title: Send data from server to android application
body: <p>What is the best manner in which to send data to an android device from a server from an android application? My current setup:</p>
  
  <p>Postgresql database --> program running on server machine --> android device. </p>
  
  <p>I currently am using a custom protocol, but I would ultimately like to make my data source available to the app development community at large. As such, I would like to know the best and most simple options by which I can serve this data.   </p>