Rx Enable Developer Settings

Observable Button

ObservableButton v = (ObservableButton) findViewById(R.id.button);
v.observeOnClick()
        .skip(3)
        .takeWhileWithIndex(new Func2<ObservableButton.OnClick, Integer, Boolean>() {
            @Override
            public Boolean call(ObservableButton.OnClick onClick, Integer index) {
                int countdown = 3 - index;
                if (countdown > 0) {
                    Toast.makeText(MainActivity.this, "You are now " + countdown + " clicks away from being a developer!", Toast.LENGTH_SHORT).show();
                    return true;
                } else {
                    Toast.makeText(MainActivity.this, "You are now a developer!", Toast.LENGTH_SHORT).show();
                    return false;
                }
            }
        }).subscribe();