Added reset button but working as intended for theme.

Author: vincetzr

app/src/main/java/org/schabi/newpipe/settings/DebugSettingsFragment.java

@@ -10,7 +10,9 @@
 import org.schabi.newpipe.error.ErrorUtil;
 import org.schabi.newpipe.error.UserAction;
 import org.schabi.newpipe.local.feed.notifications.NotificationWorker;
+import org.schabi.newpipe.util.Constants;
 import org.schabi.newpipe.util.PicassoHelper;
+import org.schabi.newpipe.util.ThemeHelper;
 
 import java.util.Optional;
 
@@ -35,6 +37,8 @@ public void onCreatePreferences(final Bundle savedInstanceState, final String ro
                 findPreference(getString(R.string.show_error_snackbar_key));
         final Preference createErrorNotificationPreference =
                 findPreference(getString(R.string.create_error_notification_key));
+        final Preference resetSettings =
+                findPreference(getString(R.string.reset_settings));
 
         assert allowHeapDumpingPreference != null;
         assert showMemoryLeaksPreference != null;
@@ -86,6 +90,15 @@ public void onCreatePreferences(final Bundle savedInstanceState, final String ro
                     new ErrorInfo(new RuntimeException(DUMMY), UserAction.UI_ERROR, DUMMY));
             return true;
         });
+
+        // reset appearance to light theme
+        resetSettings.setOnPreferenceClickListener(preference -> {
+            defaultPreferences.edit().putBoolean(Constants.KEY_THEME_CHANGE, true).apply();
+            defaultPreferences.edit().putString(getString(R.string.theme_key),
+                    getString(R.string.light_theme_key)).apply();
+            ThemeHelper.setDayNightMode(requireContext(), "light_theme");
+            return true;
+        });
     }
 
     /**

app/src/main/java/org/schabi/newpipe/settings/ResetSettingsFragment.java

@@ -30,7 +30,6 @@ public final class SettingsResourceRegistry {
 
     private SettingsResourceRegistry() {
         add(MainSettingsFragment.class, R.xml.main_settings).setSearchable(false);
-
         add(AppearanceSettingsFragment.class, R.xml.appearance_settings);
         add(ContentSettingsFragment.class, R.xml.content_settings);
         add(DebugSettingsFragment.class, R.xml.debug_settings).setSearchable(false);
@@ -41,7 +40,6 @@ private SettingsResourceRegistry() {
         add(UpdateSettingsFragment.class, R.xml.update_settings);
         add(VideoAudioSettingsFragment.class, R.xml.video_audio_settings);
         add(ExoPlayerSettingsFragment.class, R.xml.exoplayer_settings);
-        add(ResetSettingsFragment.class, R.xml.main_settings);
     }
 
     private SettingRegistryEntry add(

app/src/main/java/org/schabi/newpipe/settings/SettingsResourceRegistry.java

@@ -223,7 +223,7 @@
     <string name="prefer_descriptive_audio_key">prefer_descriptive_audio</string>
     <string name="last_resize_mode">last_resize_mode</string>
     <!-- RESET ONLY -->
-    <string name="reset_pref_screen_key">reset_pref_screen_key</string>
+    <string name="reset_settings">reset_settings</string>
 
     <!-- DEBUG ONLY -->
     <string name="debug_pref_screen_key">debug_pref_screen_key</string>

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

@@ -71,4 +71,9 @@
         android:title="@string/create_error_notification"
         app:singleLineTitle="false"
         app:iconSpaceReserved="false" />
+    <Preference
+        android:icon="@drawable/ic_replay"
+        android:key="@string/reset_settings"
+        android:title="@string/settings_category_reset_title"
+        app:iconSpaceReserved="false" />
 </PreferenceScreen>

app/src/main/res/xml/debug_settings.xml

@@ -53,12 +53,4 @@
         android:key="@string/debug_pref_screen_key"
         android:title="@string/settings_category_debug_title"
         app:iconSpaceReserved="false" />
-    <PreferenceScreen
-        android:fragment="org.schabi.newpipe.settings.ResetSettingsFragment"
-        android:layout_width="wrap_content"
-        android:layout_height="wrap_content"
-        android:icon="@drawable/ic_replay"
-        android:key="@string/reset_pref_screen_key"
-        android:title="@string/settings_category_reset_title"
-        app:iconSpaceReserved="false" />
 </PreferenceScreen>