how to finish two or more activites created by parent activity in android

Question

i am creating an app in which Activity A creates Activity B and Activity A goes to Background and activity B in Foreground..

when back is pressed in activity B then Activity A comes to foreground and Activity B to background.. Now Activity A creates Activity C again Activity A in background and Activity C in foreground.. Ie now C is foreground and activity A,B are in Background

when back is pressed in activity C then Activity A comes to foreground and Activity C to background..

Ie now A is foreground and activity C,B are in Background

now if Back is pressed in Activity A den i should finish All activities ie A,B,C and should close the app...

how to implement this can any one help me out..

Answer 1

This is the default behavior of Android. You don't have to do anything special for this.