SettingsActivity.java 文件源码

@Override
public void onResume() {
    super.onResume();
    //Atribui os valores selecionados
    for (int i = 0; i < getPreferenceScreen().getPreferenceCount(); ++i) {
        Preference preference = getPreferenceScreen().getPreference(i);
        if (preference instanceof PreferenceGroup) {
            PreferenceGroup preferenceGroup = (PreferenceGroup) preference;
            for (int j = 0; j < preferenceGroup.getPreferenceCount(); ++j) {
                updatePreference(preferenceGroup.getPreference(j));
            }
        } else {
            updatePreference(preference);
        }
    }
}