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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