使用SurfaceView播放视频,其实很简单,但是经常会碰见有声音没图像的问题.

其实使用SurfaceView播放视频只需要主要下面几个地方就可以了

1. surfaceChanged也就是Suface是否创建成功

2. onPrepared 也就是MideoPlayer是否加载并准备完成

3. surfaceHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS); 类型必须是SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS

java代码：

  1 package VideoTest.Test;
  2 
  3  import java.io.FileDescriptor;
  4 
  5 import android.app.Activity;
  6 import android.content.res.AssetFileDescriptor;
  7 import android.media.AudioManager;
  8 import android.media.MediaPlayer;
  9 import android.media.MediaPlayer.OnBufferingUpdateListener;
 10 import android.media.MediaPlayer.OnCompletionListener;
 11 import android.media.MediaPlayer.OnPreparedListener;
 12 import android.os.Bundle;
 13 import android.view.SurfaceHolder;
 14 import android.view.SurfaceView;
 15 
 16 
 17 public class VideoTest extends Activity implements SurfaceHolder.Callback, 
 18     OnBufferingUpdateListener, OnCompletionListener, OnPreparedListener{
 19     
 20     private SurfaceView surfaceView;
 21     private SurfaceHolder surfaceHolder;
 22     private MediaPlayer mediaPlayer;
 23     
 24     @Override
 25     public void onCreate(Bundle savedInstanceState) {
 26         super.onCreate(savedInstanceState);
 27         
 28         this.surfaceView = new SurfaceView(this);
 29         this.surfaceHolder = this.surfaceView.getHolder();
 30         this.surfaceHolder.addCallback(this);
 31         
 32         //类型必须设置成SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS
 33         this.surfaceHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);    
 34         setContentView(this.surfaceView);
 35     }
 36     
 37     @Override
 38     public void onDestroy() {
 39         super.onDestroy();
 40         if (this.mediaPlayer != null) {
 41             this.mediaPlayer.release();
 42             this.mediaPlayer = null;
 43         }
 44     }
 45     
 46     public void PlayVideo(){
 47         
 48         try {
 49             //视频文件放在 assert中
 50             AssetFileDescriptor aFD = this.getAssets().openFd("welcome.3gp");
 51             FileDescriptor fileDescriptor = aFD.getFileDescriptor();
 52             this.mediaPlayer = new MediaPlayer();
 53             this.mediaPlayer.setDataSource(fileDescriptor, aFD.getStartOffset(), aFD.getLength());
 54             aFD.close();    
 55             
 56             //视频放在SDCard中
 57             //File sdFile = Environment.getExternalStorageDirectory();
 58             //this.mediaPlayer = new MediaPlayer();
 59             //this.mediaPlayer.setDataSource(sdFile.getAbsoluteFile() + File.separator + "welcome.3gp");
 60             
 61             //视频放在res中
 62             //this.mediaPlayer = MediaPlayer.create(this, R.raw.welcome);
 63             
 64             //网上的视频,没有测试
 65             //this.mediaPlayer
 66             //    .setDataSource("http://xy2.163.com/download/down/wukong.mp3");
 67             
 68             this.mediaPlayer.setDisplay(this.surfaceHolder);
 69             this.mediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);
 70             //准备完成后才可以播放,另外如果文件特别大或者从网上获得的资源
 71             //会在这里等待时间过长,造成堵塞,这样的话就得用
 72             //this.mediaPlayer.prepareAsync(),然后监听是否准备完毕在开始
 73             
 74             this.mediaPlayer.prepare();            
 75             this.mediaPlayer.start();                
 76                 
 77         } catch (Exception e) {
 78             // TODO: handle exception
 79         }
 80     }
 81     
 82     @Override
 83     public void surfaceChanged(SurfaceHolder holder, int format, int width,
 84             int height) {
 85         
 86     }
 87 
 88     @Override
 89     public void surfaceCreated(SurfaceHolder holder) {
 90         //SurfaceCreated 创建成功才可以播放视频
 91         PlayVideo();
 92     }
 93 
 94     @Override
 95     public void surfaceDestroyed(SurfaceHolder holder) {
 96         
 97     }
 98     
 99     //@Override
100     public void onBufferingUpdate(MediaPlayer mp, int percent) {
101         // TODO Auto-generated method stub
102 
103     }
104 
105     //@Override
106     public void onCompletion(MediaPlayer mp) {
107         // TODO Auto-generated method stub
108 
109     }
110 
111     //@Override
112     public void onPrepared(MediaPlayer mp) {
113         //MediaPlayer加载准备完毕才能开始播放
114         //mp.start();
115     }
116     
117 }