Android三種播放視頻的方式

在Android中，我們有三種方式來實現視頻的播放：
1、使用其自帶的播放器。指定Action為ACTION_VIEW,Data為Uri，Type為其MIME類型。
2、使用VideoView來播放。在布局文件中使用VideoView結合MediaController來實現對其控制。
3、使用MediaPlayer類和SurfaceView來實現，這種方式很靈活。

1、調用其自帶的播放器：

Uri uri = Uri.parse(Environment.getExternalStorageDirectory().getPath()+"/Test_Movie.m4v");     
//調用系統自帶的播放器
Intent intent = new Intent(Intent.ACTION_VIEW);
Log.v("URI:::::::::", uri.toString());
intent.setDataAndType(uri, "video/mp4");  
startActivity(intent);

2、使用VideoView來實現：

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

3、使用MediaPlayer：

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;   
 
/**  
 * 該實例中使用MediaPlayer完成播放，同時界面使用SurfaceView來實現  
 *   
 * 這里我們實現MediaPlayer中很多狀態變化時的監聽器  
 *   
 * 使用Mediaplayer時，也可以使用MediaController類，但是需要實現MediaController.mediaController接口  
 * 實現一些控制方法。  
 *   
 * 然后，設置controller.setMediaPlayer(),setAnchorView(),setEnabled(),show()就可以了，這里不再實現  
 * @author Administrator  
 *  
 */    
public class VideoSurfaceDemo extends Activity implements OnCompletionListener,OnErrorListener,OnInfoListener, OnPreparedListener, OnSeekCompleteListener,OnVideoSizeChangedListener,SurfaceHolder.Callback{    
    private Display currDisplay;    
    private SurfaceView surfaceView;    
    private SurfaceHolder holder;    
    private MediaPlayer player;    
    private int vWidth,vHeight;    
    //private boolean readyToPlay = false;     
            
    public void onCreate(Bundle savedInstanceState){    
        super.onCreate(savedInstanceState);    
        this.setContentView(R.layout.video_surface);    
                    
        surfaceView = (SurfaceView)this.findViewById(R.id.video_surface);    
        //給SurfaceView添加CallBack監聽     
        holder = surfaceView.getHolder();    
        holder.addCallback(this);    
        //為了可以播放視頻或者使用Camera預覽，我們需要指定其Buffer類型     
        holder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);    
            
        //下面開始實例化MediaPlayer對象     
        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徑，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，我們取得當前Display對象     
        currDisplay = this.getWindowManager().getDefaultDisplay();    
    }    
        
    @Override    
    public void surfaceChanged(SurfaceHolder arg0, int arg1, int arg2, int arg3) {    
        // 當Surface尺寸等參數改變時觸發     
        Log.v("Surface Change:::", "surfaceChanged called");    
    }
    
    @Override    
    public void surfaceCreated(SurfaceHolder holder) {    
        // 當SurfaceView中的Surface被創建的時候被調用     
        //在這里我們指定MediaPlayer在當前的Surface中進行播放     
        player.setDisplay(holder);    
        //在指定了MediaPlayer播放的容器后，我們就可以使用prepare或者prepareAsync來准備播放了     
        player.prepareAsync();    
            
    }
    
    @Override    
    public void surfaceDestroyed(SurfaceHolder holder) {
        Log.v("Surface Destory:::", "surfaceDestroyed called");    
    }
    
    @Override  
    public void onVideoSizeChanged(MediaPlayer arg0, int arg1, int arg2) {    
        // 當video大小改變時觸發     
        //這個方法在設置player的source后至少觸發一次     
        Log.v("Video Size Change", "onVideoSizeChanged called");    
    }
    
    @Override    
    public void onSeekComplete(MediaPlayer arg0) {    
        // seek操作完成時觸發     
        Log.v("Seek Completion", "onSeekComplete called");         
    }
      
    @Override    
    public void onPrepared(MediaPlayer player) {    
        // 當prepare完成后，該方法觸發，在這里我們播放視頻     
            
        //首先取得video的寬和高     
        vWidth  = player.getVideoWidth();    
        vHeight = player.getVideoHeight();    
            
        if (vWidth > currDisplay.getWidth() || vHeight > currDisplay.getHeight()) {    
            //如果video的寬或者高超出了當前屏幕的大小，則要進行縮放     
            float wRatio = (float)vWidth/(float)currDisplay.getWidth();    
            float hRatio = (float)vHeight/(float)currDisplay.getHeight();    
                
            //選擇大的一個進行縮放     
            float ratio = Math.max(wRatio, hRatio);    
                
            vWidth = (int)Math.ceil((float)vWidth/ratio);    
            vHeight = (int)Math.ceil((float)vHeight/ratio);    
                
            //設置surfaceView的布局參數     
            surfaceView.setLayoutParams(new LinearLayout.LayoutParams(vWidth, vHeight));    
                
            //然后開始播放視頻     
                
            player.start();    
        }    
    }
      
    @Override    
    public boolean onInfo(MediaPlayer player, int whatInfo, int extra) {    
        // 當一些特定信息出現或者警告時觸發     
        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(MediaPlayer player, 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(MediaPlayer player) {    
        // 當MediaPlayer播放完成后觸發     
        Log.v("Play Over:::", "onComletion called");    
        this.finish();    
    }    
}    

 附件：android中音頻視頻開發教程(含代碼).zip