小编ala*_*hoi的帖子

I'm following this tutorial: https://docs.realm.io/sync/getting-started-1/react-native-quick-start/step-1-query-based-sync#step-4-create-a-constants-file-and-set-the-realm-instance-address

Many documents including this tutorial refers a src folder, but when I create a React Native project with a command like react-native init MyProject, it doesn't create src folder. Why is that?

Following is my folder structure:

??? App.js
??? android
??? app.json
??? index.js
??? ios
??? node_modules
??? package.json
??? yarn.lock

    const [active, setActive] = useState(false);

    const onActiveChanged = useCallback(
      isActive => () => {
        // do something
        setActive(isActive);
      },
      [setActive], // or just [] is okay?
    );

一起使用useState和useCallback（或useMemo）时，是否应将setState依赖项包括在数组中？

ListView如果给出触发器，我想更新 Android 应用程序小部件中的某些项目 a 的布局。所以我getView()在 中的方法中实现了下面的方法RemoteViewsService.RemoteViewsFactory。

public RemoteViews getViewAt(int position) {
    ...
    int remoteViewId;

    if (some condition) {
        remoteViewId = R.layout.highlighted_item;
    } else {
        remoteViewId = R.layout.item;
    }

    RemoteViews rv = new RemoteViews(mContext.getPackageName(), remoteViewId);

此代码在首次加载小部件时有效，但在使用notifyAppWidgetViewDataChanged布局进行更新时仍然存在并且不会更改。如何更新用于 ListView 项目的 xml 布局？