播放歌曲時，MediaController播放按鈕不會更新

Question

我正在嘗試使用mediacontroller播放音頻。 我能夠讓音頻工作但是當歌曲開始播放時我的mediacontroller上的播放按鈕不會更新。 如果按下mediacontroller上的播放按鈕，它會暫停歌曲並尋找進度條。 然后，如果我按暫停，它會再次播放該歌曲。 我在打電話

mp.start() 

這不會更新播放按鈕。 當我打電話開始時，如何讓按鈕更改為暫停按鈕？

public class QuickMusicPlayer implements MediaController.MediaPlayerControl {

private final MediaPlayer mMediaPlayer;
private final MediaController mMediaController;
private Activity mActivity;

public QuickMusicPlayer(View anchorView, Activity activity) {
    mActivity = activity;
    mMediaPlayer = new MediaPlayer();
    mMediaController = new MediaController(activity);
    mMediaController.setMediaPlayer(this);
    mMediaController.setAnchorView(anchorView);
    mMediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);
    mMediaPlayer.setOnPreparedListener(new MediaPlayer.OnPreparedListener() {
        @Override
        public void onPrepared(MediaPlayer mp) {
            mp.start();
        }
    });
}

public void setUrl(String url) {
    mMediaPlayer.reset();
    if (TextUtils.isEmpty(url)) {
        ViewUtil.showCroutonAlert(mActivity, R.string.cant_play_music);
    } else {
        try {

            mMediaPlayer.setDataSource(url);
            mMediaPlayer.prepareAsync();
            mMediaController.setEnabled(true);
            mMediaController.show(0);
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

@Override
public void start() {
    mMediaPlayer.start();
}

@Override
public void pause() {
    mMediaPlayer.pause();
}

@Override
public int getDuration() {
    return mMediaPlayer.getDuration();
}

@Override
public int getCurrentPosition() {
    return mMediaPlayer.getCurrentPosition();
}

@Override
public void seekTo(int pos) {
    mMediaPlayer.seekTo(pos);
}

@Override
public boolean isPlaying() {
    return mMediaPlayer.isPlaying();
}

@Override
public int getBufferPercentage() {
    return 0;
}

@Override
public boolean canPause() {
    return true;
}

@Override
public boolean canSeekBackward() {
    return true;
}

@Override
public boolean canSeekForward() {
    return true;
}

@Override
public int getAudioSessionId() {
    return 0;
}

}

Answer 1

弄清楚了。 我需要在開始更新按鈕后再次調用show

mMediaPlayer.setOnPreparedListener(new MediaPlayer.OnPreparedListener() {
    @Override
    public void onPrepared(MediaPlayer mp) {
        mp.start();
        mMediaController.show(0);
    }
});