小编cut*_*ace的帖子

下面的代码是带有使用媒体会话的控件的音乐通知播放器。每当我单击通知中的控件时，它就会崩溃并出现上述错误。请参阅下面的代码，如果我错了，请纠正我。在下面的代码中，我使用媒体会话和广播接收器来构建通知。“track”是我所有歌曲数据的模型类。

   try {
                if (track.getImage() == null) {
                    track.setImage(BitmapFactory.decodeResource(context.getResources(),
                            R.mipmap.ic_launcher));
                }
    
    
                NotificationManagerCompat notificationManagerCompat = NotificationManagerCompat.from(context);
                MediaSessionCompat mediaSessionCompat = new MediaSessionCompat(context, "tag");
                mediaSessionCompat.setMetadata(
                        new MediaMetadataCompat.Builder()
                                .putString(MediaMetadata.METADATA_KEY_TITLE, track.getTitle())
                                .putString(MediaMetadata.METADATA_KEY_ARTIST, track.getArtist())
                                .putBitmap(MediaMetadata.METADATA_KEY_ALBUM_ART, track.getImage())
                                .putString(MediaMetadata.METADATA_KEY_ALBUM, track.getAlbum())
                                .build()
                );
                mediaSessionCompat.setFlags(
                        MediaSessionCompat.FLAG_HANDLES_MEDIA_BUTTONS |
                                MediaSessionCompat.FLAG_HANDLES_TRANSPORT_CONTROLS);
    
                PlaybackStateCompat.Builder stateBuilder = new PlaybackStateCompat.Builder();
    
                stateBuilder.setActiveQueueItemId(MediaSession.QueueItem.UNKNOWN_ID);
    
                long actions = PlaybackStateCompat.ACTION_PLAY_PAUSE | PlaybackStateCompat.ACTION_STOP | PlaybackStateCompat.ACTION_SKIP_TO_NEXT | PlaybackStateCompat.ACTION_SKIP_TO_PREVIOUS;
                stateBuilder.setActions(actions);
                if (isPlaying) {
                    stateBuilder.setState(PlaybackStateCompat.STATE_PLAYING, 0, 1.0f);
                    mediaSessionCompat.setActive(true);
    
                } else {
                    stateBuilder.setState(PlaybackStateCompat.STATE_PAUSED, 0, 1.0f);
                    mediaSessionCompat.setActive(true);
    
    
                }
                mediaSessionCompat.setPlaybackState(stateBuilder.build());
                Bitmap icon = track.getImage();
    
    
                PendingIntent pendingIntentPrevious;
                int drw_previous;
    
    // …