Where to handle Firebase Dynamic Links in Flutter? - flutter

Question

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(),
},
);
}
}

Answer 1

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