1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
// 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 NavigationBar
import 'package:flutter/material.dart';
void main() {
runApp(const MyApp());
}
class MyApp extends StatelessWidget {
const MyApp({super.key});
@override
Widget build(BuildContext context) {
return const MaterialApp(home: NavigationExample());
}
}
class NavigationExample extends StatefulWidget {
const NavigationExample({super.key});
@override
State<NavigationExample> createState() => _NavigationExampleState();
}
class _NavigationExampleState extends State<NavigationExample> {
int currentPageIndex = 0;
@override
Widget build(BuildContext context) {
return Scaffold(
bottomNavigationBar: NavigationBar(
onDestinationSelected: (int index) {
setState(() {
currentPageIndex = index;
});
},
selectedIndex: currentPageIndex,
destinations: const <Widget>[
NavigationDestination(
icon: Icon(Icons.explore),
label: 'Explore',
),
NavigationDestination(
icon: Icon(Icons.commute),
label: 'Commute',
),
NavigationDestination(
selectedIcon: Icon(Icons.bookmark),
icon: Icon(Icons.bookmark_border),
label: 'Saved',
),
],
),
body: <Widget>[
Container(
color: Colors.red,
alignment: Alignment.center,
child: const Text('Page 1'),
),
Container(
color: Colors.green,
alignment: Alignment.center,
child: const Text('Page 2'),
),
Container(
color: Colors.blue,
alignment: Alignment.center,
child: const Text('Page 3'),
),
][currentPageIndex],
);
}
}