how to finish all activities and close the application in android?

Question

My application has the following flow:

Home->screen 1->screen 2->screen 3->screen 4->screen 5>Home->screen 2->Home->Screen 3

My problem is that when I am try

Answer 1

Use finishAffinity() method that will finish the current activity and all parent activities. But it works only for API 16+ mean Android 4.1 or higher.

API 16+ use:

finishAffinity();

Below API 16 use:

ActivityCompat.finishAffinity(this); //with v4 support library

To exit whole app:

finishAffinity(); // Close all activites
System.exit(0);  // Releasing resources