android 全屏视频播放（SurfaceView ＋ MediaPlayer）
介绍个第三方：
JieCaoVideoPlayer
实现Android的全屏视频播放，支持完全自定义UI、手势修改进度和音量、hls、rtsp，设置http头信息，也能在ListView、ViewPager和ListView、ViewPager和Fragment等多重嵌套模式下全屏工作，占用空间非常小，不到60k。
本次是通过 SurfaceView + MediaPlayer 实现 横屏 全屏 播放。
//注意修改：
WindowFeature下的：Window.FEATURE_NO_TITLE, Window.FEATURE_INDETERMINATE_PROGRESS
Fullscreen
AndroidManifest.xml下activity节点添加android:screenOrientation="landscape"
1）通过 AudioManager 控制视频声音。
2）通过getWindow().getAttributes().screenBrightness 获取当前亮度，通过继承SimpleOnGestureListener手势监听onScroll，onSingleTapUp事件，
重新生成
1 WindowManager.LayoutParams lpa = getWindow().getAttributes();
2 if (lpa.screenBrightness > 1.0f)
3 lpa.screenBrightness = 1.0f;
4 else if (lpa.screenBrightness < 0.01f)
5 lpa.screenBrightness = 0.01f;
6
7 getWindow().setAttributes(lpa);
3）activity oncreate 进行初始化 MediaPlayer， SurfaceView Holder
1 if (mediaPlayer == null) {
2 mediaPlayer = new MediaPlayer();
3 // 不维持自身缓冲区，直接显示
4 // this value only use Hardware decoder before Android 2.3
5 if (Build.VERSION.SDK_INT < Build.VERSION_CODES.HONEYCOMB
6 && mHardwareDecoder) {
7 sv_videoplayer.getHolder().setType(
8 SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
9 }
10 sv_videoplayer.getHolder().setFixedSize(
11 ScreenUtils.getScreenHeight(this),
12 ScreenUtils.getScreenWidth(this));
13
14 sv_videoplayer.getHolder().setFormat(PixelFormat.RGBA_8888);
15
16 sv_videoplayer.getHolder().setKeepScreenOn(true);
17 sv_videoplayer.getHolder().addCallback(new SurFaceCallback());
18 }
4）调用 MediaPlayer 进行播放
1 mediaPlayer.reset();
2 mediaPlayer.setDataSource(playUrl);
3 mediaPlayer.setDisplay(sv_videoplayer.getHolder());
4 // 缓冲
5 mediaPlayer.prepareAsync();
6 mediaPlayer
7 .setOnBufferingUpdateListener(new BufferingUpdateListener());
8 mediaPlayer.setOnPreparedListener(new PreparedListener(position));
9 mediaPlayer.setOnCompletionListener(new CompletionListener());
5）在缓冲就绪初始化MediaController
1 /**
2 * //调用该方法,MediaPlayer就进入了"准备就绪" //状态,准备开始播放. //此处可用于动态设置SurfaceView的宽和高
3 *
4 */
5 private final class PreparedListener implements OnPreparedListener {
6 private int position;
7
8 public PreparedListener(int position) {
9 this.position = position;
10 }
11
12 @Override
13 public void onPrepared(MediaPlayer arg0) {
14 // TODO Auto-generated method stub
15 //MediaController进行设置和使用
16 mMediaController.setMediaPlayer(VideoPlayerActivity.this);
17 mMediaController.setAnchorView(findViewById(R.id.rl_video_player));
18 mMediaController.setEnabled(true);
19 mMediaController.show();
20 mediaPlayer.start();
21 mProgressBar.setVisibility(View.GONE);
22 mLoadRate.setVisibility(View.GONE);
23 if (position > 0)
24 mediaPlayer.seekTo(position);
25 }
26
27 }
6）显示缓冲百分比
1 private final class BufferingUpdateListener implements
2 OnBufferingUpdateListener {
3
4 @Override
5 public void onBufferingUpdate(MediaPlayer arg0, int percent) {
6 // TODO Auto-generated method stub
7 mLoadRate.setText(percent + "%");
8 }
9 }
7）使用getHolder().addCallback(new SurFaceCallback())，继承Callback，
SurfaceView 所在Activity 离开了前台，SurfaceView会被destory。当Activity又重新
回到前台时，SurfaceView会被重新创建，SurfaceView是在onResume（）方法之后被创建。
防止视频过程中，电话来到，导致视频播放失败。
1 private final class SurFaceCallback implements Callback {
2
3 @Override
4 public void surfaceChanged(SurfaceHolder arg0, int arg1, int arg2,
5 int arg3) {
6
7 }
8
9 @Override
10 public void surfaceCreated(SurfaceHolder arg0) {
11 if (mediaPlayer == null) {
12 return;
13 }
14 if (playUrl != null && position > 0) {
15 play(position);
16 position = 0;
17 }
18 }
19
20 @Override
21 public void surfaceDestroyed(SurfaceHolder arg0) {
22 if (mediaPlayer == null) {
23 return;
24 }
25 if (mediaPlayer.isPlaying()) {
26 mediaPlayer.stop();
27 }
28 }
29 }