Related
I have BottomNavigationBar in flutter & called separate widgets for each tab. For example I am having button into that widget which redirects to new screen, I want that BottomNavigationBar should be persisted in new screen as well. I have checked couple of articles but unable to understand. Below is code for BottomTabNavigationBar
import 'package:flutter/material.dart';
import 'package:timeout_dubai/fragments/HomeFragment.dart';
import 'package:timeout_dubai/fragments/MtTimeFragment.dart';
import 'package:timeout_dubai/fragments/MyLocFragment.dart';
import 'package:timeout_dubai/fragments/ThingsLoveFragment.dart';
class LoginScreen extends StatefulWidget {
#override
State<StatefulWidget> createState() {
return _HomeState();
}
}
class _HomeState extends State<LoginScreen> {
int _currentIndex = 0;
GlobalKey globalKey = new GlobalKey(debugLabel: 'btm_app_bar');
final List<Widget> _children = [
new HomeFragment(),
new ThingsLoveFragment(),
new MyLocFragment(),
new MyTimeFragment()
];
#override
Widget build(BuildContext context) {
return Scaffold(
body: _children[_currentIndex],
bottomNavigationBar: BottomNavigationBar(
type: BottomNavigationBarType.fixed,
onTap: onTabTapped,
key: globalKey,
currentIndex: _currentIndex,
items: [
BottomNavigationBarItem(
icon: Icon(Icons.home,),
title: Text('Home'),
),
BottomNavigationBarItem(
icon: Icon(Icons.favorite),
title: Text('Things I Love'),
),
BottomNavigationBarItem(
icon: Icon(Icons.location_on),
title: Text('My Locations'),
),
BottomNavigationBarItem(
icon: Icon(Icons.person),
title: Text('My Time Out')
),
],
),
);
}
void onTabTapped(int index) {
print("Index $index");
setState(() {
_currentIndex = index;
});
}
}
Grettings i have this code
import 'package:flutter/material.dart';
import 'package:simplifly/classes/Database/Users.dart';
import 'package:simplifly/dashbaord/chat.dart';
import 'package:simplifly/dashbaord/collection.dart';
import 'package:simplifly/dashbaord/home.dart';
import 'package:simplifly/dashbaord/mytrip.dart';
import 'media.dart';
class Dashboardmain extends StatefulWidget {
final User usr;
Dashboardmain({Key key, #required this.usr}) : super(key: key);
#override
_Dashboardmain createState() => _Dashboardmain();
}
class _Dashboardmain extends State<Dashboardmain> {
String group="";
int _currentIndex=0;
void onTabTapped(int index) {
setState(() {
_currentIndex = index;
});
}
#override
Widget build(BuildContext context) {
return DefaultTabController(
length: 4,
child: Scaffold(
appBar: AppBar(title: Text('Sami'),),
body: [
Home(),
Media(),
MyTrip(),
Collection(),
Chat()
].elementAt(_currentIndex),
bottomNavigationBar: BottomNavigationBar(
type: BottomNavigationBarType.fixed,
// this will be set when a new tab is tapped
onTap: onTabTapped, // new
currentIndex: _currentIndex,
items: [
BottomNavigationBarItem(
icon: ImageIcon(
AssetImage(
"images/home_home.png",
),
),
title: new Text('Home'),
),
BottomNavigationBarItem(
icon: ImageIcon(
AssetImage("images/home_media.png"),
),
title: new Text('Media'),
),
BottomNavigationBarItem(
icon: ImageIcon(
AssetImage("images/home_myTrip.png"),
),
title: Text('My trips')),
BottomNavigationBarItem(
icon: ImageIcon(
AssetImage("images/home_collection.png"),
),
title: Text('Collection')),
BottomNavigationBarItem(
icon: ImageIcon(
AssetImage("images/home_chat.png"),
),
title: Text('Chat'))
],
),
),
);
}
}
by default the Home is displayed and it show data from firebase in a list
the other tabs for example media depends on the data in the home
what i want is when i press on a list item in the Home to pass data to the media class
how this can me done
is declaring a global variable will solve it or is there any solution for that
thanks
I want to show a drawer when user clicks on the 4th(more_vert) icon, but I am not able to implement it. In my current implementation when 4th icon is clicked flutter takes me to a new page and there shows the drawer not over the current screen as it should. What am I doing wrong ? Also what is the differnce between BottomNavigationBar and BottomAppBar I could not find the difference anywhere. I checked out a few articles and it I think BottomAppBar is used to show the Fab floating in the bottom appbar. Is there any other difference between the two and when should one use one over the other.
class Home extends StatefulWidget {
#override
_HomeState createState() => _HomeState();
}
class _HomeState extends State<Home> {
List<Widget> _widgetOptions = <Widget>[
Page1(),
Page2(),
Page3(),
Page4(), // this page implements the drawer
];
int _currentSelected = 0;
void _onItemTapped(int index) {
setState(() {
_currentSelected = index;
});
}
#override
Widget build(BuildContext context) {
return Scaffold(
body: _widgetOptions.elementAt(_currentSelected),
bottomNavigationBar: BottomNavigationBar(
type: BottomNavigationBarType.fixed,
onTap: _onItemTapped,
currentIndex: _currentSelected,
showUnselectedLabels: true,
unselectedItemColor: Colors.grey[800],
selectedItemColor: Color.fromRGBO(10, 135, 255, 1),
items: <BottomNavigationBarItem>[
BottomNavigationBarItem(
icon: Icon(AntDesign.carryout),
),
BottomNavigationBarItem(
icon: Icon(MaterialCommunityIcons.sack),
),
BottomNavigationBarItem(
icon: Icon(Octicons.archive),
),
BottomNavigationBarItem(
icon: Icon(Icons.more_vert),
)
],
),
// backgroundColor: Colors.black,
);
}
}
You don't need an extra page for that.
You could do it like that:
class Home extends StatefulWidget {
#override
_HomeState createState() => _HomeState();
}
class _HomeState extends State<Home> {
List<Widget> _widgetOptions = <Widget>[
Page(),
Page(),
Page(),
];
int _currentSelected = 0;
GlobalKey<ScaffoldState> _drawerKey = GlobalKey();
void _onItemTapped(int index) {
index == 3
? _drawerKey.currentState.openDrawer()
: setState(() {
_currentSelected = index;
});
}
#override
Widget build(BuildContext context) {
return Scaffold(
key: _drawerKey,
body: _widgetOptions.elementAt(_currentSelected),
drawer: Drawer(),
bottomNavigationBar: BottomNavigationBar(
type: BottomNavigationBarType.fixed,
onTap: _onItemTapped,
currentIndex: _currentSelected,
showUnselectedLabels: true,
unselectedItemColor: Colors.grey[800],
selectedItemColor: Color.fromRGBO(10, 135, 255, 1),
items: <BottomNavigationBarItem>[
BottomNavigationBarItem(
title: Text('Page 1'),
icon: Icon(Icons.access_alarm),
),
BottomNavigationBarItem(
title: Text('Page 2'),
icon: Icon(Icons.accessible),
),
BottomNavigationBarItem(
title: Text('Page 3'),
icon: Icon(Icons.adb),
),
BottomNavigationBarItem(
title: Text('Drawer'),
icon: Icon(Icons.more_vert),
)
],
),
);
}
}
class Page extends StatelessWidget {
const Page({Key key}) : super(key: key);
#override
Widget build(BuildContext context) {
return Container();
}
}
Adding a GlobalKey for the Scaffold which implements the drawer and implementing the Drawer in your root Scaffold.
The BottomNavigationBar doesn't show the drawer icon like the AppBar does.
To open the drawer programmatically :
Create this variable as state :
GlobalKey<ScaffoldState> _scaffoldKey = GlobalKey();
Set it as the Scaffold's key :
Scaffold(
key: _scaffoldKey,
Then, you can use the key state to open the drawer :
_scaffoldKey.currentState.openDrawer();
The solutions provided above work if you are not using the newer versions of Flutter with Null Safety. In case you are using Flutter 2.0 or greater. Due to Null Safety, you will get an error saying:
The method 'openDrawer' can't be unconditionally invoked because the receiver can be 'null'.
Try making the call conditional (using '?.') or adding a null check to the target
Use: _drawerKey.currentState!.openDrawer();
I'm trying to change the AppBar title depending on which page the user is on - the pages are controlled by a BottomNavigationBar which loads the different classes(pages)
The only way i've managed to change this is by including a appbar for each page, which i believe is not the way to go ahead.
class HomePage extends StatefulWidget {
final String title;
HomePage({Key key, this.auth, this.userId, this.onSignedOut, this.title})
: super(key: key);
final BaseAuth auth;
final VoidCallback onSignedOut;
final String userId;
#override
State<StatefulWidget> createState() => new _HomePageState();
}
class _HomePageState extends State<HomePage> {
int _currentIndex = 0;
final List<Widget> _children = [
Projects(),
TimedProject(),
Overview(),
Clients(),
];
GlobalKey<ScaffoldState> _scaffoldKey = new GlobalKey();
#override
Widget build(BuildContext context) {
return new Scaffold(
key: _scaffoldKey,
appBar: AppBar(
title: Text('TITLE I NEED TO CHANGE DEPENDING ON PAGE',
style: TextStyle(color: Colors.black),
),
backgroundColor: Colors.white,
),
endDrawer: AppDrawer(),
body: _children[_currentIndex],
bottomNavigationBar: BottomNavigationBar(
onTap: onTabTapped,
currentIndex: _currentIndex,
selectedItemColor: Theme.of(context).primaryColor,
type: BottomNavigationBarType.fixed,
items: [
new BottomNavigationBarItem(
icon: Icon(Icons.storage),
title: Text('Jobs'),
),
new BottomNavigationBarItem(
icon: Icon(Icons.timer),
title: Text('Timer'),
),
new BottomNavigationBarItem(
icon: Icon(Icons.pie_chart_outlined),
title: Text('Overview'),
),
new BottomNavigationBarItem(
icon: Icon(Icons.supervisor_account), title: Text('Clients'))
],
),
);
}
void onTabTapped(int index) {
setState(() {
_currentIndex = index;
});
}
}
Create a variable that holds the appbar title or you can use the same title variable that is passed in your HomePage class but you have to remove the final.
If you are using the title variable in HomePage class, make sure to use
"widget.title"
class HomePage extends StatefulWidget {
final String title;
HomePage({Key key, this.auth, this.userId, this.onSignedOut, this.title})
: super(key: key);
final BaseAuth auth;
final VoidCallback onSignedOut;
final String userId;
#override
State<StatefulWidget> createState() => new _HomePageState();
}
class _HomePageState extends State<HomePage> {
int _currentIndex = 0;
String _title;
final List<Widget> _children = [
Projects(),
TimedProject(),
Overview(),
Clients(),
];
GlobalKey<ScaffoldState> _scaffoldKey = new GlobalKey();
#override
initState(){
_title = 'Some default value';
}
#override
Widget build(BuildContext context) {
return new Scaffold(
key: _scaffoldKey,
appBar: AppBar(
title: Text(_title,
style: TextStyle(color: Colors.black),
),
backgroundColor: Colors.white,
),
endDrawer: AppDrawer(),
body: _children[_currentIndex],
bottomNavigationBar: BottomNavigationBar(
onTap: onTabTapped,
currentIndex: _currentIndex,
selectedItemColor: Theme.of(context).primaryColor,
type: BottomNavigationBarType.fixed,
items: [
new BottomNavigationBarItem(
icon: Icon(Icons.storage),
title: Text('Jobs'),
),
new BottomNavigationBarItem(
icon: Icon(Icons.timer),
title: Text('Timer'),
),
new BottomNavigationBarItem(
icon: Icon(Icons.pie_chart_outlined),
title: Text('Overview'),
),
new BottomNavigationBarItem(
icon: Icon(Icons.supervisor_account), title: Text('Clients'))
],
),
);
}
void onTabTapped(int index) {
setState(() {
_currentIndex = index;
switch(index) {
case 0: { _title = 'Jobs'; }
break;
case 1: { _title = 'Timer'; }
break;
case 2: { _title = 'Overview'; }
break;
case 3: { _title = 'Clients'; }
break;
}
});
}
}
Thanks for the solution, is there away to take the bottom nav and out it in its own .dart file like
bottomNavigationBar: BottomNavBar(),
and get the selected tab index
class _HomeScreen2State extends State<HomeScreen2> {
//Hold current Tab Index
int _selectTab = 0;
final _pageOptions = [
HomeScreen(),
NewOrderScreen(),
OrderHistoryScreen(),
ContactScreen(),
];
#override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text('Gift Shop Dashboard'),
),
body: _pageOptions[_selectTab],
bottomNavigationBar: BottomNavBar(),
);
}
}
To separate BottomNavigationBar in a different .dart file, for example, in config.dart:
import 'package:flutter/material.dart';
class Config {
static List<BottomNavigationBarItem> navigationBarItems = [
BottomNavigationBarItem(
icon: Icon(
Icons.date_range,
),
title: Text(
"Calendar",
),
),
BottomNavigationBarItem(
icon: Icon(
Icons.list, // event_note
),
title: Text(
"List",
),
),
BottomNavigationBarItem(
icon: Icon(
Icons.bookmark_border, // grid_on
),
title: Text(
"Bookmarks",
),
),
BottomNavigationBarItem(
icon: Icon(
Icons.account_circle,
),
title: Text(
"Me",
),
),
];
static BottomNavigationBar navigationBar = BottomNavigationBar(
items: navigationBarItems,
type: BottomNavigationBarType.fixed,
fixedColor: Colors.red,
);
}
and in main.dart:
import 'package:flutter/material.dart';
import 'config.dart';
void main() => runApp(App());
class App extends StatelessWidget {
#override
Widget build(BuildContext context) {
return MaterialApp(
title: 'Hello',
theme: ThemeData(
primarySwatch: Colors.blueGrey,
),
home: HomePage(),
);
}
}
class HomePage extends StatefulWidget {
HomePage({Key key}) : super(key: key);
#override
_HomePageState createState() => _HomePageState();
}
class _HomePageState extends State<HomePage> {
int _index = 0;
Text _title;
_onTap(int index) {
setState(() {
_index = index;
_title = Config.navigationBarItems[_index].title;
});
}
#override
void initState() {
_title = Config.navigationBarItems[_index].title;
super.initState();
}
#override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: _title,
),
body: Container(
),
bottomNavigationBar: BottomNavigationBar(
currentIndex: _index,
type: Config.navigationBar.type,
fixedColor: Config.navigationBar.fixedColor,
items: Config.navigationBar.items,
onTap: _onTap,
),
);
}
}
just make condition in ontap
class _MyStatefulWidgetState extends State<MyStatefulWidget> {
int _selectedIndex = 1;
String appbarTitleString = "Home";
var appBarTitleText = new Text("Home");
static const TextStyle optionStyle =
TextStyle(fontSize: 30, fontWeight: FontWeight.bold);
static const List<Widget> _widgetOptions = <Widget>[
Text(
'Index 0: Profile',
style: optionStyle,
),
Text(
'Index 1: Home',
style: optionStyle,
),
Text(
'Index 2: More',
style: optionStyle,
),
];
#override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: appBarTitleText,
),
body: Center(
child: _widgetOptions.elementAt(_selectedIndex),
),
bottomNavigationBar: BottomNavigationBar(
items: const <BottomNavigationBarItem>[
BottomNavigationBarItem(
icon: Icon(Icons.business),
title: Text('Profile'),
),
BottomNavigationBarItem(
icon: Icon(Icons.home),
title: Text('Home'),
),
BottomNavigationBarItem(
icon: Icon(Icons.school),
title: Text('More'),
),
],
currentIndex: _selectedIndex,
selectedItemColor: Colors.amber[800],
onTap: _onItemTapped,
),
);
}
void _onItemTapped(int index) {
setState(() {
_selectedIndex = index;
if (index == 0){
appbarTitleString = "Profile" ;
appBarTitleText = new Text(appbarTitleString);
}else if (index == 1){
appbarTitleString = "Home" ;
appBarTitleText = new Text(appbarTitleString);
}else if(index == 2){
appbarTitleString = "More" ;
appBarTitleText = new Text(appbarTitleString);
}
});
}
}
it is too Simple, using only two variable we can handle it.
Take Two Variables like:
int _selectedIndex = 0;
String _page_title = "DashBoard";
and Replace page title on every index changed. like as below,
void _onItemTapped(int index) {
setState(() {
_selectedIndex = index;
if (index == 0) {
_page_title = "DashBoard";
} else if (index == 1) {
_page_title = "Search";
} else if (index == 2) {
_page_title = "Setting";
} else if (index == 3) {
_page_title = "Profile";
}
});
make a list which decide to perform task from selected tab.
static const List<Widget> _widgetOptions = <Widget>[
Text(
'Home 1',
style: optionStyle,
),
Text(
'Home 2',
style: optionStyle,
),
Text(
'Home 3',
style: optionStyle,
),
Profile(),
];
And adjust code in Build() function as below.
#override
Widget build(BuildContext context) {
// TODO: implement build
return Scaffold(
appBar: AppBar(
title: Text(_page_title),
automaticallyImplyLeading: false, // hide back arrow from appbar
),
body: Center(
child: _widgetOptions.elementAt(_selectedIndex),
),
bottomNavigationBar: BottomNavigationBar(
items: const <BottomNavigationBarItem>[
BottomNavigationBarItem(
icon: Icon(
Icons.home,
color: Colors.grey,
),
label: 'Home',
),
BottomNavigationBarItem(
icon: Icon(
Icons.search,
color: Colors.grey,
),
label: 'Search',
),
BottomNavigationBarItem(
icon: Icon(
Icons.settings,
color: Colors.grey,
),
label: 'Setting',
),
BottomNavigationBarItem(
icon: Icon(
Icons.face_retouching_natural_sharp,
color: Colors.grey,
),
label: 'Profile',
),
],
currentIndex: _selectedIndex,
selectedItemColor: Colors.blue,
onTap: _onItemTapped,
),
);
}
}
☻♥ Done.
In case you also have different actions, leadings, etc for different pages, You can have different appbars in separate files and import them like pages.
static final List<Widget> _pages = [
const HomeScreen(),
const BookingScreen(),
const AccountScreen(),
];
static final List<Widget> _appBars = [
const HomeAppBar(),
const BookingAppBar(),
const AccountAppBar(),
];
Then you can have variable:
int _selectedIndex = 0;
Your onTapped function will be like:
void _onItemTapped(int index) {
setState(() {
_selectedIndex = index;
});
}
Your build would be like this:
#override
Widget build(BuildContext context) {
return Scaffold(
appBar: PreferredSize(
preferredSize: const Size.fromHeight(56), // 56 is default height
child: _appBars[_selectedIndex],
), // PreferredSize
body: _pages[_selectedIndex],
bottomNavigationBar: BottomNavigationBar(
currentIndex: _selectedIndex,
onTap: _onItemTapped,
items: const [
BottomNavigationBarItem(
icon: Icon(Icons.home_rounded),
label: "Home",
), // BottomNavigationBarItem
BottomNavigationBarItem(
icon: Icon(Icons.schedule_rounded),
label: "Bookings",
), // BottomNavigationBarItem
BottomNavigationBarItem(
icon: Icon(Icons.person_rounded),
label: "Account",
), // BottomNavigationBarItem
],
), // BottomNavigationBar
); // Scaffold
}
The Flutter Gallery example of BottomNavigationBar uses a Stack of FadeTransitions in the body of the Scaffold.
I feel it would be cleaner (and easier to animate) if we could switch pages by using a Navigator.
Are there any examples of this?
int index = 0;
#override
Widget build(BuildContext context) {
return new Scaffold(
body: new Stack(
children: <Widget>[
new Offstage(
offstage: index != 0,
child: new TickerMode(
enabled: index == 0,
child: new MaterialApp(home: new YourLeftPage()),
),
),
new Offstage(
offstage: index != 1,
child: new TickerMode(
enabled: index == 1,
child: new MaterialApp(home: new YourRightPage()),
),
),
],
),
bottomNavigationBar: new BottomNavigationBar(
currentIndex: index,
onTap: (int index) { setState((){ this.index = index; }); },
items: <BottomNavigationBarItem>[
new BottomNavigationBarItem(
icon: new Icon(Icons.home),
title: new Text("Left"),
),
new BottomNavigationBarItem(
icon: new Icon(Icons.search),
title: new Text("Right"),
),
],
),
);
}
You should keep each page by Stack to keep their state.
Offstage stops painting, TickerMode stops animation.
MaterialApp includes Navigator.
Output:
Code:
int _index = 0;
#override
Widget build(BuildContext context) {
Widget child;
switch (_index) {
case 0:
child = FlutterLogo();
break;
case 1:
child = FlutterLogo(colors: Colors.orange);
break;
case 2:
child = FlutterLogo(colors: Colors.red);
break;
}
return Scaffold(
body: SizedBox.expand(child: child),
bottomNavigationBar: BottomNavigationBar(
onTap: (newIndex) => setState(() => _index = newIndex),
currentIndex: _index,
items: [
BottomNavigationBarItem(icon: Icon(Icons.looks_one), title: Text("Blue")),
BottomNavigationBarItem(icon: Icon(Icons.looks_two), title: Text("Orange")),
BottomNavigationBarItem(icon: Icon(Icons.looks_3), title: Text("Red")),
],
),
);
}
Here is an example how you can use Navigator with BottomNavigationBar to navigate different screen.
import 'package:flutter/material.dart';
void main() => runApp(MyApp());
class MyApp extends StatelessWidget {
#override
Widget build(BuildContext context) {
return MaterialApp(
title: 'Flutter Demo',
theme: ThemeData(
primarySwatch: Colors.blue,
),
home: MyHomePage(title: 'Flutter Demo Home Page'),
);
}
}
class MyHomePage extends StatefulWidget {
MyHomePage({Key key, this.title}) : super(key: key);
final String title;
#override
_MyHomePageState createState() => _MyHomePageState();
}
class _MyHomePageState extends State<MyHomePage> {
// This navigator state will be used to navigate different pages
final GlobalKey<NavigatorState> _navigatorKey = GlobalKey<NavigatorState>();
int _currentTabIndex = 0;
#override
Widget build(BuildContext context) {
return SafeArea(
child: Scaffold(
body: Navigator(key: _navigatorKey, onGenerateRoute: generateRoute),
bottomNavigationBar: _bottomNavigationBar(),
),
);
}
Widget _bottomNavigationBar() {
return BottomNavigationBar(
type: BottomNavigationBarType.fixed,
items: [
BottomNavigationBarItem(
icon: Icon(Icons.home),
title: Text("Home"),
),
BottomNavigationBarItem(
icon: Icon(Icons.account_circle), title: Text("Account")),
BottomNavigationBarItem(
icon: Icon(Icons.settings),
title: Text("Settings"),
)
],
onTap: _onTap,
currentIndex: _currentTabIndex,
);
}
_onTap(int tabIndex) {
switch (tabIndex) {
case 0:
_navigatorKey.currentState.pushReplacementNamed("Home");
break;
case 1:
_navigatorKey.currentState.pushReplacementNamed("Account");
break;
case 2:
_navigatorKey.currentState.pushReplacementNamed("Settings");
break;
}
setState(() {
_currentTabIndex = tabIndex;
});
}
Route<dynamic> generateRoute(RouteSettings settings) {
switch (settings.name) {
case "Account":
return MaterialPageRoute(builder: (context) => Container(color: Colors.blue,child: Center(child: Text("Account"))));
case "Settings":
return MaterialPageRoute(builder: (context) => Container(color: Colors.green,child: Center(child: Text("Settings"))));
default:
return MaterialPageRoute(builder: (context) => Container(color: Colors.white,child: Center(child: Text("Home"))));
}
}
}
Here is example:
int _currentIndex = 0;
Route<Null> _getRoute(RouteSettings settings) {
final initialSettings = new RouteSettings(
name: settings.name,
isInitialRoute: true);
return new MaterialPageRoute<Null>(
settings: initialSettings,
builder: (context) =>
new Scaffold(
body: new Center(
child: new Container(
height: 200.0,
width: 200.0,
child: new Column(children: <Widget>[
new Text(settings.name),
new FlatButton(onPressed: () =>
Navigator.of(context).pushNamed(
"${settings.name}/next"), child: new Text("push")),
],
))
),
bottomNavigationBar: new BottomNavigationBar(
currentIndex: _currentIndex,
onTap: (value) {
final routes = ["/list", "/map"];
_currentIndex = value;
Navigator.of(context).pushNamedAndRemoveUntil(
routes[value], (route) => false);
},
items: [
new BottomNavigationBarItem(
icon: new Icon(Icons.list), title: new Text("List")),
new BottomNavigationBarItem(
icon: new Icon(Icons.map), title: new Text("Map")),
]),
));
}
#override
Widget build(BuildContext context) =>
new MaterialApp(
initialRoute: "/list",
onGenerateRoute: _getRoute,
theme: new ThemeData(
primarySwatch: Colors.blue,
),
);
You can set isInitialRoute to true and pass it to MaterialPageRoute. It will remove pop animation.
And to remove old routes you can use pushNamedAndRemoveUntil
Navigator.of(context).pushNamedAndRemoveUntil(routes[value], (route) => false);
To set current page you can have a variable in your state _currentIndex and assign it to BottomNavigationBar:
Glad You asked, I experimented with this a couple of months back and tried to simplify this through a blog post. I won't be able to post the complete code here since it is pretty long, But I can certainly link all the resources to clarify it.
Everything about the BottomNavigationBar in flutter
complete sample code
Dartpad demo
If you prefer you can also depend on this package https://pub.dev/packages/navbar_router
Here's the resulting output of what the article helps you build
Navigator.of(context).pushNamedAndRemoveUntil(
routes[value], (route) => true);
I had to use true to enable back button.
NB: I was using Navigator.pushNamed() for navigation.
This is the code I am using in my project. If you try to avoid page viewer so you can try this
import 'package:flutter/material.dart';
class Dashboard extends StatefulWidget {
const Dashboard({Key? key}) : super(key: key);
#override
State<Dashboard> createState() => _DashboardState();
}
class _DashboardState extends State<Dashboard> {
int _selectedIndex = 0;
void _onItemTapped(int index) {
setState(() {
_selectedIndex = index;
});
}
#override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: const Text('Sample'),
),
body: SingleChildScrollView(
child: Column(
children: [
if (_selectedIndex == 0)
// you can call custom widget here
Column(
children: const [
Text("0"),
],
)
else if (_selectedIndex == 1)
Column(
children: const [
Text("1"),
],
)
else
Column(
children: const [
Text("2"),
],
),
],
),
),
bottomNavigationBar: BottomNavigationBar(
items: const <BottomNavigationBarItem>[
BottomNavigationBarItem(
icon: Icon(Icons.headphones),
label: 'Home',
),
BottomNavigationBarItem(
icon: Icon(Icons.business),
label: 'Business',
),
BottomNavigationBarItem(
icon: Icon(Icons.school),
label: 'School',
),
],
currentIndex: _selectedIndex,
selectedItemColor: Colors.amber[800],
unselectedItemColor: Colors.grey,
onTap: _onItemTapped,
),
);
}
}
Happy Coding