I am very new to Flutter so I apologize for not understanding all the terminology.
I have an application that receives data from FCM, and it shows a SnackBar (using Get). All of this is working well. The problem is the 'onTap'. When I use Get.toNamed(), it responds with,
Could not find a generator for route RouteSettings("/home-screen", null) in the _WidgetsAppState.
This is my current Snackbar
void showDialog(BuildContext context, messageJson) {
print('showDialog');
try {
final data = messageJson['data'];
final notification =
data != null && data.keys.isNotEmpty ? data : messageJson['notification'];
var body = notification['body'];
var title = notification['title'];
Get.snackbar(
title,
body,
icon: Icon(Icons.chat),
shouldIconPulse: true,
onTap: (index) {
Get.toNamed('/home-screen');
//Navigator.of(context).pushNamed('/home-screen'); // <-- Didn't work either
},
isDismissible: true,
duration: Duration(seconds: 4),
);
} catch (e) {
print(e.toString());
}
}
With my Routes being setup like this.
class Routes {
static final Map<String, WidgetBuilder> _routes = {
"/home-screen": (context) => HomeScreen(),
"/home": (context) => MainTabs(),
"/login": (context) => LoginScreen(),
"/register": (context) => RegistrationScreen(),
...VendorRoute.getAll(),
};
static Map<String, WidgetBuilder> getAll() => _routes;
static WidgetBuilder getRouteByName(String name) {
if (_routes.containsKey(name) == false) {
return _routes[RouteList.homeScreen];
}
return _routes[name];
}
static Route<dynamic> generateRoute(RouteSettings settings) {
switch (settings.name) {
case RouteList.storeDetail:
return MaterialPageRoute(
builder: VendorRoute.getRoutesWithSettings(settings)[settings.name],
);
default:
return null;
}
}
}
I'm at a standstill on trying to figure out how to navigate to a page onTap()
I have tried all the other variations as well. Any help would be appreciated here. Thanks!
REF: Flutter Get Package, https://pub.dev/packages/get
Did you set routes and onGenerateRoute inside MaterialApp? Here is an example https://flutter.dev/docs/cookbook/navigation/named-routes
Related
My app uses flutter with auto_router 0.6.9 package, and I want user to be able to type in a web address http://localhost/#/book/123 and be able to access book 123 and display book123, their name, and email if they are logged in. I had figured out the routing part with auto_router but when the user put the address directly into the browser, the arguments should be passed into the page are null.
I was wondering is there a way to parse the url and pass in the arguments required before displaying the page. Thanks for any help or hints!
My router.dart page:
#MaterialAutoRouter(
routes: <AutoRoute>[
// some other pages...
MaterialRoute(path: "/book/:id", page: MultiProvider),
],
)
class $ModularRouter {}
The router.gr.dart generated for multiprovider arguments class is:
/// MultiProvider arguments holder class
class MultiProviderArguments {
final Key key;
final List<SingleChildWidget> providers;
final Widget child;
final Widget Function(BuildContext, Widget) builder;
MultiProviderArguments(
{this.key, #required this.providers, this.child, this.builder});
}
My book menu page contains a navigation:
(this is an example of how I normally call the BookPage in another page)
child: GestureDetector(
onTap: () => ExtendedNavigator.of(context).push(
Routes.multiProvider(id: book[index].bookID),
arguments: MultiProviderArguments(
providers: [
Provider<UserData>.value(
value: userdata,
),
Provider<List<BookInfo>>.value(
value: book,
),
],
child: BookPage(
bookId: book[index].bookID,
name: userdata.userName,
email: userdata.email,
),
),
),
...
And BookPage takes in 3 arguments bookId, name and email:
class BookPage extends StatefulWidget {
final String bookId;
final String name;
final String email;
BookPage({
this.bookId,
this.name,
this.email,
});
...
}
...
class _BookPageState extends State<BookPage> {
...
Widget build(BuildContext context) {
final currentUser = Provider.of<UserData>(context, listen: false);
final currentBook = Provider.of<List<BookInfo>>(context, listen: false);
...
}
}
I had figured out a Band-Aid solution (which I don't consider to be permanent):
I had abandoned using auto-route which I have no idea how to parse the url and use onGenerateRoute instead:
onGenerateRoute: (settings) {
final settingsUri = Uri.parse(settings.name);
final user = Provider.of<User>(context);
if (user == null) {
return MaterialPageRoute(
builder: (context) {
return LogInPage();
}
);
} else {
// Handle '/'
if (settingsUri.pathSegments.length == 0) {
return MaterialPageRoute(
builder: (context) {
return PageWrapper(false, bookid);
}
);
}
// Handle '/book/:id'
if (settingsUri.pathSegments.length == 2) {
if (settingsUri.pathSegments.first != 'book') {
return MaterialPageRoute(
builder: (context) {
return UnknownPage();
}
);
}
final bookid = settingsUri.pathSegments.elementAt(1);
if (bookid == null) {
return MaterialPageRoute(
builder: (context) {
return UnknownPage();
}
);
}
return MaterialPageRoute(
builder: (context) {
return PageWrapper(false, bookid);
}
);
}
}
//Handle other unknown Routes
return MaterialPageRoute(
builder: (context) {
return UnknownPage();
}
);
}
The PageWrapper authenticates user, build providers, and call BookPage class, I put the code in a place where userData providers had already been initialized:
if (this.needRedirect == true) {
return Scaffold(
...
body: FutureBuilder(
future: Future.wait([userData]),
builder: (context, snapshot) {
return MultiProvider(
providers: [
//initialize using streamproviders
...
],
child: BookPage(
bookId: book[index].bookID,
name: userdata.userName,
email: userdata.email,
),
);
}),
);
}
else {...}
The short answer is I had called the WrapperPage in onGenerateRoutes because the providers are not initialized in main.dart, but they are initialized in WrapperPage. Then I put the redirect code after provider initialization in WrapperPage and called BookPage.
This method had caused other bugs, but it had achieved its purpose.
I'm working on a flutter application mainly for the web, and I'm unable to add/get the query
parameter from the URL, the query parameter will contain an id, and this id should be used inside the app
this my route setup on my app state:
return MaterialApp(navigatorKey: key, initialRoute: '/main',
routes: {
// When navigating to the "/" route, build the FirstScreen widget.
'/main': (context) => Map_View(),
// When navigating to the "/second" route, build the SecondScreen widget.
'/second': (context) => TaskClosed(),
},onGenerateRoute: RouteGenerator.generateRoute,);
}
class RouteGenerator{
static Route<dynamic> generateRoute(RouteSettings settings){
final args = settings.arguments;
print(args);
var routingData = settings.name;
}}
the settings.arguments are always null
so what should I pass to initialRoute to make it accept arguments on the first screen
for example, the calling URL should be like this:
https:example.com/main?123
so how to get this parameter from the URL
I tried this code:
class RouteGenerator {
static Route<dynamic> generateRoute(RouteSettings settings) {
String? route;
Map? queryParameters;
if (settings.name != null) {
var uriData = Uri.parse(settings.name!);
route = uriData.path;
queryParameters = uriData.queryParameters;
}
var message =
'generateRoute: Route $route, QueryParameters $queryParameters';
print(message);
return MaterialPageRoute(
builder: (context) {
return MyHomePage(title: message);
},
settings: settings,
);
}
}
class MyApp extends StatelessWidget {
#override
Widget build(BuildContext context) {
return MaterialApp(
title: 'Test App',
theme: ThemeData(
primarySwatch: Colors.blue,
),
initialRoute: '/main',
routes: {
// '/': (context) {
// print('route: /');
// return MyHomePage(title: 'Home');
// },
'/main': (context) {
print('route: /main');
return MyHomePage(title: 'route: Main');
},
'/second': (context) {
print('route: /second');
return MyHomePage(title: 'route: Second');
},
},
onGenerateRoute: RouteGenerator.generateRoute,
);
}
}
When I run the app with the URL http://localhost:55260/#/main?123, I get this output:
generateRoute: Route /, QueryParameters {}
generateRoute: Route /main, QueryParameters {123: }
The screen is displayed for /main and the URL is displayed correctly.
Sorry, I misunderstand the scenario. Here is my suggest
remove routes
return MaterialApp(navigatorKey: key, initialRoute: '/main',
//routes: {
// When navigating to the "/" route, build the FirstScreen widget.
//'/main': (context) => Map_View(),
// When navigating to the "/second" route, build the SecondScreen widget.
//'/second': (context) => TaskClosed(),
// },
onGenerateRoute: RouteGenerator.generateRoute,);
}
And change like
class RouteGenerator {
static Route<dynamic> generateRoute(RouteSettings settings) {
final args = settings.arguments;
print(args);
var routingData = settings.name;
switch (routingData) {
case "/main":
return MaterialPageRoute(
builder: (context) {
return Map_View();
},
settings: settings,
);
break;
case "/second":
return MaterialPageRoute(
builder: (context) {
return TaskClosed();
},
settings: settings,
);
break;
default:
return MaterialPageRoute(
builder: (context) {
return YouUnKnowPage();
},
settings: settings,
);
}
}
}
when you call Navigator.of(context).pushNamed("/main",arguments:"123");
It will move to TaskClosed and print 123 in the console
Furthermore, if you directly type the link like https:example.com/main?123
It will lead to YouUnKnowPage instead of Map_View and the arguments will be null. Try to use Navigator.of(context).pushNamed("/main",arguments:"123");
If you insist on directly type the link, you can try this
class RouteGenerator {
static Route<dynamic> generateRoute(RouteSettings settings) {
String routingData;
var arguments;
if (settings.name != null) {
routingData = settings.name;
}
final args = settings.arguments;
if (args != null) {
arguments = args;
} else {
Uri settingsUri = Uri.parse(settings.name);
if (settingsUri.hasQuery) {
arguments = "${settingsUri.queryParameters}";
}
if (settingsUri.pathSegments.length > 1) {
routingData =
"/" + settingsUri.pathSegments[settingsUri.pathSegments.length - 1];
}
}
if (arguments != null) {
print(arguments);
}
switch (routingData) {
case "/main":
return MaterialPageRoute(
builder: (context) {
return Map_View();
},
settings: settings,
);
break;
case "/second":
return MaterialPageRoute(
builder: (context) {
return TaskClosed();
},
settings: settings,
);
break;
default:
return MaterialPageRoute(
builder: (context) {
return YouUnKnowPage();
},
settings: settings,
);
}
}
}
Now it will move to TaskClosed and print {123:} in the console
Upon successful signup, I am trying to send users to the homepage (home) explaining how to use the app. I am doing so through this code block on my signup.dart
onPressed: () async {
try {
User user =
(await FirebaseAuth.instance.createUserWithEmailAndPassword(
email: _emailController.text,
password: _passwordController.text,
))
.user;
if (user != null) {
user.updateProfile(displayName: _nameController.text);
Navigator.of(context).pushNamed(AppRoutes.home);
}
}
Which is pointing to the home route
class AppRoutes {
AppRoutes._();
static const String authLogin = '/auth-login';
static const String authSignUp = '/auth-signup';
static const String home = '/home';
static Map<String, WidgetBuilder> define() {
return {
authLogin: (context) => Login(),
authSignUp: (context) => SignUp(),
home: (context) => Home(),
};
}
}
However, when I sign up, the data is rendering in firebase, but the user is not being sent to the home page, and throws this error in my console
Make sure your root app widget has provided a way to generate
this route.
Generators for routes are searched for in the following order:
1. For the "/" route, the "home" property, if non-null, is used.
2. Otherwise, the "routes" table is used, if it has an entry for the route.
3. Otherwise, onGenerateRoute is called. It should return a non-null value for any valid route not handled by "home" and "routes".
4. Finally if all else fails onUnknownRoute is called.
Unfortunately, onUnknownRoute was not set.
Any thoughts on how to rectify?
Have you added onGenerateRoute in your MaterialApp? Like this:
class MyApp extends StatelessWidget {
#override
Widget build(BuildContext context) {
return MaterialApp(
onGenerateRoute: Router.generateRoute,
initialRoute: yourRoute,
child: YouApp(),
);
}
}
class Router {
static Route<dynamic> generateRoute(RouteSettings settings) {
switch (settings.name) {
case AppRoutes.home:
return MaterialPageRoute(builder: (_) => Home());
case AppRoutes.authLogin:
return MaterialPageRoute(builder: (_) => Login());
case AppRoutes.authSignUp:
return MaterialPageRoute(builder: (_) => SignUp());
default:
return MaterialPageRoute(
builder: (_) => Scaffold(
body: Center(
child: Text('No route defined for ${settings.name}')),
));
}
}
}
}
}
I use Firebase dynamic links and also named routes. What I want is to install a global listener for the dynamic link events and forward to register page if a token is provided. In the code below I got the exception The context used to push or pop routes from the Navigator must be that of a widget that is a descendant of a Navigator widget. which means I have to put navigation code below the home: property of MaterialApp. But when doing this I had to implement the dynamic links event handler for earch route.
class MyApp extends StatelessWidget {
String title = "Framr";
#override
Widget build(BuildContext context) {
FirebaseDynamicLinks.instance.onLink(
onSuccess: (linkData) {
if (linkData != null) {
try {
Navigator.pushNamed(context, '/register', arguments: linkData);
// throws: The context used to push or pop routes from the Navigator must be that of a widget that is a descendant of a Navigator widget.
} catch(e) {
print(e);
}
}
return null;
}
);
return MaterialApp(
title: "...",
home: LoginPage(),
routes: {
'/createEvent': (context) => CreateEventPage(),
'/showEvent': (context) => ShowEventPage(),
'/register': (context) => RegisterPage(),
},
);
}
}
I was able to get this work by following the example provided from the dynamic link README with the use of the no_context_navigation package or GlobalKey to workaround around the lack of context to call Navigator.pushNamed(...). Note: You don't have to use no_context_navigation. You can implement the no context routing yourself. Here's an example.
// Add this
import 'package:no_context_navigation/no_context_navigation.dart';
void main() {
runApp(MaterialApp(
title: 'Dynamic Links Example',
// Add this
navigatorKey: NavigationService.navigationKey,
routes: <String, WidgetBuilder>{
'/': (BuildContext context) => MyHomeWidget(), // Default home route
'/helloworld': (BuildContext context) => MyHelloWorldWidget(),
},
));
}
class MyHomeWidgetState extends State<MyHomeWidget> {
.
.
.
#override
void initState() {
super.initState();
this.initDynamicLinks();
}
void initDynamicLinks() async {
FirebaseDynamicLinks.instance.onLink(
onSuccess: (PendingDynamicLinkData dynamicLink) async {
// Add this.
final NavigationService navService = NavigationService();
final Uri deepLink = dynamicLink?.link;
if (deepLink != null) {
// This doesn't work due to lack of context
// Navigator.pushNamed(context, deepLink.path);
// Use this instead
navService.pushNamed('/helloworld', args: dynamicLink);
}
},
onError: (OnLinkErrorException e) async {
print('onLinkError');
print(e.message);
}
);
final PendingDynamicLinkData data = await FirebaseDynamicLinks.instance.getInitialLink();
final Uri deepLink = data?.link;
if (deepLink != null) {
// This doesn't work due to lack of context
// Navigator.pushNamed(context, deepLink.path);
// Use this instead
navService.pushNamed('/helloworld', args: dynamicLink);
}
}
.
.
.
}
// pubspec.yaml
no_context_navigation: ^1.0.4
I'm building a web-app which needs to have a route that gets a post ID and then it will fetch the post using the ID.
How can I have URL arguments let's say /post/:id so id is the argument
My app looks like that currently:
class MyApp extends StatelessWidget {
#override
Widget build(BuildContext context) {
return MaterialApp(
// title: "Paste",
initialRoute: "/",
theme: ThemeData(
primarySwatch: Colors.green,
primaryColor: Colors.blue
),
routes: {
"/": (context) => HomePage(),
"/post": (context) => PastieRoute()
},
debugShowCheckedModeBanner: false
);
}
}
EDIT:
This is what I tried according to #BloodLoss and for some reason I don't get anything to the console when accessing localhost:8080/post?id=123
class MyApp extends StatelessWidget {
#override
Widget build(BuildContext context) {
return MaterialApp(
initialRoute: "/",
routes: {
"/": (context) => HomePage(),
"/post": (context) => PastieRoute()
},
onGenerateRoute: (settings) {
if (settings.name == "/post") {
print(settings.arguments); // Doesn't fire :(
return MaterialPageRoute(
builder: (context) {
// TODO
}
);
}
},
debugShowCheckedModeBanner: false
);
}
}
tl;dr
//in your example: settings.name = "/post?id=123"
final settingsUri = Uri.parse(settings.name);
//settingsUri.queryParameters is a map of all the query keys and values
final postID = settingsUri.queryParameters['id'];
print(postID); //will print "123"
Drilldown
In a perfect world you would access queryParameters with Uri.base.queryParameters because:
Uri.base
Returns the natural base URI for the current platform.
When running in a browser this is the current URL of the current page (from window.location.href).
When not running in a browser this is the file URI referencing the current working directory.
But currently there is an issue in flutter where you have #/ in your path which messes the Uri.base interpretation of the Uri.
Follow the issue #33245 until this matter is addressed and you will be able to use Uri.base.queryParameters
please follow this link further information https://flutter.dev/docs/cookbook/navigation/navigate-with-arguments
on your MaterialApp
onGenerateRoute: (settings) {
// If you push the PassArguments route
if (settings.name == PassArgumentsScreen.routeName) {
// Cast the arguments to the correct type: ScreenArguments.
final ScreenArguments args = settings.arguments;
// Then, extract the required data from the arguments and
// pass the data to the correct screen.
return MaterialPageRoute(
builder: (context) {
return PassArgumentsScreen(
title: args.title,
message: args.message,
);
},
or you can nativate like web using this plugin fluro
This is how I did it. You can edit it as per your requirements. If you want to use ?q= then use the split by or regex accordingly
Here is the example of both passing in argument as well as passing in url as /topic/:id
Route<dynamic> generateRoute(RouteSettings settings) {
List<String> pathComponents = settings.name.split('/');
final Map<String, dynamic> arguments = settings.arguments;
switch ("/"+pathComponents[1]) {
case shareTopicView:
return MaterialPageRoute(
builder: (context) => TopicPageLayout(topicID: pathComponents[2]));
case internalTopicView:
return MaterialPageRoute(
builder: (context) => TopicPageLayout(topicID: arguments['topicID']));
default:
return MaterialPageRoute(builder: (context) => LandingPage());
}
}
I'm new to Flutter, and I found a quirky workaround,...
import 'dart:html';
String itemID;
//My url looks like this,... http://localhost:57887/#item_screen/12345
//Counted 13 characters for '#item_screen/' then got the substring as below
itemID = window.location.hash.substring(13);
print(itemID) //12345
Not very sophisticated, but worked :-D
Add flutter_modular to your flutter web project.
current version: flutter_modular: ^3.1.1
Read dynamic routes section in: https://pub.dev/packages/flutter_modular#dynamic-routes
Example for the URL /post?id=123
Create your main widget with a MaterialApp and call the ´´´MaterialApp().modular()´´´ method.
// app_widget.dart
import 'package:flutter/material.dart';
import 'package:flutter_modular/flutter_modular.dart';
class AppWidget extends StatelessWidget {
#override
Widget build(BuildContext context) {
return MaterialApp(
initialRoute: "/",
).modular();
}
}
Create your project module file extending Module:
// app_module.dart
class AppModule extends Module {
#override
final List<Bind> binds = [];
#override
final List<ModularRoute> routes = [
ChildRoute('/', child: (_, __) => HomePage()),
ChildRoute('/post', child: (_, args) => PostPage(id: args.queryParams['id'])),
];
}
3.In main.dart file, wrap the main module in ModularApp to initialize it with Modular:
// main.dart
import 'package:flutter/material.dart';
import 'package:flutter_modular/flutter_modular.dart';
import 'app/app_module.dart';
void main() => runApp(ModularApp(module: AppModule(), child: AppWidget()));
And here is another way to do it:
My url pattern: www.app.com/#/xLZppqzSiSxaFu4PB7Ui
onGenerateRoute: (settings) {
List<String> pathComponents = settings.name.split('/');
if (pathComponents[1] == 'invoice') {
return MaterialPageRoute(
builder: (context) {
return Invoice(arguments: pathComponents.last);
},
);
} else
return MaterialPageRoute(
builder: (context) {
return LandingPage();
},
);
;
},
Here's a workaround that uses the 'default' route as my main route.
I did this because it seems to be the only way that Flutter will allow me to open a URL with an ID in it, that doesn't return a 404.
E.g. Flutter does not seem to respect the '?' separator. So a URL with an ID in it, is read by flutter as an unknown URL. E.g. site.com/invoice?id=999 will return a 404, even in /invoice is set up as route.
My goal: I have a 1-page web app that simply displays a single invoice at a time, which corresponds to the ID in the URL.
My URL
app.com/#/xLZppqzSiSxaFu4PB7Ui
The number at the end of the URL is a FireStore Doc ID.
Here's the code in MyApp:
onGenerateRoute: (settings) {
List<String> pathComponents = settings.name.split('/');
switch (settings.name) {
case '/':
return MaterialPageRoute(
builder: (context) => Invoice(),
);
break;
default:
return MaterialPageRoute(
builder: (context) => Invoice(
arguments: pathComponents.last,
),
);
}
},
This sends 'xLZppqzSiSxaFu4PB7Ui' to the 'Invoice' widget.
Try onGenerateRoute with below sample
final info = settings.arguments as Mediainfo?;
settings = settings.copyWith(
name: settings.name! + "?info=" + info!.name, arguments: info);
return MaterialPageRoute(
builder: (_) => MediaDetails(info: info), settings: settings);
This was my solution:
First, kind of seperate, I have an abstract class, AppRoutes, which is just a collection of string-routes, that way they're easily maintainable and switchable.
abstract class AppRoutes {
static const String guestGetMember = "/guest_getMember";
...
static render(String url, {Map<String, dynamic>? params}) {
return Uri(path: url, queryParameters: params ?? {}).toString();
}
}
Now for the code:
Route<dynamic> generateRoute(RouteSettings settings) {
Uri uri = Uri.parse(settings.name ?? "");
Map<String, dynamic> params = {};
// Convert numeric values to numbers. This is optional.
// You can instead `int.parse` where needed.
uri.queryParameters.forEach((key, value) {
params[key] = int.tryParse(value) ?? value;
});
final Map<dynamic, dynamic> arguments = (settings.arguments ?? {}) as Map<dynamic, dynamic>;
return MaterialPageRoute(builder: (context) {
switch (uri.path) {
case AppRoutes.guestGetMember:
return CardGuestViewProfile(memberID: params['memberID']!);
case AppRoutes...:
return...;
default:
return AppScreen();
}
// Navigator routes update web URLs by default,
// while `onGeneratedRoute` does not. That last
// line forces it to. The whole of using url
// variables for me was so that certainly URLs
// were easily copiable for sharing.
}, settings: (RouteSettings(name: settings.name)));
}
And then I call it with
Navigator.pushNamed(context,
AppRoutes.render(AppRoutes.guestGetMember,
params: {'memberID': memberID.toString()}),
arguments: {}));
params will be easily visible to web-users because it's a URL variable, while arguments will not be. This of course doesn't mean that arguments is by any means secure, it just means that non-essential information can be passed through this.