Are the 4 Android buttons standard? Ex. back button, menu button

Question

Are the physical buttons that Android phones come with standard? Specifically the back, menu, home, and search button? In my applications I assume everyone has a back button

Answer 1

If you are developing specifically for the android the back button is standard. The only other thing you could do is within the menu add a 'back' option, but it is redundant at best.