MediaPlayer SurfaceView播放黑屏

SurfaceView 在播放器切到后台播放时，SurfaceView的SurfaceHolder会destroy掉,为了避免切回到前台只有声音没有画面的情况，在surfaceChanged的回调函数里需要加上mMediaPlayer.setDisplay(holder)，在 destroy的时候pause，在create的时候 start，如下

@Override

public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {

mMediaPlayer.setDisplay(holder);

  Log.e("SurfaceHolder","change " +"width: "+width +" height: "+height);

}

@Override

public void surfaceCreated(SurfaceHolder holder) {

      mMediaPlayer.start();

}

@Override

public void surfaceDestroyed(SurfaceHolder holder) {

if (mMediaPlayer !=null &&mMediaPlayer.isPlaying()) {

      mMediaPlayer.pause();

      Log.e("SurfaceHolder","destory");

  }

}