title: Block/Hide incoming calls in Android
body: <p>First of all, let me warn you that i'm a beginner Android programmer.</p>
  
  <p>I'm looking for a way to either block calls entirely or hide the default incoming call screen, i tried using the ITelephony.aidl but it seems that android no longer allows some of the permissions required by some of the methods.</p>
  
  <p>I found this solution <a href="https://stackoverflow.com/a/9462119/2458443">https://stackoverflow.com/a/9462119/2458443</a> but failed to implement it, maybe some one can help me do it or explain the method in a more comprehensive manner.</p>
  
  <p>Thx.</p>