android - 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

In an activity you can just override

onBackPressed()

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