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();          }      }

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