小编Oja*_*ngh的帖子

我正在尝试制作一个如图所示的单选按钮 但我无法将单选按钮的半径更改为这个大小。有什么办法可以增加单选按钮的大小吗？

我已将单选按钮放在卡片小部件上，并在单击提交按钮时更改了卡片小部件的高度。但我无法更改单选按钮的大小。这是我尝试过的代码

import 'package:flutter/material.dart';

void main() => runApp(MyApp());

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Demo',
      debugShowCheckedModeBanner: false,
      theme: ThemeData(
        primarySwatch: Colors.blue,
      ),
      home: MyHomePage(title: 'Flutter Demo Home Page'),
    );
  }
}

class MyHomePage extends StatefulWidget {
  MyHomePage({Key key, this.title}) : super(key: key);
  final String title;
  @override
  _MyHomePageState createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
  String question = 'Q 1', answer = 'A 3', defaultValue = 'nil';
  List<String> options = …