Android播放视频的三种方式

Uriuri = Uri.parse(Environment.getExternalStorageDirectory().getPath()+"/Test_Movie.m4v"); 
//调用系统自带的播放器 
 Intentintent = new Intent(Intent.ACTION_VIEW); 
 Log.v("URI:::::::::", uri.toString()); 
 intent.setDataAndType(uri, "video/mp4"); 
 startActivity(intent);

Uriuri = Uri.parse(Environment.getExternalStorageDirectory().getPath()+"/Test_Movie.m4v"); 
VideoViewvideoView = (VideoView)this.findViewById(R.id.video_view); 
videoView.setMediaController(new MediaController(this)); 
videoView.setVideoURI(uri); 
videoView.start(); 
videoView.requestFocus();

package demo.camera; 
import java.io.IOException; 
import android.app.Activity; 
import android.media.MediaPlayer; 
import android.media.MediaPlayer.OnCompletionListener; 
import android.media.MediaPlayer.OnErrorListener; 
import android.media.MediaPlayer.OnInfoListener; 
import android.media.MediaPlayer.OnPreparedListener; 
import android.media.MediaPlayer.OnSeekCompleteListener; 
import android.media.MediaPlayer.OnVideoSizeChangedListener; 
import android.os.Bundle; 
import android.os.Environment; 
import android.util.Log; 
import android.view.Display; 
import android.view.SurfaceHolder; 
import android.view.SurfaceView; 
import android.widget.LinearLayout; 
/** 
* 该实例中使用MediaPlayer完成播放，同时界面使用SurfaceView来实现 
* 
* 这里我们实现MediaPlayer中很多状态变化时的监听器 
* 
* 使用Mediaplayer时，也可以使用MediaController类，但是需要实现MediaController.mediaController接口 
* 实现一些控制方法。 
* 
* 然后，设置controller.setMediaPlayer(),setAnchorView(),setEnabled(),show()就可以了，这里不再实现 
* @author Administrator 
* 
*/ 
public class VideoSurfaceDemoextends Activityimplements OnCompletionListener,OnErrorListener,OnInfoListener, 
 OnPreparedListener, OnSeekCompleteListener,OnVideoSizeChangedListener,SurfaceHolder.Callback{ 
 private DisplaycurrDisplay; 
 private SurfaceViewsurfaceView; 
 private SurfaceHolderholder; 
 private MediaPlayerplayer; 
 private int vWidth,vHeight; 
 //private boolean readyToPlay = false; 
   
 public void onCreate(BundlesavedInstanceState){ 
  super.onCreate(savedInstanceState); 
  this.setContentView(R.layout.video_surface); 
     
  surfaceView = (SurfaceView)this.findViewById(R.id.video_surface); 
  //给SurfaceView添加CallBack监听 
  holder = surfaceView.getHolder(); 
  holder.addCallback(this); 
  //为了可以播放视频或者使用Camera预览，我们需要指定其Buffer类型 
  holder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS); 
   
  //下面开始实例化MediaPlayer对象 
  player = new MediaPlayer(); 
  player.setOnCompletionListener(this); 
  player.setOnErrorListener(this); 
  player.setOnInfoListener(this); 
  player.setOnPreparedListener(this); 
  player.setOnSeekCompleteListener(this); 
  player.setOnVideoSizeChangedListener(this); 
  Log.v("Begin:::", "surfaceDestroyed called"); 
  //然后指定需要播放文件的路径，初始化MediaPlayer 
  String dataPath = Environment.getExternalStorageDirectory().getPath()+"/Test_Movie.m4v"; 
  try { 
   player.setDataSource(dataPath); 
   Log.v("Next:::", "surfaceDestroyed called"); 
  } catch (IllegalArgumentException e) { 
   e.printStackTrace(); 
  } catch (IllegalStateException e) { 
   e.printStackTrace(); 
  } catch (IOException e) { 
   e.printStackTrace(); 
  } 
  //然后，我们取得当前Display对象 
  currDisplay = this.getWindowManager().getDefaultDisplay(); 
 } 
  
 @Override 
 public void surfaceChanged(SurfaceHolderarg0, int arg1, int arg2, int arg3) { 
  // 当Surface尺寸等参数改变时触发 
  Log.v("Surface Change:::", "surfaceChanged called"); 
 } 
 @Override 
 public void surfaceCreated(SurfaceHolderholder) { 
  // 当SurfaceView中的Surface被创建的时候被调用 
  //在这里我们指定MediaPlayer在当前的Surface中进行播放 
  player.setDisplay(holder); 
  //在指定了MediaPlayer播放的容器后，我们就可以使用prepare或者prepareAsync来准备播放了 
  player.prepareAsync(); 
   
 } 
 @Override 
 public void surfaceDestroyed(SurfaceHolderholder) { 
   
  Log.v("Surface Destory:::", "surfaceDestroyed called"); 
 } 
 @Override 
 public void onVideoSizeChanged(MediaPlayerarg0, int arg1, int arg2) { 
  // 当video大小改变时触发 
  //这个方法在设置player的source后至少触发一次 
  Log.v("Video Size Change", "onVideoSizeChanged called"); 
   
 } 
 @Override 
 public void onSeekComplete(MediaPlayerarg0) { 
  // seek操作完成时触发 
  Log.v("Seek Completion", "onSeekComplete called"); 
   
 } 
 @Override 
 public void onPrepared(MediaPlayerplayer) { 
  // 当prepare完成后，该方法触发，在这里我们播放视频 
   
  //首先取得video的宽和高 
  vWidth = player.getVideoWidth(); 
  vHeight = player.getVideoHeight(); 
   
  if(vWidth > currDisplay.getWidth() || vHeight > currDisplay.getHeight()){ 
   //如果video的宽或者高超出了当前屏幕的大小，则要进行缩放 
   float wRatio = (float)vWidth/(float)currDisplay.getWidth(); 
   float hRatio = (float)vHeight/(float)currDisplay.getHeight(); 
    
   //选择大的一个进行缩放 
   float ratio = Math.max(wRatio, hRatio); 
    
   vWidth = (int)Math.ceil((float)vWidth/ratio); 
   vHeight = (int)Math.ceil((float)vHeight/ratio); 
    
   //设置surfaceView的布局参数 
   surfaceView.setLayoutParams(new LinearLayout.LayoutParams(vWidth, vHeight)); 
    
   //然后开始播放视频 
    
   player.start(); 
  } 
 } 
 @Override 
 public boolean onInfo(MediaPlayerplayer, int whatInfo, int extra) { 
  // 当一些特定信息出现或者警告时触发 
  switch(whatInfo){ 
  case MediaPlayer.MEDIA_INFO_BAD_INTERLEAVING: 
   break; 
  case MediaPlayer.MEDIA_INFO_METADATA_UPDATE:  
   break; 
  case MediaPlayer.MEDIA_INFO_VIDEO_TRACK_LAGGING: 
   break; 
  case MediaPlayer.MEDIA_INFO_NOT_SEEKABLE: 
   break; 
  } 
  return false; 
 } 
 @Override 
 public boolean onError(MediaPlayerplayer, int whatError, int extra) { 
  Log.v("Play Error:::", "onError called"); 
  switch (whatError) { 
  case MediaPlayer.MEDIA_ERROR_SERVER_DIED: 
   Log.v("Play Error:::", "MEDIA_ERROR_SERVER_DIED"); 
   break; 
  case MediaPlayer.MEDIA_ERROR_UNKNOWN: 
   Log.v("Play Error:::", "MEDIA_ERROR_UNKNOWN"); 
   break; 
  default: 
   break; 
  } 
  return false; 
 } 
 @Override 
 public void onCompletion(MediaPlayerplayer) { 
  // 当MediaPlayer播放完成后触发 
  Log.v("Play Over:::", "onComletion called"); 
  this.finish(); 
 } 
}