Android三种播放视频的方式（全屏模式的切换）

 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");   //获取根目录里的视频
VideoView videoView = (VideoView)this.findViewById(R.id.video_view);   //获取控件
videoView.setMediaController(new MediaController(this));   // MediaController添加
videoView.setVideoURI(uri);   //获取路径
videoView.start();   //启动
 videoView.pause();//暂停

3、使用MediaPlayer：

package com.example.videosurfacedemo;         import android.net.Uri;   import android.os.Bundle;   import android.app.Activity;   import android.view.Menu;      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);                       setContentView(R.layout.main);                                  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 = "http://115.238.189.19:80/play/99E62B2B6CD720191DD8927BA73B8F9AA93FE7F8.mp4";           //Environment.getExternalStorageDirectory().getPath()+"/Test_Movie.m4v";            try {                player.setDataSource(VideoSurfaceDemo.this, Uri.parse(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();        }    }