WindowManager中的错误（在服务中）：无法添加窗口 - 令牌null不适用于应用程序

Question

我知道在SO中有很多关于这个错误的问题，但我的问题是不同的。我正在尝试在videoview中播放sdcard的视频。 VideoView使用serivce在WindowManager上运行。因此，该应用程序可以在任何应用程序之上播放视频。每件事都有效，我可以播放视频。但是我的手机中存在损坏的文件，并未在其他任何视频播放器中播放。它会说错误读取文件。但是当我用我的应用程序打开该视频文件时，现在服务运行然后出现问题，APP正在崩溃。我无法解决问题，以至于Toast错误读取视频文件。我试过

   videoView.setOnErrorListener(new MediaPlayer.OnErrorListener() {
        @Override
        public boolean onError(MediaPlayer mp, int what, int extra) {
            Toast.makeText(getBaseContext(), "Error reading file", Toast.LENGTH_SHORT).show();
            return false;
        }
    });

没用。

CODE：

public class VideoWindow extends Service {

     private WindowManager windowManager;
     private RelativeLayout relativeLayout;
     WindowManager.LayoutParams params;
     private GestureDetectorCompat gestureDetectorCompat;
     private View mLayout;
     DisplayMetrics metrics;
     private boolean didFling;
     private int[] clickLocation = new int[2];
     private static final String LOG_TAG = "Floaty";
     private float ratioY = 0;
     private float oldWidth = 0;
     private float oldX = 0;
     private boolean confChange = false;
     private VideoView videoView;
     private ProgressBar progressBar;
     private int position = 0;
     private String videoUrl;

@Override
public int onStartCommand(Intent intent, int flags, int startId) {
    Log.d("OnStartCommandStarted", "true");
    metrics = new DisplayMetrics();
    windowManager.getDefaultDisplay().getMetrics(metrics);
    confChange = intent.getExtras().getBoolean("confchange");
    oldX = intent.getExtras().getFloat("oldX");
    ratioY = intent.getExtras().getFloat("ratioY");
    oldWidth = intent.getExtras().getFloat("oldWidth");
    videoUrl = intent.getExtras().getString("videourl");
    position = intent.getExtras().getInt("position");
    windowManager.removeView(mLayout);

    if (confChange) {
        confChange = false;
        Log.d("Configure change","true");
        if (oldX < (oldWidth / 2)) {
            params.x = 0;
        } else {
            params.x = metrics.widthPixels;
        }
        params.y = (int) (metrics.heightPixels * ratioY);
    } else {
        params.x = metrics.widthPixels;
        params.y = 0;
    }
    windowManager.addView(mLayout,params);
    playVideo();

    return START_NOT_STICKY;
}

@Override
public void onCreate() {
    super.onCreate();
    Log.d("OnCreate Started", "true");

    gestureDetectorCompat = new GestureDetectorCompat(this,new Gesture());
    LayoutInflater layoutInflater=(LayoutInflater)getSystemService(Context.LAYOUT_INFLATER_SERVICE);
    mLayout=layoutInflater.inflate(R.layout.smallwindow, null);
    relativeLayout = (RelativeLayout)mLayout.findViewById(R.id.body);
    videoView = (VideoView)mLayout.findViewById(R.id.videoview);
    progressBar = (ProgressBar)mLayout.findViewById(R.id.videoloadprogress);
    progressBar.setVisibility(View.VISIBLE);

    windowManager = (WindowManager) getSystemService(WINDOW_SERVICE);
    metrics = new DisplayMetrics();
    windowManager.getDefaultDisplay().getMetrics(metrics);


    params= new WindowManager.LayoutParams(
            WindowManager.LayoutParams.WRAP_CONTENT,
            WindowManager.LayoutParams.WRAP_CONTENT,
            WindowManager.LayoutParams.TYPE_PHONE,
            WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE,
            PixelFormat.TRANSLUCENT);

    params.gravity = Gravity.TOP| Gravity.START;


    Log.d("Configure", String.valueOf(confChange));

    relativeLayout.setOnTouchListener(new View.OnTouchListener() {
        @Override
        public boolean onTouch(View v, MotionEvent event) {
            gestureDetectorCompat.onTouchEvent(event);
            if (event.getAction() == MotionEvent.ACTION_UP) {
                relativeLayout.setAlpha(1.0f);
                if (!didFling) {
                    Log.d(LOG_TAG, "ACTION_UP");
                    int newX = params.x;
                    if (newX > (metrics.widthPixels / 2)) {
                        params.x = metrics.widthPixels;
                    } else {
                        params.x = 0;
                    }
                    windowManager.updateViewLayout(mLayout, params);
                }
            }
            return true;
        }
    });
    windowManager.addView(mLayout, params);

}


private void playVideo(){
    videoView.setOnErrorListener(new MediaPlayer.OnErrorListener() {
        @Override
        public boolean onError(MediaPlayer mp, int what, int extra) {
            Toast.makeText(getBaseContext(), "Error reading file", Toast.LENGTH_SHORT).show();
            return false;
        }
    });


    try{
        Log.d("videoUrl",videoUrl);
        videoView.setVideoURI(Uri.parse(videoUrl));

    } catch (IllegalArgumentException e) {
        e.printStackTrace();
    } catch (SecurityException e) {
        e.printStackTrace();
    } catch (IllegalStateException e) {
        e.printStackTrace();
    } catch (Exception e){
        Toast.makeText(this,"Error reading file",Toast.LENGTH_SHORT).show();
        Log.e("Error", e.getMessage());
        e.printStackTrace();
    }
    videoView.requestFocus();
    videoView.setOnPreparedListener(new MediaPlayer.OnPreparedListener() {
        @Override
        public void onPrepared(MediaPlayer mp) {
            videoView.seekTo(position);
            progressBar.setVisibility(View.INVISIBLE);
            if (position == 0) {
                videoView.start();
            } else if(position>0) {
                videoView.start();
                videoView.seekTo(position);
                position=0;
            }else{
                videoView.pause();
            }

        }
    });

}

@Override
public void onConfigurationChanged(Configuration newConfig) {
    if (newConfig.orientation == Configuration.ORIENTATION_LANDSCAPE || newConfig.orientation == Configuration.ORIENTATION_PORTRAIT) {

        int[] location = new int[2];
        mLayout.getLocationOnScreen(location);
        oldWidth = metrics.widthPixels;

            oldX = location[0];
            ratioY = (float) (location[1]) / (float) metrics.heightPixels;
        this.stopService(new Intent(this, VideoWindow.class));

        confChange=true;
        Intent intent = new Intent(this, VideoWindow.class);
        intent.putExtra("confchange",confChange);
        intent.putExtra("oldX",oldX);
        intent.putExtra("ratioY",ratioY);
        intent.putExtra("oldWidth",oldWidth);
        intent.putExtra("clickLocation",clickLocation);
        intent.putExtra("videourl",videoUrl);
        intent.putExtra("position",videoView.getCurrentPosition());
        this.startService(intent);
        Log.d("OnConfigurationChanged","true");
    }
}


@Override
public IBinder onBind(Intent intent) {
    // TODO Auto-generated method stub
    return null;
}


private class Gesture extends GestureDetector.SimpleOnGestureListener {

    private int initialX;
    private int initialY;
    private float initialTouchX;
    private float initialTouchY;

    @Override
    public boolean onDown(MotionEvent event) {
        Log.d(LOG_TAG, "onDown");
        initialX = params.x;
        initialY = params.y;
        initialTouchX = event.getRawX();
        initialTouchY = event.getRawY();
        didFling = false;
        return false;
    }

    @Override
    public void onShowPress(MotionEvent e) {
        Log.d(LOG_TAG, "onShowPress");
        relativeLayout.setAlpha(0.9f);
    }

    @Override
    public boolean onScroll(MotionEvent e1, MotionEvent e2, float distanceX, float distanceY) {
        if (relativeLayout.getVisibility() == View.VISIBLE) {
            params.flags = WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE;
            params.width = WindowManager.LayoutParams.WRAP_CONTENT;
            params.height = WindowManager.LayoutParams.WRAP_CONTENT;
            mLayout.setBackgroundColor(Color.argb(0, 0, 0, 0));
        }
        params.x = (initialX + (int) ((e2.getRawX() - initialTouchX)));
        params.y = (initialY + (int) ((e2.getRawY() - initialTouchY)));
        windowManager.updateViewLayout(mLayout, params);
        return false;
    }

    @Override
    public boolean onSingleTapConfirmed(MotionEvent e) {
        Log.d(LOG_TAG, "onSingleTapConfirmed");

        return false;
    }

    @Override
    public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX, float velocityY) {
        Log.d(LOG_TAG, "onFling");
        didFling = true;
        int newX = params.x;
        if (newX > (metrics.widthPixels / 2))
            params.x = metrics.widthPixels;
        else
            params.x = 0;
        windowManager.updateViewLayout(mLayout, params);
        return false;
    }

    @Override
    public void onLongPress(MotionEvent e) {
        super.onLongPress(e);
        stopService(new Intent(getApplicationContext(), VideoWindow.class));
    }

}
@Override
public void onDestroy() {
    super.onDestroy();
    if (mLayout != null){
        windowManager.removeView(mLayout);
    }
}
}

堆栈跟踪：

10-11 19:18:29.911 6268-6302/com.ficean.floatingvideoplayer I/OpenGLRenderer: Initialized EGL, version 1.4
10-11 19:18:29.922 6268-6302/com.ficean.floatingvideoplayer D/OpenGLRenderer: Enabling debug mode 0
10-11 19:18:29.927 6268-6302/com.ficean.floatingvideoplayer I/qdutils: PartialUpdate status: Disabled
10-11 19:18:29.927 6268-6302/com.ficean.floatingvideoplayer I/qdutils: Left Align: 0
10-11 19:18:29.927 6268-6302/com.ficean.floatingvideoplayer I/qdutils: Width Align: 0
10-11 19:18:29.927 6268-6302/com.ficean.floatingvideoplayer I/qdutils: Top Align: 0
10-11 19:18:29.927 6268-6302/com.ficean.floatingvideoplayer I/qdutils: Height Align: 0
10-11 19:18:29.927 6268-6302/com.ficean.floatingvideoplayer I/qdutils: Min ROI Width: 0
10-11 19:18:29.927 6268-6302/com.ficean.floatingvideoplayer I/qdutils: Min ROI Height: 0
10-11 19:18:29.927 6268-6302/com.ficean.floatingvideoplayer I/qdutils: Needs ROI Merge: 0
10-11 19:18:29.927 6268-6302/com.ficean.floatingvideoplayer I/qdutils: Dynamic Fps: Disabled
10-11 19:18:29.927 6268-6302/com.ficean.floatingvideoplayer I/qdutils: Min Panel fps: 0
10-11 19:18:29.927 6268-6302/com.ficean.floatingvideoplayer I/qdutils: Max Panel fps: 0
10-11 19:18:32.696 6268-6546/com.ficean.floatingvideoplayer D/skia: --- SkImageDecoder::Factory returned null
10-11 19:18:32.696 6268-6546/com.ficean.floatingvideoplayer D/skia: --- SkImageDecoder::Factory returned null
10-11 19:18:32.759 6268-6546/com.ficean.floatingvideoplayer E/MediaMetadataRetrieverJNI: getFrameAtTime: videoFrame is a NULL pointer
10-11 19:18:34.624 6268-6735/com.ficean.floatingvideoplayer I/ListingVideos:  query count=9
10-11 19:18:34.624 6268-6735/com.ficean.floatingvideoplayer D/videos: /storage/emulated/0/Movies/Onamalu Telugu Full Movie HD - Rajendra Prasad _ Kalyani _ Kranthi Madhav_HIGH-mc.mp4
10-11 19:18:34.673 6268-6268/com.ficean.floatingvideoplayer D/Loaded: true
10-11 19:18:34.685 6268-6759/com.ficean.floatingvideoplayer D/skia: --- SkImageDecoder::Factory returned null
10-11 19:18:34.686 6268-6759/com.ficean.floatingvideoplayer D/skia: --- SkImageDecoder::Factory returned null
10-11 19:18:34.719 6268-6759/com.ficean.floatingvideoplayer E/MediaMetadataRetrieverJNI: getFrameAtTime: videoFrame is a NULL pointer
10-11 19:18:38.832 6268-6268/com.ficean.floatingvideoplayer D/OnCreate Started: true
10-11 19:18:38.868 6268-6268/com.ficean.floatingvideoplayer D/Configure: false
10-11 19:18:38.878 6268-6268/com.ficean.floatingvideoplayer D/OnStartCommandStarted: true
10-11 19:18:38.902 6268-6268/com.ficean.floatingvideoplayer D/videoUrl: /storage/emulated/0/Movies/Onamalu Telugu Full Movie HD - Rajendra Prasad _ Kalyani _ Kranthi Madhav_HIGH-mc.mp4
10-11 19:18:38.971 6268-6268/com.ficean.floatingvideoplayer D/MediaPlayer: Couldn't open file on client side, trying server side
10-11 19:18:39.022 6268-6289/com.ficean.floatingvideoplayer E/MediaPlayer: error (1, -2147483648)
10-11 19:18:39.056 6268-6268/com.ficean.floatingvideoplayer E/MediaPlayer: Error (1,-2147483648)
10-11 19:18:39.056 6268-6268/com.ficean.floatingvideoplayer D/VideoView: Error: 1,-2147483648
10-11 19:18:39.140 6268-6268/com.ficean.floatingvideoplayer D/AndroidRuntime: Shutting down VM
10-11 19:18:39.141 6268-6268/com.ficean.floatingvideoplayer E/AndroidRuntime: FATAL EXCEPTION: main
                                                                          Process: com.ficean.floatingvideoplayer, PID: 6268
                                                                          android.view.WindowManager$BadTokenException: Unable to add window -- token null is not for an application
                                                                              at android.view.ViewRootImpl.setView(ViewRootImpl.java:583)
                                                                              at android.view.WindowManagerGlobal.addView(WindowManagerGlobal.java:282)
                                                                              at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:85)
                                                                              at android.app.Dialog.show(Dialog.java:298)
                                                                              at android.app.AlertDialog$Builder.show(AlertDialog.java:993)
                                                                              at android.widget.VideoView$5.onError(VideoView.java:537)
                                                                              at android.media.MediaPlayer$EventHandler.handleMessage(MediaPlayer.java:2592)
                                                                              at android.os.Handler.dispatchMessage(Handler.java:102)
                                                                              at android.os.Looper.loop(Looper.java:135)
                                                                              at android.app.ActivityThread.main(ActivityThread.java:5343)
                                                                              at java.lang.reflect.Method.invoke(Native Method)
                                                                              at java.lang.reflect.Method.invoke(Method.java:372)
                                                                              at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:907)
                                                                              at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:702)