Android : Invoke a listener in a specified function

I have a preferenceListener in which i listen to changes in the preference

preferenceListener = new OnSharedPreferenceChangeListener() {
            @Override
            public void onSharedPreferenceChanged(
                    SharedPreferences sharedPreferences, String key) {
                if (key.equals(SettingsActivity.CAR)
                         { }

                } 

             }
        };

But i want to invoke this listener in onResume() only. Means if the activity goes into onResume() and my preference is changed, then only i want to invoke this listener. How to achive this?