ListView总是使children覆盖父宽度。因此，根据您的要求，您可以删除Row上的Container，并使用Text Package 相同的Container，如下所示。

ListView.builder(
  itemCount: 5,
  shrinkWrap: true,
  itemBuilder: (context, index) {
    return Row(
      mainAxisSize: MainAxisSize.min,
      children: [
        Container(
            color: Colors.grey,
            margin: const EdgeInsets.all(2),child: Text(index.toString())),
      ],
    );
  },
)

The Container widget that wraps the Row widget also needs to have its height set to the minimum required height of the Row. You can achieve this by setting the height property of the Container widget to null or double.infinity.

return ListView.builder(
  itemCount: 5,
  shrinkWrap: true,
  itemBuilder: (context, index) {
    return Container(
      color: Colors.grey,
      margin: const EdgeInsets.all(2),
      height: null, // or height: double.infinity
      child: Row(
        mainAxisSize: MainAxisSize.min,
        children: [
          Text(index.toString()),
        ],
      ),
    );
  },
);

With this change, the Row widget will be able to shrink to its minimum size, and the ListView widget will adjust its height accordingly.