Android WebView Zoombuttonscontroller causes android.view.WindowLeaked problem to be solved completely

Activity have leaked window Android.widget.ZoomButtonsController that is originally added here android.view.WindowLeaked :

The cause of this error is:

Found to be WebView Zoombutton, that is, the two magnified and narrowed buttons, resulting. If set to let them appear, and can be automatically hidden, then, because their auto-hide is a gradual process, so in the gradual disappearance of the process if the parent container's Destroy method is called, it will cause leaked. So the solution is, before destroy, let them disappear immediately. As for the method of disappearing immediately, most of the online copy to copy, no effect. My solution is that when the activity is removed from finish, the handle view is removed. Theoretically, just remove the zoom view, but I didn't find a way to get the view, I had to remove all the sub-view. This will not be reported when the activity destroyWindowleaked's wrong.

    @Override public    void Finish () {        ViewGroup view = (ViewGroup) GetWindow (). Getdecorview ();        View.removeallviews ();        Super.finish ();    }