title: Android : Backstack behavior with 2 running application
body: <p>If i have two application first "APP1" with "3 activity(A1 , A2 , A3)" and second "APP2" with "4 activity(B1 , B2 , B3, B4)".How will the backstack store these activity if i do this. Launch APP1 - A1 -A2 - HOME BUTTON - Launch APP2 - B1 - B2 - HOME BUTTON - LAUNCH APP1 - A3.  Can anyone explain the stack contains.  </p>