mute/unmute text change in action bar

app/src/main/java/org/schabi/newpipe/player/ServicePlayerActivity.java

@@ -694,6 +694,12 @@ public abstract class ServicePlayerActivity extends AppCompatActivity
     private void onMaybeMuteChanged() {
         if (menu != null && player != null) {
             MenuItem item = menu.findItem(R.id.action_mute);
+
+            //Change the mute-button item in ActionBar
+            //1) Text change:
+            item.setTitle(player.isMuted() ? R.string.unmute : R.string.mute);
+
+            //2) Icon change accordingly to current App Theme
             TypedArray a = getTheme().obtainStyledAttributes(R.style.Theme_AppCompat, new int[]{R.attr.volume_off});
             int attributeResourceId = a.getResourceId(0, 0);
             Drawable drawableMuted = getResources().getDrawable(attributeResourceId);

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

@@ -449,6 +449,7 @@
     <string name="playlist_name_input">Name</string>
     <string name="append_playlist">Add To Playlist</string>
     <string name="mute">Mute</string>
+    <string name="unmute">Unmute</string>
     <string name="set_as_playlist_thumbnail">Set as Playlist Thumbnail</string>
     <string name="bookmark_playlist">Bookmark Playlist</string>
     <string name="unbookmark_playlist">Remove Bookmark</string>