Finish parent and current activity in Android

Question

I have 3 activities. Activity A which leads to activity B, which in turn can go back to activity A or start activity C. However, if I press back in activity C the app should

Answer 1

You shou use onActivityResult method in your parent Activity

Suppose Activity A is parent of Activity B. If you want to click back button in Activity B to exit Application (also exit Activity A)

In your Activity B, in onStop() or onDestroy()

you call

setResult(0); //any int number is fine

this will pass a result code to its parent activity.

Your parent Actvity A, listens for the result code you will need to use onActivityResult method inside the method you can call

if(resultCode == 0) //matches the result code passed from B
{
    ActivityA.this.finish()
}

It works for me :)