| layout | title | permalink |
|---|---|---|
page |
Tabbed AppBar |
/catalog/samples/tabbed-app-bar/ |
An AppBar with a TabBar as its bottom widget.
Android screenshot
A TabBar can be used to navigate among the pages displayed in a TabBarView. Although a TabBar is an ordinary widget that can appear anywhere, it's most often included in the application's AppBar.
Try this app out by creating a new project with flutter create and replacing the contents of lib/main.dart with the code that follows.
// Copyright 2017 The Chromium 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';
class TabbedAppBarSample extends StatelessWidget {
@override
Widget build(BuildContext context) {
return new MaterialApp(
home: new DefaultTabController(
length: choices.length,
child: new Scaffold(
appBar: new AppBar(
title: const Text('Tabbed AppBar'),
bottom: new TabBar(
isScrollable: true,
tabs: choices.map((Choice choice) {
return new Tab(
text: choice.title,
icon: new Icon(choice.icon),
);
}).toList(),
),
),
body: new TabBarView(
children: choices.map((Choice choice) {
return new Padding(
padding: const EdgeInsets.all(16.0),
child: new ChoiceCard(choice: choice),
);
}).toList(),
),
),
),
);
}
}
class Choice {
const Choice({this.title, this.icon});
final String title;
final IconData icon;
}
const List<Choice> choices = const <Choice>[
const Choice(title: 'CAR', icon: Icons.directions_car),
const Choice(title: 'BICYCLE', icon: Icons.directions_bike),
const Choice(title: 'BOAT', icon: Icons.directions_boat),
const Choice(title: 'BUS', icon: Icons.directions_bus),
const Choice(title: 'TRAIN', icon: Icons.directions_railway),
const Choice(title: 'WALK', icon: Icons.directions_walk),
];
class ChoiceCard extends StatelessWidget {
const ChoiceCard({Key key, this.choice}) : super(key: key);
final Choice choice;
@override
Widget build(BuildContext context) {
final TextStyle textStyle = Theme.of(context).textTheme.display1;
return new Card(
color: Colors.white,
child: new Center(
child: new Column(
mainAxisSize: MainAxisSize.min,
crossAxisAlignment: CrossAxisAlignment.center,
children: <Widget>[
new Icon(choice.icon, size: 128.0, color: textStyle.color),
new Text(choice.title, style: textStyle),
],
),
),
);
}
}
void main() {
runApp(new TabbedAppBarSample());
}