当方向改变时重新创建活动时，媒体播放器不会加载

我是新使用表面视图在视频播放器中播放视频的新手，现在我想在重新加载或重新创建视图时方向发生变化时保存媒体播放器的实例状态，然后旧媒体播放器状态从旧位置开始，而不是在零位置加载到原始装置上像屏幕方向一样在清单中设置，但当时 oncreate 没有被调用，当屏幕方向改变时，我想也调用 oncreate 方法，这意味着我想在方向改变时重新加载新的活动，并保存媒体播放器状态，请确认我当时被卡住了我不知道什么错误。

 SurfaceView videoSurface;
         MediaPlayer player;
        VideoControllerView controller;
        private boolean mFullScreen = true;

        @Override
        protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.activity_video_player);



                videoSurface = (SurfaceView) findViewById(R.id.videoSurface);
                SurfaceHolder videoHolder = videoSurface.getHolder();
                videoHolder.addCallback(this);

                player = new MediaPlayer();
                controller = new VideoControllerView(this);

                try {
                    player.setAudioStreamType(AudioManager.STREAM_MUSIC);
                    player.setDataSource(this, Uri.parse("http://clips.vorwaerts-gmbh.de/big_buck_bunny.mp4"));
                    player.setOnPreparedListener(this);
                } catch (IllegalArgumentException e) {
                    e.printStackTrace();
                } catch (SecurityException e) {
                    e.printStackTrace();
                } catch (IllegalStateException e) {
                    e.printStackTrace();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }

            @Override
            public boolean onTouchEvent(MotionEvent event) {
                controller.show();
                return false;
            }

            // Implement SurfaceHolder.Callback
            @Override
            public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {

            }

            @Override
            public void surfaceCreated(SurfaceHolder holder) {
              player.setDisplay(holder);
              player.prepareAsync();
            }

            @Override
            public void surfaceDestroyed(SurfaceHolder holder) {

            }
            // End SurfaceHolder.Callback

            // Implement MediaPlayer.OnPreparedListener
            @Override
            public void onPrepared(MediaPlayer mp) {
                controller.setMediaPlayer(this);
                controller.setAnchorView((FrameLayout) findViewById(R.id.videoSurfaceContainer));
                player.start();
            }
            // End MediaPlayer.OnPreparedListener

            // Implement VideoMediaController.MediaPlayerControl
            @Override
            public boolean canPause() {
                return true;
            }

            @Override
            public boolean canSeekBackward() {
                return true;
            }

            @Override
            public boolean canSeekForward() {
                return true;
            }

            @Override
            public int getBufferPercentage() {
                return 0;
            }

            @Override
            public int getCurrentPosition() {
                return player.getCurrentPosition();
            }

            @Override
            public int getDuration() {
                return player.getDuration();
            }

            @Override
            public boolean isPlaying() {
                return player.isPlaying();
            }

            @Override
            public void pause() {
                player.pause();
            }

            @Override
            public void seekTo(int i) {
                player.seekTo(i);
            }

            @Override
            public void start() {
                player.start();
            }



            @Override
        public boolean isFullScreen() {
            if(mFullScreen){
                Log.w("FullScreen", "--set icon full screen--");
                Log.w("curr",player.getCurrentPosition()+"");
            /*    ImageButton mFullscreenButton=(ImageButton)controller.findViewById(R.id.fullscreen);
                mFullscreenButton.setImageResource(R.drawable.ic_media_fullscreen_stretch);
               */ return false;
            }else{
                Log.w("FullScreen", "--set icon small full screen--");
                return true;
            }
        }

        @Override
        public void toggleFullScreen() {
            Log.w("FullScreen", "-----------------click toggleFullScreen-----------");
            setFullScreen(isFullScreen());

        }
        // End VideoMediaController.MediaPlayerControl

        public void setFullScreen(boolean fullScreen){
            fullScreen = false;

            if (mFullScreen)

            {
                Log.w("FullScreen", "-----------Set full screen SCREEN_ORIENTATION_LANDSCAPE------------");

                setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);
                DisplayMetrics displaymetrics = new DisplayMetrics();
                getWindowManager().getDefaultDisplay().getMetrics(displaymetrics);
                int height = displaymetrics.heightPixels;
                int width = displaymetrics.widthPixels;
                android.widget.FrameLayout.LayoutParams params = (android.widget.FrameLayout.LayoutParams) videoSurface.getLayoutParams();
                params.width = width;
                params.height=height;
                params.setMargins(0, 0, 0, 0);
                //set icon is full screen
                mFullScreen = fullScreen;
            }
            else{
                Log.w("FullScreen", "-----------Set small screen SCREEN_ORIENTATION_PORTRAIT------------");
                setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);
                DisplayMetrics displaymetrics = new DisplayMetrics();
                getWindowManager().getDefaultDisplay().getMetrics(displaymetrics);
                final FrameLayout mFrame = (FrameLayout) findViewById(R.id.videoSurfaceContainer);
                // int height = displaymetrics.heightPixels;
                int height =225;//get height Frame Container video//mFrame.getHeight()
                int width =displaymetrics.widthPixels;
                android.widget.FrameLayout.LayoutParams params = (android.widget.FrameLayout.LayoutParams) videoSurface.getLayoutParams();
                params.width = width;
                params.height= height;
                params.setMargins(0, 0, 0, 0);
                //set icon is small screen
                mFullScreen = !fullScreen;
            }
        }
       @Override
       protected void onSaveInstanceState(Bundle estadoguardado){

           super.onSaveInstanceState(estadoguardado);
           if(player!=null){

               int pos=player.getCurrentPosition();
               estadoguardado.putInt("posicion", pos);
           }

       }

        @Override
        protected void onRestoreInstanceState(Bundle estadoguardado)
        {

            super.onRestoreInstanceState(estadoguardado);
            if(estadoguardado!=null && player!=null){
                int pos=estadoguardado.getInt("posicion");
                Log.w("position",pos+"");
                player.seekTo(pos);

            }

        }

        @Override
        public void onResume()
        {


            super.onResume();
            try {
                //reinicia
                Toast.makeText(this, "onResume2", Toast.LENGTH_SHORT).show();
                if (player == null)
                    player.setDataSource(this, Uri.parse("http://clips.vorwaerts-gmbh.de/big_buck_bunny.mp4"));
                player.seekTo(0);
                player.setLooping(true);
                player.start();
            }
            catch(Exception e)
            {
                e.printStackTrace();
            }
        }
        @Override
        public void onPause()
        {
            super.onPause();
            Toast.makeText(this, "onPause2", Toast.LENGTH_SHORT).show();
            //LIBERA A MEDIA PLAYER
            if (player != null)
            {
                player.release();
                player = null;
            }

以及其他从frameLayout扩展的类

应用程序运行时会发生一些崩溃

java.lang.IllegalStateException
            at android.media.MediaPlayer.prepareAsync(Native Method)
            at whizpool.videoplayerexample.VideoPlayerActivity.surfaceCreated(VideoPlayerActivity.java:70)
            at android.view.SurfaceView.updateWindow(SurfaceView.java:554)
            at android.view.SurfaceView.access$000(SurfaceView.java:81)
            at android.view.SurfaceView$3.onPreDraw(SurfaceView.java:169)
            at android.view.ViewTreeObserver.dispatchOnPreDraw(ViewTreeObserver.java:693)
            at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1762)
            at android.os.Looper.loop(Looper.java:137)
            at android.app.ActivityThread.main(ActivityThread.java:4666)
            at java.lang.reflect.Method.invokeNative(Native Method)
            at java.lang.reflect.Method.invoke(Method.java:511   
10-12 10:00:48.726    2268-2268/whizpool.videoplayerexample E/MediaPlayer﹕ Attempt to perform seekTo in wrong state: mPlayer=0x18332b8, mCurrentState=2
10-12 10:00:48.726    2268-2268/whizpool.videoplayerexample E/MediaPlayer﹕ error (-38, 0)
10-12 10:00:48.727    2268-2268/whizpool.videoplayerexample E/MediaPlayer﹕ start called in state 0
10-12 10:00:48.727    2268-2268/whizpool.videoplayerexample E/MediaPlayer﹕ error (-38, 0)
10-12 10:00:48.738    2268-2268/whizpool.videoplayerexample E/MediaPlayer﹕ Error (-38,0)
10-12 10:00:48.738    2268-2268/whizpool.videoplayerexample E/MediaPlayer﹕ Error (-38,0)
10-12 10:00:48.885    2268-2268/whizpool.videoplayerexample E/MediaPlayer﹕ prepareAsync called in state 0

您需要在几秒钟后将方向重置为 SCREEN_ORIENTATION_SENSOR，以便传感器再次开始工作。

setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);

new Handler().postDelayed(new Runnable() {

    @Override
    public void run() {

        setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_SENSOR);

    }
}, 2000);