title: Android: How to shut down the Program completely?
body: <p>I have a program with several activities. One can start activity B from clicking on a button in Activity A, and can start C from clicking on a button in B, and so on. In short A->B->C->D->E.</p>
  
  <p>If i click the button "Exit" in Activity E, i want to shut down my whole program, in another word, i want to finish all of the activities. How can i do it?</p>
  
  <p>Thanks a lot!</p>