设置的内容观察者。Global不适用于UserHandle以外的用户id。USER\u所有者(0)

我的片段中有一个ContentObserver,它观察到设置中的一些数据更改。全球的:

private ContentObserver mObserver = null;
private Context mContext = null;

......

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
        Bundle savedInstanceState) {

    mContext = getActivity();

    ......

    mObserver = new MyObserver(new Handler());
    Uri uri = Settings.Global.getUriFor(Settings.Global.xxx);
    mContext.getContentResolver().registerContentObserver(uri, true, mObserver);

    ......
}

......

@Override
public void onDestroyView() {

    if (mObserver != null) {
        mContext.getContentResolver().unregisterContentObserver(mObserver);
        mObserver = null;
    }
}

class MyObserver extends ContentObserver {
    MyObserver(Handler handler) {
        super(handler);
    }

    @Override
    public void onChange(boolean selfChange) {
        // do something
    }
}

有什么想法吗?