Bottom app bar is available in ViewMultiRedditDetailActivity.

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

@@ -3,11 +3,14 @@ package ml.docilealligator.infinityforreddit.activities;
 import android.content.Context;
 import android.content.Intent;
 import android.content.SharedPreferences;
+import android.content.res.ColorStateList;
+import android.graphics.PorterDuff;
 import android.os.Build;
 import android.os.Bundle;
 import android.os.Handler;
 import android.text.Editable;
 import android.text.TextWatcher;
+import android.view.Gravity;
 import android.view.Menu;
 import android.view.MenuItem;
 import android.view.View;
@@ -15,6 +18,8 @@ import android.view.Window;
 import android.view.WindowManager;
 import android.view.inputmethod.EditorInfo;
 import android.view.inputmethod.InputMethodManager;
+import android.widget.ImageView;
+import android.widget.LinearLayout;
 import android.widget.Toast;
 
 import androidx.annotation.NonNull;
@@ -25,12 +30,14 @@ import androidx.recyclerview.widget.RecyclerView;
 
 import com.google.android.material.appbar.AppBarLayout;
 import com.google.android.material.appbar.CollapsingToolbarLayout;
+import com.google.android.material.bottomappbar.BottomAppBar;
 import com.google.android.material.dialog.MaterialAlertDialogBuilder;
 import com.google.android.material.floatingactionbutton.FloatingActionButton;
 import com.google.android.material.textfield.TextInputEditText;
 import com.r0adkll.slidr.Slidr;
 
 import org.greenrobot.eventbus.EventBus;
+import org.greenrobot.eventbus.Subscribe;
 
 import java.util.ArrayList;
 import java.util.concurrent.Executor;
@@ -45,6 +52,7 @@ import ml.docilealligator.infinityforreddit.FragmentCommunicator;
 import ml.docilealligator.infinityforreddit.Infinity;
 import ml.docilealligator.infinityforreddit.MarkPostAsReadInterface;
 import ml.docilealligator.infinityforreddit.R;
+import ml.docilealligator.infinityforreddit.RecyclerViewContentScrollingInterface;
 import ml.docilealligator.infinityforreddit.RedditDataRoomDatabase;
 import ml.docilealligator.infinityforreddit.SortType;
 import ml.docilealligator.infinityforreddit.SortTypeSelectionCallback;
@@ -58,7 +66,9 @@ import ml.docilealligator.infinityforreddit.bottomsheetfragments.RandomBottomShe
 import ml.docilealligator.infinityforreddit.bottomsheetfragments.SortTimeBottomSheetFragment;
 import ml.docilealligator.infinityforreddit.bottomsheetfragments.SortTypeBottomSheetFragment;
 import ml.docilealligator.infinityforreddit.customtheme.CustomThemeWrapper;
+import ml.docilealligator.infinityforreddit.events.GoBackToMainPageEvent;
 import ml.docilealligator.infinityforreddit.events.RefreshMultiRedditsEvent;
+import ml.docilealligator.infinityforreddit.events.SwitchAccountEvent;
 import ml.docilealligator.infinityforreddit.fragments.PostFragment;
 import ml.docilealligator.infinityforreddit.multireddit.DeleteMultiReddit;
 import ml.docilealligator.infinityforreddit.multireddit.MultiReddit;
@@ -78,7 +88,7 @@ import retrofit2.Retrofit;
 public class ViewMultiRedditDetailActivity extends BaseActivity implements SortTypeSelectionCallback,
         PostLayoutBottomSheetFragment.PostLayoutSelectionCallback, ActivityToolbarInterface, MarkPostAsReadInterface,
         PostTypeBottomSheetFragment.PostTypeSelectionCallback, FABMoreOptionsBottomSheetFragment.FABOptionSelectionCallback,
-        RandomBottomSheetFragment.RandomOptionSelectionCallback {
+        RandomBottomSheetFragment.RandomOptionSelectionCallback, RecyclerViewContentScrollingInterface {
 
     public static final String EXTRA_MULTIREDDIT_DATA = "EMD";
     public static final String EXTRA_MULTIREDDIT_PATH = "EMP";
@@ -93,6 +103,18 @@ public class ViewMultiRedditDetailActivity extends BaseActivity implements SortT
     CollapsingToolbarLayout collapsingToolbarLayout;
     @BindView(R.id.toolbar_view_multi_reddit_detail_activity)
     Toolbar toolbar;
+    @BindView(R.id.bottom_app_bar_bottom_app_bar)
+    BottomAppBar bottomNavigationView;
+    @BindView(R.id.linear_layout_bottom_app_bar)
+    LinearLayout linearLayoutBottomAppBar;
+    @BindView(R.id.option_1_bottom_app_bar)
+    ImageView option1BottomAppBar;
+    @BindView(R.id.option_2_bottom_app_bar)
+    ImageView option2BottomAppBar;
+    @BindView(R.id.option_3_bottom_app_bar)
+    ImageView option3BottomAppBar;
+    @BindView(R.id.option_4_bottom_app_bar)
+    ImageView option4BottomAppBar;
     @BindView(R.id.fab_view_multi_reddit_detail_activity)
     FloatingActionButton fab;
     @Inject
@@ -122,6 +144,9 @@ public class ViewMultiRedditDetailActivity extends BaseActivity implements SortT
     @Named("nsfw_and_spoiler")
     SharedPreferences mNsfwAndSpoilerSharedPreferences;
     @Inject
+    @Named("bottom_app_bar")
+    SharedPreferences mBottomAppBarSharedPreference;
+    @Inject
     CustomThemeWrapper mCustomThemeWrapper;
     @Inject
     Executor mExecutor;
@@ -129,10 +154,9 @@ public class ViewMultiRedditDetailActivity extends BaseActivity implements SortT
     private String mAccountName;
     private String multiPath;
     private Fragment mFragment;
-    private SortTypeBottomSheetFragment sortTypeBottomSheetFragment;
-    private SortTimeBottomSheetFragment sortTimeBottomSheetFragment;
-    private PostLayoutBottomSheetFragment postLayoutBottomSheetFragment;
     private int fabOption;
+    private boolean showBottomAppBar;
+    private boolean lockBottomAppBar;
     private Call<String> subredditAutocompleteCall;
 
     @Override
@@ -143,6 +167,8 @@ public class ViewMultiRedditDetailActivity extends BaseActivity implements SortT
 
         ButterKnife.bind(this);
 
+        EventBus.getDefault().register(this);
+
         applyCustomTheme();
 
         if (mSharedPreferences.getBoolean(SharedPreferencesUtils.SWIPE_RIGHT_TO_GO_BACK, true)) {
@@ -171,6 +197,7 @@ public class ViewMultiRedditDetailActivity extends BaseActivity implements SortT
                     CoordinatorLayout.LayoutParams params = (CoordinatorLayout.LayoutParams) fab.getLayoutParams();
                     params.bottomMargin += navBarHeight;
                     fab.setLayoutParams(params);
+                    bottomNavigationView.setPadding(0, 0, 0, navBarHeight);
                 }
             }
         }
@@ -196,6 +223,8 @@ public class ViewMultiRedditDetailActivity extends BaseActivity implements SortT
 
         mAccessToken = mCurrentAccountSharedPreferences.getString(SharedPreferencesUtils.ACCESS_TOKEN, null);
         mAccountName = mCurrentAccountSharedPreferences.getString(SharedPreferencesUtils.ACCOUNT_NAME, "-");
+        showBottomAppBar = mSharedPreferences.getBoolean(SharedPreferencesUtils.BOTTOM_APP_BAR_KEY, false);
+        lockBottomAppBar = mSharedPreferences.getBoolean(SharedPreferencesUtils.LOCK_BOTTOM_APP_BAR, false);
 
         if (savedInstanceState != null) {
             mFragment = getSupportFragmentManager().getFragment(savedInstanceState, FRAGMENT_OUT_STATE_KEY);
@@ -204,14 +233,59 @@ public class ViewMultiRedditDetailActivity extends BaseActivity implements SortT
             initializeFragment();
         }
 
-        sortTypeBottomSheetFragment = new SortTypeBottomSheetFragment();
+        if (showBottomAppBar) {
-        Bundle bottomSheetBundle = new Bundle();
+            int optionCount = mBottomAppBarSharedPreference.getInt((mAccessToken == null ? "-" : "") + SharedPreferencesUtils.OTHER_ACTIVITIES_BOTTOM_APP_BAR_OPTION_COUNT, 4);
-        bottomSheetBundle.putBoolean(SortTypeBottomSheetFragment.EXTRA_NO_BEST_TYPE, true);
+            int option1 = mBottomAppBarSharedPreference.getInt((mAccessToken == null ? "-" : "") + SharedPreferencesUtils.OTHER_ACTIVITIES_BOTTOM_APP_BAR_OPTION_1, SharedPreferencesUtils.OTHER_ACTIVITIES_BOTTOM_APP_BAR_OPTION_HOME);
-        sortTypeBottomSheetFragment.setArguments(bottomSheetBundle);
+            int option2 = mBottomAppBarSharedPreference.getInt((mAccessToken == null ? "-" : "") + SharedPreferencesUtils.OTHER_ACTIVITIES_BOTTOM_APP_BAR_OPTION_2, SharedPreferencesUtils.OTHER_ACTIVITIES_BOTTOM_APP_BAR_OPTION_SUBSCRIPTIONS);
 
-        sortTimeBottomSheetFragment = new SortTimeBottomSheetFragment();
+            bottomNavigationView.setVisibility(View.VISIBLE);
 
-        postLayoutBottomSheetFragment = new PostLayoutBottomSheetFragment();
+            if (optionCount == 2) {
+                linearLayoutBottomAppBar.setWeightSum(3);
+                option1BottomAppBar.setVisibility(View.GONE);
+                option3BottomAppBar.setVisibility(View.GONE);
+
+                option2BottomAppBar.setImageResource(getBottomAppBarOptionDrawableResource(option1));
+                option4BottomAppBar.setImageResource(getBottomAppBarOptionDrawableResource(option2));
+
+                option2BottomAppBar.setOnClickListener(view -> {
+                    bottomAppBarOptionAction(option1);
+                });
+
+                option4BottomAppBar.setOnClickListener(view -> {
+                    bottomAppBarOptionAction(option2);
+                });
+            } else {
+                int option3 = mBottomAppBarSharedPreference.getInt((mAccessToken == null ? "-" : "") + SharedPreferencesUtils.OTHER_ACTIVITIES_BOTTOM_APP_BAR_OPTION_3, mAccessToken == null ? SharedPreferencesUtils.OTHER_ACTIVITIES_BOTTOM_APP_BAR_OPTION_MULTIREDDITS : SharedPreferencesUtils.OTHER_ACTIVITIES_BOTTOM_APP_BAR_OPTION_INBOX);
+                int option4 = mBottomAppBarSharedPreference.getInt((mAccessToken == null ? "-" : "") + SharedPreferencesUtils.OTHER_ACTIVITIES_BOTTOM_APP_BAR_OPTION_4, mAccessToken == null ? SharedPreferencesUtils.OTHER_ACTIVITIES_BOTTOM_APP_BAR_OPTION_REFRESH : SharedPreferencesUtils.OTHER_ACTIVITIES_BOTTOM_APP_BAR_OPTION_PROFILE);
+
+                option1BottomAppBar.setImageResource(getBottomAppBarOptionDrawableResource(option1));
+                option2BottomAppBar.setImageResource(getBottomAppBarOptionDrawableResource(option2));
+                option3BottomAppBar.setImageResource(getBottomAppBarOptionDrawableResource(option3));
+                option4BottomAppBar.setImageResource(getBottomAppBarOptionDrawableResource(option4));
+
+                option1BottomAppBar.setOnClickListener(view -> {
+                    bottomAppBarOptionAction(option1);
+                });
+
+                option2BottomAppBar.setOnClickListener(view -> {
+                    bottomAppBarOptionAction(option2);
+                });
+
+                option3BottomAppBar.setOnClickListener(view -> {
+                    bottomAppBarOptionAction(option3);
+                });
+
+                option4BottomAppBar.setOnClickListener(view -> {
+                    bottomAppBarOptionAction(option4);
+                });
+            }
+        } else {
+            CoordinatorLayout.LayoutParams lp = (CoordinatorLayout.LayoutParams) fab.getLayoutParams();
+            lp.setAnchorId(View.NO_ID);
+            lp.gravity = Gravity.END | Gravity.BOTTOM;
+            fab.setLayoutParams(lp);
+        }
 
         fabOption = bottomAppBarSharedPreference.getInt(SharedPreferencesUtils.OTHER_ACTIVITIES_BOTTOM_APP_BAR_FAB, SharedPreferencesUtils.OTHER_ACTIVITIES_BOTTOM_APP_BAR_FAB_SUBMIT_POSTS);
         switch (fabOption) {
@@ -265,12 +339,11 @@ public class ViewMultiRedditDetailActivity extends BaseActivity implements SortT
                     break;
                 }
                 case SharedPreferencesUtils.OTHER_ACTIVITIES_BOTTOM_APP_BAR_FAB_CHANGE_SORT_TYPE: {
-                    sortTypeBottomSheetFragment.show(getSupportFragmentManager(), sortTypeBottomSheetFragment.getTag());
+                    showSortTypeBottomSheetFragment();
                     break;
                 }
                 case SharedPreferencesUtils.OTHER_ACTIVITIES_BOTTOM_APP_BAR_FAB_CHANGE_POST_LAYOUT: {
-                    PostLayoutBottomSheetFragment postLayoutBottomSheetFragment = new PostLayoutBottomSheetFragment();
+                    showPostLayoutBottomSheetFragment();
-                    postLayoutBottomSheetFragment.show(getSupportFragmentManager(), postLayoutBottomSheetFragment.getTag());
                     break;
                 }
                 case SharedPreferencesUtils.OTHER_ACTIVITIES_BOTTOM_APP_BAR_FAB_SEARCH: {
@@ -324,6 +397,175 @@ public class ViewMultiRedditDetailActivity extends BaseActivity implements SortT
         getSupportFragmentManager().beginTransaction().replace(R.id.frame_layout_view_multi_reddit_detail_activity, mFragment).commit();
     }
 
+    private void bottomAppBarOptionAction(int option) {
+        switch (option) {
+            case SharedPreferencesUtils.OTHER_ACTIVITIES_BOTTOM_APP_BAR_OPTION_HOME: {
+                EventBus.getDefault().post(new GoBackToMainPageEvent());
+                break;
+            }
+            case SharedPreferencesUtils.OTHER_ACTIVITIES_BOTTOM_APP_BAR_OPTION_SUBSCRIPTIONS: {
+                Intent intent = new Intent(this, SubscribedThingListingActivity.class);
+                startActivity(intent);
+                break;
+            }
+            case SharedPreferencesUtils.OTHER_ACTIVITIES_BOTTOM_APP_BAR_OPTION_INBOX: {
+                Intent intent = new Intent(this, InboxActivity.class);
+                startActivity(intent);
+                break;
+            }
+            case SharedPreferencesUtils.OTHER_ACTIVITIES_BOTTOM_APP_BAR_OPTION_PROFILE: {
+                Intent intent = new Intent(this, ViewUserDetailActivity.class);
+                intent.putExtra(ViewUserDetailActivity.EXTRA_USER_NAME_KEY, mAccountName);
+                startActivity(intent);
+                break;
+            }
+            case SharedPreferencesUtils.OTHER_ACTIVITIES_BOTTOM_APP_BAR_OPTION_MULTIREDDITS: {
+                Intent intent = new Intent(this, SubscribedThingListingActivity.class);
+                intent.putExtra(SubscribedThingListingActivity.EXTRA_SHOW_MULTIREDDITS, true);
+                startActivity(intent);
+                break;
+            }
+            case SharedPreferencesUtils.OTHER_ACTIVITIES_BOTTOM_APP_BAR_OPTION_REFRESH: {
+                if (mFragment instanceof PostFragment) {
+                    ((PostFragment) mFragment).refresh();
+                }
+                break;
+            }
+            case SharedPreferencesUtils.OTHER_ACTIVITIES_BOTTOM_APP_BAR_OPTION_CHANGE_SORT_TYPE: {
+                showSortTypeBottomSheetFragment();
+                break;
+            }
+            case SharedPreferencesUtils.OTHER_ACTIVITIES_BOTTOM_APP_BAR_OPTION_CHANGE_POST_LAYOUT: {
+                showPostLayoutBottomSheetFragment();
+                break;
+            }
+            case SharedPreferencesUtils.OTHER_ACTIVITIES_BOTTOM_APP_BAR_OPTION_SEARCH: {
+                Intent intent = new Intent(this, SearchActivity.class);
+                startActivity(intent);
+                break;
+            }
+            case SharedPreferencesUtils.OTHER_ACTIVITIES_BOTTOM_APP_BAR_OPTION_GO_TO_SUBREDDIT:
+                goToSubreddit();
+                break;
+            case SharedPreferencesUtils.OTHER_ACTIVITIES_BOTTOM_APP_BAR_OPTION_GO_TO_USER:
+                goToUser();
+                break;
+            case SharedPreferencesUtils.OTHER_ACTIVITIES_BOTTOM_APP_BAR_OPTION_RANDOM:
+                random();
+                break;
+            case SharedPreferencesUtils.OTHER_ACTIVITIES_BOTTOM_APP_BAR_OPTION_HIDE_READ_POSTS:
+                if (mFragment instanceof PostFragment) {
+                    ((PostFragment) mFragment).hideReadPosts();
+                }
+                break;
+            case SharedPreferencesUtils.OTHER_ACTIVITIES_BOTTOM_APP_BAR_OPTION_FILTER_POSTS:
+                if (mFragment instanceof PostFragment) {
+                    ((PostFragment) mFragment).filterPosts();
+                }
+                break;
+            case SharedPreferencesUtils.OTHER_ACTIVITIES_BOTTOM_APP_BAR_OPTION_UPVOTED: {
+                Intent intent = new Intent(this, AccountPostsActivity.class);
+                intent.putExtra(AccountPostsActivity.EXTRA_USER_WHERE, PostPagingSource.USER_WHERE_UPVOTED);
+                startActivity(intent);
+                break;
+            }
+            case SharedPreferencesUtils.OTHER_ACTIVITIES_BOTTOM_APP_BAR_OPTION_DOWNVOTED: {
+                Intent intent = new Intent(this, AccountPostsActivity.class);
+                intent.putExtra(AccountPostsActivity.EXTRA_USER_WHERE, PostPagingSource.USER_WHERE_DOWNVOTED);
+                startActivity(intent);
+                break;
+            }
+            case SharedPreferencesUtils.OTHER_ACTIVITIES_BOTTOM_APP_BAR_OPTION_HIDDEN: {
+                Intent intent = new Intent(this, AccountPostsActivity.class);
+                intent.putExtra(AccountPostsActivity.EXTRA_USER_WHERE, PostPagingSource.USER_WHERE_HIDDEN);
+                startActivity(intent);
+                break;
+            }
+            case SharedPreferencesUtils.OTHER_ACTIVITIES_BOTTOM_APP_BAR_OPTION_SAVED: {
+                Intent intent = new Intent(this, AccountPostsActivity.class);
+                intent.putExtra(AccountPostsActivity.EXTRA_USER_WHERE, PostPagingSource.USER_WHERE_SAVED);
+                startActivity(intent);
+                break;
+            }
+            case SharedPreferencesUtils.OTHER_ACTIVITIES_BOTTOM_APP_BAR_OPTION_GILDED: {
+                Intent intent = new Intent(this, AccountPostsActivity.class);
+                intent.putExtra(AccountPostsActivity.EXTRA_USER_WHERE, PostPagingSource.USER_WHERE_GILDED);
+                startActivity(intent);
+                break;
+            }
+            case SharedPreferencesUtils.OTHER_ACTIVITIES_BOTTOM_APP_BAR_OPTION_GO_TO_TOP: {
+                if (mFragment instanceof PostFragment) {
+                    ((PostFragment) mFragment).goBackToTop();
+                }
+                break;
+            }
+            default:
+                PostTypeBottomSheetFragment postTypeBottomSheetFragment = new PostTypeBottomSheetFragment();
+                postTypeBottomSheetFragment.show(getSupportFragmentManager(), postTypeBottomSheetFragment.getTag());
+                break;
+        }
+    }
+
+    private int getBottomAppBarOptionDrawableResource(int option) {
+        switch (option) {
+            case SharedPreferencesUtils.OTHER_ACTIVITIES_BOTTOM_APP_BAR_OPTION_HOME:
+                return R.drawable.ic_home_black_24dp;
+            case SharedPreferencesUtils.OTHER_ACTIVITIES_BOTTOM_APP_BAR_OPTION_SUBSCRIPTIONS:
+                return R.drawable.ic_subscritptions_bottom_app_bar_24dp;
+            case SharedPreferencesUtils.OTHER_ACTIVITIES_BOTTOM_APP_BAR_OPTION_INBOX:
+                return R.drawable.ic_inbox_24dp;
+            case SharedPreferencesUtils.OTHER_ACTIVITIES_BOTTOM_APP_BAR_OPTION_MULTIREDDITS:
+                return R.drawable.ic_multi_reddit_24dp;
+            case SharedPreferencesUtils.OTHER_ACTIVITIES_BOTTOM_APP_BAR_OPTION_SUBMIT_POSTS:
+                return R.drawable.ic_add_day_night_24dp;
+            case SharedPreferencesUtils.OTHER_ACTIVITIES_BOTTOM_APP_BAR_OPTION_REFRESH:
+                return R.drawable.ic_refresh_24dp;
+            case SharedPreferencesUtils.OTHER_ACTIVITIES_BOTTOM_APP_BAR_OPTION_CHANGE_SORT_TYPE:
+                return R.drawable.ic_sort_toolbar_24dp;
+            case SharedPreferencesUtils.OTHER_ACTIVITIES_BOTTOM_APP_BAR_OPTION_CHANGE_POST_LAYOUT:
+                return R.drawable.ic_post_layout_24dp;
+            case SharedPreferencesUtils.OTHER_ACTIVITIES_BOTTOM_APP_BAR_OPTION_SEARCH:
+                return R.drawable.ic_search_black_24dp;
+            case SharedPreferencesUtils.OTHER_ACTIVITIES_BOTTOM_APP_BAR_OPTION_GO_TO_SUBREDDIT:
+                return R.drawable.ic_subreddit_24dp;
+            case SharedPreferencesUtils.OTHER_ACTIVITIES_BOTTOM_APP_BAR_OPTION_GO_TO_USER:
+                return R.drawable.ic_user_24dp;
+            case SharedPreferencesUtils.OTHER_ACTIVITIES_BOTTOM_APP_BAR_OPTION_RANDOM:
+                return R.drawable.ic_random_24dp;
+            case SharedPreferencesUtils.OTHER_ACTIVITIES_BOTTOM_APP_BAR_OPTION_HIDE_READ_POSTS:
+                return R.drawable.ic_hide_read_posts_24dp;
+            case SharedPreferencesUtils.OTHER_ACTIVITIES_BOTTOM_APP_BAR_OPTION_FILTER_POSTS:
+                return R.drawable.ic_filter_24dp;
+            case SharedPreferencesUtils.OTHER_ACTIVITIES_BOTTOM_APP_BAR_OPTION_UPVOTED:
+                return R.drawable.ic_arrow_upward_black_24dp;
+            case SharedPreferencesUtils.OTHER_ACTIVITIES_BOTTOM_APP_BAR_OPTION_DOWNVOTED:
+                return R.drawable.ic_arrow_downward_black_24dp;
+            case SharedPreferencesUtils.OTHER_ACTIVITIES_BOTTOM_APP_BAR_OPTION_HIDDEN:
+                return R.drawable.ic_outline_lock_24dp;
+            case SharedPreferencesUtils.OTHER_ACTIVITIES_BOTTOM_APP_BAR_OPTION_SAVED:
+                return R.drawable.ic_outline_bookmarks_24dp;
+            case SharedPreferencesUtils.OTHER_ACTIVITIES_BOTTOM_APP_BAR_OPTION_GILDED:
+                return R.drawable.ic_star_border_24dp;
+            case SharedPreferencesUtils.OTHER_ACTIVITIES_BOTTOM_APP_BAR_OPTION_GO_TO_TOP:
+                return R.drawable.ic_keyboard_double_arrow_up_24;
+            default:
+                return R.drawable.ic_account_circle_24dp;
+        }
+    }
+
+    private void showSortTypeBottomSheetFragment() {
+        SortTypeBottomSheetFragment sortTypeBottomSheetFragment = new SortTypeBottomSheetFragment();
+        Bundle bottomSheetBundle = new Bundle();
+        bottomSheetBundle.putBoolean(SortTypeBottomSheetFragment.EXTRA_NO_BEST_TYPE, true);
+        sortTypeBottomSheetFragment.setArguments(bottomSheetBundle);
+        sortTypeBottomSheetFragment.show(getSupportFragmentManager(), sortTypeBottomSheetFragment.getTag());
+    }
+
+    private void showPostLayoutBottomSheetFragment() {
+        PostLayoutBottomSheetFragment postLayoutBottomSheetFragment = new PostLayoutBottomSheetFragment();
+        postLayoutBottomSheetFragment.show(getSupportFragmentManager(), postLayoutBottomSheetFragment.getTag());
+    }
+
     private void goToSubreddit() {
         View rootView = getLayoutInflater().inflate(R.layout.dialog_go_to_thing_edit_text, coordinatorLayout, false);
         TextInputEditText thingEditText = rootView.findViewById(R.id.text_input_edit_text_go_to_thing_edit_text);
@@ -492,7 +734,7 @@ public class ViewMultiRedditDetailActivity extends BaseActivity implements SortT
             finish();
             return true;
         } else if (itemId == R.id.action_sort_view_multi_reddit_detail_activity) {
-            sortTypeBottomSheetFragment.show(getSupportFragmentManager(), sortTypeBottomSheetFragment.getTag());
+            showSortTypeBottomSheetFragment();
             return true;
         } else if (itemId == R.id.action_search_view_multi_reddit_detail_activity) {
             Intent intent = new Intent(this, SearchActivity.class);
@@ -504,7 +746,7 @@ public class ViewMultiRedditDetailActivity extends BaseActivity implements SortT
             }
             return true;
         } else if (itemId == R.id.action_change_post_layout_view_multi_reddit_detail_activity) {
-            postLayoutBottomSheetFragment.show(getSupportFragmentManager(), postLayoutBottomSheetFragment.getTag());
+            showPostLayoutBottomSheetFragment();
             return true;
         } else if (itemId == R.id.action_edit_view_multi_reddit_detail_activity) {
             Intent editIntent = new Intent(this, EditMultiRedditActivity.class);
@@ -555,6 +797,12 @@ public class ViewMultiRedditDetailActivity extends BaseActivity implements SortT
         getSupportFragmentManager().putFragment(outState, FRAGMENT_OUT_STATE_KEY, mFragment);
     }
 
+    @Override
+    protected void onDestroy() {
+        super.onDestroy();
+        EventBus.getDefault().unregister(this);
+    }
+
     @Override
     public void sortTypeSelected(SortType sortType) {
         ((PostFragment) mFragment).changeSortType(sortType);
@@ -563,6 +811,7 @@ public class ViewMultiRedditDetailActivity extends BaseActivity implements SortT
 
     @Override
     public void sortTypeSelected(String sortType) {
+        SortTimeBottomSheetFragment sortTimeBottomSheetFragment = new SortTimeBottomSheetFragment();
         Bundle bundle = new Bundle();
         bundle.putString(SortTimeBottomSheetFragment.EXTRA_SORT_TYPE, sortType);
         sortTimeBottomSheetFragment.setArguments(bundle);
@@ -591,6 +840,12 @@ public class ViewMultiRedditDetailActivity extends BaseActivity implements SortT
     protected void applyCustomTheme() {
         coordinatorLayout.setBackgroundColor(mCustomThemeWrapper.getBackgroundColor());
         applyAppBarLayoutAndCollapsingToolbarLayoutAndToolbarTheme(appBarLayout, collapsingToolbarLayout, toolbar);
+        bottomNavigationView.setBackgroundTint(ColorStateList.valueOf(mCustomThemeWrapper.getBottomAppBarBackgroundColor()));
+        int bottomAppBarIconColor = mCustomThemeWrapper.getBottomAppBarIconColor();
+        option2BottomAppBar.setColorFilter(bottomAppBarIconColor, PorterDuff.Mode.SRC_IN);
+        option1BottomAppBar.setColorFilter(bottomAppBarIconColor, PorterDuff.Mode.SRC_IN);
+        option3BottomAppBar.setColorFilter(bottomAppBarIconColor, PorterDuff.Mode.SRC_IN);
+        option4BottomAppBar.setColorFilter(bottomAppBarIconColor, PorterDuff.Mode.SRC_IN);
         applyFABTheme(fab);
     }
 
@@ -657,11 +912,10 @@ public class ViewMultiRedditDetailActivity extends BaseActivity implements SortT
                 }
                 break;
             case FABMoreOptionsBottomSheetFragment.FAB_OPTION_CHANGE_SORT_TYPE:
-                sortTypeBottomSheetFragment.show(getSupportFragmentManager(), sortTypeBottomSheetFragment.getTag());
+                showSortTypeBottomSheetFragment();
                 break;
             case FABMoreOptionsBottomSheetFragment.FAB_OPTION_CHANGE_POST_LAYOUT:
-                PostLayoutBottomSheetFragment postLayoutBottomSheetFragment = new PostLayoutBottomSheetFragment();
+                showPostLayoutBottomSheetFragment();
-                postLayoutBottomSheetFragment.show(getSupportFragmentManager(), postLayoutBottomSheetFragment.getTag());
                 break;
             case FABMoreOptionsBottomSheetFragment.FAB_OPTION_SEARCH:
                 Intent intent = new Intent(this, SearchActivity.class);
@@ -700,4 +954,36 @@ public class ViewMultiRedditDetailActivity extends BaseActivity implements SortT
         intent.putExtra(FetchRandomSubredditOrPostActivity.EXTRA_RANDOM_OPTION, option);
         startActivity(intent);
     }
+
+    @Override
+    public void contentScrollUp() {
+        if (showBottomAppBar && !lockBottomAppBar) {
+            bottomNavigationView.performShow();
+        }
+        if (!(showBottomAppBar && lockBottomAppBar)) {
+            fab.show();
+        }
+    }
+
+    @Override
+    public void contentScrollDown() {
+        if (!(showBottomAppBar && lockBottomAppBar)) {
+            fab.hide();
+        }
+        if (showBottomAppBar && !lockBottomAppBar) {
+            bottomNavigationView.performHide();
+        }
+    }
+
+    @Subscribe
+    public void goBackToMainPageEvent(GoBackToMainPageEvent event) {
+        finish();
+    }
+
+    @Subscribe
+    public void onAccountSwitchEvent(SwitchAccountEvent event) {
+        if (!getClass().getName().equals(event.excludeActivityClassName)) {
+            finish();
+        }
+    }
 }

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

@@ -887,8 +887,6 @@ public class ViewUserDetailActivity extends BaseActivity implements SortTypeSele
             fabMoreOptionsBottomSheetFragment.show(getSupportFragmentManager(), fabMoreOptionsBottomSheetFragment.getTag());
             return true;
         });
-
-        fab.setVisibility(View.VISIBLE);
     }
 
     private void bottomAppBarOptionAction(int option) {

app/src/main/java/ml/docilealligator/infinityforreddit/adapters/CommentsListingRecyclerViewAdapter.java

@@ -20,7 +20,6 @@ import android.widget.TextView;
 import android.widget.Toast;
 
 import androidx.annotation.NonNull;
-import androidx.appcompat.app.AppCompatActivity;
 import androidx.constraintlayout.widget.ConstraintLayout;
 import androidx.constraintlayout.widget.ConstraintSet;
 import androidx.paging.PagedListAdapter;

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

@@ -39,11 +39,17 @@
         android:layout_height="match_parent"
         app:layout_behavior="@string/appbar_scrolling_view_behavior" />
 
+    <include
+        layout="@layout/bottom_app_bar"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:layout_gravity="bottom" />
+
     <com.google.android.material.floatingactionbutton.FloatingActionButton
         android:id="@+id/fab_view_multi_reddit_detail_activity"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:layout_margin="@dimen/fab_margin"
-        android:layout_gravity="bottom|end" />
+        app:layout_anchor="@id/bottom_app_bar_bottom_app_bar" />
 
 </androidx.coordinatorlayout.widget.CoordinatorLayout>

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

@@ -151,7 +151,6 @@
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:layout_margin="@dimen/fab_margin"
-        android:visibility="gone"
         app:layout_anchor="@id/bottom_app_bar_bottom_app_bar" />
 
 </androidx.coordinatorlayout.widget.CoordinatorLayout>