Implement Ignore hardware media button events option

app/src/main/java/org/schabi/newpipe/player/mediasession/MediaSessionPlayerUi.java

@@ -44,6 +44,15 @@ public class MediaSessionPlayerUi extends PlayerUi {
         sessionConnector = new MediaSessionConnector(mediaSession);
         sessionConnector.setQueueNavigator(new PlayQueueNavigator(mediaSession, player));
         sessionConnector.setPlayer(getForwardingPlayer());
+        sessionConnector.setMediaButtonEventHandler((p, i) -> {
+            // It seems like events from the Media Control UI
+            // in the notification area don't go through this function,
+            // so it's safe to just ignore all events in case we want to
+            // ignore the hardware media buttons.
+            // Returning true stops all further event processing of the system
+            return player.getPrefs().getBoolean(
+                    context.getString(R.string.ignore_hardware_media_buttons_key), false);
+        });
 
         sessionConnector.setMetadataDeduplicationEnabled(true);
         sessionConnector.setMediaMetadataProvider(exoPlayer -> buildMediaMetadata());
@@ -53,6 +62,7 @@ public class MediaSessionPlayerUi extends PlayerUi {
     public void destroyPlayer() {
         super.destroyPlayer();
         if (sessionConnector != null) {
+            sessionConnector.setMediaButtonEventHandler(null);
             sessionConnector.setPlayer(null);
             sessionConnector.setQueueNavigator(null);
             sessionConnector = null;

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

@@ -25,6 +25,7 @@
     <string name="screen_brightness_key">screen_brightness_key</string>
     <string name="screen_brightness_timestamp_key">screen_brightness_timestamp_key</string>
     <string name="clear_queue_confirmation_key">clear_queue_confirmation_key</string>
+    <string name="ignore_hardware_media_buttons_key">ignore_hardware_media_buttons_key</string>
 
     <string name="popup_saved_width_key">popup_saved_width</string>
     <string name="popup_saved_x_key">popup_saved_x</string>

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

@@ -83,6 +83,8 @@
     <string name="clear_queue_confirmation_title">Ask for confirmation before clearing a queue</string>
     <string name="clear_queue_confirmation_summary">Switching from one player to another may replace your queue</string>
     <string name="clear_queue_confirmation_description">The active player queue will be replaced</string>
+    <string name="ignore_hardware_media_buttons_title">Ignore hardware media button events</string>
+    <string name="ignore_hardware_media_buttons_summary">Useful, for instance, if you are using a headset with broken physical buttons</string>
     <string name="download_thumbnail_title">Load thumbnails</string>
     <string name="download_thumbnail_summary">Turn off to prevent loading thumbnails, saving data and memory usage. Changes clear both in-memory and on-disk image cache</string>
     <string name="show_comments_title">Show comments</string>

app/src/main/res/xml/video_audio_settings.xml

@@ -224,5 +224,12 @@
             app:singleLineTitle="false"
             app:iconSpaceReserved="false" />
 
+        <SwitchPreferenceCompat
+            android:defaultValue="false"
+            android:key="@string/ignore_hardware_media_buttons_key"
+            android:summary="@string/ignore_hardware_media_buttons_summary"
+            android:title="@string/ignore_hardware_media_buttons_title"
+            app:singleLineTitle="false"
+            app:iconSpaceReserved="false" />
     </PreferenceCategory>
 </PreferenceScreen>