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Unable to add window -- token android.view.ViewRootImpl$W@410ad298 is not valid; is your activity running?
android.view.WindowManager$BadTokenException: Unable to add window -- token null is not valid; is your activity running?	at android.view.ViewRootImpl.setView(ViewRootImpl.java:697)	at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:345)	at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:224)	at android.view.WindowManagerImpl$CompatModeWrapper.addView(WindowManagerImpl.java:149)	at android.view.Window$LocalWindowManager.addView(Window.java:554)	at android.widget.MediaController.show(MediaController.java:338)	at android.webkit.HTML5VideoFullScreen.showControllerInFullScreen(HTML5VideoFullScreen.java:387)	at android.webkit.HTML5VideoViewProxy$VideoPlayer.end(HTML5VideoViewProxy.java:310)	at android.webkit.HTML5VideoViewProxy.handleMessage(HTML5VideoViewProxy.java:450)	at android.os.Handler.dispatchMessage(Handler.java:99)	at android.os.Looper.loop(Looper.java:137)	at android.app.ActivityThread.main(ActivityThread.java:4898)	at java.lang.reflect.Method.invokeNative(Native Method)	at java.lang.reflect.Method.invoke(Method.java:511)	at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1006)	at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:773)