Allow sliding back on all activities.

app/src/main/AndroidManifest.xml

@@ -38,22 +38,22 @@
             android:name=".Activity.ReportActivity"
             android:label="@string/report_activity_label"
             android:parentActivityName=".Activity.MainActivity"
-            android:theme="@style/AppTheme.NoActionBar" />
+            android:theme="@style/AppTheme.Slidable" />
         <activity
             android:name=".Activity.SelectedSubredditsActivity"
             android:label="@string/selected_subeddits_activity_label"
             android:parentActivityName=".Activity.MainActivity"
-            android:theme="@style/AppTheme.NoActionBar" />
+            android:theme="@style/AppTheme.Slidable" />
         <activity
             android:name=".Activity.EditMultiRedditActivity"
             android:label="@string/edit_multi_reddit_activity_label"
             android:parentActivityName=".Activity.MainActivity"
-            android:theme="@style/AppTheme.NoActionBar" />
+            android:theme="@style/AppTheme.Slidable" />
         <activity
             android:name=".Activity.ThemePreviewActivity"
             android:label="@string/theme_preview_activity_label"
             android:parentActivityName=".Activity.MainActivity"
-            android:theme="@style/AppTheme.NoActionBarWithTranslucentWindow" />
+            android:theme="@style/AppTheme.SlidableWithTranslucentWindow" />
         <activity
             android:name=".Activity.CustomThemeListingActivity"
             android:label="@string/custom_theme_listing_activity_label"
@@ -68,27 +68,27 @@
             android:name=".Activity.SubredditMultiselectionActivity"
             android:label="@string/subreddit_multiselection_activity_label"
             android:parentActivityName=".Activity.MainActivity"
-            android:theme="@style/AppTheme.NoActionBar" />
+            android:theme="@style/AppTheme.Slidable" />
         <activity
             android:name=".Activity.CreateMultiRedditActivity"
             android:label="@string/create_multi_reddit_activity_label"
             android:parentActivityName=".Activity.MainActivity"
-            android:theme="@style/AppTheme.NoActionBar"
+            android:theme="@style/AppTheme.Slidable"
             android:windowSoftInputMode="adjustResize" />
         <activity
             android:name=".Activity.ViewMultiRedditDetailActivity"
             android:parentActivityName=".Activity.MainActivity"
-            android:theme="@style/AppTheme.NoActionBar" />
+            android:theme="@style/AppTheme.Slidable" />
         <activity
             android:name=".Activity.MultiRedditListingActivity"
             android:label="@string/multi_reddit_listing_activity_label"
             android:parentActivityName=".Activity.MainActivity"
-            android:theme="@style/AppTheme.NoActionBar" />
+            android:theme="@style/AppTheme.Slidable" />
         <activity
             android:name=".Activity.AccountSavedThingActivity"
             android:label="@string/account_saved_thing_activity_label"
             android:parentActivityName=".Activity.MainActivity"
-            android:theme="@style/AppTheme.NoActionBar" />
+            android:theme="@style/AppTheme.Slidable" />
         <activity android:name=".Activity.ShareDataResolverActivity">
             <intent-filter>
                 <action android:name="android.intent.action.SEND" />
@@ -121,32 +121,32 @@
             android:name=".Activity.ViewMessageActivity"
             android:label="@string/view_message_activity_label"
             android:parentActivityName=".Activity.MainActivity"
-            android:theme="@style/AppTheme.NoActionBar" />
+            android:theme="@style/AppTheme.Slidable" />
         <activity
             android:name=".Activity.AccountPostsActivity"
             android:parentActivityName=".Activity.MainActivity"
-            android:theme="@style/AppTheme.NoActionBar" />
+            android:theme="@style/AppTheme.Slidable" />
         <activity
             android:name=".Activity.EditCommentActivity"
             android:label="@string/edit_comment_activity_label"
             android:parentActivityName=".Activity.MainActivity"
-            android:theme="@style/AppTheme.NoActionBar"
+            android:theme="@style/AppTheme.Slidable"
             android:windowSoftInputMode="adjustResize" />
         <activity
             android:name=".Activity.EditPostActivity"
             android:label="@string/edit_post_activity_label"
             android:parentActivityName=".Activity.MainActivity"
-            android:theme="@style/AppTheme.NoActionBar"
+            android:theme="@style/AppTheme.Slidable"
             android:windowSoftInputMode="adjustResize" />
         <activity
             android:name=".Activity.FilteredThingActivity"
             android:parentActivityName=".Activity.MainActivity"
-            android:theme="@style/AppTheme.NoActionBar" />
+            android:theme="@style/AppTheme.Slidable" />
         <activity
             android:name=".Activity.SearchSubredditsResultActivity"
             android:label="@string/search_subreddits_activity_label"
             android:parentActivityName=".Activity.MainActivity"
-            android:theme="@style/AppTheme.NoActionBar" />
+            android:theme="@style/AppTheme.Slidable" />
         <activity android:name=".Activity.LinkResolverActivity">
             <intent-filter>
                 <action android:name="android.intent.action.VIEW" />
@@ -220,57 +220,57 @@
             android:name=".Activity.SearchActivity"
             android:label="@string/search_activity_label"
             android:parentActivityName=".Activity.MainActivity"
-            android:theme="@style/AppTheme.NoActionBar" />
+            android:theme="@style/AppTheme.Slidable" />
         <activity
             android:name=".Activity.RulesActivity"
             android:label="@string/rules_activity_label"
             android:parentActivityName=".Activity.MainActivity"
-            android:theme="@style/AppTheme.NoActionBar" />
+            android:theme="@style/AppTheme.Slidable" />
         <activity
             android:name=".Activity.PostVideoActivity"
             android:label="@string/post_video_activity_label"
             android:parentActivityName=".Activity.MainActivity"
-            android:theme="@style/AppTheme.NoActionBar"
+            android:theme="@style/AppTheme.Slidable"
             android:windowSoftInputMode="adjustResize" />
         <activity
             android:name=".Activity.PostImageActivity"
             android:label="@string/post_image_activity_label"
             android:parentActivityName=".Activity.MainActivity"
-            android:theme="@style/AppTheme.NoActionBar"
+            android:theme="@style/AppTheme.Slidable"
             android:windowSoftInputMode="adjustResize" />
         <activity
             android:name=".Activity.PostLinkActivity"
             android:label="@string/post_link_activity_label"
             android:parentActivityName=".Activity.MainActivity"
-            android:theme="@style/AppTheme.NoActionBar"
+            android:theme="@style/AppTheme.Slidable"
             android:windowSoftInputMode="adjustResize" />
         <activity
             android:name=".Activity.SubscribedThingListingActivity"
             android:label="@string/subscriptions"
             android:parentActivityName=".Activity.MainActivity"
-            android:theme="@style/AppTheme.NoActionBar" />
+            android:theme="@style/AppTheme.Slidable" />
         <activity
             android:name=".Activity.SubredditSelectionActivity"
             android:label="@string/subreddit_selection_activity_label"
             android:parentActivityName=".Activity.MainActivity"
-            android:theme="@style/AppTheme.NoActionBar" />
+            android:theme="@style/AppTheme.Slidable" />
         <activity
             android:name=".Activity.PostTextActivity"
             android:label="@string/post_text_activity_label"
             android:parentActivityName=".Activity.MainActivity"
-            android:theme="@style/AppTheme.NoActionBar"
+            android:theme="@style/AppTheme.Slidable"
             android:windowSoftInputMode="adjustResize" />
         <activity
             android:name=".Activity.CommentActivity"
             android:label="@string/comment_activity_label"
             android:parentActivityName=".Activity.MainActivity"
-            android:theme="@style/AppTheme.NoActionBar"
+            android:theme="@style/AppTheme.Slidable"
             android:windowSoftInputMode="adjustResize" />
         <activity
             android:name=".Activity.SearchResultActivity"
             android:label="@string/search_activity_label"
             android:parentActivityName=".Activity.MainActivity"
-            android:theme="@style/AppTheme.NoActionBar" />
+            android:theme="@style/AppTheme.Slidable" />
         <activity
             android:name=".Activity.MainActivity"
             android:label="@string/application_name"
@@ -285,7 +285,7 @@
             android:name=".Activity.LoginActivity"
             android:label="@string/login_activity_label"
             android:parentActivityName=".Activity.MainActivity"
-            android:theme="@style/AppTheme.NoActionBar" />
+            android:theme="@style/AppTheme.Slidable" />
         <activity
             android:name=".Activity.ViewImageOrGifActivity"
             android:parentActivityName=".Activity.MainActivity"
@@ -298,15 +298,15 @@
         <activity
             android:name=".Activity.ViewPostDetailActivity"
             android:parentActivityName=".Activity.MainActivity"
-            android:theme="@style/AppTheme.NoActionBarWithTransparentBackground" />
+            android:theme="@style/AppTheme.Slidable" />
         <activity
             android:name=".Activity.ViewSubredditDetailActivity"
             android:parentActivityName=".Activity.MainActivity"
-            android:theme="@style/AppTheme.NoActionBarWithTranslucentWindow" />
+            android:theme="@style/AppTheme.SlidableWithTranslucentWindow" />
         <activity
             android:name=".Activity.ViewUserDetailActivity"
             android:parentActivityName=".Activity.MainActivity"
-            android:theme="@style/AppTheme.NoActionBarWithTranslucentWindow" />
+            android:theme="@style/AppTheme.SlidableWithTranslucentWindow" />
 
         <provider
             android:name="androidx.core.content.FileProvider"

app/src/main/java/ml/docilealligator/infinityforreddit/Activity/AccountPostsActivity.java

@@ -16,6 +16,7 @@ import androidx.fragment.app.Fragment;
 
 import com.google.android.material.appbar.AppBarLayout;
 import com.google.android.material.appbar.CollapsingToolbarLayout;
+import com.r0adkll.slidr.Slidr;
 
 import org.greenrobot.eventbus.EventBus;
 import org.greenrobot.eventbus.Subscribe;
@@ -94,6 +95,10 @@ public class AccountPostsActivity extends BaseActivity implements SortTypeSelect
 
         applyCustomTheme();
 
+        if (mSharedPreferences.getBoolean(SharedPreferencesUtils.SWIPE_RIGHT_TO_GO_BACK_FROM_POST_DETAIL, true)) {
+            Slidr.attach(this);
+        }
+
         if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
             Window window = getWindow();
 

app/src/main/java/ml/docilealligator/infinityforreddit/Activity/AccountSavedThingActivity.java

@@ -21,6 +21,7 @@ import androidx.viewpager.widget.ViewPager;
 import com.google.android.material.appbar.AppBarLayout;
 import com.google.android.material.appbar.CollapsingToolbarLayout;
 import com.google.android.material.tabs.TabLayout;
+import com.r0adkll.slidr.Slidr;
 
 import org.greenrobot.eventbus.EventBus;
 import org.greenrobot.eventbus.Subscribe;
@@ -42,6 +43,7 @@ import ml.docilealligator.infinityforreddit.Infinity;
 import ml.docilealligator.infinityforreddit.Post.PostDataSource;
 import ml.docilealligator.infinityforreddit.R;
 import ml.docilealligator.infinityforreddit.RedditDataRoomDatabase;
+import ml.docilealligator.infinityforreddit.Utils.SharedPreferencesUtils;
 import retrofit2.Retrofit;
 
 public class AccountSavedThingActivity extends BaseActivity implements ActivityToolbarInterface {
@@ -95,6 +97,10 @@ public class AccountSavedThingActivity extends BaseActivity implements ActivityT
 
         applyCustomTheme();
 
+        if (mSharedPreferences.getBoolean(SharedPreferencesUtils.SWIPE_RIGHT_TO_GO_BACK_FROM_POST_DETAIL, true)) {
+            Slidr.attach(this);
+        }
+
         if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
             Window window = getWindow();
 

app/src/main/java/ml/docilealligator/infinityforreddit/Activity/CommentActivity.java

@@ -27,6 +27,7 @@ import androidx.recyclerview.widget.RecyclerView;
 import com.google.android.material.appbar.AppBarLayout;
 import com.google.android.material.dialog.MaterialAlertDialogBuilder;
 import com.google.android.material.snackbar.Snackbar;
+import com.r0adkll.slidr.Slidr;
 
 import org.commonmark.ext.gfm.tables.TableBlock;
 import org.greenrobot.eventbus.EventBus;
@@ -56,6 +57,7 @@ import ml.docilealligator.infinityforreddit.Infinity;
 import ml.docilealligator.infinityforreddit.R;
 import ml.docilealligator.infinityforreddit.RedditDataRoomDatabase;
 import ml.docilealligator.infinityforreddit.SendComment;
+import ml.docilealligator.infinityforreddit.Utils.SharedPreferencesUtils;
 import ml.docilealligator.infinityforreddit.Utils.Utils;
 import retrofit2.Retrofit;
 
@@ -122,6 +124,10 @@ public class CommentActivity extends BaseActivity {
 
         applyCustomTheme();
 
+        if (mSharedPreferences.getBoolean(SharedPreferencesUtils.SWIPE_RIGHT_TO_GO_BACK_FROM_POST_DETAIL, true)) {
+            Slidr.attach(this);
+        }
+
         if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M && isChangeStatusBarIconColor()) {
             addOnOffsetChangedListener(appBarLayout);
         }

app/src/main/java/ml/docilealligator/infinityforreddit/Activity/CreateMultiRedditActivity.java

@@ -20,6 +20,7 @@ import androidx.coordinatorlayout.widget.CoordinatorLayout;
 
 import com.google.android.material.appbar.AppBarLayout;
 import com.google.android.material.snackbar.Snackbar;
+import com.r0adkll.slidr.Slidr;
 
 import java.util.ArrayList;
 
@@ -35,6 +36,7 @@ import ml.docilealligator.infinityforreddit.MultiReddit.CreateMultiReddit;
 import ml.docilealligator.infinityforreddit.MultiReddit.MultiRedditJSONModel;
 import ml.docilealligator.infinityforreddit.R;
 import ml.docilealligator.infinityforreddit.RedditDataRoomDatabase;
+import ml.docilealligator.infinityforreddit.Utils.SharedPreferencesUtils;
 import retrofit2.Retrofit;
 
 public class CreateMultiRedditActivity extends BaseActivity {
@@ -91,6 +93,10 @@ public class CreateMultiRedditActivity extends BaseActivity {
 
         applyCustomTheme();
 
+        if (mSharedPreferences.getBoolean(SharedPreferencesUtils.SWIPE_RIGHT_TO_GO_BACK_FROM_POST_DETAIL, true)) {
+            Slidr.attach(this);
+        }
+
         if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M && isChangeStatusBarIconColor()) {
             addOnOffsetChangedListener(appBarLayout);
         }

app/src/main/java/ml/docilealligator/infinityforreddit/Activity/CustomThemeListingActivity.java

@@ -38,12 +38,12 @@ import ml.docilealligator.infinityforreddit.AsyncTask.ChangeThemeNameAsyncTask;
 import ml.docilealligator.infinityforreddit.AsyncTask.DeleteThemeAsyncTask;
 import ml.docilealligator.infinityforreddit.AsyncTask.GetCustomThemeAsyncTask;
 import ml.docilealligator.infinityforreddit.AsyncTask.InsertCustomThemeAsyncTask;
+import ml.docilealligator.infinityforreddit.BottomSheetFragment.CreateThemeBottomSheetFragment;
+import ml.docilealligator.infinityforreddit.BottomSheetFragment.CustomThemeOptionsBottomSheetFragment;
 import ml.docilealligator.infinityforreddit.CustomTheme.CustomTheme;
 import ml.docilealligator.infinityforreddit.CustomTheme.CustomThemeViewModel;
 import ml.docilealligator.infinityforreddit.CustomTheme.CustomThemeWrapper;
 import ml.docilealligator.infinityforreddit.Event.RecreateActivityEvent;
-import ml.docilealligator.infinityforreddit.BottomSheetFragment.CreateThemeBottomSheetFragment;
-import ml.docilealligator.infinityforreddit.BottomSheetFragment.CustomThemeOptionsBottomSheetFragment;
 import ml.docilealligator.infinityforreddit.Infinity;
 import ml.docilealligator.infinityforreddit.R;
 import ml.docilealligator.infinityforreddit.RedditDataRoomDatabase;
@@ -260,7 +260,7 @@ public class CustomThemeListingActivity extends BaseActivity implements
                     !clipboard.getPrimaryClipDescription().hasMimeType(MIMETYPE_TEXT_PLAIN)) {
                 // since the clipboard has data but it is not plain text
                 Snackbar.make(coordinatorLayout, R.string.no_data_in_clipboard, Snackbar.LENGTH_SHORT).show();
-            } else if (clipboard.getPrimaryClip() != null){
+            } else if (clipboard.getPrimaryClip() != null) {
                 ClipData.Item item = clipboard.getPrimaryClip().getItemAt(0);
                 String json = item.getText().toString();
                 try {

app/src/main/java/ml/docilealligator/infinityforreddit/Activity/EditCommentActivity.java

@@ -18,6 +18,7 @@ import androidx.coordinatorlayout.widget.CoordinatorLayout;
 import com.google.android.material.appbar.AppBarLayout;
 import com.google.android.material.dialog.MaterialAlertDialogBuilder;
 import com.google.android.material.snackbar.Snackbar;
+import com.r0adkll.slidr.Slidr;
 
 import org.greenrobot.eventbus.EventBus;
 import org.greenrobot.eventbus.Subscribe;
@@ -36,6 +37,7 @@ import ml.docilealligator.infinityforreddit.Infinity;
 import ml.docilealligator.infinityforreddit.R;
 import ml.docilealligator.infinityforreddit.API.RedditAPI;
 import ml.docilealligator.infinityforreddit.Utils.APIUtils;
+import ml.docilealligator.infinityforreddit.Utils.SharedPreferencesUtils;
 import ml.docilealligator.infinityforreddit.Utils.Utils;
 import retrofit2.Call;
 import retrofit2.Callback;
@@ -87,6 +89,10 @@ public class EditCommentActivity extends BaseActivity {
 
         applyCustomTheme();
 
+        if (mSharedPreferences.getBoolean(SharedPreferencesUtils.SWIPE_RIGHT_TO_GO_BACK_FROM_POST_DETAIL, true)) {
+            Slidr.attach(this);
+        }
+
         if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M && isChangeStatusBarIconColor()) {
             addOnOffsetChangedListener(appBarLayout);
         }

app/src/main/java/ml/docilealligator/infinityforreddit/Activity/EditMultiRedditActivity.java

@@ -22,6 +22,7 @@ import androidx.coordinatorlayout.widget.CoordinatorLayout;
 
 import com.google.android.material.appbar.AppBarLayout;
 import com.google.android.material.snackbar.Snackbar;
+import com.r0adkll.slidr.Slidr;
 
 import javax.inject.Inject;
 import javax.inject.Named;
@@ -37,6 +38,7 @@ import ml.docilealligator.infinityforreddit.MultiReddit.MultiReddit;
 import ml.docilealligator.infinityforreddit.MultiReddit.MultiRedditJSONModel;
 import ml.docilealligator.infinityforreddit.R;
 import ml.docilealligator.infinityforreddit.RedditDataRoomDatabase;
+import ml.docilealligator.infinityforreddit.Utils.SharedPreferencesUtils;
 import retrofit2.Retrofit;
 
 public class EditMultiRedditActivity extends BaseActivity {
@@ -100,6 +102,10 @@ public class EditMultiRedditActivity extends BaseActivity {
 
         applyCustomTheme();
 
+        if (mSharedPreferences.getBoolean(SharedPreferencesUtils.SWIPE_RIGHT_TO_GO_BACK_FROM_POST_DETAIL, true)) {
+            Slidr.attach(this);
+        }
+
         if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M && isChangeStatusBarIconColor()) {
             addOnOffsetChangedListener(appBarLayout);
         }

app/src/main/java/ml/docilealligator/infinityforreddit/Activity/EditPostActivity.java

@@ -20,6 +20,7 @@ import androidx.coordinatorlayout.widget.CoordinatorLayout;
 import com.google.android.material.appbar.AppBarLayout;
 import com.google.android.material.dialog.MaterialAlertDialogBuilder;
 import com.google.android.material.snackbar.Snackbar;
+import com.r0adkll.slidr.Slidr;
 
 import org.greenrobot.eventbus.EventBus;
 import org.greenrobot.eventbus.Subscribe;
@@ -38,6 +39,7 @@ import ml.docilealligator.infinityforreddit.Infinity;
 import ml.docilealligator.infinityforreddit.R;
 import ml.docilealligator.infinityforreddit.API.RedditAPI;
 import ml.docilealligator.infinityforreddit.Utils.APIUtils;
+import ml.docilealligator.infinityforreddit.Utils.SharedPreferencesUtils;
 import retrofit2.Call;
 import retrofit2.Callback;
 import retrofit2.Response;
@@ -89,6 +91,10 @@ public class EditPostActivity extends BaseActivity {
 
         applyCustomTheme();
 
+        if (mSharedPreferences.getBoolean(SharedPreferencesUtils.SWIPE_RIGHT_TO_GO_BACK_FROM_POST_DETAIL, true)) {
+            Slidr.attach(this);
+        }
+
         if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M && isChangeStatusBarIconColor()) {
             addOnOffsetChangedListener(appBarLayout);
         }

app/src/main/java/ml/docilealligator/infinityforreddit/Activity/FilteredThingActivity.java

@@ -16,6 +16,7 @@ import androidx.fragment.app.Fragment;
 
 import com.google.android.material.appbar.AppBarLayout;
 import com.google.android.material.appbar.CollapsingToolbarLayout;
+import com.r0adkll.slidr.Slidr;
 
 import org.greenrobot.eventbus.EventBus;
 import org.greenrobot.eventbus.Subscribe;
@@ -109,6 +110,10 @@ public class FilteredThingActivity extends BaseActivity implements SortTypeSelec
 
         applyCustomTheme();
 
+        if (mSharedPreferences.getBoolean(SharedPreferencesUtils.SWIPE_RIGHT_TO_GO_BACK_FROM_POST_DETAIL, true)) {
+            Slidr.attach(this);
+        }
+
         if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
             Window window = getWindow();
 

app/src/main/java/ml/docilealligator/infinityforreddit/Activity/LoginActivity.java

@@ -18,6 +18,7 @@ import androidx.annotation.NonNull;
 import androidx.appcompat.widget.Toolbar;
 
 import com.google.android.material.appbar.AppBarLayout;
+import com.r0adkll.slidr.Slidr;
 
 import org.json.JSONException;
 import org.json.JSONObject;
@@ -39,6 +40,7 @@ import ml.docilealligator.infinityforreddit.R;
 import ml.docilealligator.infinityforreddit.API.RedditAPI;
 import ml.docilealligator.infinityforreddit.RedditDataRoomDatabase;
 import ml.docilealligator.infinityforreddit.Utils.APIUtils;
+import ml.docilealligator.infinityforreddit.Utils.SharedPreferencesUtils;
 import retrofit2.Call;
 import retrofit2.Callback;
 import retrofit2.Response;
@@ -85,6 +87,10 @@ public class LoginActivity extends BaseActivity {
 
         applyCustomTheme();
 
+        if (mSharedPreferences.getBoolean(SharedPreferencesUtils.SWIPE_RIGHT_TO_GO_BACK_FROM_POST_DETAIL, true)) {
+            Slidr.attach(this);
+        }
+
         setSupportActionBar(toolbar);
 
         getSupportActionBar().setDisplayHomeAsUpEnabled(true);

app/src/main/java/ml/docilealligator/infinityforreddit/Activity/MainActivity.java

@@ -583,11 +583,7 @@ public class MainActivity extends BaseActivity implements SortTypeSelectionCallb
         viewPager.setOffscreenPageLimit(3);
         tabLayout.setupWithViewPager(viewPager);
 
-        viewPager.addOnPageChangeListener(new ViewPager.OnPageChangeListener() {
+        viewPager.addOnPageChangeListener(new ViewPager.SimpleOnPageChangeListener() {
-            @Override
-            public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
-            }
-
             @Override
             public void onPageSelected(int position) {
                 if (mAccessToken != null) {
@@ -605,10 +601,6 @@ public class MainActivity extends BaseActivity implements SortTypeSelectionCallb
                 }
                 sectionsPagerAdapter.displaySortTypeInToolbar();
             }
-
-            @Override
-            public void onPageScrollStateChanged(int state) {
-            }
         });
 
         loadSubscriptions();

app/src/main/java/ml/docilealligator/infinityforreddit/Activity/MultiRedditListingActivity.java

@@ -26,6 +26,7 @@ import com.bumptech.glide.RequestManager;
 import com.google.android.material.appbar.AppBarLayout;
 import com.google.android.material.dialog.MaterialAlertDialogBuilder;
 import com.google.android.material.floatingactionbutton.FloatingActionButton;
+import com.r0adkll.slidr.Slidr;
 
 import java.util.ArrayList;
 
@@ -46,6 +47,7 @@ import ml.docilealligator.infinityforreddit.MultiReddit.MultiReddit;
 import ml.docilealligator.infinityforreddit.MultiReddit.MultiRedditViewModel;
 import ml.docilealligator.infinityforreddit.R;
 import ml.docilealligator.infinityforreddit.RedditDataRoomDatabase;
+import ml.docilealligator.infinityforreddit.Utils.SharedPreferencesUtils;
 import retrofit2.Retrofit;
 
 public class MultiRedditListingActivity extends BaseActivity {
@@ -102,6 +104,10 @@ public class MultiRedditListingActivity extends BaseActivity {
 
         applyCustomTheme();
 
+        if (mSharedPreferences.getBoolean(SharedPreferencesUtils.SWIPE_RIGHT_TO_GO_BACK_FROM_POST_DETAIL, true)) {
+            Slidr.attach(this);
+        }
+
         if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
             Window window = getWindow();
 

app/src/main/java/ml/docilealligator/infinityforreddit/Activity/PostImageActivity.java

@@ -32,6 +32,7 @@ import com.google.android.material.dialog.MaterialAlertDialogBuilder;
 import com.google.android.material.floatingactionbutton.FloatingActionButton;
 import com.google.android.material.snackbar.Snackbar;
 import com.libRG.CustomTextView;
+import com.r0adkll.slidr.Slidr;
 
 import org.greenrobot.eventbus.EventBus;
 import org.greenrobot.eventbus.Subscribe;
@@ -56,6 +57,7 @@ import ml.docilealligator.infinityforreddit.Infinity;
 import ml.docilealligator.infinityforreddit.R;
 import ml.docilealligator.infinityforreddit.RedditDataRoomDatabase;
 import ml.docilealligator.infinityforreddit.Service.SubmitPostService;
+import ml.docilealligator.infinityforreddit.Utils.SharedPreferencesUtils;
 import pl.droidsonroids.gif.GifImageView;
 import retrofit2.Retrofit;
 
@@ -175,6 +177,10 @@ public class PostImageActivity extends BaseActivity implements FlairBottomSheetF
 
         applyCustomTheme();
 
+        if (mSharedPreferences.getBoolean(SharedPreferencesUtils.SWIPE_RIGHT_TO_GO_BACK_FROM_POST_DETAIL, true)) {
+            Slidr.attach(this);
+        }
+
         if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M && isChangeStatusBarIconColor()) {
             addOnOffsetChangedListener(appBarLayout);
         }

app/src/main/java/ml/docilealligator/infinityforreddit/Activity/PostLinkActivity.java

@@ -25,6 +25,7 @@ import com.google.android.material.appbar.AppBarLayout;
 import com.google.android.material.dialog.MaterialAlertDialogBuilder;
 import com.google.android.material.snackbar.Snackbar;
 import com.libRG.CustomTextView;
+import com.r0adkll.slidr.Slidr;
 
 import org.greenrobot.eventbus.EventBus;
 import org.greenrobot.eventbus.Subscribe;
@@ -47,6 +48,7 @@ import ml.docilealligator.infinityforreddit.R;
 import ml.docilealligator.infinityforreddit.RedditDataRoomDatabase;
 import ml.docilealligator.infinityforreddit.Service.SubmitPostService;
 import ml.docilealligator.infinityforreddit.Utils.APIUtils;
+import ml.docilealligator.infinityforreddit.Utils.SharedPreferencesUtils;
 import pl.droidsonroids.gif.GifImageView;
 import retrofit2.Retrofit;
 
@@ -150,6 +152,10 @@ public class PostLinkActivity extends BaseActivity implements FlairBottomSheetFr
 
         applyCustomTheme();
 
+        if (mSharedPreferences.getBoolean(SharedPreferencesUtils.SWIPE_RIGHT_TO_GO_BACK_FROM_POST_DETAIL, true)) {
+            Slidr.attach(this);
+        }
+
         if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M && isChangeStatusBarIconColor()) {
             addOnOffsetChangedListener(appBarLayout);
         }

app/src/main/java/ml/docilealligator/infinityforreddit/Activity/PostTextActivity.java

@@ -25,6 +25,7 @@ import com.google.android.material.appbar.AppBarLayout;
 import com.google.android.material.dialog.MaterialAlertDialogBuilder;
 import com.google.android.material.snackbar.Snackbar;
 import com.libRG.CustomTextView;
+import com.r0adkll.slidr.Slidr;
 
 import org.greenrobot.eventbus.EventBus;
 import org.greenrobot.eventbus.Subscribe;
@@ -47,6 +48,7 @@ import ml.docilealligator.infinityforreddit.R;
 import ml.docilealligator.infinityforreddit.RedditDataRoomDatabase;
 import ml.docilealligator.infinityforreddit.Service.SubmitPostService;
 import ml.docilealligator.infinityforreddit.Utils.APIUtils;
+import ml.docilealligator.infinityforreddit.Utils.SharedPreferencesUtils;
 import pl.droidsonroids.gif.GifImageView;
 import retrofit2.Retrofit;
 
@@ -150,6 +152,10 @@ public class PostTextActivity extends BaseActivity implements FlairBottomSheetFr
 
         applyCustomTheme();
 
+        if (mSharedPreferences.getBoolean(SharedPreferencesUtils.SWIPE_RIGHT_TO_GO_BACK_FROM_POST_DETAIL, true)) {
+            Slidr.attach(this);
+        }
+
         if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M && isChangeStatusBarIconColor()) {
             addOnOffsetChangedListener(appBarLayout);
         }

app/src/main/java/ml/docilealligator/infinityforreddit/Activity/PostVideoActivity.java

@@ -37,6 +37,7 @@ import com.google.android.material.dialog.MaterialAlertDialogBuilder;
 import com.google.android.material.floatingactionbutton.FloatingActionButton;
 import com.google.android.material.snackbar.Snackbar;
 import com.libRG.CustomTextView;
+import com.r0adkll.slidr.Slidr;
 
 import org.greenrobot.eventbus.EventBus;
 import org.greenrobot.eventbus.Subscribe;
@@ -58,6 +59,7 @@ import ml.docilealligator.infinityforreddit.Infinity;
 import ml.docilealligator.infinityforreddit.R;
 import ml.docilealligator.infinityforreddit.RedditDataRoomDatabase;
 import ml.docilealligator.infinityforreddit.Service.SubmitPostService;
+import ml.docilealligator.infinityforreddit.Utils.SharedPreferencesUtils;
 import pl.droidsonroids.gif.GifImageView;
 import retrofit2.Retrofit;
 
@@ -183,6 +185,10 @@ public class PostVideoActivity extends BaseActivity implements FlairBottomSheetF
 
         applyCustomTheme();
 
+        if (mSharedPreferences.getBoolean(SharedPreferencesUtils.SWIPE_RIGHT_TO_GO_BACK_FROM_POST_DETAIL, true)) {
+            Slidr.attach(this);
+        }
+
         if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M && isChangeStatusBarIconColor()) {
             addOnOffsetChangedListener(appBarLayout);
         }

app/src/main/java/ml/docilealligator/infinityforreddit/Activity/ReportActivity.java

@@ -15,6 +15,7 @@ import androidx.recyclerview.widget.RecyclerView;
 
 import com.google.android.material.appbar.AppBarLayout;
 import com.google.android.material.snackbar.Snackbar;
+import com.r0adkll.slidr.Slidr;
 
 import java.util.ArrayList;
 
@@ -33,6 +34,7 @@ import ml.docilealligator.infinityforreddit.RedditDataRoomDatabase;
 import ml.docilealligator.infinityforreddit.ReportReason;
 import ml.docilealligator.infinityforreddit.ReportThing;
 import ml.docilealligator.infinityforreddit.Rule;
+import ml.docilealligator.infinityforreddit.Utils.SharedPreferencesUtils;
 import retrofit2.Retrofit;
 
 public class ReportActivity extends BaseActivity {
@@ -86,6 +88,10 @@ public class ReportActivity extends BaseActivity {
 
         applyCustomTheme();
 
+        if (mSharedPreferences.getBoolean(SharedPreferencesUtils.SWIPE_RIGHT_TO_GO_BACK_FROM_POST_DETAIL, true)) {
+            Slidr.attach(this);
+        }
+
         if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M && isChangeStatusBarIconColor()) {
             addOnOffsetChangedListener(appBarLayout);
         }

app/src/main/java/ml/docilealligator/infinityforreddit/Activity/RulesActivity.java

@@ -18,6 +18,7 @@ import androidx.recyclerview.widget.LinearLayoutManager;
 import androidx.recyclerview.widget.RecyclerView;
 
 import com.google.android.material.appbar.AppBarLayout;
+import com.r0adkll.slidr.Slidr;
 
 import org.greenrobot.eventbus.EventBus;
 import org.greenrobot.eventbus.Subscribe;
@@ -36,6 +37,7 @@ import ml.docilealligator.infinityforreddit.FetchRules;
 import ml.docilealligator.infinityforreddit.Infinity;
 import ml.docilealligator.infinityforreddit.R;
 import ml.docilealligator.infinityforreddit.Rule;
+import ml.docilealligator.infinityforreddit.Utils.SharedPreferencesUtils;
 import retrofit2.Retrofit;
 
 public class RulesActivity extends BaseActivity {
@@ -79,6 +81,10 @@ public class RulesActivity extends BaseActivity {
 
         applyCustomTheme();
 
+        if (mSharedPreferences.getBoolean(SharedPreferencesUtils.SWIPE_RIGHT_TO_GO_BACK_FROM_POST_DETAIL, true)) {
+            Slidr.attach(this);
+        }
+
         if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
             Window window = getWindow();
 

app/src/main/java/ml/docilealligator/infinityforreddit/Activity/SearchActivity.java

@@ -20,6 +20,7 @@ import androidx.coordinatorlayout.widget.CoordinatorLayout;
 
 import com.ferfalk.simplesearchview.SimpleSearchView;
 import com.google.android.material.appbar.AppBarLayout;
+import com.r0adkll.slidr.Slidr;
 
 import org.greenrobot.eventbus.EventBus;
 import org.greenrobot.eventbus.Subscribe;
@@ -33,6 +34,7 @@ import ml.docilealligator.infinityforreddit.CustomTheme.CustomThemeWrapper;
 import ml.docilealligator.infinityforreddit.Event.SwitchAccountEvent;
 import ml.docilealligator.infinityforreddit.Infinity;
 import ml.docilealligator.infinityforreddit.R;
+import ml.docilealligator.infinityforreddit.Utils.SharedPreferencesUtils;
 
 public class SearchActivity extends BaseActivity {
 
@@ -86,6 +88,10 @@ public class SearchActivity extends BaseActivity {
 
         applyCustomTheme();
 
+        if (mSharedPreferences.getBoolean(SharedPreferencesUtils.SWIPE_RIGHT_TO_GO_BACK_FROM_POST_DETAIL, true)) {
+            Slidr.attach(this);
+        }
+
         setSupportActionBar(toolbar);
 
         boolean searchOnlySubreddits = getIntent().getBooleanExtra(EXTRA_SEARCH_ONLY_SUBREDDITS, false);

app/src/main/java/ml/docilealligator/infinityforreddit/Activity/SearchResultActivity.java

@@ -21,6 +21,8 @@ import androidx.viewpager.widget.ViewPager;
 
 import com.google.android.material.appbar.AppBarLayout;
 import com.google.android.material.tabs.TabLayout;
+import com.r0adkll.slidr.Slidr;
+import com.r0adkll.slidr.model.SlidrInterface;
 
 import org.greenrobot.eventbus.EventBus;
 import org.greenrobot.eventbus.Subscribe;
@@ -93,6 +95,7 @@ public class SearchResultActivity extends BaseActivity implements SortTypeSelect
     private SortTimeBottomSheetFragment sortTimeBottomSheetFragment;
     private SearchUserAndSubredditSortTypeBottomSheetFragment searchUserAndSubredditSortTypeBottomSheetFragment;
     private PostLayoutBottomSheetFragment postLayoutBottomSheetFragment;
+    private SlidrInterface mSlidrInterface;
 
     @Override
     protected void onCreate(Bundle savedInstanceState) {
@@ -108,6 +111,10 @@ public class SearchResultActivity extends BaseActivity implements SortTypeSelect
 
         applyCustomTheme();
 
+        if (mSharedPreferences.getBoolean(SharedPreferencesUtils.SWIPE_RIGHT_TO_GO_BACK_FROM_POST_DETAIL, true)) {
+            mSlidrInterface = Slidr.attach(this);
+        }
+
         if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
             Window window = getWindow();
 
@@ -201,18 +208,15 @@ public class SearchResultActivity extends BaseActivity implements SortTypeSelect
         sectionsPagerAdapter = new SectionsPagerAdapter(getSupportFragmentManager());
         viewPager.setAdapter(sectionsPagerAdapter);
         viewPager.setOffscreenPageLimit(2);
-        viewPager.addOnPageChangeListener(new ViewPager.OnPageChangeListener() {
+        viewPager.addOnPageChangeListener(new ViewPager.SimpleOnPageChangeListener() {
-            @Override
-            public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
-            }
-
             @Override
             public void onPageSelected(int position) {
                 sectionsPagerAdapter.displaySortTypeInToolbar();
+                if (position == 0) {
+                    unlockSwipeRightToGoBack();
+                } else {
+                    lockSwipeRightToGoBack();
                 }
-
-            @Override
-            public void onPageScrollStateChanged(int state) {
             }
         });
         tabLayout.setupWithViewPager(viewPager);
@@ -497,4 +501,16 @@ public class SearchResultActivity extends BaseActivity implements SortTypeSelect
             }
         }
     }
+
+    private void lockSwipeRightToGoBack() {
+        if (mSlidrInterface != null) {
+            mSlidrInterface.lock();
+        }
+    }
+
+    private void unlockSwipeRightToGoBack() {
+        if (mSlidrInterface != null) {
+            mSlidrInterface.unlock();
+        }
+    }
 }

app/src/main/java/ml/docilealligator/infinityforreddit/Activity/SearchSubredditsResultActivity.java

@@ -15,6 +15,7 @@ import androidx.coordinatorlayout.widget.CoordinatorLayout;
 import androidx.fragment.app.Fragment;
 
 import com.google.android.material.appbar.AppBarLayout;
+import com.r0adkll.slidr.Slidr;
 
 import org.greenrobot.eventbus.EventBus;
 import org.greenrobot.eventbus.Subscribe;
@@ -32,6 +33,7 @@ import ml.docilealligator.infinityforreddit.Fragment.SubredditListingFragment;
 import ml.docilealligator.infinityforreddit.Infinity;
 import ml.docilealligator.infinityforreddit.R;
 import ml.docilealligator.infinityforreddit.RedditDataRoomDatabase;
+import ml.docilealligator.infinityforreddit.Utils.SharedPreferencesUtils;
 
 public class SearchSubredditsResultActivity extends BaseActivity implements ActivityToolbarInterface {
 
@@ -76,6 +78,10 @@ public class SearchSubredditsResultActivity extends BaseActivity implements Acti
 
         applyCustomTheme();
 
+        if (mSharedPreferences.getBoolean(SharedPreferencesUtils.SWIPE_RIGHT_TO_GO_BACK_FROM_POST_DETAIL, true)) {
+            Slidr.attach(this);
+        }
+
         if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
             Window window = getWindow();
 

app/src/main/java/ml/docilealligator/infinityforreddit/Activity/SelectedSubredditsActivity.java

@@ -16,6 +16,7 @@ import androidx.recyclerview.widget.RecyclerView;
 
 import com.google.android.material.appbar.AppBarLayout;
 import com.google.android.material.floatingactionbutton.FloatingActionButton;
+import com.r0adkll.slidr.Slidr;
 
 import java.util.ArrayList;
 
@@ -29,6 +30,7 @@ import ml.docilealligator.infinityforreddit.Adapter.SelectedSubredditsRecyclerVi
 import ml.docilealligator.infinityforreddit.CustomTheme.CustomThemeWrapper;
 import ml.docilealligator.infinityforreddit.Infinity;
 import ml.docilealligator.infinityforreddit.R;
+import ml.docilealligator.infinityforreddit.Utils.SharedPreferencesUtils;
 
 public class SelectedSubredditsActivity extends BaseActivity implements ActivityToolbarInterface {
 
@@ -63,8 +65,13 @@ public class SelectedSubredditsActivity extends BaseActivity implements Activity
         setContentView(R.layout.activity_selected_subreddits);
 
         ButterKnife.bind(this);
+
         applyCustomTheme();
 
+        if (mSharedPreferences.getBoolean(SharedPreferencesUtils.SWIPE_RIGHT_TO_GO_BACK_FROM_POST_DETAIL, true)) {
+            Slidr.attach(this);
+        }
+
         setSupportActionBar(toolbar);
         getSupportActionBar().setDisplayHomeAsUpEnabled(true);
         setToolbarGoToTop(toolbar);

app/src/main/java/ml/docilealligator/infinityforreddit/Activity/SubredditMultiselectionActivity.java

@@ -26,6 +26,7 @@ import androidx.swiperefreshlayout.widget.SwipeRefreshLayout;
 import com.bumptech.glide.Glide;
 import com.bumptech.glide.RequestManager;
 import com.google.android.material.appbar.AppBarLayout;
+import com.r0adkll.slidr.Slidr;
 
 import java.util.ArrayList;
 
@@ -42,6 +43,7 @@ import ml.docilealligator.infinityforreddit.Infinity;
 import ml.docilealligator.infinityforreddit.R;
 import ml.docilealligator.infinityforreddit.RedditDataRoomDatabase;
 import ml.docilealligator.infinityforreddit.SubscribedSubredditDatabase.SubscribedSubredditViewModel;
+import ml.docilealligator.infinityforreddit.Utils.SharedPreferencesUtils;
 import retrofit2.Retrofit;
 
 public class SubredditMultiselectionActivity extends BaseActivity implements ActivityToolbarInterface {
@@ -86,6 +88,7 @@ public class SubredditMultiselectionActivity extends BaseActivity implements Act
     private LinearLayoutManager mLinearLayoutManager;
     private SubredditMultiselectionRecyclerViewAdapter mAdapter;
     private RequestManager mGlide;
+
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         ((Infinity) getApplication()).getAppComponent().inject(this);
@@ -96,6 +99,10 @@ public class SubredditMultiselectionActivity extends BaseActivity implements Act
 
         applyCustomTheme();
 
+        if (mSharedPreferences.getBoolean(SharedPreferencesUtils.SWIPE_RIGHT_TO_GO_BACK_FROM_POST_DETAIL, true)) {
+            Slidr.attach(this);
+        }
+
         if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
             Window window = getWindow();
 

app/src/main/java/ml/docilealligator/infinityforreddit/Activity/SubredditSelectionActivity.java

@@ -17,6 +17,7 @@ import androidx.coordinatorlayout.widget.CoordinatorLayout;
 import androidx.fragment.app.Fragment;
 
 import com.google.android.material.appbar.AppBarLayout;
+import com.r0adkll.slidr.Slidr;
 
 import org.greenrobot.eventbus.EventBus;
 import org.greenrobot.eventbus.Subscribe;
@@ -41,6 +42,7 @@ import ml.docilealligator.infinityforreddit.RedditDataRoomDatabase;
 import ml.docilealligator.infinityforreddit.SubredditDatabase.SubredditData;
 import ml.docilealligator.infinityforreddit.SubscribedSubredditDatabase.SubscribedSubredditData;
 import ml.docilealligator.infinityforreddit.SubscribedUserDatabase.SubscribedUserData;
+import ml.docilealligator.infinityforreddit.Utils.SharedPreferencesUtils;
 import retrofit2.Retrofit;
 
 public class SubredditSelectionActivity extends BaseActivity implements ActivityToolbarInterface {
@@ -95,6 +97,10 @@ public class SubredditSelectionActivity extends BaseActivity implements Activity
 
         applyCustomTheme();
 
+        if (mSharedPreferences.getBoolean(SharedPreferencesUtils.SWIPE_RIGHT_TO_GO_BACK_FROM_POST_DETAIL, true)) {
+            Slidr.attach(this);
+        }
+
         if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
             Window window = getWindow();
 

app/src/main/java/ml/docilealligator/infinityforreddit/Activity/SubscribedThingListingActivity.java

@@ -20,6 +20,7 @@ import androidx.viewpager.widget.ViewPager;
 import com.google.android.material.appbar.AppBarLayout;
 import com.google.android.material.dialog.MaterialAlertDialogBuilder;
 import com.google.android.material.tabs.TabLayout;
+import com.r0adkll.slidr.Slidr;
 
 import org.greenrobot.eventbus.EventBus;
 import org.greenrobot.eventbus.Subscribe;
@@ -53,6 +54,7 @@ import ml.docilealligator.infinityforreddit.RedditDataRoomDatabase;
 import ml.docilealligator.infinityforreddit.SubredditDatabase.SubredditData;
 import ml.docilealligator.infinityforreddit.SubscribedSubredditDatabase.SubscribedSubredditData;
 import ml.docilealligator.infinityforreddit.SubscribedUserDatabase.SubscribedUserData;
+import ml.docilealligator.infinityforreddit.Utils.SharedPreferencesUtils;
 import retrofit2.Retrofit;
 
 public class SubscribedThingListingActivity extends BaseActivity implements ActivityToolbarInterface {
@@ -106,6 +108,10 @@ public class SubscribedThingListingActivity extends BaseActivity implements Acti
 
         applyCustomTheme();
 
+        if (mSharedPreferences.getBoolean(SharedPreferencesUtils.SWIPE_RIGHT_TO_GO_BACK_FROM_POST_DETAIL, true)) {
+            Slidr.attach(this);
+        }
+
         if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
             Window window = getWindow();
 

app/src/main/java/ml/docilealligator/infinityforreddit/Activity/ThemePreviewActivity.java

@@ -32,6 +32,7 @@ import com.google.android.material.bottomappbar.BottomAppBar;
 import com.google.android.material.chip.Chip;
 import com.google.android.material.floatingactionbutton.FloatingActionButton;
 import com.google.android.material.tabs.TabLayout;
+import com.r0adkll.slidr.Slidr;
 
 import java.util.ArrayList;
 
@@ -41,15 +42,15 @@ import javax.inject.Named;
 import butterknife.BindView;
 import butterknife.ButterKnife;
 import ml.docilealligator.infinityforreddit.AppBarStateChangeListener;
-import ml.docilealligator.infinityforreddit.Font.ContentFontStyle;
 import ml.docilealligator.infinityforreddit.CustomTheme.CustomTheme;
 import ml.docilealligator.infinityforreddit.CustomTheme.CustomThemeSettingsItem;
+import ml.docilealligator.infinityforreddit.Font.ContentFontStyle;
 import ml.docilealligator.infinityforreddit.Font.FontStyle;
+import ml.docilealligator.infinityforreddit.Font.TitleFontStyle;
 import ml.docilealligator.infinityforreddit.Fragment.ThemePreviewCommentsFragment;
 import ml.docilealligator.infinityforreddit.Fragment.ThemePreviewPostsFragment;
 import ml.docilealligator.infinityforreddit.Infinity;
 import ml.docilealligator.infinityforreddit.R;
-import ml.docilealligator.infinityforreddit.Font.TitleFontStyle;
 import ml.docilealligator.infinityforreddit.Utils.SharedPreferencesUtils;
 
 import static androidx.appcompat.app.AppCompatDelegate.MODE_NIGHT_AUTO_BATTERY;
@@ -133,7 +134,7 @@ public class ThemePreviewActivity extends AppCompatActivity {
                 break;
             case 1:
                 AppCompatDelegate.setDefaultNightMode(MODE_NIGHT_YES);
-                if(mSharedPreferences.getBoolean(SharedPreferencesUtils.AMOLED_DARK_KEY, false)) {
+                if (mSharedPreferences.getBoolean(SharedPreferencesUtils.AMOLED_DARK_KEY, false)) {
                     getTheme().applyStyle(R.style.Theme_Normal_AmoledDark, true);
                 } else {
                     getTheme().applyStyle(R.style.Theme_Normal_NormalDark, true);
@@ -145,10 +146,10 @@ public class ThemePreviewActivity extends AppCompatActivity {
                 } else {
                     AppCompatDelegate.setDefaultNightMode(MODE_NIGHT_AUTO_BATTERY);
                 }
-                if((getResources().getConfiguration().uiMode & Configuration.UI_MODE_NIGHT_MASK) == Configuration.UI_MODE_NIGHT_NO) {
+                if ((getResources().getConfiguration().uiMode & Configuration.UI_MODE_NIGHT_MASK) == Configuration.UI_MODE_NIGHT_NO) {
                     getTheme().applyStyle(R.style.Theme_Normal, true);
                 } else {
-                    if(mSharedPreferences.getBoolean(SharedPreferencesUtils.AMOLED_DARK_KEY, false)) {
+                    if (mSharedPreferences.getBoolean(SharedPreferencesUtils.AMOLED_DARK_KEY, false)) {
                         getTheme().applyStyle(R.style.Theme_Normal_AmoledDark, true);
                     } else {
                         getTheme().applyStyle(R.style.Theme_Normal_NormalDark, true);
@@ -215,8 +216,13 @@ public class ThemePreviewActivity extends AppCompatActivity {
         setContentView(R.layout.activity_theme_preview);
 
         ButterKnife.bind(this);
+
         applyCustomTheme();
 
+        if (mSharedPreferences.getBoolean(SharedPreferencesUtils.SWIPE_RIGHT_TO_GO_BACK_FROM_POST_DETAIL, true)) {
+            Slidr.attach(this);
+        }
+
         if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
             if (immersiveInterface) {
                 window.setFlags(WindowManager.LayoutParams.FLAG_LAYOUT_NO_LIMITS, WindowManager.LayoutParams.FLAG_LAYOUT_NO_LIMITS);
@@ -354,10 +360,9 @@ public class ThemePreviewActivity extends AppCompatActivity {
             params.topMargin = statusBarHeight;
             toolbar.setLayoutParams(params);
             TypedValue tv = new TypedValue();
-            if (getTheme().resolveAttribute(android.R.attr.actionBarSize, tv, true))
+            if (getTheme().resolveAttribute(android.R.attr.actionBarSize, tv, true)) {
-            {
+                ((ViewGroup.MarginLayoutParams) linearLayout.getLayoutParams()).setMargins(0,
-                ((ViewGroup.MarginLayoutParams)linearLayout.getLayoutParams()).setMargins(0,
+                        TypedValue.complexToDimensionPixelSize(tv.data, getResources().getDisplayMetrics()) + statusBarHeight, 0, 0);
-                        TypedValue.complexToDimensionPixelSize(tv.data,getResources().getDisplayMetrics()) + statusBarHeight, 0, 0);
             }
         }
     }

app/src/main/java/ml/docilealligator/infinityforreddit/Activity/ViewImgurMediaActivity.java

@@ -259,21 +259,11 @@ public class ViewImgurMediaActivity extends AppCompatActivity implements SetAsWa
     private void setupViewPager() {
         setToolbarTitle(0);
         sectionsPagerAdapter = new SectionsPagerAdapter(getSupportFragmentManager());
-        viewPager.addOnPageChangeListener(new ViewPager.OnPageChangeListener() {
+        viewPager.addOnPageChangeListener(new ViewPager.SimpleOnPageChangeListener() {
-            @Override
-            public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
-
-            }
-
             @Override
             public void onPageSelected(int position) {
                 setToolbarTitle(position);
             }
-
-            @Override
-            public void onPageScrollStateChanged(int state) {
-
-            }
         });
         viewPager.setAdapter(sectionsPagerAdapter);
     }

app/src/main/java/ml/docilealligator/infinityforreddit/Activity/ViewMessageActivity.java

@@ -26,6 +26,7 @@ import com.bumptech.glide.Glide;
 import com.bumptech.glide.RequestManager;
 import com.google.android.material.appbar.AppBarLayout;
 import com.google.android.material.appbar.CollapsingToolbarLayout;
+import com.r0adkll.slidr.Slidr;
 
 import org.greenrobot.eventbus.EventBus;
 import org.greenrobot.eventbus.Subscribe;
@@ -47,6 +48,7 @@ import ml.docilealligator.infinityforreddit.MessageViewModel;
 import ml.docilealligator.infinityforreddit.NetworkState;
 import ml.docilealligator.infinityforreddit.R;
 import ml.docilealligator.infinityforreddit.RedditDataRoomDatabase;
+import ml.docilealligator.infinityforreddit.Utils.SharedPreferencesUtils;
 import retrofit2.Retrofit;
 
 public class ViewMessageActivity extends BaseActivity implements ActivityToolbarInterface {
@@ -107,6 +109,10 @@ public class ViewMessageActivity extends BaseActivity implements ActivityToolbar
 
         applyCustomTheme();
 
+        if (mSharedPreferences.getBoolean(SharedPreferencesUtils.SWIPE_RIGHT_TO_GO_BACK_FROM_POST_DETAIL, true)) {
+            Slidr.attach(this);
+        }
+
         mGlide = Glide.with(this);
 
         if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {

app/src/main/java/ml/docilealligator/infinityforreddit/Activity/ViewMultiRedditDetailActivity.java

@@ -18,6 +18,7 @@ import androidx.fragment.app.Fragment;
 import com.google.android.material.appbar.AppBarLayout;
 import com.google.android.material.appbar.CollapsingToolbarLayout;
 import com.google.android.material.dialog.MaterialAlertDialogBuilder;
+import com.r0adkll.slidr.Slidr;
 
 import org.greenrobot.eventbus.EventBus;
 
@@ -28,12 +29,12 @@ import butterknife.BindView;
 import butterknife.ButterKnife;
 import ml.docilealligator.infinityforreddit.ActivityToolbarInterface;
 import ml.docilealligator.infinityforreddit.AsyncTask.GetCurrentAccountAsyncTask;
-import ml.docilealligator.infinityforreddit.CustomTheme.CustomThemeWrapper;
-import ml.docilealligator.infinityforreddit.Event.RefreshMultiRedditsEvent;
-import ml.docilealligator.infinityforreddit.Fragment.PostFragment;
 import ml.docilealligator.infinityforreddit.BottomSheetFragment.PostLayoutBottomSheetFragment;
 import ml.docilealligator.infinityforreddit.BottomSheetFragment.SortTimeBottomSheetFragment;
 import ml.docilealligator.infinityforreddit.BottomSheetFragment.SortTypeBottomSheetFragment;
+import ml.docilealligator.infinityforreddit.CustomTheme.CustomThemeWrapper;
+import ml.docilealligator.infinityforreddit.Event.RefreshMultiRedditsEvent;
+import ml.docilealligator.infinityforreddit.Fragment.PostFragment;
 import ml.docilealligator.infinityforreddit.FragmentCommunicator;
 import ml.docilealligator.infinityforreddit.Infinity;
 import ml.docilealligator.infinityforreddit.MultiReddit.DeleteMultiReddit;
@@ -108,6 +109,10 @@ public class ViewMultiRedditDetailActivity extends BaseActivity implements SortT
 
         applyCustomTheme();
 
+        if (mSharedPreferences.getBoolean(SharedPreferencesUtils.SWIPE_RIGHT_TO_GO_BACK_FROM_POST_DETAIL, true)) {
+            Slidr.attach(this);
+        }
+
         if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
             Window window = getWindow();
 
@@ -301,8 +306,8 @@ public class ViewMultiRedditDetailActivity extends BaseActivity implements SortT
     public void sortTypeSelected(SortType sortType) {
         mSortTypeSharedPreferences.edit().putString(SharedPreferencesUtils.SORT_TYPE_MULTI_REDDIT_POST_BASE + multiPath,
                 sortType.getType().name()).apply();
-        if(sortType.getTime() != null) {
+        if (sortType.getTime() != null) {
-            mSortTypeSharedPreferences.edit().putString(SharedPreferencesUtils.SORT_TIME_MULTI_REDDIT_POST_BASE+ multiPath,
+            mSortTypeSharedPreferences.edit().putString(SharedPreferencesUtils.SORT_TIME_MULTI_REDDIT_POST_BASE + multiPath,
                     sortType.getTime().name()).apply();
         }
 

app/src/main/java/ml/docilealligator/infinityforreddit/Activity/ViewSubredditDetailActivity.java

@@ -37,6 +37,8 @@ import com.google.android.material.chip.Chip;
 import com.google.android.material.floatingactionbutton.FloatingActionButton;
 import com.google.android.material.snackbar.Snackbar;
 import com.google.android.material.tabs.TabLayout;
+import com.r0adkll.slidr.Slidr;
+import com.r0adkll.slidr.model.SlidrInterface;
 
 import org.greenrobot.eventbus.EventBus;
 import org.greenrobot.eventbus.Subscribe;
@@ -56,17 +58,17 @@ import ml.docilealligator.infinityforreddit.AsyncTask.CheckIsSubscribedToSubredd
 import ml.docilealligator.infinityforreddit.AsyncTask.GetCurrentAccountAsyncTask;
 import ml.docilealligator.infinityforreddit.AsyncTask.InsertSubredditDataAsyncTask;
 import ml.docilealligator.infinityforreddit.AsyncTask.SwitchAccountAsyncTask;
+import ml.docilealligator.infinityforreddit.BottomSheetFragment.PostLayoutBottomSheetFragment;
+import ml.docilealligator.infinityforreddit.BottomSheetFragment.PostTypeBottomSheetFragment;
+import ml.docilealligator.infinityforreddit.BottomSheetFragment.SortTimeBottomSheetFragment;
+import ml.docilealligator.infinityforreddit.BottomSheetFragment.SortTypeBottomSheetFragment;
 import ml.docilealligator.infinityforreddit.CustomTheme.CustomThemeWrapper;
 import ml.docilealligator.infinityforreddit.Event.ChangeNSFWEvent;
 import ml.docilealligator.infinityforreddit.Event.GoBackToMainPageEvent;
 import ml.docilealligator.infinityforreddit.Event.SwitchAccountEvent;
 import ml.docilealligator.infinityforreddit.FetchSubredditData;
 import ml.docilealligator.infinityforreddit.Fragment.PostFragment;
-import ml.docilealligator.infinityforreddit.BottomSheetFragment.PostLayoutBottomSheetFragment;
-import ml.docilealligator.infinityforreddit.BottomSheetFragment.PostTypeBottomSheetFragment;
 import ml.docilealligator.infinityforreddit.Fragment.SidebarFragment;
-import ml.docilealligator.infinityforreddit.BottomSheetFragment.SortTimeBottomSheetFragment;
-import ml.docilealligator.infinityforreddit.BottomSheetFragment.SortTypeBottomSheetFragment;
 import ml.docilealligator.infinityforreddit.FragmentCommunicator;
 import ml.docilealligator.infinityforreddit.Infinity;
 import ml.docilealligator.infinityforreddit.Post.PostDataSource;
@@ -196,6 +198,7 @@ public class ViewSubredditDetailActivity extends BaseActivity implements SortTyp
     private int collapsedTabIndicatorColor;
     private int unsubscribedColor;
     private int subscribedColor;
+    private SlidrInterface mSlidrInterface;
 
     @Override
     protected void onCreate(Bundle savedInstanceState) {
@@ -212,6 +215,10 @@ public class ViewSubredditDetailActivity extends BaseActivity implements SortTyp
 
         applyCustomTheme();
 
+        if (mSharedPreferences.getBoolean(SharedPreferencesUtils.SWIPE_RIGHT_TO_GO_BACK_FROM_POST_DETAIL, true)) {
+            mSlidrInterface = Slidr.attach(this);
+        }
+
         if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
             Window window = getWindow();
             if (isImmersiveInterface()) {
@@ -624,6 +631,16 @@ public class ViewSubredditDetailActivity extends BaseActivity implements SortTyp
                 }).execute();
 
         sectionsPagerAdapter = new SectionsPagerAdapter(getSupportFragmentManager());
+        viewPager.addOnPageChangeListener(new ViewPager.SimpleOnPageChangeListener() {
+            @Override
+            public void onPageSelected(int position) {
+                if (position == 0) {
+                    unlockSwipeRightToGoBack();
+                } else {
+                    lockSwipeRightToGoBack();
+                }
+            }
+        });
         viewPager.setAdapter(sectionsPagerAdapter);
         viewPager.setOffscreenPageLimit(2);
         tabLayout.setupWithViewPager(viewPager);
@@ -634,12 +651,7 @@ public class ViewSubredditDetailActivity extends BaseActivity implements SortTyp
             viewPager.setCurrentItem(1, false);
         }
 
-        viewPager.addOnPageChangeListener(new ViewPager.OnPageChangeListener() {
+        viewPager.addOnPageChangeListener(new ViewPager.SimpleOnPageChangeListener() {
-            @Override
-            public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
-
-            }
-
             @Override
             public void onPageSelected(int position) {
                 if (mAccessToken != null) {
@@ -658,11 +670,6 @@ public class ViewSubredditDetailActivity extends BaseActivity implements SortTyp
 
                 sectionsPagerAdapter.displaySortTypeInToolbar();
             }
-
-            @Override
-            public void onPageScrollStateChanged(int state) {
-
-            }
         });
     }
 
@@ -982,7 +989,7 @@ public class ViewSubredditDetailActivity extends BaseActivity implements SortTyp
         public void changeSortType(SortType sortType) {
             if (postFragment != null) {
                 mSortTypeSharedPreferences.edit().putString(SharedPreferencesUtils.SORT_TYPE_SUBREDDIT_POST_BASE + subredditName, sortType.getType().name()).apply();
-                if(sortType.getTime() != null) {
+                if (sortType.getTime() != null) {
                     mSortTypeSharedPreferences.edit().putString(SharedPreferencesUtils.SORT_TIME_SUBREDDIT_POST_BASE + subredditName, sortType.getTime().name()).apply();
                 }
 
@@ -1025,4 +1032,16 @@ public class ViewSubredditDetailActivity extends BaseActivity implements SortTyp
             }
         }
     }
+
+    private void lockSwipeRightToGoBack() {
+        if (mSlidrInterface != null) {
+            mSlidrInterface.lock();
+        }
+    }
+
+    private void unlockSwipeRightToGoBack() {
+        if (mSlidrInterface != null) {
+            mSlidrInterface.unlock();
+        }
+    }
 }

app/src/main/java/ml/docilealligator/infinityforreddit/Activity/ViewUserDetailActivity.java

@@ -36,6 +36,8 @@ import com.google.android.material.chip.Chip;
 import com.google.android.material.dialog.MaterialAlertDialogBuilder;
 import com.google.android.material.snackbar.Snackbar;
 import com.google.android.material.tabs.TabLayout;
+import com.r0adkll.slidr.Slidr;
+import com.r0adkll.slidr.model.SlidrInterface;
 
 import org.greenrobot.eventbus.EventBus;
 import org.greenrobot.eventbus.Subscribe;
@@ -171,6 +173,7 @@ public class ViewUserDetailActivity extends BaseActivity implements SortTypeSele
     private boolean showToast = false;
     private String mMessageFullname;
     private String mNewAccountName;
+    private SlidrInterface mSlidrInterface;
 
     @Override
     protected void onCreate(Bundle savedInstanceState) {
@@ -187,6 +190,10 @@ public class ViewUserDetailActivity extends BaseActivity implements SortTypeSele
 
         applyCustomTheme();
 
+        if (mSharedPreferences.getBoolean(SharedPreferencesUtils.SWIPE_RIGHT_TO_GO_BACK_FROM_POST_DETAIL, true)) {
+            mSlidrInterface = Slidr.attach(this);
+        }
+
         username = getIntent().getStringExtra(EXTRA_USER_NAME_KEY);
 
         if (savedInstanceState == null) {
@@ -496,12 +503,7 @@ public class ViewUserDetailActivity extends BaseActivity implements SortTypeSele
         viewPager.setOffscreenPageLimit(2);
         tabLayout.setupWithViewPager(viewPager);
 
-        viewPager.addOnPageChangeListener(new ViewPager.OnPageChangeListener() {
+        viewPager.addOnPageChangeListener(new ViewPager.SimpleOnPageChangeListener() {
-            @Override
-            public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
-
-            }
-
             @Override
             public void onPageSelected(int position) {
                 if (isInLazyMode) {
@@ -511,12 +513,12 @@ public class ViewUserDetailActivity extends BaseActivity implements SortTypeSele
                         sectionsPagerAdapter.pauseLazyMode();
                     }
                 }
-                sectionsPagerAdapter.displaySortTypeInToolbar();
+                if (position == 0) {
+                    unlockSwipeRightToGoBack();
+                } else {
+                    lockSwipeRightToGoBack();
                 }
-
+                sectionsPagerAdapter.displaySortTypeInToolbar();
-            @Override
-            public void onPageScrollStateChanged(int state) {
-
             }
         });
 
@@ -926,4 +928,16 @@ public class ViewUserDetailActivity extends BaseActivity implements SortTypeSele
             }
         }
     }
+
+    private void lockSwipeRightToGoBack() {
+        if (mSlidrInterface != null) {
+            mSlidrInterface.lock();
+        }
+    }
+
+    private void unlockSwipeRightToGoBack() {
+        if (mSlidrInterface != null) {
+            mSlidrInterface.unlock();
+        }
+    }
 }

app/src/main/res/values/styles.xml

@@ -27,11 +27,19 @@
         <item name="android:windowTranslucentStatus">true</item>
     </style>
 
-    <style name="AppTheme.NoActionBarWithTransparentBackground" parent="AppTheme.NoActionBar">
+    <style name="AppTheme.Slidable" parent="AppTheme.NoActionBar">
         <item name="android:windowIsTranslucent">true</item>
         <item name="android:windowBackground">@android:color/transparent</item>
     </style>
 
+    <style name="AppTheme.SlidableWithTranslucentWindow" parent="AppTheme.Slidable">
+        <item name="android:windowTranslucentStatus">true</item>
+    </style>
+
+    <style name="AppTheme.SlidableWithTransparentStatusBar" parent="AppTheme.Slidable">
+        <item name="android:statusBarColor">@android:color/transparent</item>
+    </style>
+
     <style name="AppTheme.Draggable" parent="AppTheme">
         <item name="android:colorBackgroundCacheHint">@null</item>
         <item name="android:windowContentOverlay">@null</item>