Android - Forcing ANR for testing purpose

Question

Why i can\'t force Android ANR with this code? No log messages or pop up. The application is just launched lazily.

[UPDATE]

I can\'t get it even sleeping a V

Answer 1

Make a button in your activity.

public void onBtn1(View v) {
   int a = 0;
   while(true) {
      a++;
   }
}

Make the button execute the above code. Spam click the button with your finger =)