Categories improvements

app/src/main/java/eu/kanade/mangafeed/event/LibraryMangasEvent.java

@@ -0,0 +1,19 @@
+package eu.kanade.mangafeed.event;
+
+import java.util.List;
+import java.util.Map;
+
+import eu.kanade.mangafeed.data.database.models.Manga;
+
+public class LibraryMangasEvent {
+
+    private final Map<Integer, List<Manga>> mangas;
+
+    public LibraryMangasEvent(Map<Integer, List<Manga>> mangas) {
+        this.mangas = mangas;
+    }
+
+    public Map<Integer, List<Manga>> getMangas() {
+        return mangas;
+    }
+}

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

@@ -1,7 +1,6 @@
 package eu.kanade.mangafeed.ui.base.activity;
 
 import android.content.Context;
-import android.os.Build;
 import android.support.v7.app.AppCompatActivity;
 import android.support.v7.widget.Toolbar;
 import android.view.MenuItem;
@@ -36,11 +35,6 @@ public class BaseActivity extends AppCompatActivity {
             getSupportActionBar().setSubtitle(getString(titleResource));
     }
 
-    public void setToolbarElevation(int elevation) {
-        if (getSupportActionBar() != null && Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP)
-            getSupportActionBar().setElevation(elevation);
-    }
-
     public Context getActivity() {
         return this;
     }

app/src/main/java/eu/kanade/mangafeed/ui/library/LibraryAdapter.java

@@ -1,75 +1,40 @@
 package eu.kanade.mangafeed.ui.library;
 
-import android.view.View;
+import android.support.v4.app.Fragment;
-import android.view.ViewGroup;
+import android.support.v4.app.FragmentManager;
-import android.widget.Filter;
+import android.support.v4.app.FragmentStatePagerAdapter;
-import android.widget.Filterable;
 
 import java.util.List;
 
-import eu.kanade.mangafeed.data.database.models.Manga;
+import eu.kanade.mangafeed.data.database.models.Category;
-import rx.Observable;
-import uk.co.ribot.easyadapter.EasyAdapter;
 
-public class LibraryAdapter extends EasyAdapter<Manga> implements Filterable {
+class LibraryAdapter extends FragmentStatePagerAdapter {
 
-    List<Manga> mangas;
+    private List<Category> categories;
-    Filter filter;
-    private LibraryPresenter presenter;
 
-    public LibraryAdapter(LibraryFragment fragment) {
+    public LibraryAdapter(FragmentManager fm) {
-        super(fragment.getActivity(), LibraryHolder.class);
+        super(fm);
-        filter = new LibraryFilter();
-        presenter = fragment.getPresenter();
-    }
-
-    public void setNewItems(List<Manga> list) {
-        super.setItems(list);
-        mangas = list;
     }
 
     @Override
-    public Filter getFilter() {
+    public Fragment getItem(int position) {
-        return filter;
+        Category category = categories.get(position);
-    }
+        return LibraryCategoryFragment.newInstance(category);
-
-    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) {
+    public int getCount() {
-            setItems((List<Manga>) results.values);
+        return categories == null ? 0 : categories.size();
-        }
     }
 
     @Override
-    public View getView(int position, View convertView, ViewGroup parent) {
+    public CharSequence getPageTitle(int position) {
-        View view = super.getView(position, convertView, parent);
+        return categories.get(position).name;
-        LibraryHolder holder = (LibraryHolder) view.getTag();
-        Manga manga = getItem(position);
-        holder.loadCover(manga, presenter.sourceManager.get(manga.source), presenter.coverCache);
-        return view;
     }
+
+    public void setCategories(List<Category> categories) {
+        this.categories = categories;
+        notifyDataSetChanged();
+    }
+
 }

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

@@ -1,69 +1,76 @@
 package eu.kanade.mangafeed.ui.library;
 
-import android.support.annotation.Nullable;
+import android.view.View;
-import android.support.v4.app.Fragment;
+import android.view.ViewGroup;
-import android.support.v4.app.FragmentManager;
+import android.widget.Filter;
+import android.widget.Filterable;
 
 import java.util.List;
-import java.util.Map;
 
-import eu.kanade.mangafeed.data.database.models.Category;
 import eu.kanade.mangafeed.data.database.models.Manga;
-import eu.kanade.mangafeed.ui.reader.viewer.common.SmartFragmentStatePagerAdapter;
+import eu.kanade.mangafeed.ui.main.MainActivity;
+import rx.Observable;
+import uk.co.ribot.easyadapter.EasyAdapter;
 
-class LibraryCategoryAdapter extends SmartFragmentStatePagerAdapter {
+public class LibraryCategoryAdapter extends EasyAdapter<Manga> implements Filterable {
 
-    private LibraryFragment fragment;
+    List<Manga> mangas;
-    private List<Category> categories;
+    Filter filter;
-    private Map<Integer, List<Manga>> mangas;
+    private LibraryPresenter presenter;
 
-    public LibraryCategoryAdapter(LibraryFragment fragment, FragmentManager fm) {
+    public LibraryCategoryAdapter(MainActivity activity) {
-        super(fm);
+        super(activity, LibraryHolder.class);
-        this.fragment = fragment;
+        filter = new LibraryFilter();
+        presenter = ((LibraryFragment) activity.getActiveFragment()).getPresenter();
+    }
+
+    public void setNewItems(List<Manga> list) {
+        super.setItems(list);
+        mangas = list;
     }
 
     @Override
-    public Fragment getItem(int position) {
+    public Filter getFilter() {
-        Category category = categories.get(position);
+        return filter;
-        return LibraryCategoryFragment.newInstance(fragment, category,
+    }
-                mangas != null ? mangas.get(category.id) : null);
+
+    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 int getCount() {
+        public void publishResults(CharSequence constraint, FilterResults results) {
-        return categories == null ? 0 : categories.size();
+            setItems((List<Manga>) results.values);
+        }
     }
 
     @Override
-    public CharSequence getPageTitle(int position) {
+    public View getView(int position, View convertView, ViewGroup parent) {
-        return categories.get(position).name;
+        View view = super.getView(position, convertView, parent);
+        LibraryHolder holder = (LibraryHolder) view.getTag();
+        Manga manga = getItem(position);
+        holder.loadCover(manga, presenter.sourceManager.get(manga.source), presenter.coverCache);
+        return view;
     }
-
-    public void setCategories(List<Category> categories) {
-        this.categories = categories;
-        notifyDataSetChanged();
-    }
-
-    public void setMangasOnCategories(Map<Integer, List<Manga>> mangas) {
-        this.mangas = mangas;
-        for (Map.Entry<Integer, List<Manga>> entry : mangas.entrySet()) {
-            LibraryCategoryFragment fragment = getFragment(entry.getKey());
-            if (fragment != null) {
-                fragment.setMangas(entry.getValue());
-            }
-        }
-    }
-
-    @Nullable
-    public LibraryCategoryFragment getFragment(int categoryId) {
-        if (categories != null) {
-            for (int i = 0; i < categories.size(); i++) {
-                if (categories.get(i).id == categoryId) {
-                    return (LibraryCategoryFragment) getRegisteredFragment(i);
-                }
-            }
-        }
-        return null;
-    }
-
 }

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

@@ -2,7 +2,6 @@ package eu.kanade.mangafeed.ui.library;
 
 import android.content.Intent;
 import android.os.Bundle;
-import android.support.annotation.Nullable;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;
@@ -16,46 +15,61 @@ import butterknife.OnItemClick;
 import eu.kanade.mangafeed.R;
 import eu.kanade.mangafeed.data.database.models.Category;
 import eu.kanade.mangafeed.data.database.models.Manga;
+import eu.kanade.mangafeed.event.LibraryMangasEvent;
 import eu.kanade.mangafeed.ui.base.fragment.BaseFragment;
+import eu.kanade.mangafeed.ui.main.MainActivity;
 import eu.kanade.mangafeed.ui.manga.MangaActivity;
+import eu.kanade.mangafeed.util.EventBusHook;
+import icepick.Icepick;
+import icepick.State;
 
 public class LibraryCategoryFragment extends BaseFragment {
 
     @Bind(R.id.gridView) GridView grid;
 
-    private LibraryFragment parent;
+    protected LibraryCategoryAdapter adapter;
-    private LibraryAdapter adapter;
+    @State Category category;
-    private Category category;
-    private List<Manga> mangas;
 
-    public static LibraryCategoryFragment newInstance(LibraryFragment parent, Category category,
+    public static LibraryCategoryFragment newInstance(Category category) {
-                                                      List<Manga> mangas) {
         LibraryCategoryFragment fragment = new LibraryCategoryFragment();
-        fragment.initialize(parent, category, mangas);
+        fragment.category = category;
         return fragment;
     }
 
-    private void initialize(LibraryFragment parent, Category category, List<Manga> mangas) {
-        this.parent = parent;
-        this.category = category;
-        this.mangas = mangas;
-    }
-
     @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_category, container, false);
         ButterKnife.bind(this, view);
+        Icepick.restoreInstanceState(this, savedState);
 
-        adapter = new LibraryAdapter(parent);
+        adapter = new LibraryCategoryAdapter((MainActivity) getActivity());
         grid.setAdapter(adapter);
 
-        if (mangas != null) {
+        return view;
-            setMangas(mangas);
     }
 
-        return view;
+    @Override
+    public void onResume() {
+        super.onResume();
+        registerForStickyEvents();
+    }
+
+    @Override
+    public void onPause() {
+        unregisterForEvents();
+        super.onPause();
+    }
+
+    @Override
+    public void onSaveInstanceState(Bundle outState) {
+        Icepick.saveInstanceState(this, outState);
+        super.onSaveInstanceState(outState);
+    }
+
+    @EventBusHook
+    public void onEventMainThread(LibraryMangasEvent event) {
+        setMangas(event.getMangas().get(category.id));
     }
 
     @OnItemClick(R.id.gridView)
@@ -64,12 +78,15 @@ public class LibraryCategoryFragment extends BaseFragment {
                 getActivity(),
                 adapter.getItem(position)
         );
-        parent.getPresenter().onOpenManga();
         getActivity().startActivity(intent);
     }
 
     public void setMangas(List<Manga> mangas) {
+        if (mangas != null) {
             adapter.setNewItems(mangas);
+        } else {
+            adapter.getItems().clear();
+        }
     }
 
 }

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

@@ -2,6 +2,7 @@ package eu.kanade.mangafeed.ui.library;
 
 import android.content.Intent;
 import android.os.Bundle;
+import android.support.design.widget.AppBarLayout;
 import android.support.design.widget.TabLayout;
 import android.support.v4.view.ViewPager;
 import android.view.LayoutInflater;
@@ -13,23 +14,24 @@ import android.view.ViewGroup;
 
 import java.util.ArrayList;
 import java.util.List;
-import java.util.Map;
 
 import butterknife.Bind;
 import butterknife.ButterKnife;
 import eu.kanade.mangafeed.R;
 import eu.kanade.mangafeed.data.database.models.Category;
-import eu.kanade.mangafeed.data.database.models.Manga;
 import eu.kanade.mangafeed.data.sync.LibraryUpdateService;
 import eu.kanade.mangafeed.ui.base.fragment.BaseRxFragment;
+import eu.kanade.mangafeed.ui.main.MainActivity;
 import nucleus.factory.RequiresPresenter;
 
 @RequiresPresenter(LibraryPresenter.class)
 public class LibraryFragment extends BaseRxFragment<LibraryPresenter> {
 
-    @Bind(R.id.tabs) TabLayout tabs;
+    TabLayout tabs;
+    AppBarLayout appBar;
+
     @Bind(R.id.view_pager) ViewPager categoriesPager;
-    private LibraryCategoryAdapter adapter;
+    protected LibraryAdapter adapter;
 
     public static LibraryFragment newInstance() {
         return new LibraryFragment();
@@ -49,12 +51,23 @@ public class LibraryFragment extends BaseRxFragment<LibraryPresenter> {
         setToolbarTitle(getString(R.string.label_library));
         ButterKnife.bind(this, view);
 
-        adapter = new LibraryCategoryAdapter(this, getChildFragmentManager());
+        appBar = ((MainActivity) getActivity()).getAppBar();
+        tabs = (TabLayout) inflater.inflate(R.layout.tab_layout, appBar, false);
+        appBar.addView(tabs);
+
+
+        adapter = new LibraryAdapter(getChildFragmentManager());
         categoriesPager.setAdapter(adapter);
 
         return view;
     }
 
+    @Override
+    public void onDestroyView() {
+        appBar.removeView(tabs);
+        super.onDestroyView();
+    }
+
     @Override
     public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
         inflater.inflate(R.menu.library, menu);
@@ -75,14 +88,9 @@ public class LibraryFragment extends BaseRxFragment<LibraryPresenter> {
         return super.onOptionsItemSelected(item);
     }
 
-    public void onNextMangas(Map<Integer, List<Manga>> mangas) {
-        adapter.setMangasOnCategories(mangas);
-    }
-
     public void onNextCategories(List<Category> categories) {
         List<Category> actualCategories = new ArrayList<>();
 
-        // TODO should we always add this?
         Category defaultCat = Category.create("Default");
         defaultCat.id = 0;
         actualCategories.add(defaultCat);
@@ -90,6 +98,8 @@ public class LibraryFragment extends BaseRxFragment<LibraryPresenter> {
         actualCategories.addAll(categories);
         adapter.setCategories(actualCategories);
         tabs.setupWithViewPager(categoriesPager);
+
+        tabs.setVisibility(actualCategories.size() == 1 ? View.GONE : View.VISIBLE);
     }
 
 }

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

@@ -8,15 +8,15 @@ import java.util.Map;
 
 import javax.inject.Inject;
 
+import de.greenrobot.event.EventBus;
 import eu.kanade.mangafeed.data.cache.CoverCache;
 import eu.kanade.mangafeed.data.database.DatabaseHelper;
-import eu.kanade.mangafeed.data.database.models.Category;
 import eu.kanade.mangafeed.data.database.models.Manga;
 import eu.kanade.mangafeed.data.preference.PreferencesHelper;
 import eu.kanade.mangafeed.data.source.SourceManager;
+import eu.kanade.mangafeed.event.LibraryMangasEvent;
 import eu.kanade.mangafeed.ui.base.presenter.BasePresenter;
 import rx.Observable;
-import rx.android.schedulers.AndroidSchedulers;
 import rx.schedulers.Schedulers;
 
 public class LibraryPresenter extends BasePresenter<LibraryFragment> {
@@ -27,7 +27,6 @@ public class LibraryPresenter extends BasePresenter<LibraryFragment> {
     @Inject SourceManager sourceManager;
 
     private static final int GET_CATEGORIES = 1;
-    private static final int GET_MANGAS = 2;
 
     @Override
     protected void onCreate(Bundle savedState) {
@@ -37,20 +36,20 @@ public class LibraryPresenter extends BasePresenter<LibraryFragment> {
                 () -> db.getCategories().createObservable(),
                 LibraryFragment::onNextCategories);
 
-        restartableLatestCache(GET_MANGAS,
-                this::getLibraryMangasObservable,
-                LibraryFragment::onNextMangas);
-
         start(GET_CATEGORIES);
+
+        add(getLibraryMangasObservable()
+                .subscribe(mangas ->
+                        EventBus.getDefault().postSticky(new LibraryMangasEvent(mangas))));
     }
 
-    @Override
+    public Observable<Map<Integer, List<Manga>>> getLibraryMangasObservable() {
-    protected void onTakeView(LibraryFragment view) {
+        return db.getLibraryMangas().createObservable()
-        super.onTakeView(view);
+                .flatMap(mangas -> Observable.from(mangas)
-
+                        .groupBy(manga -> manga.category)
-        if (!isSubscribed(GET_MANGAS)) {
+                        .flatMap(group -> group.toList()
-            start(GET_MANGAS);
+                                .map(list -> Pair.create(group.getKey(), list)))
-        }
+                        .toMap(pair -> pair.first, pair -> pair.second));
     }
 
     public void deleteMangas(Observable<Manga> selectedMangas) {
@@ -62,17 +61,5 @@ public class LibraryPresenter extends BasePresenter<LibraryFragment> {
                 .subscribe());
     }
 
-    public Observable<Map<Integer, List<Manga>>> getLibraryMangasObservable() {
-        return db.getLibraryMangas().createObservable()
-                .flatMap(mangas -> Observable.from(mangas)
-                        .groupBy(manga -> manga.category)
-                        .flatMap(group -> group.toList()
-                                .map(list -> Pair.create(group.getKey(), list)))
-                        .toMap(pair -> pair.first, pair -> pair.second))
-                .observeOn(AndroidSchedulers.mainThread());
-    }
 
-    public void onOpenManga() {
-        stop(GET_MANGAS);
-    }
 }

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

@@ -2,6 +2,7 @@ package eu.kanade.mangafeed.ui.main;
 
 import android.content.Intent;
 import android.os.Bundle;
+import android.support.design.widget.AppBarLayout;
 import android.support.v4.app.Fragment;
 import android.support.v7.widget.Toolbar;
 import android.widget.FrameLayout;
@@ -22,6 +23,7 @@ import nucleus.view.ViewWithPresenter;
 
 public class MainActivity extends BaseActivity {
 
+    @Bind(R.id.appbar) AppBarLayout appBar;
     @Bind(R.id.toolbar) Toolbar toolbar;
 
     @Bind(R.id.drawer_container) FrameLayout container;
@@ -111,8 +113,16 @@ public class MainActivity extends BaseActivity {
         fragmentStack.replace(fragment);
     }
 
+    public Fragment getActiveFragment() {
+        return fragmentStack.peek();
+    }
+
     public Toolbar getToolbar() {
         return toolbar;
     }
 
+    public AppBarLayout getAppBar() {
+        return appBar;
+    }
+
 }

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

@@ -52,11 +52,10 @@ public class MangaActivity extends BaseRxActivity<MangaPresenter> {
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         App.get(this).getComponent().inject(this);
-        setContentView(R.layout.activity_manga_detail);
+        setContentView(R.layout.activity_manga);
         ButterKnife.bind(this);
 
         setupToolbar(toolbar);
-        setToolbarElevation(0);
 
         Intent intent = getIntent();
 

app/src/main/res/layout/activity_main.xml

@@ -3,16 +3,22 @@
     android:layout_height="match_parent"
     android:gravity="center">
 
-    <include
+    <android.support.design.widget.AppBarLayout
-        android:id="@+id/toolbar"
+        android:id="@+id/appbar"
-        layout="@layout/toolbar" />
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:theme="@style/ThemeOverlay.AppTheme.Dark">
+
+        <include layout="@layout/toolbar" />
+
+    </android.support.design.widget.AppBarLayout>
 
     <!-- the layout which will contain (host) the drawerLayout -->
     <FrameLayout
         android:id="@+id/drawer_container"
         android:layout_width="match_parent"
         android:layout_height="match_parent"
-        android:layout_below="@id/toolbar">
+        android:layout_below="@id/appbar">
 
         <!-- the layout which will be the content of the activity (which will be hosted inside the drawer (NOT the list of the drawer)) -->
         <FrameLayout

app/src/main/res/layout/activity_manga.xml

@@ -1,5 +1,4 @@
 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
-    xmlns:app="http://schemas.android.com/apk/res-auto"
     xmlns:tools="http://schemas.android.com/tools"
     android:layout_width="match_parent"
     android:layout_height="wrap_content"
@@ -14,14 +13,7 @@
 
         <include layout="@layout/toolbar" />
 
-        <android.support.design.widget.TabLayout
+        <include layout="@layout/tab_layout" />
-            android:id="@+id/tabs"
-            android:layout_width="match_parent"
-            android:layout_height="wrap_content"
-            android:theme="@style/ThemeOverlay.AppTheme.Dark"
-            app:tabGravity="fill"
-            android:background="@color/colorPrimary"
-            app:tabIndicatorColor="@color/white" />
 
     </android.support.design.widget.AppBarLayout>
 

app/src/main/res/layout/activity_preferences.xml

@@ -3,9 +3,7 @@
     android:orientation="vertical" android:layout_width="match_parent"
     android:layout_height="match_parent">
 
-    <include
+    <include layout="@layout/toolbar"/>
-        android:id="@+id/toolbar"
-        layout="@layout/toolbar"/>
 
     <FrameLayout
         android:id="@+id/settings_content"

app/src/main/res/layout/fragment_library.xml

@@ -1,27 +1,8 @@
 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
-             xmlns:app="http://schemas.android.com/apk/res-auto"
-             xmlns:tools="http://schemas.android.com/tools"
              android:layout_width="match_parent"
              android:layout_height="match_parent"
              android:orientation="vertical">
 
-    <android.support.design.widget.AppBarLayout
-        android:id="@+id/appbar"
-        android:layout_width="match_parent"
-        android:layout_height="wrap_content"
-        android:theme="@style/ThemeOverlay.AppTheme.Dark">
-
-        <android.support.design.widget.TabLayout
-            android:id="@+id/tabs"
-            android:layout_width="match_parent"
-            android:layout_height="wrap_content"
-            android:theme="@style/ThemeOverlay.AppTheme.Dark"
-            app:tabGravity="fill"
-            android:background="@color/colorPrimary"
-            app:tabIndicatorColor="@color/white" />
-
-    </android.support.design.widget.AppBarLayout>
-
     <android.support.v4.view.ViewPager
         android:layout_width="match_parent"
         android:layout_height="match_parent"

app/src/main/res/layout/tab_layout.xml

@@ -0,0 +1,12 @@
+<?xml version="1.0" encoding="utf-8"?>
+<android.support.design.widget.TabLayout
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    android:id="@+id/tabs"
+    android:layout_width="match_parent"
+    android:layout_height="wrap_content"
+    android:theme="@style/ThemeOverlay.AppTheme.Dark"
+    app:tabGravity="fill"
+    android:background="@color/colorPrimary"
+    android:elevation="4dp"
+    app:tabIndicatorColor="@color/white"/>