android.view.WindowManager$BadTokenException: Unable to add window -- token android.os.BinderProxy@43e8635 is not valid; is your activity running?
	at android.view.ViewRootImpl.setView(ViewRootImpl.java:946)
	at android.view.WindowManagerGlobal.addView(WindowManagerGlobal.java:387)
	at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:95)
	at android.app.Dialog.show(Dialog.java:342)
	at com.entitcs.office_attendance.activities.Drawer_Activity$y.onClick(Unknown Source:117)
	at android.view.View.performClick(View.java:7156)
	at android.view.View.performClickInternal(View.java:7129)
	at android.view.View.access$3500(View.java:803)
	at android.view.View$PerformClick.run(View.java:27543)
	at android.os.Handler.handleCallback(Handler.java:883)
	at android.os.Handler.dispatchMessage(Handler.java:100)
	at android.os.Looper.loop(Looper.java:264)
	at android.app.ActivityThread.main(ActivityThread.java:7510)
	at java.lang.reflect.Method.invoke(Native Method)
	at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:492)
	at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:980)