title: How to restart the application when a sub activity start from recent list in android
body: <p>My app has two activities. 
     When launching app with touching app icon, main activity starts. And go to sub activity then press home button. Then Kill app using task Killer. It is a point that I want restart app when user select app from recent list, but app starts from subactivity.</p>
  
  <p>Does Anyone know how to solve this problem?</p>