Add Material 3 RadioListTile example and update existing examples (#119716)

* Add Material 3 `RadioListTile` example and update existing examples

* Update examples with `useMaterial3: true` and update example descriptions.

* add a `ColorScheme` colour

examples/api/lib/material/radio_list_tile/custom_labeled_radio.0.dart

@@ -0,0 +1,118 @@
+// Copyright 2014 The Flutter Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// Flutter code sample for custom labeled radio.
+
+import 'package:flutter/gestures.dart';
+
+import 'package:flutter/material.dart';
+
+void main() => runApp(const LabeledRadioApp());
+
+class LabeledRadioApp extends StatelessWidget {
+  const LabeledRadioApp({super.key});
+
+  @override
+  Widget build(BuildContext context) {
+    return MaterialApp(
+      theme: ThemeData(useMaterial3: true),
+      home: Scaffold(
+        appBar: AppBar(title: const Text('Custom Labeled Radio Sample')),
+        body: const LabeledRadioExample(),
+      ),
+    );
+  }
+}
+
+class LinkedLabelRadio extends StatelessWidget {
+  const LinkedLabelRadio({
+    super.key,
+    required this.label,
+    required this.padding,
+    required this.groupValue,
+    required this.value,
+    required this.onChanged,
+  });
+
+  final String label;
+  final EdgeInsets padding;
+  final bool groupValue;
+  final bool value;
+  final ValueChanged<bool> onChanged;
+
+  @override
+  Widget build(BuildContext context) {
+    return Padding(
+      padding: padding,
+      child: Row(
+        children: <Widget>[
+          Radio<bool>(
+            groupValue: groupValue,
+            value: value,
+            onChanged: (bool? newValue) {
+              onChanged(newValue!);
+            },
+          ),
+          RichText(
+            text: TextSpan(
+              text: label,
+              style: TextStyle(
+                color: Theme.of(context).colorScheme.primary,
+                decoration: TextDecoration.underline,
+              ),
+              recognizer: TapGestureRecognizer()
+                ..onTap = () {
+                  debugPrint('Label has been tapped.');
+                },
+            ),
+          ),
+        ],
+      ),
+    );
+  }
+}
+
+class LabeledRadioExample extends StatefulWidget {
+  const LabeledRadioExample({super.key});
+
+  @override
+  State<LabeledRadioExample> createState() => _LabeledRadioExampleState();
+}
+
+class _LabeledRadioExampleState extends State<LabeledRadioExample> {
+  bool _isRadioSelected = false;
+
+  @override
+  Widget build(BuildContext context) {
+    return Scaffold(
+      body: Column(
+        mainAxisAlignment: MainAxisAlignment.center,
+        children: <Widget>[
+          LinkedLabelRadio(
+            label: 'First tappable label text',
+            padding: const EdgeInsets.symmetric(horizontal: 5.0),
+            value: true,
+            groupValue: _isRadioSelected,
+            onChanged: (bool newValue) {
+              setState(() {
+                _isRadioSelected = newValue;
+              });
+            },
+          ),
+          LinkedLabelRadio(
+            label: 'Second tappable label text',
+            padding: const EdgeInsets.symmetric(horizontal: 5.0),
+            value: false,
+            groupValue: _isRadioSelected,
+            onChanged: (bool newValue) {
+              setState(() {
+                _isRadioSelected = newValue;
+              });
+            },
+          ),
+        ],
+      ),
+    );
+  }
+}

examples/api/lib/material/radio_list_tile/custom_labeled_radio.1.dart

@@ -2,24 +2,22 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-// Flutter code sample for [RadioListTile].
+// Flutter code sample for custom labeled radio.
 
 import 'package:flutter/material.dart';
 
-void main() => runApp(const MyApp());
+void main() => runApp(const LabeledRadioApp());
 
-class MyApp extends StatelessWidget {
+class LabeledRadioApp extends StatelessWidget {
-  const MyApp({super.key});
+  const LabeledRadioApp({super.key});
-
-  static const String _title = 'Flutter Code Sample';
 
   @override
   Widget build(BuildContext context) {
     return MaterialApp(
-      title: _title,
+      theme: ThemeData(useMaterial3: true),
       home: Scaffold(
-        appBar: AppBar(title: const Text(_title)),
+        appBar: AppBar(title: const Text('Custom Labeled Radio Sample')),
-        body: const MyStatefulWidget(),
+        body: const LabeledRadioExample(),
       ),
     );
   }
@@ -68,14 +66,14 @@ class LabeledRadio extends StatelessWidget {
   }
 }
 
-class MyStatefulWidget extends StatefulWidget {
+class LabeledRadioExample extends StatefulWidget {
-  const MyStatefulWidget({super.key});
+  const LabeledRadioExample({super.key});
 
   @override
-  State<MyStatefulWidget> createState() => _MyStatefulWidgetState();
+  State<LabeledRadioExample> createState() => _LabeledRadioExampleState();
 }
 
-class _MyStatefulWidgetState extends State<MyStatefulWidget> {
+class _LabeledRadioExampleState extends State<LabeledRadioExample> {
   bool _isRadioSelected = false;
 
   @override

examples/api/lib/material/radio_list_tile/radio_list_tile.0.dart

@@ -6,20 +6,18 @@
 
 import 'package:flutter/material.dart';
 
-void main() => runApp(const MyApp());
+void main() => runApp(const RadioListTileApp());
 
-class MyApp extends StatelessWidget {
+class RadioListTileApp extends StatelessWidget {
-  const MyApp({super.key});
+  const RadioListTileApp({super.key});
-
-  static const String _title = 'Flutter Code Sample';
 
   @override
   Widget build(BuildContext context) {
     return MaterialApp(
-      title: _title,
+      theme: ThemeData(useMaterial3: true),
       home: Scaffold(
-        appBar: AppBar(title: const Text(_title)),
+        appBar: AppBar(title: const Text('RadioListTile Sample')),
-        body: const MyStatefulWidget(),
+        body: const RadioListTileExample(),
       ),
     );
   }
@@ -27,14 +25,14 @@ class MyApp extends StatelessWidget {
 
 enum SingingCharacter { lafayette, jefferson }
 
-class MyStatefulWidget extends StatefulWidget {
+class RadioListTileExample extends StatefulWidget {
-  const MyStatefulWidget({super.key});
+  const RadioListTileExample({super.key});
 
   @override
-  State<MyStatefulWidget> createState() => _MyStatefulWidgetState();
+  State<RadioListTileExample> createState() => _RadioListTileExampleState();
 }
 
-class _MyStatefulWidgetState extends State<MyStatefulWidget> {
+class _RadioListTileExampleState extends State<RadioListTileExample> {
   SingingCharacter? _character = SingingCharacter.lafayette;
 
   @override

examples/api/lib/material/radio_list_tile/radio_list_tile.1.dart

@@ -4,113 +4,73 @@
 
 // Flutter code sample for [RadioListTile].
 
-import 'package:flutter/gestures.dart';
-
 import 'package:flutter/material.dart';
 
-void main() => runApp(const MyApp());
+void main() => runApp(const RadioListTileApp());
 
-class MyApp extends StatelessWidget {
+class RadioListTileApp extends StatelessWidget {
-  const MyApp({super.key});
+  const RadioListTileApp({super.key});
-
-  static const String _title = 'Flutter Code Sample';
 
   @override
   Widget build(BuildContext context) {
     return MaterialApp(
-      title: _title,
+      theme: ThemeData(useMaterial3: true),
-      home: Scaffold(
+      home: const RadioListTileExample(),
-        appBar: AppBar(title: const Text(_title)),
-        body: const MyStatefulWidget(),
-      ),
     );
   }
 }
 
-class LinkedLabelRadio extends StatelessWidget {
+enum Groceries { pickles, tomato, lettuce }
-  const LinkedLabelRadio({
-    super.key,
-    required this.label,
-    required this.padding,
-    required this.groupValue,
-    required this.value,
-    required this.onChanged,
-  });
 
-  final String label;
+class RadioListTileExample extends StatefulWidget {
-  final EdgeInsets padding;
+  const RadioListTileExample({super.key});
-  final bool groupValue;
-  final bool value;
-  final ValueChanged<bool> onChanged;
 
   @override
-  Widget build(BuildContext context) {
+  State<RadioListTileExample> createState() => _RadioListTileExampleState();
-    return Padding(
-      padding: padding,
-      child: Row(
-        children: <Widget>[
-          Radio<bool>(
-              groupValue: groupValue,
-              value: value,
-              onChanged: (bool? newValue) {
-                onChanged(newValue!);
-              }),
-          RichText(
-            text: TextSpan(
-              text: label,
-              style: const TextStyle(
-                color: Colors.blueAccent,
-                decoration: TextDecoration.underline,
-              ),
-              recognizer: TapGestureRecognizer()
-                ..onTap = () {
-                  debugPrint('Label has been tapped.');
-                },
-            ),
-          ),
-        ],
-      ),
-    );
-  }
 }
 
-class MyStatefulWidget extends StatefulWidget {
+class _RadioListTileExampleState extends State<RadioListTileExample> {
-  const MyStatefulWidget({super.key});
+  Groceries? _groceryItem = Groceries.pickles;
-
-  @override
-  State<MyStatefulWidget> createState() => _MyStatefulWidgetState();
-}
-
-class _MyStatefulWidgetState extends State<MyStatefulWidget> {
-  bool _isRadioSelected = false;
 
   @override
   Widget build(BuildContext context) {
     return Scaffold(
+      appBar: AppBar(title: const Text('RadioListTile Sample')),
       body: Column(
-        mainAxisAlignment: MainAxisAlignment.center,
         children: <Widget>[
-          LinkedLabelRadio(
+          RadioListTile<Groceries>(
-            label: 'First tappable label text',
+            value: Groceries.pickles,
-            padding: const EdgeInsets.symmetric(horizontal: 5.0),
+            groupValue: _groceryItem,
-            value: true,
+            onChanged: (Groceries? value) {
-            groupValue: _isRadioSelected,
-            onChanged: (bool newValue) {
               setState(() {
-                _isRadioSelected = newValue;
+                _groceryItem = value;
               });
             },
+            title: const Text('Pickles'),
+            subtitle: const Text('Supporting text'),
           ),
-          LinkedLabelRadio(
+          RadioListTile<Groceries>(
-            label: 'Second tappable label text',
+            value: Groceries.tomato,
-            padding: const EdgeInsets.symmetric(horizontal: 5.0),
+            groupValue: _groceryItem,
-            value: false,
+            onChanged: (Groceries? value) {
-            groupValue: _isRadioSelected,
-            onChanged: (bool newValue) {
               setState(() {
-                _isRadioSelected = newValue;
+                _groceryItem = value;
               });
             },
+            title: const Text('Tomato'),
+            subtitle: const Text('Longer supporting text to demonstrate how the text wraps and the radio is centered vertically with the text.'),
+          ),
+          RadioListTile<Groceries>(
+            value: Groceries.lettuce,
+            groupValue: _groceryItem,
+            onChanged: (Groceries? value) {
+              setState(() {
+                _groceryItem = value;
+              });
+            },
+            title: const Text('Lettuce'),
+            subtitle: const Text("Longer supporting text to demonstrate how the text wraps and how setting 'RadioListTile.isThreeLine = true' aligns the radio to the top vertically with the text."),
+            isThreeLine: true,
           ),
         ],
       ),

examples/api/lib/material/radio_list_tile/radio_list_tile.toggleable.0.dart

@@ -6,33 +6,31 @@
 
 import 'package:flutter/material.dart';
 
-void main() => runApp(const MyApp());
+void main() => runApp(const RadioListTileApp());
 
-class MyApp extends StatelessWidget {
+class RadioListTileApp extends StatelessWidget {
-  const MyApp({super.key});
+  const RadioListTileApp({super.key});
-
-  static const String _title = 'Flutter Code Sample';
 
   @override
   Widget build(BuildContext context) {
     return MaterialApp(
-      title: _title,
+      theme: ThemeData(useMaterial3: true),
       home: Scaffold(
-        appBar: AppBar(title: const Text(_title)),
+        appBar: AppBar(title: const Text('RadioListTile.toggleable Sample')),
-        body: const MyStatefulWidget(),
+        body: const RadioListTileExample(),
       ),
     );
   }
 }
 
-class MyStatefulWidget extends StatefulWidget {
+class RadioListTileExample extends StatefulWidget {
-  const MyStatefulWidget({super.key});
+  const RadioListTileExample({super.key});
 
   @override
-  State<MyStatefulWidget> createState() => _MyStatefulWidgetState();
+  State<RadioListTileExample> createState() => _RadioListTileExampleState();
 }
 
-class _MyStatefulWidgetState extends State<MyStatefulWidget> {
+class _RadioListTileExampleState extends State<RadioListTileExample> {
   int? groupValue;
   static const List<String> selections = <String>[
     'Hercules Mulligan',

examples/api/test/material/radio_list_tile/custom_labeled_radio.0_test.dart

@@ -0,0 +1,43 @@
+// Copyright 2014 The Flutter Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import 'package:flutter/material.dart';
+import 'package:flutter_api_samples/material/radio_list_tile/custom_labeled_radio.0.dart' as example;
+import 'package:flutter_test/flutter_test.dart';
+
+void main() {
+  testWidgets('LinkedLabelRadio contains RichText and Radio', (WidgetTester tester) async {
+    await tester.pumpWidget(
+      const example.LabeledRadioApp(),
+    );
+
+    // Label text is in a RichText widget with the correct text.
+    final RichText richText = tester.widget(find.byType(RichText).first);
+    expect(richText.text.toPlainText(), 'First tappable label text');
+
+    // First Radio is initially unchecked.
+    Radio<bool> radio = tester.widget(find.byType(Radio<bool>).first);
+    expect(radio.value, true);
+    expect(radio.groupValue, false);
+
+    // Last Radio is initially checked.
+    radio = tester.widget(find.byType(Radio<bool>).last);
+    expect(radio.value, false);
+    expect(radio.groupValue, false);
+
+    // Tap the first radio.
+    await tester.tap(find.byType(Radio<bool>).first);
+    await tester.pump();
+
+    // First Radio is now checked.
+    radio = tester.widget(find.byType(Radio<bool>).first);
+    expect(radio.value, true);
+    expect(radio.groupValue, true);
+
+    // Last Radio is now unchecked.
+    radio = tester.widget(find.byType(Radio<bool>).last);
+    expect(radio.value, false);
+    expect(radio.groupValue, true);
+  });
+}

examples/api/test/material/radio_list_tile/custom_labeled_radio.1_test.dart

@@ -0,0 +1,39 @@
+// Copyright 2014 The Flutter Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import 'package:flutter/material.dart';
+import 'package:flutter_api_samples/material/radio_list_tile/custom_labeled_radio.1.dart' as example;
+import 'package:flutter_test/flutter_test.dart';
+
+void main() {
+  testWidgets('Tapping LabeledRadio toggles the radio', (WidgetTester tester) async {
+    await tester.pumpWidget(
+      const example.LabeledRadioApp(),
+    );
+
+    // First Radio is initially unchecked.
+    Radio<bool> radio = tester.widget(find.byType(Radio<bool>).first);
+    expect(radio.value, true);
+    expect(radio.groupValue, false);
+
+    // Last Radio is initially checked.
+    radio = tester.widget(find.byType(Radio<bool>).last);
+    expect(radio.value, false);
+    expect(radio.groupValue, false);
+
+    // Tap the first labeled radio to toggle the Radio widget.
+    await tester.tap(find.byType(example.LabeledRadio).first);
+    await tester.pumpAndSettle();
+
+    // First Radio is now checked.
+    radio = tester.widget(find.byType(Radio<bool>).first);
+    expect(radio.value, true);
+    expect(radio.groupValue, true);
+
+    // Last Radio is now unchecked.
+    radio = tester.widget(find.byType(Radio<bool>).last);
+    expect(radio.value, false);
+    expect(radio.groupValue, true);
+  });
+}

examples/api/test/material/radio_list_tile/radio_list_tile.0_test.dart

@@ -0,0 +1,38 @@
+// Copyright 2014 The Flutter Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import 'package:flutter/material.dart';
+import 'package:flutter_api_samples/material/radio_list_tile/radio_list_tile.0.dart' as example;
+import 'package:flutter_test/flutter_test.dart';
+
+void main() {
+  testWidgets('Can update RadioListTile group value', (WidgetTester tester) async {
+    await tester.pumpWidget(
+      const example.RadioListTileApp(),
+    );
+
+    // Find the number of RadioListTiles.
+    expect(find.byType(RadioListTile<example.SingingCharacter>), findsNWidgets(2));
+
+    // The initial group value is lafayette for the first RadioListTile.
+    RadioListTile<example.SingingCharacter> radioListTile = tester.widget(find.byType(RadioListTile<example.SingingCharacter>).first);
+    expect(radioListTile.groupValue, example.SingingCharacter.lafayette);
+
+    // The initial group value is lafayette for the last RadioListTile.
+    radioListTile = tester.widget(find.byType(RadioListTile<example.SingingCharacter>).last);
+    expect(radioListTile.groupValue, example.SingingCharacter.lafayette);
+
+    // Tap the last RadioListTile to change the group value to jefferson.
+    await tester.tap(find.byType(RadioListTile<example.SingingCharacter>).last);
+    await tester.pump();
+
+    // The group value is now jefferson for the first RadioListTile.
+    radioListTile = tester.widget(find.byType(RadioListTile<example.SingingCharacter>).first);
+    expect(radioListTile.groupValue, example.SingingCharacter.jefferson);
+
+    // The group value is now jefferson for the last RadioListTile.
+    radioListTile = tester.widget(find.byType(RadioListTile<example.SingingCharacter>).last);
+    expect(radioListTile.groupValue, example.SingingCharacter.jefferson);
+  });
+}

examples/api/test/material/radio_list_tile/radio_list_tile.1_test.dart

@@ -0,0 +1,94 @@
+// Copyright 2014 The Flutter Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import 'package:flutter/material.dart';
+import 'package:flutter_api_samples/material/radio_list_tile/radio_list_tile.1.dart' as example;
+import 'package:flutter_test/flutter_test.dart';
+
+void main() {
+  testWidgets('Radio aligns appropriately', (WidgetTester tester) async {
+    await tester.pumpWidget(
+      const example.RadioListTileApp(),
+    );
+
+    expect(find.byType(RadioListTile<example.Groceries>), findsNWidgets(3));
+
+    Offset tileTopLeft = tester.getTopLeft(find.byType(RadioListTile<example.Groceries>).at(0));
+    Offset radioTopLeft = tester.getTopLeft(find.byType(Radio<example.Groceries>).at(0));
+
+    // The radio is centered vertically with the text.
+    expect(radioTopLeft - tileTopLeft, const Offset(16.0, 16.0));
+
+    tileTopLeft = tester.getTopLeft(find.byType(RadioListTile<example.Groceries>).at(1));
+    radioTopLeft = tester.getTopLeft(find.byType(Radio<example.Groceries>).at(1));
+
+    // The radio is centered vertically with the text.
+    expect(radioTopLeft - tileTopLeft, const Offset(16.0, 30.0));
+
+    tileTopLeft = tester.getTopLeft(find.byType(RadioListTile<example.Groceries>).at(2));
+    radioTopLeft = tester.getTopLeft(find.byType(Radio<example.Groceries>).at(2));
+
+    // The radio is aligned to the top vertically with the text.
+    expect(radioTopLeft - tileTopLeft, const Offset(16.0, 8.0));
+  });
+
+  testWidgets('Radios can be checked', (WidgetTester tester) async {
+    await tester.pumpWidget(
+      const example.RadioListTileApp(),
+    );
+
+    expect(find.byType(RadioListTile<example.Groceries>), findsNWidgets(3));
+    final Finder radioListTile = find.byType(RadioListTile<example.Groceries>);
+
+    //  Initially the first radio is checked.
+    expect(
+      tester.widget<RadioListTile<example.Groceries>>(radioListTile.at(0)).groupValue,
+      example.Groceries.pickles,
+    );
+    expect(
+      tester.widget<RadioListTile<example.Groceries>>(radioListTile.at(1)).groupValue,
+      example.Groceries.pickles,
+    );
+    expect(
+      tester.widget<RadioListTile<example.Groceries>>(radioListTile.at(2)).groupValue,
+      example.Groceries.pickles,
+    );
+
+    // Tap the second radio.
+    await tester.tap(find.byType(Radio<example.Groceries>).at(1));
+    await tester.pumpAndSettle();
+
+    // The second radio is checked.
+    expect(
+      tester.widget<RadioListTile<example.Groceries>>(radioListTile.at(0)).groupValue,
+      example.Groceries.tomato,
+    );
+    expect(
+      tester.widget<RadioListTile<example.Groceries>>(radioListTile.at(1)).groupValue,
+      example.Groceries.tomato,
+    );
+    expect(
+      tester.widget<RadioListTile<example.Groceries>>(radioListTile.at(2)).groupValue,
+      example.Groceries.tomato,
+    );
+
+    // Tap the third radio.
+    await tester.tap(find.byType(Radio<example.Groceries>).at(2));
+    await tester.pumpAndSettle();
+
+    // The third radio is checked.
+    expect(
+      tester.widget<RadioListTile<example.Groceries>>(radioListTile.at(0)).groupValue,
+      example.Groceries.lettuce,
+    );
+    expect(
+      tester.widget<RadioListTile<example.Groceries>>(radioListTile.at(1)).groupValue,
+      example.Groceries.lettuce,
+    );
+    expect(
+      tester.widget<RadioListTile<example.Groceries>>(radioListTile.at(2)).groupValue,
+      example.Groceries.lettuce,
+    );
+  });
+}

examples/api/test/material/radio_list_tile/radio_list_tile.toggleable.0_test.dart

@@ -0,0 +1,38 @@
+// Copyright 2014 The Flutter Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import 'package:flutter/material.dart';
+import 'package:flutter_api_samples/material/radio_list_tile/radio_list_tile.toggleable.0.dart' as example;
+import 'package:flutter_test/flutter_test.dart';
+
+void main() {
+  testWidgets('RadioListTile is toggleable', (WidgetTester tester) async {
+    await tester.pumpWidget(
+      const example.RadioListTileApp(),
+    );
+
+    // Initially the third radio button is not selected.
+    Radio<int> radio = tester.widget(find.byType(Radio<int>).at(2));
+    expect(radio.value, 2);
+    expect(radio.groupValue, null);
+
+    // Tap the third radio button.
+    await tester.tap(find.text('Philip Schuyler'));
+    await tester.pumpAndSettle();
+
+    // The third radio button is now selected.
+    radio = tester.widget(find.byType(Radio<int>).at(2));
+    expect(radio.value, 2);
+    expect(radio.groupValue, 2);
+
+    // Tap the third radio button again.
+    await tester.tap(find.text('Philip Schuyler'));
+    await tester.pumpAndSettle();
+
+    // The third radio button is now unselected.
+    radio = tester.widget(find.byType(Radio<int>).at(2));
+    expect(radio.value, 2);
+    expect(radio.groupValue, null);
+  });
+}

packages/flutter/lib/src/material/radio_list_tile.dart

@@ -86,6 +86,13 @@ import 'theme_data.dart';
 /// ** See code in examples/api/lib/material/radio_list_tile/radio_list_tile.0.dart **
 /// {@end-tool}
 ///
+/// {@tool dartpad}
+/// This sample demonstrates how [RadioListTile] positions the radio widget
+/// relative to the text in different configurations.
+///
+/// ** See code in examples/api/lib/material/radio_list_tile/radio_list_tile.1.dart **
+/// {@end-tool}
+///
 /// ## Semantics in RadioListTile
 ///
 /// Since the entirety of the RadioListTile is interactive, it should represent
@@ -110,7 +117,7 @@ import 'theme_data.dart';
 /// LinkedLabelRadio, that includes an interactive [RichText] widget that
 /// handles tap gestures.
 ///
-/// ** See code in examples/api/lib/material/radio_list_tile/radio_list_tile.1.dart **
+/// ** See code in examples/api/lib/material/radio_list_tile/custom_labeled_radio.0.dart **
 /// {@end-tool}
 ///
 /// ## RadioListTile isn't exactly what I want
@@ -126,7 +133,7 @@ import 'theme_data.dart';
 /// Here is an example of a custom LabeledRadio widget, but you can easily
 /// make your own configurable widget.
 ///
-/// ** See code in examples/api/lib/material/radio_list_tile/radio_list_tile.2.dart **
+/// ** See code in examples/api/lib/material/radio_list_tile/custom_labeled_radio.1.dart **
 /// {@end-tool}
 ///
 /// See also: