title: Android: how to find out devices' exact pixel aspect ratio programatically?
body: <p>I want to display tiles which are supposed be all squares in my Android app, using OpenGL ES 2.0.</p>
  
  <p>Is it possible for an app that is installed on an Android device to find out the exact aspect ratio of the individual pixels of the device's screen programmatically without any inputs from the user?</p>