class MediaControllerAdapter extends PlayerAdapter {

    @Override
    public boolean isPlaying() {
        if (mController.getPlaybackState() == null) {
            return false;
        }
        return mController.getPlaybackState().getState()
                == PlaybackStateCompat.STATE_PLAYING
                || mController.getPlaybackState().getState()
                == PlaybackStateCompat.STATE_FAST_FORWARDING
                || mController.getPlaybackState().getState() == PlaybackStateCompat.STATE_REWINDING;
    }

    public  MediaControllerAdapter(MediaControllerCompat controller);

}