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java.lang.IllegalArgumentException: view must not be null at android.view.WindowManagerGlobal.removeView(WindowManagerGlobal.java:346) at android.view.WindowManagerImpl.removeView(WindowManagerImpl.java:111) at com.kamron.pogoiv.Pokefly.unwatchScreen(Pokefly.java:448) at com.kamron.pogoiv.Pokefly.onDestroy(Pokefly.java:497) at android.app.ActivityThread.handleStopService(ActivityThread.java:3082)