上效果图

上代码：

import 'package:flutter/material.dart';class ListRoles extends StatelessWidget {ListRoles({super.key});final List<String> entries = <String>['+', '-', '*', '/'];final List<int> colorCodes = <int>[600, 500, 100, 50];@overrideWidget build(BuildContext context) {return ListView.builder(padding: const EdgeInsets.all(8),itemCount: entries.length,itemBuilder: (BuildContext context, int index) {return Container(height: 50,color: Colors.amber[colorCodes[index]],child: Center(child: Text('Entry ${entries[index]}'),),);});}
}

还是官网例子蛤！！！

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