Use Navigation Rail in MainActivity in landscape mode.

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

@@ -7,7 +7,6 @@ import android.app.Activity;
 import android.content.Context;
 import android.content.Intent;
 import android.content.SharedPreferences;
-import android.content.res.ColorStateList;
 import android.graphics.Color;
 import android.os.Build;
 import android.os.Bundle;
@@ -23,8 +22,6 @@ 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;
@@ -51,9 +48,7 @@ import androidx.work.WorkManager;
 import com.google.android.material.appbar.AppBarLayout;
 import com.google.android.material.appbar.CollapsingToolbarLayout;
 import com.google.android.material.appbar.MaterialToolbar;
-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.navigation.NavigationView;
 import com.google.android.material.tabs.TabLayout;
 import com.google.android.material.tabs.TabLayoutMediator;
@@ -98,6 +93,7 @@ import ml.docilealligator.infinityforreddit.bottomsheetfragments.SortTimeBottomS
 import ml.docilealligator.infinityforreddit.bottomsheetfragments.SortTypeBottomSheetFragment;
 import ml.docilealligator.infinityforreddit.customtheme.CustomThemeWrapper;
 import ml.docilealligator.infinityforreddit.customviews.LinearLayoutManagerBugFixed;
+import ml.docilealligator.infinityforreddit.customviews.NavigationWrapper;
 import ml.docilealligator.infinityforreddit.events.ChangeDisableSwipingBetweenTabsEvent;
 import ml.docilealligator.infinityforreddit.events.ChangeInboxCountEvent;
 import ml.docilealligator.infinityforreddit.events.ChangeLockBottomAppBarEvent;
@@ -164,7 +160,7 @@ public class MainActivity extends BaseActivity implements SortTypeSelectionCallb
     RecyclerView navDrawerRecyclerView;
     @BindView(R.id.tab_layout_main_activity)
     TabLayout tabLayout;
-    @BindView(R.id.bottom_app_bar_bottom_app_bar)
+    /*@BindView(R.id.bottom_app_bar_bottom_app_bar)
     BottomAppBar bottomAppBar;
     @BindView(R.id.linear_layout_bottom_app_bar)
     LinearLayout linearLayoutBottomAppBar;
@@ -175,9 +171,9 @@ public class MainActivity extends BaseActivity implements SortTypeSelectionCallb
     @BindView(R.id.option_3_bottom_app_bar)
     ImageView option3BottomAppBar;
     @BindView(R.id.option_4_bottom_app_bar)
-    ImageView option4BottomAppBar;
+    ImageView option4BottomAppBar;*/
-    @BindView(R.id.fab_main_activity)
+    /*@BindView(R.id.fab_main_activity)
-    FloatingActionButton fab;
+    FloatingActionButton fab;*/
     MultiRedditViewModel multiRedditViewModel;
     SubscribedSubredditViewModel subscribedSubredditViewModel;
     AccountViewModel accountViewModel;
@@ -242,6 +238,8 @@ public class MainActivity extends BaseActivity implements SortTypeSelectionCallb
     private int fabOption;
     private int inboxCount;
 
+    private NavigationWrapper navigationWrapper;
+
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         ((Infinity) getApplication()).getAppComponent().inject(this);
@@ -256,6 +254,14 @@ public class MainActivity extends BaseActivity implements SortTypeSelectionCallb
 
         ButterKnife.bind(this);
 
+        showBottomAppBar = mSharedPreferences.getBoolean(SharedPreferencesUtils.BOTTOM_APP_BAR_KEY, false);
+
+        navigationWrapper = new NavigationWrapper(findViewById(R.id.bottom_app_bar_bottom_app_bar), findViewById(R.id.linear_layout_bottom_app_bar),
+                findViewById(R.id.option_1_bottom_app_bar), findViewById(R.id.option_2_bottom_app_bar),
+                findViewById(R.id.option_3_bottom_app_bar), findViewById(R.id.option_4_bottom_app_bar),
+                findViewById(R.id.fab_main_activity),
+                findViewById(R.id.navigation_rail), showBottomAppBar);
+
         EventBus.getDefault().register(this);
 
         applyCustomTheme();
@@ -279,11 +285,15 @@ public class MainActivity extends BaseActivity implements SortTypeSelectionCallb
 
                 int navBarHeight = getNavBarHeight();
                 if (navBarHeight > 0) {
-                    CoordinatorLayout.LayoutParams params = (CoordinatorLayout.LayoutParams) fab.getLayoutParams();
+                    if (navigationWrapper.navigationRailView == null) {
-                    params.bottomMargin += navBarHeight;
+                        CoordinatorLayout.LayoutParams params = (CoordinatorLayout.LayoutParams) navigationWrapper.floatingActionButton.getLayoutParams();
-                    fab.setLayoutParams(params);
+                        params.bottomMargin += navBarHeight;
-                    linearLayoutBottomAppBar.setPadding(0,
+                        navigationWrapper.floatingActionButton.setLayoutParams(params);
-                            linearLayoutBottomAppBar.getPaddingTop(), 0, navBarHeight);
+                    }
+                    if (navigationWrapper.linearLayoutBottomAppBar != null) {
+                        navigationWrapper.linearLayoutBottomAppBar.setPadding(0,
+                                navigationWrapper.linearLayoutBottomAppBar.getPaddingTop(), 0, navBarHeight);
+                    }
                     navDrawerRecyclerView.setPadding(0, 0, 0, navBarHeight);
                 }
             } else {
@@ -308,7 +318,6 @@ public class MainActivity extends BaseActivity implements SortTypeSelectionCallb
         });
         toggle.syncState();
 
-        showBottomAppBar = mSharedPreferences.getBoolean(SharedPreferencesUtils.BOTTOM_APP_BAR_KEY, false);
         mBackButtonAction = Integer.parseInt(mSharedPreferences.getString(SharedPreferencesUtils.MAIN_PAGE_BACK_BUTTON_ACTION, "0"));
         mLockBottomAppBar = mSharedPreferences.getBoolean(SharedPreferencesUtils.LOCK_BOTTOM_APP_BAR, false);
         mDisableSwipingBetweenTabs = mSharedPreferences.getBoolean(SharedPreferencesUtils.DISABLE_SWIPING_BETWEEN_TABS, false);
@@ -348,15 +357,16 @@ public class MainActivity extends BaseActivity implements SortTypeSelectionCallb
         int backgroundColor = mCustomThemeWrapper.getBackgroundColor();
         drawer.setBackgroundColor(backgroundColor);
         int bottomAppBarIconColor = mCustomThemeWrapper.getBottomAppBarIconColor();
-        option1BottomAppBar.setColorFilter(bottomAppBarIconColor, android.graphics.PorterDuff.Mode.SRC_IN);
+        navigationWrapper.applyCustomTheme(bottomAppBarIconColor, mCustomThemeWrapper.getBottomAppBarBackgroundColor());
+        /*option1BottomAppBar.setColorFilter(bottomAppBarIconColor, android.graphics.PorterDuff.Mode.SRC_IN);
         option2BottomAppBar.setColorFilter(bottomAppBarIconColor, android.graphics.PorterDuff.Mode.SRC_IN);
         option3BottomAppBar.setColorFilter(bottomAppBarIconColor, android.graphics.PorterDuff.Mode.SRC_IN);
-        option4BottomAppBar.setColorFilter(bottomAppBarIconColor, android.graphics.PorterDuff.Mode.SRC_IN);
+        option4BottomAppBar.setColorFilter(bottomAppBarIconColor, android.graphics.PorterDuff.Mode.SRC_IN);*/
         navigationView.setBackgroundColor(backgroundColor);
         applyAppBarLayoutAndCollapsingToolbarLayoutAndToolbarTheme(appBarLayout, collapsingToolbarLayout, toolbar);
         applyTabLayoutTheme(tabLayout);
-        bottomAppBar.setBackgroundTint(ColorStateList.valueOf(mCustomThemeWrapper.getBottomAppBarBackgroundColor()));
+        //bottomAppBar.setBackgroundTint(ColorStateList.valueOf());
-        applyFABTheme(fab);
+        applyFABTheme(navigationWrapper.floatingActionButton);
     }
 
     private void initializeNotificationAndBindView() {
@@ -577,100 +587,140 @@ public class MainActivity extends BaseActivity implements SortTypeSelectionCallb
             int option1 = mBottomAppBarSharedPreference.getInt((mAccessToken == null ? "-" : "") + SharedPreferencesUtils.MAIN_ACTIVITY_BOTTOM_APP_BAR_OPTION_1, SharedPreferencesUtils.MAIN_ACTIVITY_BOTTOM_APP_BAR_OPTION_SUBSCRIPTIONS);
             int option2 = mBottomAppBarSharedPreference.getInt((mAccessToken == null ? "-" : "") + SharedPreferencesUtils.MAIN_ACTIVITY_BOTTOM_APP_BAR_OPTION_2, SharedPreferencesUtils.MAIN_ACTIVITY_BOTTOM_APP_BAR_OPTION_MULTIREDDITS);
 
-            bottomAppBar.setVisibility(View.VISIBLE);
+            //bottomAppBar.setVisibility(View.VISIBLE);
 
             if (optionCount == 2) {
-                linearLayoutBottomAppBar.setWeightSum(3);
+                navigationWrapper.bindOptionDrawableResource(getBottomAppBarOptionDrawableResource(option1), getBottomAppBarOptionDrawableResource(option2));
+
+                /*linearLayoutBottomAppBar.setWeightSum(3);
                 option1BottomAppBar.setVisibility(View.GONE);
                 option3BottomAppBar.setVisibility(View.GONE);
 
                 option2BottomAppBar.setImageResource(getBottomAppBarOptionDrawableResource(option1));
-                option4BottomAppBar.setImageResource(getBottomAppBarOptionDrawableResource(option2));
+                option4BottomAppBar.setImageResource(getBottomAppBarOptionDrawableResource(option2));*/
 
-                option2BottomAppBar.setOnClickListener(view -> {
+                if (navigationWrapper.navigationRailView == null) {
-                    bottomAppBarOptionAction(option1);
+                    navigationWrapper.option2BottomAppBar.setOnClickListener(view -> {
-                });
+                        bottomAppBarOptionAction(option1);
+                    });
 
-                option4BottomAppBar.setOnClickListener(view -> {
+                    navigationWrapper.option4BottomAppBar.setOnClickListener(view -> {
-                    bottomAppBarOptionAction(option2);
+                        bottomAppBarOptionAction(option2);
-                });
+                    });
+                } else {
+                    navigationWrapper.navigationRailView.setOnItemSelectedListener(item -> {
+                        int itemId = item.getItemId();
+                        if (itemId == R.id.navigation_rail_option_1) {
+                            bottomAppBarOptionAction(option1);
+                            return true;
+                        } else if (itemId == R.id.navigation_rail_option_2) {
+                            bottomAppBarOptionAction(option2);
+                            return true;
+                        }
+                        return false;
+                    });
+                }
             } else {
                 int option3 = mBottomAppBarSharedPreference.getInt((mAccessToken == null ? "-" : "") + SharedPreferencesUtils.MAIN_ACTIVITY_BOTTOM_APP_BAR_OPTION_3, mAccessToken == null ? SharedPreferencesUtils.MAIN_ACTIVITY_BOTTOM_APP_BAR_OPTION_REFRESH : SharedPreferencesUtils.MAIN_ACTIVITY_BOTTOM_APP_BAR_OPTION_INBOX);
                 int option4 = mBottomAppBarSharedPreference.getInt((mAccessToken == null ? "-" : "") + SharedPreferencesUtils.MAIN_ACTIVITY_BOTTOM_APP_BAR_OPTION_4, mAccessToken == null ? SharedPreferencesUtils.MAIN_ACTIVITY_BOTTOM_APP_BAR_OPTION_CHANGE_SORT_TYPE : SharedPreferencesUtils.MAIN_ACTIVITY_BOTTOM_APP_BAR_OPTION_PROFILE);
 
-                option1BottomAppBar.setImageResource(getBottomAppBarOptionDrawableResource(option1));
+                navigationWrapper.bindOptionDrawableResource(getBottomAppBarOptionDrawableResource(option1),
-                option2BottomAppBar.setImageResource(getBottomAppBarOptionDrawableResource(option2));
+                        getBottomAppBarOptionDrawableResource(option2), getBottomAppBarOptionDrawableResource(option3),
-                option3BottomAppBar.setImageResource(getBottomAppBarOptionDrawableResource(option3));
+                        getBottomAppBarOptionDrawableResource(option4));
-                option4BottomAppBar.setImageResource(getBottomAppBarOptionDrawableResource(option4));
 
-                option1BottomAppBar.setOnClickListener(view -> {
+                /*navigationWrapper.option1BottomAppBar.setImageResource(getBottomAppBarOptionDrawableResource(option1));
-                    bottomAppBarOptionAction(option1);
+                navigationWrapper.option2BottomAppBar.setImageResource(getBottomAppBarOptionDrawableResource(option2));
-                });
+                navigationWrapper.option3BottomAppBar.setImageResource(getBottomAppBarOptionDrawableResource(option3));
+                navigationWrapper.option4BottomAppBar.setImageResource(getBottomAppBarOptionDrawableResource(option4));*/
 
-                option2BottomAppBar.setOnClickListener(view -> {
+                if (navigationWrapper.navigationRailView == null) {
-                    bottomAppBarOptionAction(option2);
+                    navigationWrapper.option1BottomAppBar.setOnClickListener(view -> {
-                });
+                        bottomAppBarOptionAction(option1);
+                    });
 
-                option3BottomAppBar.setOnClickListener(view -> {
+                    navigationWrapper.option2BottomAppBar.setOnClickListener(view -> {
-                    bottomAppBarOptionAction(option3);
+                        bottomAppBarOptionAction(option2);
-                });
+                    });
 
-                option4BottomAppBar.setOnClickListener(view -> {
+                    navigationWrapper.option3BottomAppBar.setOnClickListener(view -> {
-                    bottomAppBarOptionAction(option4);
+                        bottomAppBarOptionAction(option3);
-                });
+                    });
+
+                    navigationWrapper.option4BottomAppBar.setOnClickListener(view -> {
+                        bottomAppBarOptionAction(option4);
+                    });
+                } else {
+                    navigationWrapper.navigationRailView.setOnItemSelectedListener(item -> {
+                        int itemId = item.getItemId();
+                        if (itemId == R.id.navigation_rail_option_1) {
+                            bottomAppBarOptionAction(option1);
+                            return true;
+                        } else if (itemId == R.id.navigation_rail_option_2) {
+                            bottomAppBarOptionAction(option2);
+                            return true;
+                        } else if (itemId == R.id.navigation_rail_option_3) {
+                            bottomAppBarOptionAction(option3);
+                            return true;
+                        } else if (itemId == R.id.navigation_rail_option_4) {
+                            bottomAppBarOptionAction(option4);
+                            return true;
+                        }
+                        return false;
+                    });
+                }
             }
         } else {
-            CoordinatorLayout.LayoutParams lp = (CoordinatorLayout.LayoutParams) fab.getLayoutParams();
+            CoordinatorLayout.LayoutParams lp = (CoordinatorLayout.LayoutParams) navigationWrapper.floatingActionButton.getLayoutParams();
             lp.setAnchorId(View.NO_ID);
             lp.gravity = Gravity.END | Gravity.BOTTOM;
-            fab.setLayoutParams(lp);
+            navigationWrapper.floatingActionButton.setLayoutParams(lp);
         }
 
         fabOption = mBottomAppBarSharedPreference.getInt((mAccessToken == null ? "-" : "") + SharedPreferencesUtils.MAIN_ACTIVITY_BOTTOM_APP_BAR_FAB,
                 SharedPreferencesUtils.MAIN_ACTIVITY_BOTTOM_APP_BAR_FAB_SUBMIT_POSTS);
         switch (fabOption) {
             case SharedPreferencesUtils.MAIN_ACTIVITY_BOTTOM_APP_BAR_FAB_REFRESH:
-                fab.setImageResource(R.drawable.ic_refresh_24dp);
+                navigationWrapper.floatingActionButton.setImageResource(R.drawable.ic_refresh_24dp);
                 break;
             case SharedPreferencesUtils.MAIN_ACTIVITY_BOTTOM_APP_BAR_FAB_CHANGE_SORT_TYPE:
-                fab.setImageResource(R.drawable.ic_sort_toolbar_24dp);
+                navigationWrapper.floatingActionButton.setImageResource(R.drawable.ic_sort_toolbar_24dp);
                 break;
             case SharedPreferencesUtils.MAIN_ACTIVITY_BOTTOM_APP_BAR_FAB_CHANGE_POST_LAYOUT:
-                fab.setImageResource(R.drawable.ic_post_layout_24dp);
+                navigationWrapper.floatingActionButton.setImageResource(R.drawable.ic_post_layout_24dp);
                 break;
             case SharedPreferencesUtils.MAIN_ACTIVITY_BOTTOM_APP_BAR_FAB_SEARCH:
-                fab.setImageResource(R.drawable.ic_search_24dp);
+                navigationWrapper.floatingActionButton.setImageResource(R.drawable.ic_search_24dp);
                 break;
             case SharedPreferencesUtils.MAIN_ACTIVITY_BOTTOM_APP_BAR_FAB_GO_TO_SUBREDDIT:
-                fab.setImageResource(R.drawable.ic_subreddit_24dp);
+                navigationWrapper.floatingActionButton.setImageResource(R.drawable.ic_subreddit_24dp);
                 break;
             case SharedPreferencesUtils.MAIN_ACTIVITY_BOTTOM_APP_BAR_FAB_GO_TO_USER:
-                fab.setImageResource(R.drawable.ic_user_24dp);
+                navigationWrapper.floatingActionButton.setImageResource(R.drawable.ic_user_24dp);
                 break;
             case SharedPreferencesUtils.MAIN_ACTIVITY_BOTTOM_APP_BAR_FAB_RANDOM:
-                fab.setImageResource(R.drawable.ic_random_24dp);
+                navigationWrapper.floatingActionButton.setImageResource(R.drawable.ic_random_24dp);
                 break;
             case SharedPreferencesUtils.MAIN_ACTIVITY_BOTTOM_APP_BAR_FAB_HIDE_READ_POSTS:
                 if (mAccessToken == null) {
-                    fab.setImageResource(R.drawable.ic_filter_24dp);
+                    navigationWrapper.floatingActionButton.setImageResource(R.drawable.ic_filter_24dp);
                     fabOption = SharedPreferencesUtils.MAIN_ACTIVITY_BOTTOM_APP_BAR_FAB_FILTER_POSTS;
                 } else {
-                    fab.setImageResource(R.drawable.ic_hide_read_posts_24dp);
+                    navigationWrapper.floatingActionButton.setImageResource(R.drawable.ic_hide_read_posts_24dp);
                 }
                 break;
             case SharedPreferencesUtils.MAIN_ACTIVITY_BOTTOM_APP_BAR_FAB_FILTER_POSTS:
-                fab.setImageResource(R.drawable.ic_filter_24dp);
+                navigationWrapper.floatingActionButton.setImageResource(R.drawable.ic_filter_24dp);
                 break;
             default:
                 if (mAccessToken == null) {
-                    fab.setImageResource(R.drawable.ic_filter_24dp);
+                    navigationWrapper.floatingActionButton.setImageResource(R.drawable.ic_filter_24dp);
                     fabOption = SharedPreferencesUtils.MAIN_ACTIVITY_BOTTOM_APP_BAR_FAB_FILTER_POSTS;
                 } else {
-                    fab.setImageResource(R.drawable.ic_add_day_night_24dp);
+                    navigationWrapper.floatingActionButton.setImageResource(R.drawable.ic_add_day_night_24dp);
                 }
                 break;
         }
-        fab.setOnClickListener(view -> {
+        navigationWrapper.floatingActionButton.setOnClickListener(view -> {
             switch (fabOption) {
                 case SharedPreferencesUtils.MAIN_ACTIVITY_BOTTOM_APP_BAR_FAB_REFRESH: {
                     if (sectionsPagerAdapter != null) {
@@ -717,7 +767,7 @@ public class MainActivity extends BaseActivity implements SortTypeSelectionCallb
                     break;
             }
         });
-        fab.setOnLongClickListener(view -> {
+        navigationWrapper.floatingActionButton.setOnLongClickListener(view -> {
             FABMoreOptionsBottomSheetFragment fabMoreOptionsBottomSheetFragment= new FABMoreOptionsBottomSheetFragment();
             Bundle bundle = new Bundle();
             bundle.putBoolean(FABMoreOptionsBottomSheetFragment.EXTRA_ANONYMOUS_MODE, mAccessToken == null);
@@ -725,7 +775,7 @@ public class MainActivity extends BaseActivity implements SortTypeSelectionCallb
             fabMoreOptionsBottomSheetFragment.show(getSupportFragmentManager(), fabMoreOptionsBottomSheetFragment.getTag());
             return true;
         });
-        fab.setVisibility(View.VISIBLE);
+        navigationWrapper.floatingActionButton.setVisibility(View.VISIBLE);
 
         adapter = new NavigationDrawerRecyclerViewMergedAdapter(this, mSharedPreferences,
                 mNsfwAndSpoilerSharedPreferences, mNavigationDrawerSharedPreferences, mSecuritySharedPreferences,
@@ -893,10 +943,11 @@ public class MainActivity extends BaseActivity implements SortTypeSelectionCallb
             public void onPageSelected(int position) {
                 if (mAccessToken != null) {
                     if (showBottomAppBar) {
-                        bottomAppBar.performShow();
+                        navigationWrapper.showNavigation();
                     }
                 }
-                fab.show();
+                //fab.show();
+                navigationWrapper.showFab();
                 sectionsPagerAdapter.displaySortTypeInToolbar();
             }
         });
@@ -1179,20 +1230,24 @@ public class MainActivity extends BaseActivity implements SortTypeSelectionCallb
     @Override
     public void contentScrollUp() {
         if (showBottomAppBar && !mLockBottomAppBar) {
-            bottomAppBar.performShow();
+            //bottomAppBar.performShow();
+            navigationWrapper.showNavigation();
         }
         if (!(showBottomAppBar && mLockBottomAppBar)) {
-            fab.show();
+            //fab.show();
+            navigationWrapper.showFab();
         }
     }
 
     @Override
     public void contentScrollDown() {
         if (!(showBottomAppBar && mLockBottomAppBar)) {
-            fab.hide();
+            //fab.hide();
+            navigationWrapper.hideFab();
         }
         if (showBottomAppBar && !mLockBottomAppBar) {
-            bottomAppBar.performHide();
+            //bottomAppBar.performHide();
+            navigationWrapper.hideNavigation();
         }
     }
 

app/src/main/java/ml/docilealligator/infinityforreddit/customviews/NavigationWrapper.java

@@ -0,0 +1,142 @@
+package ml.docilealligator.infinityforreddit.customviews;
+
+import android.content.res.ColorStateList;
+import android.graphics.drawable.Drawable;
+import android.view.Menu;
+import android.view.MenuItem;
+import android.view.View;
+import android.widget.ImageView;
+import android.widget.LinearLayout;
+
+import androidx.appcompat.view.menu.MenuItemImpl;
+import androidx.core.graphics.drawable.DrawableCompat;
+
+import com.google.android.material.bottomappbar.BottomAppBar;
+import com.google.android.material.floatingactionbutton.FloatingActionButton;
+import com.google.android.material.navigationrail.NavigationRailView;
+
+import ml.docilealligator.infinityforreddit.R;
+
+public class NavigationWrapper {
+    public BottomAppBar bottomAppBar;
+    public LinearLayout linearLayoutBottomAppBar;
+    public ImageView option1BottomAppBar;
+    public ImageView option2BottomAppBar;
+    public ImageView option3BottomAppBar;
+    public ImageView option4BottomAppBar;
+
+    public NavigationRailView navigationRailView;
+    public FloatingActionButton floatingActionButton;
+
+    public NavigationWrapper(BottomAppBar bottomAppBar, LinearLayout linearLayoutBottomAppBar,
+                             ImageView option1BottomAppBar, ImageView option2BottomAppBar,
+                             ImageView option3BottomAppBar, ImageView option4BottomAppBar,
+                             FloatingActionButton floatingActionButton, NavigationRailView navigationRailView,
+                             boolean showBottomAppBar) {
+        this.bottomAppBar = bottomAppBar;
+        this.linearLayoutBottomAppBar = linearLayoutBottomAppBar;
+        this.option1BottomAppBar = option1BottomAppBar;
+        this.option2BottomAppBar = option2BottomAppBar;
+        this.option3BottomAppBar = option3BottomAppBar;
+        this.option4BottomAppBar = option4BottomAppBar;
+        this.navigationRailView = navigationRailView;
+        if (navigationRailView != null) {
+            if (showBottomAppBar) {
+                this.floatingActionButton = (FloatingActionButton) navigationRailView.getHeaderView();
+            } else {
+                navigationRailView.setVisibility(View.GONE);
+                this.floatingActionButton = floatingActionButton;
+            }
+        } else {
+            this.floatingActionButton = floatingActionButton;
+        }
+    }
+
+    public void applyCustomTheme(int bottomAppBarIconColor, int bottomAppBarBackgroundColor) {
+        if (navigationRailView == null) {
+            option1BottomAppBar.setColorFilter(bottomAppBarIconColor, android.graphics.PorterDuff.Mode.SRC_IN);
+            option2BottomAppBar.setColorFilter(bottomAppBarIconColor, android.graphics.PorterDuff.Mode.SRC_IN);
+            option3BottomAppBar.setColorFilter(bottomAppBarIconColor, android.graphics.PorterDuff.Mode.SRC_IN);
+            option4BottomAppBar.setColorFilter(bottomAppBarIconColor, android.graphics.PorterDuff.Mode.SRC_IN);
+            bottomAppBar.setBackgroundTint(ColorStateList.valueOf(bottomAppBarBackgroundColor));
+        } else {
+            navigationRailView.setBackgroundColor(bottomAppBarBackgroundColor);
+            applyMenuItemTheme(navigationRailView.getMenu(), bottomAppBarIconColor);
+        }
+    }
+
+    private void applyMenuItemTheme(Menu menu, int bottomAppBarIconColor) {
+        for (int i = 0; i < menu.size(); i++) {
+            MenuItem item = menu.getItem(i);
+            if (((MenuItemImpl) item).requestsActionButton()) {
+                Drawable drawable = item.getIcon();
+                if (drawable != null) {
+                    DrawableCompat.setTint(drawable, bottomAppBarIconColor);
+                    item.setIcon(drawable);
+                }
+            }
+        }
+    }
+
+    public void bindOptionDrawableResource(int... imageResources) {
+        if (navigationRailView == null) {
+            bottomAppBar.setVisibility(View.VISIBLE);
+        } else {
+            navigationRailView.setVisibility(View.VISIBLE);
+        }
+
+        if (imageResources.length == 2) {
+            if (navigationRailView == null) {
+                linearLayoutBottomAppBar.setWeightSum(3);
+                option1BottomAppBar.setVisibility(View.GONE);
+                option3BottomAppBar.setVisibility(View.GONE);
+
+                option2BottomAppBar.setImageResource(imageResources[0]);
+                option4BottomAppBar.setImageResource(imageResources[1]);
+            } else {
+                Menu menu = navigationRailView.getMenu();
+                menu.findItem(R.id.navigation_rail_option_1).setIcon(imageResources[0]);
+                menu.findItem(R.id.navigation_rail_option_2).setIcon(imageResources[1]);
+                menu.findItem(R.id.navigation_rail_option_3).setVisible(false);
+                menu.findItem(R.id.navigation_rail_option_4).setVisible(false);
+            }
+        } else {
+            if (navigationRailView == null) {
+                option1BottomAppBar.setImageResource(imageResources[0]);
+                option2BottomAppBar.setImageResource(imageResources[1]);
+                option3BottomAppBar.setImageResource(imageResources[2]);
+                option4BottomAppBar.setImageResource(imageResources[3]);
+            } else {
+                Menu menu = navigationRailView.getMenu();
+                menu.findItem(R.id.navigation_rail_option_1).setIcon(imageResources[0]);
+                menu.findItem(R.id.navigation_rail_option_2).setIcon(imageResources[1]);
+                menu.findItem(R.id.navigation_rail_option_3).setIcon(imageResources[2]);
+                menu.findItem(R.id.navigation_rail_option_4).setIcon(imageResources[3]);
+            }
+        }
+    }
+
+    public void showNavigation() {
+        if (bottomAppBar != null) {
+            bottomAppBar.performShow();
+        }
+    }
+
+    public void hideNavigation() {
+        if (bottomAppBar != null) {
+            bottomAppBar.performHide();
+        }
+    }
+
+    public void showFab() {
+        if (navigationRailView == null) {
+            floatingActionButton.show();
+        }
+    }
+
+    public void hideFab() {
+        if (navigationRailView == null) {
+            floatingActionButton.hide();
+        }
+    }
+}

app/src/main/res/layout-land/app_bar_main.xml

@@ -0,0 +1,76 @@
+<?xml version="1.0" encoding="utf-8"?>
+<androidx.coordinatorlayout.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:id="@+id/coordinator_layout_main_activity"
+    tools:application="ml.docilealligator.infinityforreddit.activities.MainActivity">
+
+    <com.google.android.material.appbar.AppBarLayout
+        android:id="@+id/appbar_layout_main_activity"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:theme="@style/AppTheme.AppBarOverlay">
+
+        <com.google.android.material.appbar.CollapsingToolbarLayout
+            android:id="@+id/collapsing_toolbar_layout_main_activity"
+            android:layout_width="match_parent"
+            android:layout_height="match_parent"
+            app:layout_scrollFlags="scroll|enterAlways"
+            app:titleEnabled="false"
+            app:toolbarId="@+id/toolbar">
+
+            <com.google.android.material.appbar.MaterialToolbar
+                android:id="@+id/toolbar"
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:minHeight="?attr/actionBarSize"
+                app:layout_collapseMode="pin"
+                app:layout_scrollFlags="scroll|enterAlways"
+                app:popupTheme="@style/AppTheme.PopupOverlay" />
+
+        </com.google.android.material.appbar.CollapsingToolbarLayout>
+
+        <com.google.android.material.tabs.TabLayout
+            android:id="@+id/tab_layout_main_activity"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:layout_gravity="bottom"
+            app:layout_scrollFlags="scroll|enterAlways"
+            app:tabGravity="fill"
+            app:tabIndicatorHeight="3dp"
+            app:tabRippleColor="?attr/colorControlHighlight"
+            app:tabUnboundedRipple="false" />
+
+    </com.google.android.material.appbar.AppBarLayout>
+
+    <LinearLayout
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        app:layout_behavior="@string/appbar_scrolling_view_behavior" >
+
+        <com.google.android.material.navigationrail.NavigationRailView
+            android:id="@+id/navigation_rail"
+            android:layout_width="80dp"
+            android:layout_height="match_parent"
+            app:headerLayout="@layout/floating_action_button"
+            app:menu="@menu/navigation_rail_menu"
+            app:labelVisibilityMode="unlabeled"
+            app:itemActiveIndicatorStyle="@style/App.Custom.Indicator" />
+
+        <androidx.viewpager2.widget.ViewPager2
+            android:id="@+id/view_pager_main_activity"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content" />
+
+    </LinearLayout>
+
+    <com.google.android.material.floatingactionbutton.FloatingActionButton
+        android:id="@+id/fab_main_activity"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_margin="@dimen/fab_margin"
+        android:visibility="gone" />
+
+</androidx.coordinatorlayout.widget.CoordinatorLayout>

app/src/main/res/layout-sw600dp/app_bar_main.xml

@@ -0,0 +1,76 @@
+<?xml version="1.0" encoding="utf-8"?>
+<androidx.coordinatorlayout.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:id="@+id/coordinator_layout_main_activity"
+    tools:application="ml.docilealligator.infinityforreddit.activities.MainActivity">
+
+    <com.google.android.material.appbar.AppBarLayout
+        android:id="@+id/appbar_layout_main_activity"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:theme="@style/AppTheme.AppBarOverlay">
+
+        <com.google.android.material.appbar.CollapsingToolbarLayout
+            android:id="@+id/collapsing_toolbar_layout_main_activity"
+            android:layout_width="match_parent"
+            android:layout_height="match_parent"
+            app:layout_scrollFlags="scroll|enterAlways"
+            app:titleEnabled="false"
+            app:toolbarId="@+id/toolbar">
+
+            <com.google.android.material.appbar.MaterialToolbar
+                android:id="@+id/toolbar"
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:minHeight="?attr/actionBarSize"
+                app:layout_collapseMode="pin"
+                app:layout_scrollFlags="scroll|enterAlways"
+                app:popupTheme="@style/AppTheme.PopupOverlay" />
+
+        </com.google.android.material.appbar.CollapsingToolbarLayout>
+
+        <com.google.android.material.tabs.TabLayout
+            android:id="@+id/tab_layout_main_activity"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:layout_gravity="bottom"
+            app:layout_scrollFlags="scroll|enterAlways"
+            app:tabGravity="fill"
+            app:tabIndicatorHeight="3dp"
+            app:tabRippleColor="?attr/colorControlHighlight"
+            app:tabUnboundedRipple="false" />
+
+    </com.google.android.material.appbar.AppBarLayout>
+
+    <LinearLayout
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        app:layout_behavior="@string/appbar_scrolling_view_behavior" >
+
+        <com.google.android.material.navigationrail.NavigationRailView
+            android:id="@+id/navigation_rail"
+            android:layout_width="80dp"
+            android:layout_height="match_parent"
+            app:headerLayout="@layout/floating_action_button"
+            app:menu="@menu/navigation_rail_menu"
+            app:labelVisibilityMode="unlabeled"
+            app:itemActiveIndicatorStyle="@style/App.Custom.Indicator" />
+
+        <androidx.viewpager2.widget.ViewPager2
+            android:id="@+id/view_pager_main_activity"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content" />
+
+    </LinearLayout>
+
+    <com.google.android.material.floatingactionbutton.FloatingActionButton
+        android:id="@+id/fab_main_activity"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_margin="@dimen/fab_margin"
+        android:visibility="gone" />
+
+</androidx.coordinatorlayout.widget.CoordinatorLayout>

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

@@ -0,0 +1,4 @@
+<?xml version="1.0" encoding="utf-8"?>
+<com.google.android.material.floatingactionbutton.FloatingActionButton xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="wrap_content"
+    android:layout_height="wrap_content" />

app/src/main/res/menu/navigation_rail_menu.xml

@@ -0,0 +1,15 @@
+<?xml version="1.0" encoding="utf-8"?>
+<menu xmlns:android="http://schemas.android.com/apk/res/android">
+    <item
+        android:id="@+id/navigation_rail_option_1"
+        android:enabled="true"/>
+    <item
+        android:id="@+id/navigation_rail_option_2"
+        android:enabled="true"/>
+    <item
+        android:id="@+id/navigation_rail_option_3"
+        android:enabled="true"/>
+    <item
+        android:id="@+id/navigation_rail_option_4"
+        android:enabled="true"/>
+</menu>

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

@@ -140,6 +140,10 @@
         <item name="colorOnSurface">@color/colorPrimary</item>
         <item name="colorPrimary">@color/primaryTextColor</item>
     </style>
+
+    <style name="App.Custom.Indicator" parent="Widget.Material3.BottomNavigationView.ActiveIndicator">
+        <item name="android:color">#00000000</item>
+    </style>
     
     <style name="FontStyle" />