title: How to fire event when user enter particular location?
body: <p>Generally to get the user current location periodically, we make Thread and write code to getCurrentLocation or we set repeat event in alarm manager.</p>
  
  <p>I want when user enter in particular region, app should trigger event like prompt dialog to user that he is now near to me.</p>
  
  <p>With above both approach, app unnecessarily tries to check whether user's current location matching defined location.</p>
  
  <p>Is there any way by that system automatically fire event when user enter or exist particular region?</p>