title: Is there a way to detect when the user has changed the clock time on their device?
body: <p>Is there a way to detect when the Android system clock has been reset <strong>by the user</strong> in Android?</p>
  
  <p>I'm designing an app which uses system time to determine when a user is at a certain place at a certain time, and I don't want to rely on network availability at that point.  Obviously it would therefore be good to know when the user has changed the system clock, so they can't "cheat".</p>