Android三种播放视频的方式

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();  

    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();            }        }