SettingsFragment.java 文件源码

/**
 * On resume it update every settings.
 */
@Override
public void onResume() {
    super.onResume();
    getPreferenceManager().getSharedPreferences().registerOnSharedPreferenceChangeListener(this);
    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);
        }
    }

}