Cannot navigate to different screen using FCM onMessage - flutter

Question

I am trying to navigate to a different screen using Get when a user taps on the notification triggered from the onMessage function while the app is on foreground. So far I have not been able to do that.
Here's what I have done so far:
void initState(){
super.initState();
var initializationSettingsAndroid = AndroidInitializationSettings('#drawable/splash');
var initializationSettings = InitializationSettings(android:initializationSettingsAndroid);
flutterLocalNotificationsPlugin.initialize(initializationSettings);
FirebaseMessaging.onMessage.listen((RemoteMessage message) {
RemoteNotification notification = message.notification;
AndroidNotification android = message.notification?.android;
if (notification != null && android != null) {
flutterLocalNotificationsPlugin.show(
notification.hashCode,
notification.title,
notification.body,
NotificationDetails(
android: AndroidNotificationDetails(
channel.id,
channel.name,
channel.description,
icon: '#drawable/splash',
playSound: true
),
));
Get.to(OrdersScreen());
}
});
}
I get the notification but when I tap, nothing happens. I also get the following exception in the logs.
E/flutter (17567): [ERROR:flutter/lib/ui/ui_dart_state.cc(199)]
Unhandled Exception: You are trying to use contextless navigation
without E/flutter (17567): a GetMaterialApp or Get.key.
E/flutter (17567): If you are testing your app, you can use:
E/flutter (17567): [Get.testMode = true], or if you are running
your app on E/flutter (17567): a physical device or emulator,
you must exchange your [MaterialApp] E/flutter (17567): for a
[GetMaterialApp]. E/flutter (17567): E/flutter (17567): #0
GetNavigation.global package:get/…/src/extension_navigation.dart:1052
E/flutter (17567): #1 GetNavigation.to
package:get/…/src/extension_navigation.dart:511 E/flutter (17567): #2
_MyAppState.initState. package:flutter_complete_guide/main.dart:146 E/flutter (17567): #3
_rootRunUnary (dart:async/zone.dart:1362:47) E/flutter (17567): #4 _CustomZone.runUnary (dart:async/zone.dart:1265:19) E/flutter (17567): #5 _CustomZone.runUnaryGuarded (dart:async/zone.dart:1170:7) E/flutter (17567): #6 _BufferingStreamSubscription._sendData
(dart:async/stream_impl.dart:341:11) E/flutter (17567): #7
_DelayedData.perform (dart:async/stream_impl.dart:591:14) E/flutter (17567): #8 _StreamImplEvents.handleNext
(dart:async/stream_impl.dart:706:11) E/flutter (17567): #9
_PendingEvents.schedule. (dart:async/stream_impl.dart:663:7) E/flutter (17567): #10
_rootRun (dart:async/zone.dart:1346:47) E/flutter (17567): #11 _CustomZone.run (dart:async/zone.dart:1258:19) E/flutter (17567): #12 _CustomZone.runGuarded (dart:async/zone.dart:1162:7) E/flutter (17567): #13 _CustomZone.bindCallbackGuarded.
(dart:async/zone.dart:1202:23) E/flutter (17567): #14 _rootRun
(dart:async/zone.dart:1354:13) E/flutter (17567): #15
_CustomZone.run (dart:async/zone.dart:1258:19) E/flutter (17567): #16 _CustomZone.runGuarded (dart:async/zone.dart:1162:7) E/flutter (17567): #17 _CustomZone.bindCallbackGuarded.
(dart:async/zone.dart:1202:23) E/flutter (17567): #18
_microtaskLoop (dart:async/schedule_microtask.dart:40:21) E/flutter (17567): #19 _startMicrotaskLoop
(dart:async/schedule_microtask.dart:49:5) E/flutter (17567):
D/ViewRootImpl#874c66fMainActivity: stopped(false) old=false

Answer 1

I was able to do this using the navigatorkey.
Created the global key:
final GlobalKey<NavigatorState> navigatorKey = GlobalKey(debugLabel: "Main Navigator");
Initialized it in the MaterialApp:
MaterialApp(
navigatorKey: navigatorKey,
The used it inside onMessage function:
navigatorKey.currentState.push(
MaterialPageRoute(builder: (_) => OrdersScreen()));

Answer 2

to open a notification you have to use this
FirebaseMessaging.onMessageOpenedApp.listen((RemoteMessage message) {
// print('A new onMessageOpenedApp event was published!');
Get.to(OrdersScreen());
});