Question

I need to create an application that will block applications to connect to internet when a certain threshold has reached. I just like to ask if this app is possible even the user of the app will not root his android phone? I have check droidwall but that app requires rooting the phone.

Answer 1

Fortunately, this is not possible ^(*) but on a rooted phone. Each application is independant of each other and an application A cannot override a permission granted to an application B.

And this is logical as if the user have installed that Application B that was requiring the INTERNET permission, this is not to see an Application A to decide anything else.

^{(*) At least with Android <= 9. I don’t know the newer versions so well but I would be really surprised they bring any change to that principle.}