AsyncSharedPrefs.java 文件源码

@Override
public void onSharedPreferenceChanged(SharedPreferences sharedPreferences, String key) {
    Set<OnSharedPreferenceChangeListener> listeners = new HashSet<OnSharedPreferenceChangeListener>();
    synchronized (this) {
        if (prefs.contains(key)) {
            mMap.put(key, sharedPreferences.getAll().get(key));
        } else {
            mMap.remove(key);
        }
        listeners.addAll(mListeners.keySet());
    }
    for (OnSharedPreferenceChangeListener listener : listeners) {
        if (listener != null) {
            listener.onSharedPreferenceChanged(this, key);
        }
    }
}