MediaStyle通知未响应RemoteControl事件 .

我们正在将正在进行的播放通知迁移到Lollipop中引入的MediaStyle通知 . RemoteControlClient似乎已被弃用，MediaStyle通知不处理媒体按钮事件（例如通过耳机远程暂停/播放） .

有没有人得到这个工作？ MediaSessionCallback中没有任何事件被调用 .

以下是媒体会话的初始化方式

mSession = new MediaSessionCompat(this, TAG);
    mSession.setCallback(new MediaSessionCallback());
    mSession.setFlags(MediaSessionCompat.FLAG_HANDLES_MEDIA_BUTTONS | MediaSessionCompat.FLAG_HANDLES_TRANSPORT_CONTROLS);
    mSession.setPlaybackToLocal(AudioManager.STREAM_MUSIC);
    mSession.setActive(true);

以下是设置元数据的方式

MediaMetadataCompat.Builder metadataBuilder = new MediaMetadataCompat.Builder();
    metadataBuilder
            .putLong(MediaMetadata.METADATA_KEY_DURATION, clip.getDuration())
            .putString(MediaMetadata.METADATA_KEY_MEDIA_ID, clip.getClipId())
            .putString(MediaMetadata.METADATA_KEY_TITLE, clip.getTitle())
            .putString(MediaMetadata.METADATA_KEY_ARTIST, clip.getSourceName())
            .putString(MediaMetadata.METADATA_KEY_ALBUM_ART_URI, clip.getImageUrl())
            .putLong(MediaMetadata.METADATA_KEY_DURATION, clip.getDuration());
    mSession.setMetadata(metadataBuilder.build());

最后，通知代码：

MediaSession mediaSession = (MediaSession) session.getMediaSession();
        Notification.Builder builder =
                new Notification.Builder(c)
                        .setDefaults(0)
                        .setSmallIcon(R.drawable.ic_notif)
                        .setVisibility(NotificationCompat.VISIBILITY_PUBLIC)
                        .setContentTitle(clip.getTitle())
                        .setContentText(clip.getSourceName())
                        .setProgress((int)duration, (int)progress, false)
                        .setWhen(0)
                        .setContentIntent(pendingIntent);

        if (playing) {
            builder.addAction(R.drawable.ic_media_pause, c.getString(R.string.media_pause),
                    getPendingIntentForKeyCode(app.getApplicationContext(), KeyEvent.KEYCODE_MEDIA_PAUSE));
        } else {
            builder.addAction(R.drawable.ic_media_play, c.getString(R.string.media_play),
                    getPendingIntentForKeyCode(app.getApplicationContext(), KeyEvent.KEYCODE_MEDIA_PLAY));
        }
        builder.addAction(R.drawable.ic_media_next, c.getString(R.string.media_next),
                    getPendingIntentForKeyCode(app.getApplicationContext(), KeyEvent.KEYCODE_MEDIA_NEXT));

        builder.setStyle(new Notification.MediaStyle()
                .setMediaSession(mediaSession.getSessionToken())
                .setShowActionsInCompactView(new int[] {1, 2})
                )
        );

        notification = builder.build();