title: Android - how to check if in app purchase has already been done?
body: <p>How do i check if a in app purchase has been done before?
  So that my user doesnt need to repurchase the in app purchase upon uninstalling and reinstalling the app?</p>
  
  <p>I have set my in app item to managable in the android market publish page.</p>
  
  <p>i have read about <code>RESTORE_TRANSACTION</code> but I do not know what i need to look for inside this response and also how to test this.</p>
  
  <p>Any help would be greatly appreaciated.</p>