No TabController for TabBarView flutter - flutter

Question

I am trying add TabBar by using the below code:
TabBarView(
children: [
Icon(Icons.directions_car),
Icon(Icons.directions_transit),
Icon(Icons.directions_bike),
],
),
but I found the below error:
No TabController for TabBarView.
and this is whole code:
import '../providers/properties.dart';
import '../providers/cities.dart';
import '../providers/property.dart';
import 'package:flutter/material.dart';
import 'package:provider/provider.dart';
import '../widgets/properties_grid.dart';
import '../app_theme.dart';
class MyHomePage extends StatefulWidget {
const MyHomePage({Key key}) : super(key: key);
#override
_MyHomePageState createState() => _MyHomePageState();
}
class _MyHomePageState extends State<MyHomePage> with TickerProviderStateMixin {
int currentTab = 0;
final PageStorageBucket bucket = PageStorageBucket();
var _showOnlyFavorites = false;
// List<HomeList> homeList = HomeList.homeList;
AnimationController animationController;
bool multiple = true;
#override
void initState() {
animationController = AnimationController(
duration: const Duration(milliseconds: 2000), vsync: this);
super.initState();
}
Future<bool> getData() async {
await Future<dynamic>.delayed(const Duration(milliseconds: 0));
return true;
}
#override
void dispose() {
animationController.dispose();
super.dispose();
}
#override
Widget build(BuildContext context) {
// final properties = Provider.of<Properties>(context, listen: false);
return Scaffold(
extendBody: true,
floatingActionButton: FloatingActionButton(
child: Icon(Icons.add),
onPressed: () {},
),
floatingActionButtonLocation: FloatingActionButtonLocation.centerDocked,
bottomNavigationBar: BottomAppBar(
elevation: 0,
shape: CircularNotchedRectangle(),
notchMargin: 10,
child: Container(
height: 60,
child: Row(
mainAxisAlignment: MainAxisAlignment.spaceBetween,
children: <Widget>[
Row(
crossAxisAlignment: CrossAxisAlignment.start,
children: <Widget>[
MaterialButton(
padding: EdgeInsets.all(0),
minWidth: 155,
onPressed: () {
setState(() {
// currentScreen =
// Chat(); // if user taps on this dashboard tab will be active
currentTab = 1;
});
},
child: Column(
mainAxisAlignment: MainAxisAlignment.center,
children: <Widget>[
Icon(
Icons.home,
color: currentTab == 1 ? Colors.blue : Colors.grey,
),
Text(
'Home',
style: TextStyle(
color: currentTab == 1 ? Colors.blue : Colors.grey,
),
),
],
),
)
],
),
// Right Tab bar icons
Row(
crossAxisAlignment: CrossAxisAlignment.start,
children: <Widget>[
MaterialButton(
padding: EdgeInsets.all(0),
minWidth: 60,
onPressed: () {
setState(() {
// currentScreen =
// Settings(); // if user taps on this dashboard tab will be active
currentTab = 3;
});
},
child: Column(
mainAxisAlignment: MainAxisAlignment.center,
children: <Widget>[
Icon(
Icons.view_list,
color: currentTab == 3 ? Colors.blue : Colors.grey,
),
Text(
'Property List',
style: TextStyle(
color: currentTab == 3 ? Colors.blue : Colors.grey,
),
),
],
),
),
MaterialButton(
padding: EdgeInsets.all(0),
minWidth: 77,
onPressed: () {
setState(() {
// currentScreen =
// Settings(); // if user taps on this dashboard tab will be active
currentTab = 4;
});
},
child: Column(
mainAxisAlignment: MainAxisAlignment.center,
children: <Widget>[
Icon(
Icons.location_searching,
color: currentTab == 4 ? Colors.blue : Colors.grey,
),
Text(
'Map',
style: TextStyle(
color: currentTab == 4 ? Colors.blue : Colors.grey,
),
),
],
),
),
],
)
],
),
),
),
backgroundColor: AppTheme.white,
body: Stack(
children: <Widget>[
FutureBuilder<bool>(
future: getData(),
builder: (BuildContext context, AsyncSnapshot<bool> snapshot) {
if (!snapshot.hasData) {
return const SizedBox();
} else {
return Padding(
padding:
EdgeInsets.only(top: MediaQuery.of(context).padding.top),
child: Column(
mainAxisAlignment: MainAxisAlignment.center,
crossAxisAlignment: CrossAxisAlignment.start,
children: <Widget>[
appBar(),
TabBarView(
children: [
Icon(Icons.directions_car),
Icon(Icons.directions_transit),
Icon(Icons.directions_bike),
],
),
Expanded(
child: FutureBuilder<bool>(
future: getData(),
builder: (BuildContext context,
AsyncSnapshot<bool> snapshot) {
if (!snapshot.hasData) {
return const SizedBox();
} else {
return ChangeNotifierProvider(
create: (context) => Properties(),
child: PropertiesGrid(_showOnlyFavorites),
);
}
},
),
),
],
),
);
}
},
),
],
),
);
}
Widget appBar() {
return SizedBox(
height: AppBar().preferredSize.height,
child: Row(
mainAxisAlignment: MainAxisAlignment.center,
children: <Widget>[
Padding(
padding: const EdgeInsets.only(top: 8, left: 8),
child: Container(
width: AppBar().preferredSize.height - 8,
height: AppBar().preferredSize.height - 8,
),
),
Expanded(
child: Center(
child: Padding(
padding: const EdgeInsets.only(top: 4),
child:
Image.asset('assets/images/logo.png', fit: BoxFit.contain),
),
),
),
Padding(
padding: const EdgeInsets.only(top: 8, right: 8),
child: Container(
width: AppBar().preferredSize.height - 8,
height: AppBar().preferredSize.height - 8,
color: Colors.white,
child: Material(
color: Colors.transparent,
child: InkWell(
borderRadius:
BorderRadius.circular(AppBar().preferredSize.height),
child: Icon(
Icons.location_on,
color: AppTheme.dark_grey,
),
onTap: () {
setState(() {
multiple = !multiple;
});
},
),
),
),
),
],
),
);
}
So How Can I solve this problem...

Answer 1

How can TabBar get to know about the TabBarView? There should be a connection between them to change when tab press or if swap from view right?
So, to connect both two, you have to either wrap your parent widget using DefaultTabController or providing a TabController for TabBar and TabBarView to controll and configure Tabs.
Flutter cookbook example for DefaultTabController:
import 'package:flutter/material.dart';
void main() {
runApp(TabBarDemo());
}
class TabBarDemo extends StatelessWidget {
#override
Widget build(BuildContext context) {
return MaterialApp(
home: DefaultTabController(
length: 3,
child: Scaffold(
appBar: AppBar(
bottom: TabBar(
tabs: [
Tab(icon: Icon(Icons.directions_car)),
Tab(icon: Icon(Icons.directions_transit)),
Tab(icon: Icon(Icons.directions_bike)),
],
),
title: Text('Tabs Demo'),
),
body: TabBarView(
children: [
Icon(Icons.directions_car),
Icon(Icons.directions_transit),
Icon(Icons.directions_bike),
],
),
),
),
);
}
}
Using TabController(Example from doc):
class MyTabbedPage extends StatefulWidget {
const MyTabbedPage({ Key key }) : super(key: key);
#override
_MyTabbedPageState createState() => _MyTabbedPageState();
}
class _MyTabbedPageState extends State<MyTabbedPage> with SingleTickerProviderStateMixin {
final List<Tab> myTabs = <Tab>[
Tab(text: 'LEFT'),
Tab(text: 'RIGHT'),
];
TabController _tabController;
#override
void initState() {
super.initState();
_tabController = TabController(vsync: this, length: myTabs.length);
}
#override
void dispose() {
_tabController.dispose();
super.dispose();
}
#override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
bottom: TabBar(
controller: _tabController,
tabs: myTabs,
),
),
body: TabBarView(
controller: _tabController,
children: myTabs.map((Tab tab) {
final String label = tab.text.toLowerCase();
return Center(
child: Text(
'This is the $label tab',
style: const TextStyle(fontSize: 36),
),
);
}).toList(),
),
);
}
}