title: setting interval distance for notifications in requestLocationUpdate in android
body: <p><code>requestLocationUpdate</code> allows one to set the interval distance for notifications.</p>
  
  <p>Does anyone know how this works?</p>
  
  <p>I mean, does the manager location simply screen out unwanted changes?</p>
  
  <p>Or does it use an android utility to detect if the device has moved, and by doing so using less battery. </p>
  
  <p>Thanks.</p>