android - How to clear previous activity stack and Exit Application on back button? -

friends,

i have 3 activities

a,b,c

a home screen.

activities launched follow a->b->c

if come home screen using backbutton want clear activity stack/previous activities history , should exit application.

any 1 guide me how achieve this?

very simple: use intent.setflags(intent.flag_activity_clear_top); on intent used start activity a.