Android视频播放

2019-11-08 00:05:07

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很多时候我们想在自己的项目中加入视频播放，可以使用android本身自带的播放器：Action为ACTION_VIEW,Data为Uri，Type为其MIME类型。还有其他两种分别是VideoView和MediaPlayer类和SurfaceView来实现，MediaPlayer相对来说比较灵活

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);

使用VideoView来实现

VideoView vv_main_video = (VideoView) findViewById(R.id.vv_main_video); //给VideoView设置视频的来源 vv_main_video.setVideoPath("file://mnt/sdcard/movies/advideo.mp4"); //实例化媒体控制器 MediaController mediaController=new MediaController(this); vv_main_video.setMediaController(mediaController); mediaController.setMediaPlayer(vv_main_video); vv_main_video.start();

MediaPlayer

public class OperateMedia implements OnBufferingUpdateListener, OnCompletionListener, OnErrorListener { PRivate int position = 0;// 保存播放的的位置 private SurfaceView surfaceView;// surfaceVie对象 private Context context;// 上下文对象 private MediaPlayer mediaPlayer;// mediaplayer对象 private int currentPlay = 0;// 保存当前正在播放的视频 0表示还没有记录 private boolean justBack = false;// 是否刚才另外一个界面跳回，fasle 表示不是 public OperateMedia(Context context, MediaPlayer mediaPlayer, SurfaceView surfaceView) { // TODO Auto-generated constructor stub this.context = context; this.mediaPlayer = mediaPlayer; this.surfaceView = surfaceView; // mediaPlayer的设置 this.mediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC); this.mediaPlayer.setOnBufferingUpdateListener(this); this.mediaPlayer.setOnCompletionListener(this); // surfaceView的设置 this.surfaceView.getHolder().setKeepScreenOn(true); this.surfaceView.getHolder().setType( SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS); this.surfaceView.getHolder().addCallback(new SurfaceCallback()); // surfaceView的回调 } // 设置播放不同的视频 public void loadSrc(int num) { // 如果在次播放的是不同的视频，那么就将position初始化,并且reset,重新设置视频源 if (num != currentPlay) { position = 0; try { currentPlay = num; mediaPlayer.reset(); AssetFileDescriptor fd = null; switch (num) { case 0: fd = context.getAssets().openFd("a.mp4"); break; case 1: fd = context.getAssets().openFd("b.mp4"); break; case 2: fd = context.getAssets().openFd("c.mp4"); break; case 3: fd = context.getAssets().openFd("d.mp4"); break; } mediaPlayer.setDataSource(fd.getFileDescriptor(), fd.getStartOffset(), fd.getLength()); play(); } catch (IllegalArgumentException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (IllegalStateException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } return;// 中断当前程序 } // 如果点击的是同一个视频。那么就不用reset了 if (num == currentPlay) { if (justBack) { play(); return; } else {//如果不是从另一个activity切换回来，那么，就直接设置到0，开始播放 mediaPlayer.seekTo(0); mediaPlayer.start(); mediaPlayer.setDisplay(surfaceView.getHolder());// 设置屏幕 } } } // 播放视频 public void play() { mediaPlayer.prepareAsync(); mediaPlayer.setOnPreparedListener(new OnPreparedListener() { public void onPrepared(MediaPlayer mp) { if (position > 0) { mediaPlayer.seekTo(position); if (justBack) { justBack = false; position = 0; } } mediaPlayer.start(); } }); mediaPlayer.setDisplay(surfaceView.getHolder());// 设置屏幕 } // 视频播放完成的回调方法 public void onCompletion(MediaPlayer mp) throws IllegalStateException { if (currentPlay == 0) { MediaVideo.justPlay = false; } } // public void onBufferingUpdate(MediaPlayer mp, int percent) throws IllegalStateException { } // SurfaceView的callBack private class SurfaceCallback implements SurfaceHolder.Callback { public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) { } public void surfaceCreated(SurfaceHolder holder) { if (position > 0) { loadSrc(currentPlay); } } public void surfaceDestroyed(SurfaceHolder holder) { // 界面销毁，即将跳转到另外一个界面 if (mediaPlayer.isPlaying()) { justBack = true; position = mediaPlayer.getCurrentPosition(); mediaPlayer.stop(); } } } public boolean onError(MediaPlayer mp, int what, int extra) { return false; } }

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