Android播放视频的三种方式
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:
Uriuri=Uri.parse(Environment.getExternalStorageDirectory().getPath()+"/Test_Movie.m4v"); //调用系统自带的播放器 Intentintent=newIntent(Intent.ACTION_VIEW); Log.v("URI:::::::::",uri.toString()); intent.setDataAndType(uri,"video/mp4"); startActivity(intent);
2、使用VideoView来实现:
Uriuri=Uri.parse(Environment.getExternalStorageDirectory().getPath()+"/Test_Movie.m4v"); VideoViewvideoView=(VideoView)this.findViewById(R.id.video_view); videoView.setMediaController(newMediaController(this)); videoView.setVideoURI(uri); videoView.start(); videoView.requestFocus();
3、使用MediaPlayer:
packagedemo.camera; importjava.io.IOException; importandroid.app.Activity; importandroid.media.MediaPlayer; importandroid.media.MediaPlayer.OnCompletionListener; importandroid.media.MediaPlayer.OnErrorListener; importandroid.media.MediaPlayer.OnInfoListener; importandroid.media.MediaPlayer.OnPreparedListener; importandroid.media.MediaPlayer.OnSeekCompleteListener; importandroid.media.MediaPlayer.OnVideoSizeChangedListener; importandroid.os.Bundle; importandroid.os.Environment; importandroid.util.Log; importandroid.view.Display; importandroid.view.SurfaceHolder; importandroid.view.SurfaceView; importandroid.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 *@authorAdministrator * */ publicclassVideoSurfaceDemoextendsActivityimplementsOnCompletionListener,OnErrorListener,OnInfoListener, OnPreparedListener,OnSeekCompleteListener,OnVideoSizeChangedListener,SurfaceHolder.Callback{ privateDisplaycurrDisplay; privateSurfaceViewsurfaceView; privateSurfaceHolderholder; privateMediaPlayerplayer; privateintvWidth,vHeight; //privatebooleanreadyToPlay=false; publicvoidonCreate(BundlesavedInstanceState){ 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=newMediaPlayer(); player.setOnCompletionListener(this); player.setOnErrorListener(this); player.setOnInfoListener(this); player.setOnPreparedListener(this); player.setOnSeekCompleteListener(this); player.setOnVideoSizeChangedListener(this); Log.v("Begin:::","surfaceDestroyedcalled"); //然后指定需要播放文件的路径,初始化MediaPlayer StringdataPath=Environment.getExternalStorageDirectory().getPath()+"/Test_Movie.m4v"; try{ player.setDataSource(dataPath); Log.v("Next:::","surfaceDestroyedcalled"); }catch(IllegalArgumentExceptione){ e.printStackTrace(); }catch(IllegalStateExceptione){ e.printStackTrace(); }catch(IOExceptione){ e.printStackTrace(); } //然后,我们取得当前Display对象 currDisplay=this.getWindowManager().getDefaultDisplay(); } @Override publicvoidsurfaceChanged(SurfaceHolderarg0,intarg1,intarg2,intarg3){ //当Surface尺寸等参数改变时触发 Log.v("SurfaceChange:::","surfaceChangedcalled"); } @Override publicvoidsurfaceCreated(SurfaceHolderholder){ //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 publicvoidsurfaceDestroyed(SurfaceHolderholder){ Log.v("SurfaceDestory:::","surfaceDestroyedcalled"); } @Override publicvoidonVideoSizeChanged(MediaPlayerarg0,intarg1,intarg2){ //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("VideoSizeChange","onVideoSizeChangedcalled"); } @Override publicvoidonSeekComplete(MediaPlayerarg0){ //seek操作完成时触发 Log.v("SeekCompletion","onSeekCompletecalled"); } @Override publicvoidonPrepared(MediaPlayerplayer){ //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 floatwRatio=(float)vWidth/(float)currDisplay.getWidth(); floathRatio=(float)vHeight/(float)currDisplay.getHeight(); //选择大的一个进行缩放 floatratio=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(newLinearLayout.LayoutParams(vWidth,vHeight)); //然后开始播放视频 player.start(); } } @Override publicbooleanonInfo(MediaPlayerplayer,intwhatInfo,intextra){ //当一些特定信息出现或者警告时触发 switch(whatInfo){ caseMediaPlayer.MEDIA_INFO_BAD_INTERLEAVING: break; caseMediaPlayer.MEDIA_INFO_METADATA_UPDATE: break; caseMediaPlayer.MEDIA_INFO_VIDEO_TRACK_LAGGING: break; caseMediaPlayer.MEDIA_INFO_NOT_SEEKABLE: break; } returnfalse; } @Override publicbooleanonError(MediaPlayerplayer,intwhatError,intextra){ Log.v("PlayError:::","onErrorcalled"); switch(whatError){ caseMediaPlayer.MEDIA_ERROR_SERVER_DIED: Log.v("PlayError:::","MEDIA_ERROR_SERVER_DIED"); break; caseMediaPlayer.MEDIA_ERROR_UNKNOWN: Log.v("PlayError:::","MEDIA_ERROR_UNKNOWN"); break; default: break; } returnfalse; } @Override publicvoidonCompletion(MediaPlayerplayer){ //当MediaPlayer播放完成后触发 Log.v("PlayOver:::","onComletioncalled"); this.finish(); } }
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