Question

Now I have 3 activities, activity1, activity2 and activity3. I open the activities in order and never close any of them. So now I am in activity3, but I want to go back to activity1 and it must be the one which I opened. Is there any way to do that?

Answer 1

start activity 1 from 3 with FLAG_ACTIVITY_CLEAR_TOP flag:

Intent intent = new Intent ( this, Activity1.class );
intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
startActivity(intent);