Confirm to exit.

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

@@ -47,6 +47,7 @@ import com.bumptech.glide.request.RequestOptions;
 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.tabs.TabLayout;
 
@@ -70,6 +71,7 @@ import ml.docilealligator.infinityforreddit.AsyncTask.GetCurrentAccountAsyncTask
 import ml.docilealligator.infinityforreddit.AsyncTask.InsertSubscribedThingsAsyncTask;
 import ml.docilealligator.infinityforreddit.AsyncTask.SwitchAccountAsyncTask;
 import ml.docilealligator.infinityforreddit.AsyncTask.SwitchToAnonymousAccountAsyncTask;
+import ml.docilealligator.infinityforreddit.Event.ChangeConfirmToExitEvent;
 import ml.docilealligator.infinityforreddit.Event.ChangeNSFWEvent;
 import ml.docilealligator.infinityforreddit.Event.RecreateActivityEvent;
 import ml.docilealligator.infinityforreddit.Event.SwitchAccountEvent;
@@ -209,6 +211,7 @@ public class MainActivity extends BaseActivity implements SortTypeSelectionCallb
     private Menu mMenu;
     private boolean isInLazyMode = false;
     private boolean showBottomAppBar;
+    private boolean mConfirmToExit;
 
     @Override
     protected void onCreate(Bundle savedInstanceState) {
@@ -309,6 +312,7 @@ public class MainActivity extends BaseActivity implements SortTypeSelectionCallb
         params = (AppBarLayout.LayoutParams) collapsingToolbarLayout.getLayoutParams();
 
         showBottomAppBar = mSharedPreferences.getBoolean(SharedPreferencesUtils.BOTTOM_APP_BAR_KEY, false);
+        mConfirmToExit = mSharedPreferences.getBoolean(SharedPreferencesUtils.CONFIRM_TO_EXIT, false);
 
         if (savedInstanceState != null) {
             mFetchUserInfoSuccess = savedInstanceState.getBoolean(FETCH_USER_INFO_STATE);
@@ -870,7 +874,16 @@ public class MainActivity extends BaseActivity implements SortTypeSelectionCallb
         if (drawer.isDrawerOpen(GravityCompat.START)) {
             drawer.closeDrawer(GravityCompat.START);
         } else {
-            super.onBackPressed();
+            if (mConfirmToExit) {
+                new MaterialAlertDialogBuilder(this, R.style.MaterialAlertDialogTheme)
+                        .setTitle(R.string.exit_app)
+                        .setPositiveButton(R.string.yes, (dialogInterface, i)
+                                -> finish())
+                        .setNegativeButton(R.string.no, null)
+                        .show();
+            } else {
+                super.onBackPressed();
+            }
         }
     }
 
@@ -973,6 +986,11 @@ public class MainActivity extends BaseActivity implements SortTypeSelectionCallb
         recreate();
     }
 
+    @Subscribe
+    public void onChangeConfirmToExitEvent(ChangeConfirmToExitEvent changeConfirmToExitEvent) {
+        mConfirmToExit = changeConfirmToExitEvent.confirmToExit;
+    }
+
     private class SectionsPagerAdapter extends FragmentPagerAdapter {
         private PostFragment frontPagePostFragment;
         private PostFragment popularPostFragment;

app/src/main/java/ml/docilealligator/infinityforreddit/Event/ChangeConfirmToExitEvent.java

@@ -0,0 +1,9 @@
+package ml.docilealligator.infinityforreddit.Event;
+
+public class ChangeConfirmToExitEvent {
+    public boolean confirmToExit;
+
+    public ChangeConfirmToExitEvent(boolean confirmToExit) {
+        this.confirmToExit = confirmToExit;
+    }
+}

app/src/main/java/ml/docilealligator/infinityforreddit/Settings/MainPreferenceFragment.java

@@ -11,6 +11,7 @@ import android.os.Bundle;
 import androidx.annotation.NonNull;
 import androidx.appcompat.app.AppCompatDelegate;
 import androidx.preference.ListPreference;
+import androidx.preference.Preference;
 import androidx.preference.PreferenceFragmentCompat;
 import androidx.preference.SwitchPreference;
 
@@ -46,6 +47,7 @@ public class MainPreferenceFragment extends PreferenceFragmentCompat {
         ((Infinity) activity.getApplication()).getAppComponent().inject(this);
 
         SwitchPreference amoledDarkSwitch = findPreference(SharedPreferencesUtils.AMOLED_DARK_KEY);
+        SwitchPreference confirmToExitSwitch = findPreference(SharedPreferencesUtils.CONFIRM_TO_EXIT);
         SwitchPreference nsfwSwitch = findPreference(SharedPreferencesUtils.NSFW_KEY);
         SwitchPreference blurNSFWSwitch = findPreference(SharedPreferencesUtils.BLUR_NSFW_KEY);
         SwitchPreference blurSpoilerSwitch = findPreference(SharedPreferencesUtils.BLUR_SPOILER_KEY);
@@ -61,6 +63,16 @@ public class MainPreferenceFragment extends PreferenceFragmentCompat {
             });
         }
 
+        if (confirmToExitSwitch != null) {
+            confirmToExitSwitch.setOnPreferenceChangeListener(new Preference.OnPreferenceChangeListener() {
+                @Override
+                public boolean onPreferenceChange(Preference preference, Object newValue) {
+                    EventBus.getDefault().post(new RecreateActivityEvent());
+                    return true;
+                }
+            });
+        }
+
         if (nsfwSwitch != null) {
             nsfwSwitch.setOnPreferenceChangeListener((preference, newValue) -> {
                 EventBus.getDefault().post(new ChangeNSFWEvent((Boolean) newValue));

app/src/main/java/ml/docilealligator/infinityforreddit/Utils/SharedPreferencesUtils.java

@@ -72,4 +72,5 @@ public class SharedPreferencesUtils {
     public static final String LOCK_JUMP_TO_NEXT_TOP_LEVEL_COMMENT_BUTTON = "lock_jump_to_next_top_level_comment_button";
     public static final String SWIPE_UP_TO_HIDE_JUMP_TO_NEXT_TOP_LEVEL_COMMENT_BUTTON = "swipe_up_to_hide_jump_to_next_top_level_comments_button";
     public static final String SHOW_TOP_LEVEL_COMMENTS_FIRST = "show_top_level_comments_first";
+    public static final String CONFIRM_TO_EXIT = "confirm_to_exit";
 }

app/src/main/res/drawable-night/ic_exit_24dp.xml

@@ -0,0 +1,9 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="24dp"
+    android:height="24dp"
+    android:viewportWidth="24"
+    android:viewportHeight="24">
+  <path
+      android:fillColor="#FFFFFFFF"
+      android:pathData="M10.09,15.59L11.5,17l5,-5 -5,-5 -1.41,1.41L12.67,11H3v2h9.67l-2.58,2.59zM19,3H5c-1.11,0 -2,0.9 -2,2v4h2V5h14v14H5v-4H3v4c0,1.1 0.89,2 2,2h14c1.1,0 2,-0.9 2,-2V5c0,-1.1 -0.9,-2 -2,-2z"/>
+</vector>

app/src/main/res/drawable/ic_exit_24dp.xml

@@ -0,0 +1,9 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="24dp"
+    android:height="24dp"
+    android:viewportWidth="24"
+    android:viewportHeight="24">
+  <path
+      android:fillColor="#FF000000"
+      android:pathData="M10.09,15.59L11.5,17l5,-5 -5,-5 -1.41,1.41L12.67,11H3v2h9.67l-2.58,2.59zM19,3H5c-1.11,0 -2,0.9 -2,2v4h2V5h14v14H5v-4H3v4c0,1.1 0.89,2 2,2h14c1.1,0 2,-0.9 2,-2V5c0,-1.1 -0.9,-2 -2,-2z"/>
+</vector>

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

@@ -302,6 +302,7 @@
     <string name="settings_volume_keys_navigate_comments_title">Use Volume Keys to Navigate Comments in Posts</string>
     <string name="settings_volume_keys_navigate_posts_title">Use Volume Keys to Navigate Posts</string>
     <string name="settings_mute_video_title">Mute Video</string>
+    <string name="settings_confirm_to_exit">Confirm to Exit</string>
     <string name="settings_show_top_level_comments_first_title">Show Top-level Comments First</string>
     <string name="settings_show_elapsed_time">Show Elapsed Time in Posts and Comments</string>
     <string name="settings_default_post_layout">Default Post Layout</string>
@@ -420,4 +421,6 @@
 
     <string name="save_comment">Save comment</string>
     <string name="unsave_comment">Unsave comment</string>
+
+    <string name="exit_app">Exit?</string>
 </resources>

app/src/main/res/xml/interface_preference.xml

@@ -41,4 +41,9 @@
         app:key="show_divider_in_compact_layout"
         app:title="@string/settings_show_divider_in_compact_layout" />
 
+    <SwitchPreference
+        app:defaultValue="false"
+        app:key="show_top_level_comments_first"
+        app:title="@string/settings_show_top_level_comments_first_title" />
+
 </PreferenceScreen>

app/src/main/res/xml/main_preferences.xml

@@ -44,8 +44,9 @@
 
     <SwitchPreference
         app:defaultValue="false"
-        app:key="show_top_level_comments_first"
+        app:key="confirm_to_exit"
-        app:title="@string/settings_show_top_level_comments_first_title" />
+        app:icon="@drawable/ic_exit_24dp"
+        app:title="@string/settings_confirm_to_exit" />
 
     <ListPreference
         app:defaultValue="2.5"