Question

How to present an empty view in flutter as Widget.build cannot return null to indicate that there is nothing to render.

Answer 1

In Flutter, you can present an empty view by returning an empty Container widget or any other widget that has no child elements. This will render an empty view on the screen.

For example:

Widget build(BuildContext context) {
  // some logic to determine if there is data to render
  if (data.isNotEmpty) {
    // render data
    return ListView.builder(
      itemCount: data.length,
      itemBuilder: (context, index) {
        return ListTile(
          title: Text(data[index].title),
          subtitle: Text(data[index].subtitle),
        );
      },
    );
  } else {
    // render empty view
    return Container();
  }
}

In this example, if the data list is not empty, a ListView is returned with the data items rendered as ListTiles. If the data list is empty, an empty Container widget is returned, which will render an empty view on the screen.

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