How do apps that impose a login password on other apps work?

Question

Android

Who can explain in detail how app locers work? Do they just catch the opening of the necessary applications and show their interface or embed their functionality into them? Do they need administrator rights, is it possible to open a blocked application if not opened directly, but, let's say, through a third-party application, and most importantly, is it possible to somehow disable the blocking that such applications impose?

Answer 1

eighth link in search
https://stackoverflow.com/questions/45075728/how-d...