Android三种播放视频的方式

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在Android中，我们有三种方式来实现视频的播放：

1、使用其自带的播放器。指定Action为ACTION_VIEW,Data为Uri，Type为其MIME类型。

2、使用VideoView来播放。在布局文件中使用VideoView结合MediaController来实现对其控制。

3、使用MediaPlayer类和SurfaceView来实现，这种方式很灵活。

1、调用其自带的播放器：

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

2、使用VideoView来实现：

    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;  
    /** 
     * 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 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);  
            //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(SurfaceHolder arg0, 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(SurfaceHolder holder) {  
            // 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(SurfaceHolder holder) {  
              
            Log.v("Surface Destory:::", "surfaceDestroyed called");  
        }  
        @Override  
        public void onVideoSizeChanged(MediaPlayer arg0, 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(MediaPlayer arg0) {  
            // seek操作完成时触发  
            Log.v("Seek Completion", "onSeekComplete called");  
              
        }  
        @Override  
        public void onPrepared(MediaPlayer player) {  
            // 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(MediaPlayer player, 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(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) {  
            // 当MediaPlayer播放完成后触发  
            Log.v("Play Over:::", "onComletion called");  
            this.finish();  
        }  
    }