Flutter :正确查看嵌套列表数据:已编辑#2

ListView.builder(
  itemCount: parentList.length,
  itemBuilder: (BuildContext context, int parentIndex) {
    return ExpansionTile(
      title: Text(parentList[parentIndex].title),
      children: <Widget>[
        ListView.builder(
          shrinkWrap: true,
          physics: ClampingScrollPhysics(),
          itemCount: parentList[parentIndex].childList.length,
          itemBuilder: (BuildContext context, int childIndex) {
            return ListTile(
              title: Text(parentList[parentIndex].childList[childIndex]),
            );
          },
        ),
      ],
    );
  },
)