title: Catch keypress with android
body: <p>How can i catch a phone keypress with the android SDK? i've been looking around for hours without finding anything..</p>
  
  <p>For example:</p>
  
  <p>In some cases, i want to catch the message when a user presses the "hang up" button on the phone, and then discard the message before it reaches the OS.</p>
  
  <p>Is this possible?</p>