Flutter Radio | RadioListTile

Flutter Radio is commonly used to select options like gender (male/female), etc. below we have used two cases which commonly used in flutter applications

import 'package:flutter/cupertino.dart';
import 'package:flutter/material.dart';

class MyHomePage extends StatefulWidget {
  const MyHomePage({super.key, required this.title});
  final String title;
  @override
  State<MyHomePage> createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {

  int selectedRadio = 0;

  setSelectedRadio(int val) {
    setState(() {
      selectedRadio = val;
    });
  }
  List<String> items = ['Option 1', 'Option 2', 'Option 3', 'Option 4'];
  String selectedOption = '';

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('Flutter Radio Button Example'),
      ),
      body: Column(
        children: [

// Case1

          RadioListTile(
            value: 0,
            groupValue: selectedRadio,
            onChanged: (val) {
              setSelectedRadio(val!);
            },
            title: Text('Radio 1'),
          ),
          RadioListTile(
            value: 1,
            groupValue: selectedRadio,
            onChanged: (val) {
              setSelectedRadio(val!);
            },
            title: Text('Radio 2'),
          ),
          RadioListTile(
            value: 2,
            groupValue: selectedRadio,
            onChanged: (val) {
              setSelectedRadio(val!);
            },
            title: Text('Radio 3'),
          ),
          SizedBox(height: 16.0),
          Text('Selected Radio>>>>>: $selectedRadio'),
          

//case2
          for (String item in items)
            RadioListTile<String>(
              title: Text(item),
              value: item,
              groupValue: selectedOption,
              onChanged: (value) {
                setState(() {
                  selectedOption = value!;
                });
              },
            ),
          SizedBox(height: 20),
          Text('Selected Option: $selectedOption', style: TextStyle(fontSize: 16)),
        ],
      ),
    );
  }
}