How to quit android application programmatically

Question

I Found some codes for quit an Android application programatically. By calling any one of the following code in onDestroy() will it quit application entirely?

Answer 1

The easiest way I found to quit an application from an activity, without breaking Android's logic and without adding more code in existing activities and passing extras is the following:

public static void quitApplication (Activity currentActivity) {
    Intent intent = new Intent (currentActivity, QuitApplicationActivity.class);
    intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_CLEAR_TASK | Intent.FLAG_ACTIVITY_CLEAR_TOP);

    currentActivity.startActivity (intent);
    currentActivity.finish ();
}

the QuitApplicationActivity being:

public class QuitApplicationActivity extends AppCompatActivity {

    @Override
    protected void onCreate (Bundle savedInstanceState) {
        super.onCreate (savedInstanceState);

        finish ();
    }
}