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78 lines
2.0 KiB
Dart
78 lines
2.0 KiB
Dart
// Copyright 2014 The Flutter Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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import 'package:flutter/material.dart';
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/// Flutter code sample for [NavigationBar].
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void main() => runApp(const NavigationBarApp());
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class NavigationBarApp extends StatelessWidget {
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const NavigationBarApp({super.key});
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@override
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Widget build(BuildContext context) {
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return const MaterialApp(home: NavigationExample());
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}
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}
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class NavigationExample extends StatefulWidget {
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const NavigationExample({super.key});
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@override
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State<NavigationExample> createState() => _NavigationExampleState();
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}
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class _NavigationExampleState extends State<NavigationExample> {
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int currentPageIndex = 0;
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@override
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Widget build(BuildContext context) {
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return Scaffold(
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bottomNavigationBar: NavigationBar(
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onDestinationSelected: (int index) {
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setState(() {
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currentPageIndex = index;
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});
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},
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indicatorColor: Colors.amber[800],
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selectedIndex: currentPageIndex,
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destinations: const <Widget>[
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NavigationDestination(
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selectedIcon: Icon(Icons.home),
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icon: Icon(Icons.home_outlined),
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label: 'Home',
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),
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NavigationDestination(
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icon: Icon(Icons.business),
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label: 'Business',
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),
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NavigationDestination(
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selectedIcon: Icon(Icons.school),
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icon: Icon(Icons.school_outlined),
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label: 'School',
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),
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],
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),
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body: <Widget>[
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Container(
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color: Colors.red,
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alignment: Alignment.center,
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child: const Text('Page 1'),
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),
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Container(
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color: Colors.green,
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alignment: Alignment.center,
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child: const Text('Page 2'),
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),
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Container(
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color: Colors.blue,
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alignment: Alignment.center,
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child: const Text('Page 3'),
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),
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][currentPageIndex],
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);
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}
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}
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