title: Android variables retaining values after uninstalling the app
body: <p>I need a way to be able to tell if a user has uninstalled and reinstalled the android application. I use shared preferences for when the user CLOSES the app, however, I need to save out a variable that will let me know if the user has ever opened the app on this device in the past. </p>
  
  <p>(Basically the user is awarded items in the game when first starting the game, after they are used the player could essentially just uninstall and reinstall and use the items again) I need a variable that gets saved in the android registry that will tell me if the player has ever opened the app before (even if they have previously uninstalled).</p>
  
  <p>Is this possible?</p>