NotificationLightSettings.java 文件源码

private void setChildrenStarted(PreferenceGroup group, boolean started) {
    final int count = group.getPreferenceCount();
    for (int i = 0; i < count; i++) {
        Preference pref = group.getPreference(i);
        if (pref instanceof ApplicationLightPreference) {
            ApplicationLightPreference ap = (ApplicationLightPreference) pref;
            if (started) {
                ap.onStart();
            } else {
                ap.onStop();
            }
        } else if (pref instanceof PreferenceGroup) {
            setChildrenStarted((PreferenceGroup) pref, started);
        }
    }
}