android - videoview android的udp流滞后

Question

我正在 videoview 中播放流媒体，但每隔多少秒就会延迟/暂停然后再次播放，我如何才能流畅地播放 android 视频流。这是我的代码：

vv = (VideoView) findViewById(R.id.video);      
MediaController mc = new MediaController(this);
vv.setMediaController(mc);
Uri video = Uri.parse("udp://@239.239.1.1:1234");
vv.setVideoURI(video);
vv.setVisibility(View.VISIBLE);
vv.setOnPreparedListener(new OnPreparedListener(){

 @Override
 public void onPrepared(MediaPlayer arg0) {
  // TODO Auto-generated method stub
 vv.start();
 }          

});