title: Android - notification when field in database changes
body: <p>I am pretty new to programming.
  I am making an application for android that gets data about events from database, users may add new events, but they have "status" set as 0, so I have to change them in phpmyadmin to 1 to make them show as listviews in MainActivity. Everything's done via php and json.
  I want to make some sort of notifications, when a new event gets it's status changed to 1 in database then notification is send to all people who have the application. What is the best approach? Did I describe everything clearly?
  I was looking through the internet and found something about GCM, but I am lost and I don't know where to start. Do you have perhaps some tutorial to achieve what I want?</p>