Settings.java 文件源码

public void registerSettingChangeListener(final SettingChangeListener listener) {
    SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(this.context);
    OnSharedPreferenceChangeListener spListener = new OnSharedPreferenceChangeListener() {
        public void onSharedPreferenceChanged(SharedPreferences sharedPreferences, String key) {
            listener.onSettingChanged(Settings.this, key);
        }
    };
    prefs.registerOnSharedPreferenceChangeListener(spListener);
    this.listenerMap.put(listener, spListener);
}