private void flattenPreferenceGroup(List<Preference> preferences, PreferenceGroup group) { group.sortPreferences(); final int groupSize = group.getPreferenceCount(); for (int i = 0; i < groupSize; i++) { final Preference preference = group.getPreference(i); preferences.add(preference); addPreferenceClassName(preference); if (preference instanceof PreferenceGroup) { final PreferenceGroup preferenceAsGroup = (PreferenceGroup) preference; if (preferenceAsGroup.isOnSameScreenAsChildren()) { flattenPreferenceGroup(preferences, preferenceAsGroup); } } preference.setOnPreferenceChangeInternalListener(this); } }