How to hide views in android when android app is backgrounded (not to stop android to take snapshot when backgrounded) -

this question has answer here:

• how prevent android taking screenshot when app goes background? 3 answers

i want hide views when app backgrounded. e.g. want hide "live debug mode" textview when app backgrounded.

add following code oncreate:

@override protected void oncreate(bundle savedinstancestate) {     super.oncreate(savedinstancestate);     getwindow().setflags(windowmanager.layoutparams.flag_secure,             windowmanager.layoutparams.flag_secure);     setcontentview(r.layout.activity_main2);     //...rest of code }