TwoStatePreferenceHelper.java 文件源码

private static void replaceAllCheckBoxPreferencesBySwitchPreferences(
        final PreferenceGroup group) {
    final ArrayList<Preference> preferences = new ArrayList<>();
    final int count = group.getPreferenceCount();
    for (int index = 0; index < count; index++) {
        preferences.add(group.getPreference(index));
    }
    group.removeAll();
    for (int index = 0; index < count; index++) {
        final Preference preference = preferences.get(index);
        if (preference instanceof CheckBoxPreference) {
            addSwitchPreferenceBasedOnCheckBoxPreference((CheckBoxPreference)preference, group);
        } else {
            group.addPreference(preference);
            if (preference instanceof PreferenceGroup) {
                replaceAllCheckBoxPreferencesBySwitchPreferences((PreferenceGroup)preference);
            }
        }
    }
}