E/MediaPlayer: Should have subtitle controller already set

Posted 2020-06-09

 

原文链接：http://stackoverflow.com/questions/20087804/should-have-subtitle-controller-already-set-mediaplayer-error-android/20149754#20149754

 1 static MediaPlayer getMediaPlayer(Context context){
 2 
 3     MediaPlayer mediaplayer = new MediaPlayer();
 4 
 5     if (android.os.Build.VERSION.SDK_INT < android.os.Build.VERSION_CODES.KITKAT) {
 6         return mediaplayer;
 7     }
 8 
 9     try {
10         Class<?> cMediaTimeProvider = Class.forName( "android.media.MediaTimeProvider" );
11         Class<?> cSubtitleController = Class.forName( "android.media.SubtitleController" );
12         Class<?> iSubtitleControllerAnchor = Class.forName( "android.media.SubtitleController$Anchor" );
13         Class<?> iSubtitleControllerListener = Class.forName( "android.media.SubtitleController$Listener" );
14 
15         Constructor constructor = cSubtitleController.getConstructor(new Class[]{Context.class, cMediaTimeProvider, iSubtitleControllerListener});
16 
17         Object subtitleInstance = constructor.newInstance(context, null, null);
18 
19         Field f = cSubtitleController.getDeclaredField("mHandler");
20 
21         f.setAccessible(true);
22         try {
23             f.set(subtitleInstance, new Handler());
24         }
25         catch (IllegalAccessException e) {return mediaplayer;}
26         finally {
27             f.setAccessible(false);
28         }
29 
30         Method setsubtitleanchor = mediaplayer.getClass().getMethod("setSubtitleAnchor", cSubtitleController, iSubtitleControllerAnchor);
31 
32         setsubtitleanchor.invoke(mediaplayer, subtitleInstance, null);
33         //Log.e("", "subtitle is setted :p");
34     } catch (Exception e) {}
35 
36     return mediaplayer;
37 }

 

　　This code is trying to do the following from the hidden API

1 SubtitleController sc = new SubtitleController(context, null, null);
2 sc.mHandler = new Handler();
3 mediaplayer.setSubtitleAnchor(sc, null)