title: how to detect non human touch on screen
body: <p>I am creating an weight measuring app for android for that
  I want to detect a <code>non human touch</code> on <code>android screen</code> so that by measuring its pressure i will be able to detect the weight of the object placed on screen but the problem is <code>capicitive screen</code> of android are detecting only <code>human touch</code> .</p>
  
  <p>please help</p>