What pattern should I use for a notification app?

Question

Android

Let's say there is an application with activity A, and activity C.
Main A.
Activity C is called by clicking on a notification in the notification area.
The user does something in activity C and exits it by onBackPressed()
Now the need to access C disappears, moreover, the user should not get there.
But if you open the list of recently opened activities, it will have C, which will open.
Question:
How to make access to C blocked or closed without a trace?

Answer 1

stackoverflow.com/questions/1898886/removing-an-ac...