Try correcting the name to the name of an existing method, or defining a method named 'handleSystemMessage'. PaintingBinding.instance.handleSystemMessage({'type': 'fontsChange'});

[newtonmunene99]

Compiler message:
../../../flutter/.pub-cache/hosted/pub.dartlang.org/google_fonts-0.1.1/lib/src/google_fonts_base.dart:105:28: Error: The method 'handleSystemMessage' isn't defined for the class 'PaintingBinding'.

• 'PaintingBinding' is from 'package:flutter/src/painting/binding.dart' ('../../../flutter/packages/flutter/lib/src/painting/binding.dart').
  Try correcting the name to the name of an existing method, or defining a method named 'handleSystemMessage'.
  PaintingBinding.instance.handleSystemMessage({'type': 'fontsChange'});
  ^^^^^^^^^^^^^^^^^^^
  Compiler failed on /home/munene/Projects/Flutter/echo/lib/main.dart

[codediodeio]

Also ran into this issue, running flutter upgrade fixed it.

[newtonmunene99]

@codediodeio what version of flutter are you running after flutter upgrade? It didn't work for me

[RafaelR7]

I´m having the same problem, my flutter version is STABLE v1.9.1+hotfix.6, I will change to the beta that way ahead, it is on v1.12.13+hotfix.5, and see if the error still persists

[codediodeio]

I'm testing on Flutter 1.12.13+hotfix.5, works on iOS/Android.

[RafaelR7]

the stable version was upgraded to v1.12.13+hotfix.5 today, I just upgrade my version everything is working now.

[newtonmunene99]

It's resolved after upgrading

[Sarps]

flutter upgrade worked for me too. Thanks @codediodeio

[AlvaroStudy]

I just ran flutter upgrade and all the working projects currently stopped working

[TEJESH5210]

the stable version was upgraded to v1.12.13+hotfix.5 today, I just upgrade my version everything is working now.

how to upgrade can u tell me

[TulioPintoNeto]

the stable version was upgraded to v1.12.13+hotfix.5 today, I just upgrade my version everything is working now.

how to upgrade can u tell me

Just enter the command "flutter upgrade" in your terminal console (check if you're in your correct folder application to do that)

[anantraj2808]

1. Run "flutter pub outdated". This will tell you all the outdated packages your project is using.
2. Then run "flutter pub upgrade --major-versions". This will upgrade all the outdated version.
   This helped me.

[Deep052697]

Flutter Upgrade doesn't work, anyone have a different solution?

[Deep052697]

../.pub-cache/hosted/pub.dartlang.org/audio_service-0.17.1/lib/audio_service.dart:675:16: Error: The method 'setMockMethodCallHandler' isn't defined for the class 'MethodChannel'.
- 'MethodChannel' is from 'package:flutter/src/services/platform_channel.dart' ('../Development/flutter/packages/flutter/lib/src/services/platform_channel.dart').
Try correcting the name to the name of an existing method, or defining a method named 'setMockMethodCallHandler'.
.setMockMethodCallHandler(handler);
^^^^^^^^^^^^^^^^^^^^^^^^
../.pub-cache/hosted/pub.dartlang.org/audio_service-0.17.1/lib/audio_service.dart:1266:68: Error: The method 'setMockMethodCallHandler' isn't defined for the class 'MethodChannel'.
- 'MethodChannel' is from 'package:flutter/src/services/platform_channel.dart' ('../Development/flutter/packages/flutter/lib/src/services/platform_channel.dart').
Try correcting the name to the name of an existing method, or defining a method named 'setMockMethodCallHandler'.
MethodChannel('ryanheise.com/audioServiceBackgroundInverse').setMockMethodCallHandler(handler);

[anantraj2808]

Flutter Upgrade doesn't work, anyone have a different solution?

Mentioned one possible solution above. Please check

[sushanmagar]

I had this issue while navigating to next page.
Reason:- No automatic import.
Solution: - I imported the page manually.

[SezDeep]

Solved it by creating this functions then passing the image location/name
Image image(String name) { return Image.asset(name); }

[dhanushkakavinda]

flutter upgrade is the perfect answer for this issue

[samvolton]

did not work, it does not get info from the class

[vikas960188]

1. Run "flutter pub outdated". This will tell you all the outdated packages your project is using.
2. Then run "flutter pub upgrade --major-versions". This will upgrade all the outdated version.
   This helped me.

it is not working ..