Android三種播放視頻的方式

來源:互聯網
上載者:User

  在Android中,我們有三種方式來實現視頻的播放:

1、使用其內建的播放器。指定Action為ACTION_VIEW,Data為Uri,Type為其MIME類型。2、使用VideoView來播放。在布局檔案中使用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、調用其內建的播放器: 
Uri uri = Uri.parse(Environment.getExternalStorageDirectory().getPath()+"/Test_Movie.m4v");     //調用系統內建的播放器        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;    /**   * 該執行個體中使用MediaPlayer完成播放,同時介面使用SurfaceView來實現   *    * 這裡我們實現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介面   * 實現一些控制方法。   *    * 然後,設定controller.setMediaPlayer(),setAnchorView(),setEnabled(),show()就可以了,這裡不再實現   * @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);                        //下面開始執行個體化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");            //然後指定需要播放檔案的路徑,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();            }            //然後,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被建立的時候被調用            //在這裡我們指定MediaPlayer在當前的Surface中進行播放            player.setDisplay(holder);            //在指定了MediaPlayer播放的容器後,我們就可以使用prepare或者prepareAsync來準備播放了            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            //這個方法在設定player的source後至少觸發一次            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完成後,該方法觸發,在這裡我們播放視頻                        //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螢幕的大小,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);                                //設定surfaceView的布局參數                surfaceView.setLayoutParams(new LinearLayout.LayoutParams(vWidth, vHeight));                                //然後開始播放視頻                                player.start();            }        }        @Override        public boolean onInfo(MediaPlayer player, int whatInfo, int extra) {            // 當一些特定資訊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播放完成後觸發            Log.v("Play Over:::", "onComletion called");            this.finish();        }    }    
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