Le Widget RadioListTile dans Flutter

RadioListTile(
  title: const Text('Option 1'),
  value: 1,
  groupValue: selectedValue,
  onChanged: (value) {
    setState(() {
      selectedValue = value;
    });
  },
),

import 'package:flutter/material.dart';

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

/// Main application widget
class MyApp extends StatelessWidget {
  const MyApp({Key? key}) : super(key: key);

  static const String _title = 'Flutter Application';

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: _title,
      home: Scaffold(
        appBar: AppBar(title: const Text(_title)),
        body: const MyStatefulWidget(),
      ),
    );
  }
}

/// Stateful widget that the main application instantiates
class MyStatefulWidget extends StatefulWidget {
  const MyStatefulWidget({Key? key}) : super(key: key);

  @override
  State createState() => _MyStatefulWidgetState();
}

/// Private State class that goes with MyStatefulWidget
class _MyStatefulWidgetState extends State {
  int selectedValue = 0;

  @override
  Widget build(BuildContext context) {
    return Center(
      child: Column(
        children: [
          const SizedBox(height: 30,),
          RadioListTile(
            title: const Text('Option 1'),
            value: 1,
            groupValue: selectedValue,
            onChanged: (value) {
              setState(() {
                selectedValue = value!;
              });
            },
          ),
          RadioListTile(
            title: const Text('Option 2'),
            value: 2,
            groupValue: selectedValue,
            onChanged: (value) {
              setState(() {
                selectedValue = value!;
              });
            },
          ),
        ],
      ),
    );
  }
}

import 'package:flutter/material.dart';

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

/// Main application widget
class MyApp extends StatelessWidget {
  const MyApp({Key? key}) : super(key: key);

  static const String _title = 'Flutter Application';

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: _title,
      home: Scaffold(
        appBar: AppBar(title: const Text(_title)),
        body: const MyStatefulWidget(),
      ),
    );
  }
}

/// Stateful widget that the main application instantiates
class MyStatefulWidget extends StatefulWidget {
  const MyStatefulWidget({Key? key}) : super(key: key);

  @override
  State createState() => _MyStatefulWidgetState();
}

/// Private State class that goes with MyStatefulWidget
class _MyStatefulWidgetState extends State {
  String? selectedFruit;

  @override
  Widget build(BuildContext context) {
    return Center(
      child: Column(
        children: [
          RadioListTile(
            title: const Text('Pomme'),
            value: 'Pomme',
            groupValue: selectedFruit,
            onChanged: (String? value) {
              setState(() {
                selectedFruit = value;
              });
            },
          ),
          RadioListTile(
            title: const Text('Banane'),
            value: 'Banane',
            groupValue: selectedFruit,
            onChanged: (String? value) {
              setState(() {
                selectedFruit = value;
              });
            },
          ),
          RadioListTile(
            title: const Text('Cerise'),
            value: 'Cerise',
            groupValue: selectedFruit,
            onChanged: (String? value) {
              setState(() {
                selectedFruit = value;
              });
            },
          ),
        ],
      ),
    );
  }
}