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// 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';
/// Flutter code sample for [RefreshIndicator].
void main() => runApp(const RefreshIndicatorExampleApp());
class RefreshIndicatorExampleApp extends StatelessWidget {
const RefreshIndicatorExampleApp({super.key});
@override
Widget build(BuildContext context) {
return const MaterialApp(
home: RefreshIndicatorExample(),
);
}
}
class RefreshIndicatorExample extends StatefulWidget {
const RefreshIndicatorExample({super.key});
@override
State<RefreshIndicatorExample> createState() => _RefreshIndicatorExampleState();
}
class _RefreshIndicatorExampleState extends State<RefreshIndicatorExample> {
final GlobalKey<RefreshIndicatorState> _refreshIndicatorKey = GlobalKey<RefreshIndicatorState>();
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: const Text('RefreshIndicator Sample'),
),
body: RefreshIndicator(
key: _refreshIndicatorKey,
color: Colors.white,
backgroundColor: Colors.blue,
strokeWidth: 4.0,
onRefresh: () async {
// Replace this delay with the code to be executed during refresh
// and return a Future when code finishes execution.
return Future<void>.delayed(const Duration(seconds: 3));
},
// Pull from top to show refresh indicator.
child: ListView.builder(
itemCount: 25,
itemBuilder: (BuildContext context, int index) {
return ListTile(
title: Text('Item $index'),
);
},
),
),
floatingActionButton: FloatingActionButton.extended(
onPressed: () {
// Show refresh indicator programmatically on button tap.
_refreshIndicatorKey.currentState?.show();
},
icon: const Icon(Icons.refresh),
label: const Text('Show Indicator'),
),
);
}
}