title: how to measure HeartBeat using an android device
body: <p>My question is very simple and straight forward. Is there any technique through which i can calculate the heartbeat of a person using android device.  </p>
  
  <p>I googled it and found some results in which they implemented it using camera.  </p>
  
  <p>Any other idea or help will be highly appreciated.</p>
  
  <p>Thanks.</p>