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);
},
);
},
),<code_end>
<topic_end>
<topic_start>
Interactive example
<code_start>import 'package:flutter/material.dart';
class Todo {
final String title;
final String description;
const Todo(this.title, this.description);
}
void main() {
runApp(
MaterialApp(
title: 'Passing Data',
home: TodosScreen(
todos: List.generate(
20,
(i) => Todo(
'Todo $i',
'A description of what needs to be done for Todo $i',
),
),
),
),
);
}
class TodosScreen extends StatelessWidget {
const TodosScreen({super.key, required this.todos});
final List<Todo> todos;
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: const Text('Todos'),
),
body: ListView.builder(
itemCount: todos.length,
itemBuilder: (context, index) {
return ListTile(
title: Text(todos[index].title),
// When a user taps the ListTile, navigate to the DetailScreen.
// Notice that you're not only creating a DetailScreen, you're
// also passing the current todo through to it.
onTap: () {
Navigator.push(
context,
MaterialPageRoute(
builder: (context) => DetailScreen(todo: todos[index]),
),
);
},
);
},
),
);
}
}
class DetailScreen extends StatelessWidget {
// In the constructor, require a Todo.
const DetailScreen({super.key, required this.todo});
// Declare a field that holds the Todo.
final Todo todo;
@override
Widget build(BuildContext context) {
// Use the Todo to create the UI.
return Scaffold(
appBar: AppBar(
title: Text(todo.title),
),
body: Padding(
padding: const EdgeInsets.all(16),
child: Text(todo.description),
),
);
}
}<code_end>
<topic_end>
<topic_start>
Alternatively, pass the arguments using RouteSettings
Repeat the first two steps.<topic_end>
<topic_start>
Create a detail screen to extract the arguments
Next, create a detail screen that extracts and displays the title and description from the Todo. To access the Todo, use the ModalRoute.of() method. This method returns the current route with the arguments.
<code_start>class DetailScreen extends StatelessWidget {
const DetailScreen({super.key});
@override
Widget build(BuildContext context) {
final todo = ModalRoute.of(context)!.settings.arguments as Todo;
// Use the Todo to create the UI.
return Scaffold(
appBar: AppBar(
title: Text(todo.title),
),
body: Padding(
padding: const EdgeInsets.all(16),
child: Text(todo.description),