title: WindowManager$BadTokenException unable to add window
body: <p>I am developing app for <strong>background videorecording</strong> ,thats why i used WindowManager,but it did not worked for me.gives following errors:  </p>
  
  <pre><code>08-23 15:38:21.021: E/AndroidRuntime(4200): java.lang.RuntimeException: Unable to create service com.example.prankapp.BackgroundVideoRecorder: android.view.WindowManager$BadTokenException: Unable to add window android.view.ViewRootImpl$W@418c0b68 -- permission denied for this window type
      08-23 15:38:21.021: E/AndroidRuntime(4200):     at android.app.ActivityThread.handleCreateService(ActivityThread.java:2277)
      08-23 15:38:21.021: E/AndroidRuntime(4200):     at android.app.ActivityThread.access$1600(ActivityThread.java:128)
      08-23 15:38:21.021: E/AndroidRuntime(4200):     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1215)
      08-23 15:38:21.021: E/AndroidRuntime(4200):     at android.os.Handler.dispatchMessage(Handler.java:99)
      08-23 15:38:21.021: E/AndroidRuntime(4200):     at android.os.Looper.loop(Looper.java:137)
      08-23 15:38:21.021: E/AndroidRuntime(4200):     at android.app.ActivityThread.main(ActivityThread.java:4517)
      08-23 15:38:21.021: E/AndroidRuntime(4200):     at java.lang.reflect.Method.invokeNative(Native Method)
      08-23 15:38:21.021: E/AndroidRuntime(4200):     at java.lang.reflect.Method.invoke(Method.java:511)
      08-23 15:38:21.021: E/AndroidRuntime(4200):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:993)
      08-23 15:38:21.021: E/AndroidRuntime(4200):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:760)
      08-23 15:38:21.021: E/AndroidRuntime(4200):     at dalvik.system.NativeStart.main(Native Method)
      08-23 15:38:21.021: E/AndroidRuntime(4200): Caused by: android.view.WindowManager$BadTokenException: Unable to add window android.view.ViewRootImpl$W@418c0b68 -- permission denied for this window type
      08-23 15:38:21.021: E/AndroidRuntime(4200):     at android.view.ViewRootImpl.setView(ViewRootImpl.java:707)
      08-23 15:38:21.021: E/AndroidRuntime(4200):     at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:301)
      08-23 15:38:21.021: E/AndroidRuntime(4200):     at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:215)
      08-23 15:38:21.021: E/AndroidRuntime(4200):     at android.view.WindowManagerImpl$CompatModeWrapper.addView(WindowManagerImpl.java:140)
      08-23 15:38:21.021: E/AndroidRuntime(4200):     at com.example.prankapp.BackgroundVideoRecorder.onCreate(BackgroundVideoRecorder.java:53)
      08-23 15:38:21.021: E/AndroidRuntime(4200):     at android.app.ActivityThread.handleCreateService(ActivityThread.java:2267)
      08-23 15:38:21.021: E/AndroidRuntime(4200):     ... 10 more
  </code></pre>
  
  <p>My windowManager code:</p>
  
  <pre><code>windowManager = (WindowManager) this.getSystemService(BackgroundVideoRecorder.WINDOW_SERVICE);
              surfaceView = new SurfaceView(this);
              LayoutParams layoutParams = new WindowManager.LayoutParams(
                  1, 1,
                  WindowManager.LayoutParams.TYPE_SYSTEM_OVERLAY,
                  WindowManager.LayoutParams.FLAG_WATCH_OUTSIDE_TOUCH,
                  PixelFormat.TRANSLUCENT
              );
              //layoutParams.gravity = Gravity.LEFT | Gravity.TOP;
              windowManager.addView(surfaceView, layoutParams);
              surfaceView.getHolder().addCallback(this);
  </code></pre>
  
  <p>Please help me.Thanks in advance.</p>