Exit/Finish an app/activity - android

Question

I\'ve got 4 activities say Act1, Act2, Act3 and Act4. A button in Act1 opens Act2, a button in Act2 opens Act3, a button in A

Answer 1

finish previous activity when you are go to the next activity means write finish(); after startactivity(intent); and write below code for start first activity from fourth activity's button click event.

Intent in1=new Intent(Act4.this, Act1.class);
startActivity(in1);
finish();

And Write Below Code on Your Exit Button's Click event in all activities.

finish();