is there a default back key(on device) listener in android?

Question

I am having two activities A and B. when i click the button in A that will shows B. when i click the Button in B it backs to A. i had set the overridePendingTransition metho

Answer 1

More info on back key stuff can be found here: http://android-developers.blogspot.com/2009/12/back-and-other-hard-keys-three-stories.html