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

I used this code for force ANR

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
    }

    public void force(View view){
        while(true) {}
    }

I just created a simple button in the xml file and set android:onClick=force