如何在Flutter中增加GridView中的索引？

import 'package:flutter/material.dart';

void main() {
  runApp(MyApp());
}

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        appBar: AppBar(
          title: Text('GridView with Index'),
        ),
        body: GridView.builder(
          itemCount: 10, // 假设有10个子项
          gridDelegate: SliverGridDelegateWithFixedCrossAxisCount(
            crossAxisCount: 2, // 每行显示2个子项
          ),
          itemBuilder: (BuildContext context, int index) {
            List<int> indexList = List.generate(10, (index) => index); // 创建索引列表
            int itemIndex = indexList[index]; // 获取当前子项的索引值

            return GridTile(
              child: Container(
                color: Colors.blue,
                child: Center(
                  child: Text(
                    'Item $itemIndex',
                    style: TextStyle(
                      color: Colors.white,
                      fontSize: 20,
                    ),
                  ),
                ),
              ),
            );
          },
        ),
      ),
    );
  }
}