Kill android app

http://stackoverflow.com/questions/2550099/how-to-kill-an-android-activity-when-leaving-it-so-that-it-cannot-be-accessed-fro

http://www.androidcompetencycenter.com/2009/01/android-basics-managing-activity-states-part-i/

http://androidforums.com/application-development/133372-onpause-onstop-problems.html