OnSubscribeSharedPreferenceChange.java 文件源码

@Override
public void call(final Subscriber<? super String> subscriber)
{
    final SharedPreferences.OnSharedPreferenceChangeListener listener = new SharedPreferences.OnSharedPreferenceChangeListener()
    {
        @Override
        public void onSharedPreferenceChanged(SharedPreferences sharedPreferences, String key)
        {
            subscriber.onNext(key);
        }
    };

    subscriber.add(Subscriptions.create(new Action0()
    {
        @Override
        public void call()
        {
            mSharedPreferences.unregisterOnSharedPreferenceChangeListener(listener);
        }
    }));

    mSharedPreferences.registerOnSharedPreferenceChangeListener(listener);
}