title: Adding a button to the default incoming call screen in Android
body: <p>I'm in the process of developing an Android app for which I need to add a button on the incoming call screen. Is it possible to add a new button to the existing incoming call screen or should I create a custom screen specific to my app?</p>
  
  <p>Edit:
  I want to add a button in addition to the Answer and Decline buttons in the screen that appears when there is an incoming call. </p>