Android listpreferences, how to save individual preference

Question

I have some list preferences, but I don't know how to save the individual values from the list. How do I do it? Here is what I have

http://i41.tinypic.com/dh4gvo.png

    Preference customPref = (Preference) findPreference("notificationPref");
    customPref.setOnPreferenceClickListener(new OnPreferenceClickListener() {

        public boolean onPreferenceClick(Preference preference) {

            SharedPreferences customSharedPreference = getSharedPreferences(
                    "notifications", Activity.MODE_PRIVATE);
            SharedPreferences.Editor editor = customSharedPreference
                    .edit();
            editor.putString("notification",
                    "The preference has been clicked");
            editor.commit();
            return true;
        }

    });

my list click listener is only for the main item in the list preferences page, but not the items in the popup itself. How do I save the choice selected in the popup itself?