Intercepting the back button.

Question

I'm writing an application which will have two Activities, when the user presses the back button on the second activity a dialog should pop up asking the user to confirm the action. So how do I intercept this? I seriously doubt about this coz the backstack is a part of the OS itself. Has anyone found a workaround?

Answer 1

Simply override the onKeyDown method in your activity and look for the back button. Return true so that the event is consumed.

public boolean onKeyDown(int keyCode, KeyEvent event) {
    if (keyCode == KeyEvent.KEYCODE_BACK) {
        //Do something here
        return true;
    }
    return super.onKeyDown(keyCode, event);
}

Answer 2

In an activity you can just override

onBackPressed()

edit: that is api lvl 5+ :/ for 4 and below you gotta override onKeyDown()