https://commportal-external-alb-2045176994.us-west-2.elb.amazonaws.com/2013/11/spooktacular-halloween-elearning-tips-tricks/popupwindow/
popupWindow - eLearning
elearning
https://developer.android.com/reference/android/widget/PopupWindow.OnDismissListener
PopupWindow.OnDismissListener | API reference | Android Developers
api referenceandroiddevelopers