title: how to send notifications from a website to an android app
body: <p>I have made a website in html using a bit of javascript and php.
  I have made an android application using eclipse and java.
  what code or software or technique do i need to employ to allow my website to send notifications to my applications. And eventually send notifications from my app back to my website. </p>
  
  <p>the aim one day is to send notifications from my website to a specific app on a specific android device.</p>
  
  <p>Please answer my question or provide links to a solution. and excuse my ignorance as i am new to this.</p>