Multi tab / page view in flutter
To give the pages of the TabBarView
a unique scroll position storage container, use a PageStorageKey
.
import 'package:flutter/material.dart';
void main() {
runApp(new MyApp());
}
class MyApp extends StatelessWidget {
@override
Widget build(BuildContext context) {
return new MaterialApp(
home: new MyHomePage(),
);
}
}
class MyHomePage extends StatefulWidget {
@override
State createState() => new MyHomePageState();
}
class MyHomePageState extends State<MyHomePage> with TickerProviderStateMixin {
TabController _controller;
int _tab = 0;
@override
void initState() {
_controller = new TabController(length: 2, vsync: this);
}
Widget build(BuildContext context) {
return new Scaffold(
appBar: new AppBar(title: new Text('Example App')),
body: new TabBarView(
controller: _controller,
children: <Widget>[
new ListView.builder(
key: new PageStorageKey('feed'),
itemBuilder: (BuildContext context, int index) {
return new ListTile(
title: new Text('Feed Item $index'),
);
},
),
new ListView.builder(
key: new PageStorageKey('notifications'),
itemBuilder: (BuildContext context, int index) {
return new ListTile(
title: new Text('Notification $index'),
);
},
),
],
),
bottomNavigationBar: new BottomNavigationBar(
onTap: (int value) {
_controller.animateTo(value);
setState(() {
_tab = value;
});
},
currentIndex: _tab,
items: <BottomNavigationBarItem>[
new BottomNavigationBarItem(
icon: new Icon(Icons.home),
title: new Text('Home'),
),
new BottomNavigationBarItem(
icon: new Icon(Icons.notifications),
title: new Text('Notifications'),
),
],
),
);
}
}