How do you navigate to a new screen in Flutter?
These questions are similar, but are asking more than I am.
I am adding an answer below.
Navigator.of(context).push(MaterialPageRoute(builder: (context) => NewScreen()));
where context is the BuildContext of a widget and NewScreen is the name of the second widget layout.
main.dart
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: HomeScreen(),
);
}
}
class HomeScreen extends StatelessWidget {
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(title: const Text('Home Screen')),
body: Center(
child: ElevatedButton(
child: const Text(
'Navigate to a new screen >>',
style: TextStyle(fontSize: 24.0),
),
onPressed: () {
_navigateToNextScreen(context);
},
),
),
);
}
void _navigateToNextScreen(BuildContext context) {
Navigator.of(context).push(MaterialPageRoute(builder: (context) => NewScreen()));
}
}
class NewScreen extends StatelessWidget {
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(title: const Text('New Screen')),
body: const Center(
child: Text(
'This is a new screen',
style: TextStyle(fontSize: 24.0),
),
),
);
}
}
To load new screens with Flutter pre-canned animations, use their respective transition classes. For example:
Container Transformation
Basically we have the first widget or screen transform into the next screen. For this we need to use OpenContainer. The following code illustrates an item in a ListView transformed to its details page.
@override
Widget build(BuildContext context) {
return Card(
color: Colors.white,
elevation: 2.0,
child: OpenContainer(
transitionType: ContainerTransitionType.fadeThrough,
closedColor: Theme.of(context).cardColor,
closedElevation: 0.0,
openElevation: 4.0,
transitionDuration: Duration(milliseconds: 1500),
openBuilder: (BuildContext context, VoidCallback _) => THENEXTSCREEN(),
closedBuilder: (BuildContext _, VoidCallback openContainer) {
return ListTile(
leading: Icon(Icons.album),
title: Text("ITEM NAME"),
);
},
),
);
}
Shared Axis
This transition is similar to that in Tab or Stepper. We need SharedAxisTransition, PageTransitionSwitcher, along with a state to model transition between active and previous page. If we only switch between two pages we can use a simple boolean isFirstPage for it. Here's the snippet with Provider as state management:
@override
Widget build(BuildContext context) {
return Consumer<YourState>(
builder: (context, state, child) {
return PageTransitionSwitcher(
duration: const Duration(milliseconds: 1500),
reverse: !state.isFirstPage, // STATE
transitionBuilder: (
Widget child,
Animation<double> animation,
Animation<double> secondaryAnimation,
) {
return SharedAxisTransition(
child: child,
animation: animation,
secondaryAnimation: secondaryAnimation,
transitionType: SharedAxisTransitionType.horizontal,
);
},
child: state.isFirstPage? FIRSTPAGE() : SECONDPAGE(), // STATE
);
},
);
}
Note that in all these scenarios we don't use Navigator and MaterialPageRoute. All these codes are derived from animations repo so you may want to check it out first.
Navigate to next screen with back using Navigator.push()
Navigator.push(
context,
MaterialPageRoute(builder: (context) => SecondRoute()),);
Navigate to next screen without back using Navigator.pushReplacement()
Navigator.pushReplacement(
context,MaterialPageRoute(builder: (context) => SecondRoute()),);
onTap: () {
Navigator.push(context,
MaterialPageRoute(builder: (context) => NextScreenName()));
}
If you are familiar with web development this approach is similar to routing.
main.dart
void main() {
setupLocator();
runApp(MyApp());
}
class MyApp extends StatelessWidget {
@override
Widget build(BuildContext context) {
return MaterialApp(
title: 'Flutter Demo',
routes: {
'/' : (BuildContext context)=>HomePage(),
'/register' : (BuildContext context)=>RegisterPage(),
},
);
}
}
You can add button onPressed event from the homepage.dart to navigate register.dart as follows.
onPressed: (){
Navigator.pushReplacementNamed(context, '/register');
},
Here is a full example of routes push / pop:
import 'package:flutter/material.dart';
void main() {
runApp(MyApp());
}
class MyApp extends StatelessWidget {
@override
Widget build(BuildContext context) {
return MaterialApp(
title: 'Flutter Routes',
routes: {
'/login': (BuildContext context) => Login(),
// add another route here
// '/register': (BuildContext context) => Register(),
},
theme: ThemeData(
primarySwatch: Colors.blue,
visualDensity: VisualDensity.adaptivePlatformDensity,
),
home: MyHomePage(title: 'Flutter Routes'),
);
}
}
class MyHomePage extends StatefulWidget {
MyHomePage({Key key, this.title}) : super(key: key);
final String title;
@override
_MyHomePageState createState() => _MyHomePageState();
}
class _MyHomePageState extends State<MyHomePage> {
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text(widget.title),
),
body: Center(
child: Column(
mainAxisAlignment: MainAxisAlignment.center,
children: [
RaisedButton(
onPressed: () {
// This gives the back button:
Navigator.of(context).pushNamed('/login');
// This doesn't give the back button (it replaces)
//Navigator.pushReplacementNamed(context, '/login');
},
child: Text('Login'),
),
],
),
),
);
}
}
class Login extends StatefulWidget {
@override
_LoginState createState() => _LoginState();
}
class _LoginState extends State<Login> {
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text('Login Page'),
),
body: Center(
child: RaisedButton(
onPressed: () {
// This will only work for pushNamed
Navigator.of(context).pop();
},
child: Text('Go back'),
),
));
}
}
you can use that way in your build widget
onTap: () { Navigator.of(context).push(MaterialPageRoute( builder: (context) => NewScreen()));},
You can try with the following code
Navigator.pushReplacement(context, MaterialPageRoute(builder: (context) => YourNextScreen())),
I found a good tutorial that I have followed along, it is very comprehensive with screenshots and step by step, you can also download the code and just run it. Very helpful for me learning Flutter especially I am totally a begineer.
https://medium.com/@misterflutter/lesson-5-creating-new-screens-f740994190c7
In formal method :
Navigator.push(context, MaterialPageRoute(builder: (context)=>Second()));
In GetX method :
Get.to(Second());
If we can navigate screen into another page and delete current page from stack then we can use method which is define below :
Get.off(Third());
If we can navigate screen into another page and delete all route or page from stack then we can use the method which is define below :
Get.offAll(Third());
If we want to use Navigator.pop() then GetX give a Method which is define below :
Get.back();
This way you can present the next screen
Navigator.of(context).push(
MaterialPageRoute(fullscreenDialog: true,
builder: (context) => const NewScreen(),
),
);
FloatingActionButton(
onPressed: (){
Navigator.of(context).push(MaterialPageRoute(builder: (context) => const AddUser()));
},
child: const Icon(Icons.add),
),