title: How to run cron job in android app which runs in the background and displays clickable notification
body: <p>Is there a way a cron job can be coded to run in the background of an app every few seconds posting a json object (whose values change based on a particular fragment being viewed) to a php server and displays a clickable toast when a particular response is received?</p>
  
  <p>If so how may I go about accomplishing this?   </p>