getRecentChapters(cal.getTime()).asRxObservable()
+                // Group chapters by the date they were fetched on a ordered map.
                 .flatMap(recents -> Observable.from(recents)
                         .toMultimap(
                                 recent -> getMapKey(recent.chapter.date_fetch),
                                 recent -> recent,
                                 () -> new TreeMap<>((d1, d2) -> d2.compareTo(d1))))
-                // add every day and all its chapters to a single list
+                // Add every day and all its chapters to a single list.
                 .map(recents -> {
                     List<Object> items = new ArrayList<>();
                     for (Map.Entry<Date, Collection<MangaChapter>> recent : recents.entrySet()) {
@@ -61,6 +204,35 @@ public class RecentChaptersPresenter extends BasePresenter<RecentChaptersFragmen
                 .observeOn(AndroidSchedulers.mainThread());
     }
 
+    /**
+     * Set the chapter status
+     * @param mangaChapter MangaChapter which status gets updated
+     */
+    private void setChapterStatus(MangaChapter mangaChapter) {
+        // Check if chapter in queue
+        for (Download download : downloadManager.getQueue()) {
+            if (mangaChapter.chapter.id.equals(download.chapter.id)) {
+                mangaChapter.chapter.status = download.getStatus();
+                return;
+            }
+        }
+
+        // Get source of chapter
+        Source source = sourceManager.get(mangaChapter.manga.source);
+
+        // Check if chapter is downloaded
+        if (downloadManager.isChapterDownloaded(source, mangaChapter.manga, mangaChapter.chapter)) {
+            mangaChapter.chapter.status = Download.DOWNLOADED;
+        } else {
+            mangaChapter.chapter.status = Download.NOT_DOWNLOADED;
+        }
+    }
+
+    /**
+     * Get date as time key
+     * @param date desired date
+     * @return date as time key
+     */
     private Date getMapKey(long date) {
         Calendar cal = Calendar.getInstance();
         cal.setTime(new Date(date));
@@ -71,8 +243,67 @@ public class RecentChaptersPresenter extends BasePresenter<RecentChaptersFragmen
         return cal.getTime();
     }
 
+    /**
+     * Open chapter in reader
+     * @param item chapter that is opened
+     */
     public void onOpenChapter(MangaChapter item) {
         Source source = sourceManager.get(item.manga.source);
         EventBus.getDefault().postSticky(new ReaderEvent(source, item.manga, item.chapter));
     }
+
+    /**
+     * Download selected chapter
+     * @param selectedChapter chapter that is selected
+     * @param manga manga that belongs to chapter
+     */
+    public void downloadChapter(Observable<Chapter> selectedChapter, Manga manga) {
+        add(selectedChapter
+                .toList()
+                .subscribe(chapters -> {
+                    EventBus.getDefault().postSticky(new DownloadChaptersEvent(manga, chapters));
+                }));
+    }
+
+    /**
+     * Delete selected chapter
+     * @param chapter chapter that is selected
+     * @param manga manga that belongs to chapter
+     */
+    public void deleteChapter(Chapter chapter, Manga manga) {
+        Source source = sourceManager.get(manga.source);
+        downloadManager.deleteChapter(source, manga, chapter);
+    }
+
+    /**
+     * Delete selected chapter observable
+     * @param selectedChapters chapter that are selected
+     */
+    public void deleteChapters(Observable<Chapter> selectedChapters) {
+        add(selectedChapters
+                .subscribe(chapter -> {
+                    downloadManager.getQueue().remove(chapter);
+                }, error -> {
+                    Timber.e(error.getMessage());
+                }));
+    }
+
+    /**
+     * Mark selected chapter as read
+     * @param selectedChapters chapter that is selected
+     * @param read read status
+     */
+    public void markChaptersRead(Observable<Chapter> selectedChapters, boolean read) {
+        add(selectedChapters
+                .subscribeOn(Schedulers.io())
+                .map(chapter -> {
+                    chapter.read = read;
+                    if (!read) chapter.last_page_read = 0;
+                    return chapter;
+                })
+                .toList()
+                .flatMap(chapters -> db.insertChapters(chapters).asRxObservable())
+                .observeOn(AndroidSchedulers.mainThread())
+                .subscribe());
+    }
 }

app/src/main/java/eu/kanade/tachiyomi/ui/setting/SettingsAboutFragment.java

@@ -6,6 +6,8 @@ import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;
 
+import com.afollestad.materialdialogs.MaterialDialog;
+
 import java.text.DateFormat;
 import java.text.ParseException;
 import java.text.SimpleDateFormat;
@@ -15,8 +17,23 @@ import java.util.TimeZone;
 
 import eu.kanade.tachiyomi.BuildConfig;
 import eu.kanade.tachiyomi.R;
+import eu.kanade.tachiyomi.data.updater.UpdateChecker;
+import eu.kanade.tachiyomi.data.updater.UpdateDownloader;
+import eu.kanade.tachiyomi.util.ToastUtil;
+import rx.Subscription;
+import rx.android.schedulers.AndroidSchedulers;
+import rx.schedulers.Schedulers;
 
 public class SettingsAboutFragment extends SettingsNestedFragment {
+    /**
+     * Checks for new releases
+     */
+    private UpdateChecker updateChecker;
+
+    /**
+     * The subscribtion service of the obtained release object
+     */
+    private Subscription releaseSubscription;
 
     public static SettingsNestedFragment newInstance(int resourcePreference, int resourceTitle) {
         SettingsNestedFragment fragment = new SettingsAboutFragment();
@@ -25,14 +42,36 @@ public class SettingsAboutFragment extends SettingsNestedFragment {
     }
 
     @Override
-    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedState) {
+    public void onCreate(Bundle savedInstanceState) {
+        //Check for update
+        updateChecker = new UpdateChecker(getActivity());
 
+        super.onCreate(savedInstanceState);
+    }
+
+    @Override
+    public void onDestroyView() {
+        if (releaseSubscription != null)
+            releaseSubscription.unsubscribe();
+
+        super.onDestroyView();
+    }
+
+    @Override
+    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedState) {
         Preference version = findPreference(getString(R.string.pref_version));
         Preference buildTime = findPreference(getString(R.string.pref_build_time));
 
         version.setSummary(BuildConfig.DEBUG ? "r" + BuildConfig.COMMIT_COUNT :
                 BuildConfig.VERSION_NAME);
 
+        //Set onClickListener to check for new version
+        version.setOnPreferenceClickListener(preference -> {
+            if (!BuildConfig.DEBUG && BuildConfig.INCLUDE_UPDATER)
+                checkVersion();
+            return true;
+        });
+
         buildTime.setSummary(getFormattedBuildTime());
 
         return super.onCreateView(inflater, container, savedState);
@@ -54,4 +93,40 @@ public class SettingsAboutFragment extends SettingsNestedFragment {
         }
         return "";
     }
+
+    /**
+     * Checks version and shows a user prompt when update available.
+     */
+    private void checkVersion() {
+        releaseSubscription = updateChecker.checkForApplicationUpdate()
+                .subscribeOn(Schedulers.io())
+                .observeOn(AndroidSchedulers.mainThread())
+                .subscribe(release -> {
+                    //Get version of latest release
+                    String newVersion = release.getVersion();
+                    newVersion = newVersion.replaceAll("[^\\d.]", "");
+
+                    //Check if latest version is different from current version
+                    if (!newVersion.equals(BuildConfig.VERSION_NAME)) {
+                        String downloadLink = release.getDownloadLink();
+                        String body = release.getChangeLog();
+
+                        //Create confirmation window
+                        new MaterialDialog.Builder(getActivity())
+                                .title(getString(R.string.update_check_title))
+                                .content(body)
+                                .positiveText(getString(R.string.update_check_confirm))
+                                .negativeText(getString(R.string.update_check_ignore))
+                                .onPositive((dialog, which) -> {
+                                    // User output that download has started
+                                    ToastUtil.showShort(getActivity(), getString(R.string.update_check_download_started));
+                                    // Start download
+                                    new UpdateDownloader(getActivity().getApplicationContext()).execute(downloadLink);
+                                })
+                                .show();
+                    } else {
+                        ToastUtil.showShort(getActivity(), getString(R.string.update_check_no_new_updates));
+                    }
+                }, Throwable::printStackTrace);
+    }
 }

app/src/main/java/eu/kanade/tachiyomi/ui/setting/SettingsAdvancedFragment.java

@@ -71,7 +71,7 @@ public class SettingsAdvancedFragment extends SettingsNestedFragment {
 
         subscriptions.add(Observable.defer(() -> Observable.from(files))
                 .concatMap(file -> {
-                    if (chapterCache.remove(file.getName())) {
+                    if (chapterCache.removeFileFromCache(file.getName())) {
                         deletedFiles.incrementAndGet();
                     }
                     return Observable.just(file);

app/src/main/java/eu/kanade/tachiyomi/ui/setting/SettingsDownloadsFragment.java

@@ -3,6 +3,7 @@ package eu.kanade.tachiyomi.ui.setting;
 import android.app.Activity;
 import android.content.Intent;
 import android.net.Uri;
+import android.os.Build;
 import android.os.Bundle;
 import android.preference.Preference;
 import android.support.v7.widget.RecyclerView;
@@ -61,6 +62,13 @@ public class SettingsDownloadsFragment extends SettingsNestedFragment {
         if (requestCode == DOWNLOAD_DIR_CODE && resultCode == Activity.RESULT_OK) {
             Uri uri = data.getData();
             preferences.setDownloadsDirectory(uri.getPath());
+
+            // Persist access permissions.
+            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {
+                getActivity().getContentResolver().takePersistableUriPermission(uri,
+                        Intent.FLAG_GRANT_READ_URI_PERMISSION |
+                        Intent.FLAG_GRANT_WRITE_URI_PERMISSION);
+            }
         }
     }
 

app/src/main/java/eu/kanade/tachiyomi/util/ChapterRecognition.java

@@ -10,12 +10,18 @@ import eu.kanade.tachiyomi.data.database.models.Manga;
 
 public class ChapterRecognition {
 
-    private static final Pattern p1 = Pattern.compile("ch[^0-9]?\\s*(\\d+[\\.,]?\\d*)");
+    private static final Pattern cleanWithToken = Pattern.compile("ch[^0-9]?\\s*(\\d+[\\.,]?\\d+)($|\\b)");
-    private static final Pattern p2 = Pattern.compile("(\\d+[\\.,]?\\d*)");
+    private static final Pattern uncleanWithToken = Pattern.compile("ch[^0-9]?\\s*(\\d+[\\.,]?\\d*)");
-    private static final Pattern p3 = Pattern.compile("(\\d+[\\.,]?\\d*\\s*:)");
+    private static final Pattern withAlphaPostfix = Pattern.compile("(\\d+[\\.,]?\\d*\\s*)([a-z])($|\\b)");
+    private static final Pattern cleanNumber = Pattern.compile("(\\d+[\\.,]?\\d+)($|\\b)");
+    private static final Pattern uncleanNumber = Pattern.compile("(\\d+[\\.,]?\\d*)");
+    private static final Pattern withColon = Pattern.compile("(\\d+[\\.,]?\\d*\\s*:)([^\\d]|$)");
+    private static final Pattern startingNumber = Pattern.compile("^(\\d+[\\.,]?\\d*)");
 
     private static final Pattern pUnwanted =
-            Pattern.compile("\\b(v|ver|vol|version|volume)\\.?\\s*\\d+\\b");
+            Pattern.compile("(\\b|\\d)(v|ver|vol|version|volume)\\.?\\s*\\d+\\b");
+    private static final Pattern pPart =
+            Pattern.compile("(\\b|\\d)part\\s*\\d+.+");
 
     public static void parseChapterNumber(Chapter chapter, Manga manga) {
         if (chapter.chapter_number != -1)
@@ -24,20 +30,34 @@ public class ChapterRecognition {
         String name = chapter.name.toLowerCase();
         Matcher matcher;
 
-        // Safest option, the chapter has a token prepended
+        // Safest option, the chapter has a token prepended and nothing at the end of the number
-        matcher = p1.matcher(name);
+        matcher = cleanWithToken.matcher(name);
+        if (matcher.find()) {
+            chapter.chapter_number = Float.parseFloat(matcher.group(1));
+            return;
+        }
+
+        // a number with a single alpha prefix is parsed as sub-chapter
+        matcher = withAlphaPostfix.matcher(name);
+        if (matcher.find()) {
+            chapter.chapter_number = Float.parseFloat(matcher.group(1)) + parseAlphaPostFix(matcher.group(2));
+            return;
+        }
+
+        // the chapter has a token prepended and something at the end of the number
+        matcher = uncleanWithToken.matcher(name);
         if (matcher.find()) {
             chapter.chapter_number = Float.parseFloat(matcher.group(1));
             return;
         }
 
         // Remove anything related to the volume or version
-        name = pUnwanted.matcher(name).replaceAll("");
+        name = pUnwanted.matcher(name).replaceAll("$1");
 
         List<Float> occurrences;
 
         // If there's only one number, use it
-        matcher = p2.matcher(name);
+        matcher = uncleanNumber.matcher(name);
         occurrences = getAllOccurrences(matcher);
         if (occurrences.size() == 1) {
             chapter.chapter_number =  occurrences.get(0);
@@ -45,7 +65,15 @@ public class ChapterRecognition {
         }
 
         // If it has a colon, the chapter number should be that one
-        matcher = p3.matcher(name);
+        matcher = withColon.matcher(name);
+        occurrences = getAllOccurrences(matcher);
+        if (occurrences.size() == 1) {
+            chapter.chapter_number =  occurrences.get(0);
+            return;
+        }
+
+        // Prefer numbers without anything appended
+        matcher = cleanNumber.matcher(name);
         occurrences = getAllOccurrences(matcher);
         if (occurrences.size() == 1) {
             chapter.chapter_number =  occurrences.get(0);
@@ -57,9 +85,9 @@ public class ChapterRecognition {
 
         // Try to remove the manga name from the chapter, and try again
         String mangaName = replaceIrrelevantCharacters(manga.title);
-        String nameWithoutManga = difference(mangaName, name);
+        String nameWithoutManga = difference(mangaName, name).trim();
         if (!nameWithoutManga.isEmpty()) {
-            matcher = p2.matcher(nameWithoutManga);
+            matcher = uncleanNumber.matcher(nameWithoutManga);
             occurrences = getAllOccurrences(matcher);
             if (occurrences.size() == 1) {
                 chapter.chapter_number =  occurrences.get(0);
@@ -69,6 +97,52 @@ public class ChapterRecognition {
 
         // TODO more checks (maybe levenshtein?)
 
+        // try splitting the name in parts an pick the first valid one
+        String[] nameParts = chapter.name.split("-");
+        Chapter dummyChapter = Chapter.create();
+        if (nameParts.length > 1) {
+            for (String part : nameParts) {
+                dummyChapter.name = part;
+                parseChapterNumber(dummyChapter, manga);
+                if (dummyChapter.chapter_number >= 0) {
+                    chapter.chapter_number = dummyChapter.chapter_number;
+                    return;
+                }
+            }
+        }
+
+        // Strip anything after "part xxx" and try that
+        matcher = pPart.matcher(name);
+        if (matcher.find()) {
+            name = pPart.matcher(name).replaceAll("$1");
+            dummyChapter.name = name;
+            parseChapterNumber(dummyChapter, manga);
+            if (dummyChapter.chapter_number >= 0) {
+                chapter.chapter_number = dummyChapter.chapter_number;
+                return;
+            }
+        }
+
+
+        // check for a number either at the start or right after the manga title
+        matcher = startingNumber.matcher(name);
+        if (matcher.find()) {
+            chapter.chapter_number = Float.parseFloat(matcher.group(1));
+            return;
+        }
+        matcher = startingNumber.matcher(nameWithoutManga);
+        if (matcher.find()) {
+            chapter.chapter_number = Float.parseFloat(matcher.group(1));
+            return;
+        }
+    }
+
+    /**
+     * x.a -> x.1, x.b -> x.2, etc
+     */
+    private static float parseAlphaPostFix(String postfix) {
+        char alpha = postfix.charAt(0);
+        return Float.parseFloat("0." + Integer.toString((int)alpha - 96));
     }
 
     public static List<Float> getAllOccurrences(Matcher matcher) {
@@ -76,7 +150,7 @@ public class ChapterRecognition {
         while (matcher.find()) {
             // Match again to get only numbers from the captured text
             String text = matcher.group();
-            Matcher m = p2.matcher(text);
+            Matcher m = uncleanNumber.matcher(text);
             if (m.find()) {
                 try {
                     Float value = Float.parseFloat(m.group(1));

app/src/main/java/eu/kanade/tachiyomi/util/EventBusHook.java

@@ -1,7 +0,0 @@
-package eu.kanade.tachiyomi.util;
-
-import java.lang.annotation.ElementType;
-import java.lang.annotation.Target;
-
-@Target({ElementType.METHOD})
-public @interface EventBusHook {}

app/src/main/java/eu/kanade/tachiyomi/util/RxPager.java

@@ -1,32 +1,26 @@
 package eu.kanade.tachiyomi.util;
 
+import android.util.Pair;
+
+import java.util.List;
+
 import rx.Observable;
+import rx.functions.Func1;
 import rx.subjects.PublishSubject;
 
-public class RxPager {
+public class RxPager<T> {
 
-    private final int initialPageCount;
+    private final PublishSubject<List<T>> results = PublishSubject.create();
-    private final PublishSubject<Integer> requests = PublishSubject.create();
     private int requestedCount;
 
-    public RxPager() {
+    public Observable<Pair<Integer, List<T>>> results() {
-        this(1);
+        requestedCount = 0;
+        return results.map(list -> Pair.create(requestedCount++, list));
     }
 
-    public RxPager(int initialPageCount) {
+    public Observable<List<T>> request(Func1<Integer, Observable<List<T>>> networkObservable) {
-        this.initialPageCount = initialPageCount;
+        return networkObservable.call(requestedCount).doOnNext(results::onNext);
     }
 
-    public void requestNext(int page) {
+}
-        requests.onNext(page);
-    }
 
-    public Observable<Integer> pages() {
-        return requests
-            .concatMap(targetPage -> targetPage <= requestedCount ?
-                    Observable.<Integer>empty() :
-                    Observable.range(requestedCount, targetPage - requestedCount))
-            .startWith(Observable.range(0, initialPageCount))
-            .doOnNext(it -> requestedCount = it + 1);
-    }
-}

app/src/main/java/eu/kanade/tachiyomi/util/UrlUtil.java

@@ -5,6 +5,10 @@ import java.net.URISyntaxException;
 
 public class UrlUtil {
 
+    private static final String JPG = ".jpg";
+    private static final String PNG = ".png";
+    private static final String GIF = ".gif";
+
     public static String getPath(String s) {
         try {
             URI uri = new URI(s);
@@ -18,4 +22,37 @@ public class UrlUtil {
             return s;
         }
     }
+
+    public static boolean isJpg(String url) {
+        return containsIgnoreCase(url, JPG);
+    }
+
+    public static boolean isPng(String url) {
+        return containsIgnoreCase(url, PNG);
+    }
+
+    public static boolean isGif(String url) {
+        return containsIgnoreCase(url, GIF);
+    }
+
+    public static boolean containsIgnoreCase(String src, String what) {
+        final int length = what.length();
+        if (length == 0)
+            return true; // Empty string is contained
+
+        final char firstLo = Character.toLowerCase(what.charAt(0));
+        final char firstUp = Character.toUpperCase(what.charAt(0));
+
+        for (int i = src.length() - length; i >= 0; i--) {
+            // Quick check before calling the more expensive regionMatches() method:
+            final char ch = src.charAt(i);
+            if (ch != firstLo && ch != firstUp)
+                continue;
+
+            if (src.regionMatches(true, i, what, 0, length))
+                return true;
+        }
+
+        return false;
+    }
 }