你可以参考我的写法，注意点就是你自定义的MyCallBack()里面要回调，也就是我写的SurfaceCallBack()里面的SurfaceCreated()函数要实现你写的setOnPreparedListener()的监听

public class Video implements MediaPlayer.OnCompletionListener,MediaPlayer.OnPreparedListener,MediaPlayer.OnErrorListener,MediaPlayer.OnBufferingUpdateListener,VideoClickListener{private Context context;

private SurfaceView surfaceView;

private SurfaceHolder surfaceHolder;

private MediaPlayer mediaPlayer;

private ProgressBar progressBar;

private SeekBar seekBar;

private VerticalSeekBar seekBar_sound;

private ImageView pause,full_screen,silent;

private TextView textView;

private boolean seekBarAutoFlag;

private String videoTimeString;

//判断值

private boolean isFullScreen=false;  //是否全屏

private boolean isPause=false; //是否暂停

private boolean isSilent=false;//是否静音

private int screenWidth;  //获取到设备的宽高

private int screenHeight;

@Override

public MediaPlayer getMediaPlayer() {

return mediaPlayer;

}

@Override

public SurfaceView getSurfaveView() {

return surfaceView;

}

@Override

public Thread getThread() {

return thread;

}

public Video(Context context, MediaPlayer mediaPlayereekBar, SurfaceView surfaceView, ProgressBar progressBar, SeekBar seekBar, TextView textView, ImageView pause, ImageView full_screen) {

this.context = context;

this.mediaPlayer=mediaPlayereekBar;

this.surfaceView=surfaceView;

this.progressBar=progressBar;

this.seekBar=seekBar;

this.textView=textView;

this.pause=pause;

this.full_screen=full_screen;

init();

}

/**

* 初始化控件

*/

public void init(){

// 设置surfaceHolder

surfaceHolder = surfaceView.getHolder();

// 设置Holder类型,该类型表示surfaceView自己不管理缓存区,虽然提示过时，但最好还是要设置

surfaceHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);

// 设置surface回调

surfaceHolder.addCallback(new SurfaceCallback());

//   mAudioManager= (AudioManager) context.getSystemService(AUDIO_SERVICE);

//获取屏幕的宽高

WindowManager wm = (WindowManager) context

.getSystemService(Context.WINDOW_SERVICE);

screenWidth = wm.getDefaultDisplay().getWidth();

screenHeight = wm.getDefaultDisplay().getHeight();

}

/**

* 回调 对SurfaceView的生命周期的实现。

*/

private class SurfaceCallback implements SurfaceHolder.Callback {

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

// SurfaceView的大小改变

mediaPlayer.setDisplay(surfaceHolder);

}

public void surfaceCreated(SurfaceHolder holder) {

// surfaceView被创建

// 设置播放资源

playVideo();

}

public void surfaceDestroyed(SurfaceHolder holder) {

// surfaceView销毁

// 如果MediaPlayer没被销毁，则销毁mediaPlayer

if (null != mediaPlayer) {

mediaPlayer.release();

mediaPlayer = null;

}

}

}

/**

* 播放视频

*/

public void playVideo() {

// 初始化MediaPlayer

mediaPlayer = new MediaPlayer();

// 重置mediaPaly,建议在初始滑mediaplay立即调用。

mediaPlayer.reset();

// 设置声音效果

mediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);

// 设置播放完成监听

mediaPlayer.setOnCompletionListener(Video.this);

// 设置媒体加载完成以后回调函数。

mediaPlayer.setOnPreparedListener(this);

// 错误监听回调函数

mediaPlayer.setOnErrorListener(this);

// 设置缓存变化监听

mediaPlayer.setOnBufferingUpdateListener(this);

File file = new File(Environment.getExternalStorageDirectory(), "震撼宇宙10秒倒计时.mp4");

String a=file.getPath();

Uri uri = Uri

.parse("http://video.eastday.com/a/180320180216447158758.html?qid=01360");

try {

// mediaPlayer.reset();

//mediaPlayer.setDataSource(media.this, uri);

mediaPlayer.setDataSource(a);

// 设置异步加载视频，包括两种方式 prepare()同步，prepareAsync()异步

mediaPlayer.prepareAsync();

} catch (IOException e) {

e.printStackTrace();

}

}