[MacOS] MissingPluginException(No implementation found for method getAll on channel dev.fluttercommunity.plus/package_info)

[GyuriMajercsik]

I would like to use a single package on all platforms (Android, iOS, MacOS, Web) for getting the app version. It seems that package_info_plus should support it.

Maybe I am doing something wrong or there is a bug in the package but I get the following:

AsyncSnapshot<PackageInfo>(ConnectionState.done, null, MissingPluginException(No implementation found for method getAll on channel dev.fluttercommunity.plus/package_info), #0      MethodChannel._invokeMethod (package:flutter/src/services/platform_channel.dart:156:7)
<asynchronous suspension>
#1      MethodChannel.invokeMapMethod (package:flutter/src/services/platform_channel.dart:358:43)
<asynchronous suspension>
#2      MethodChannelPackageInfo.getAll (package:package_info_plus_platform_interface/method_channel_package_info.dart:13:17)
<asynchronous suspension>
#3      PackageInfo.fromPlatform (package:package_info_plus/package_info_plus.dart:66:26)
<asynchronous suspension>
#4      _FutureBuilderState._subscribe.<anonymous closure> (package:flutter/src/widgets/async.dart)
<asynchronous suspension>
)

[GyuriMajercsik]

As a temporary solution I used both packages: package_info and package_info_plus, in the following way:

import 'package:package_info/package_info.dart'
    if (dart.library.html) 'package:package_info_plus/package_info_plus.dart';

[miquelbeltran]

Hi @GyuriMajercsik why are you using package_info and package_info_plus at the same time? is there something that package_info_plus cannot do that package_info can? The issue to me seems that you are using package_info on MacOS instead of package_info_plus.

[GyuriMajercsik]

Hi @miquelbeltran , thanks for the quick response.

It seems that package_info_plus doesn't work on MacOS, at least for me. I receive the above error.

[miquelbeltran]

Thanks for the clarification! The plugin works for me when I run the example on MacOS.

[GyuriMajercsik]

I tried in a test app and indeed, it is related to the fact that I have package_info as well in my dependencies. The problem is that I can't remove it because it is a transitive dependency....
I also noticed this error before the exception I already mentioned:

objc[98243]: Class FLTPackageInfoPlugin is implemented in both 
/Users/gyuri/work/upwork/testing_project/build/macos/Build/Products/Debug/testing_project.app/Contents/Frameworks/package_info_plus_macos.framework/Versions/A/package_info_plus_macos (0x103364718) 
and /Users/gyuri/work/upwork/testing_project/build/macos/Build/Products/Debug/testing_project.app/Contents/Frameworks/package_info.framework/Versions/A/package_info (0x103353718). 
One of the two will be used. Which one is undefined.

I'm not sure if this is a bug but the exception is misleading.

[miquelbeltran]

I see! yes, the error is very relevant. Since package_info also has MacOS support there's a collision in the class name. The solution would be to rename the FLTPackageInfoPlugin class to FLTPackageInfoPlusPlugin in the package_info_plus project.

I currently don't have time to do the change, but a PR with the fix would be highly appreciate and I can help reviewing it.

[GyuriMajercsik]

@miquelbeltran , I created a pull request for this: #215

[GyuriMajercsik]

The issue was fixed, merged and released. Closing.

[pinkasey]

I'm still getting this in package_info_plus: 1.3.0, when I run widfet-tests:

00:06 +1 -4: /Users/eyalpinkas/Projects/challenge22app/test/lang_ext/utils_test.dart: isLink [E]                                            
  MissingPluginException(No implementation found for method getAll on channel dev.fluttercommunity.plus/package_info)
  package:flutter/src/services/platform_channel.dart 154:7  MethodChannel._invokeMethod

I've checked in FLTPackageInfoPlusPlugin.h in the package's source -
I see:

@interface FLTPackageInfoPlusPlugin : NSObject <FlutterPlugin>

So I believe I have the fix in @GyuriMajercsik 's PR.
Also, I've checked my pubspec.lock - I don't have a dependency on package_info (not even transitive).

flutter doctor:

Flutter 2.5.3 • channel stable • https://github.com/flutter/flutter
Framework • revision 18116933e7 (2 weeks ago) • 2021-10-15 10:46:35 -0700
Engine • revision d3ea636dc5
Tools • Dart 2.14.4

Running flutter doctor...
Doctor summary (to see all details, run flutter doctor -v):
[✓] Flutter (Channel stable, 2.5.3, on macOS 11.6 20G165 darwin-x64, locale en-IL)
[!] Android toolchain - develop for Android devices (Android SDK version 30.0.2)
    ✗ cmdline-tools component is missing
      Run `path/to/sdkmanager --install "cmdline-tools;latest"`
      See https://developer.android.com/studio/command-line for more details.
    ✗ Android license status unknown.
      Run `flutter doctor --android-licenses` to accept the SDK licenses.
      See https://flutter.dev/docs/get-started/install/macos#android-setup for more details.
[✓] Xcode - develop for iOS and macOS
[✓] Android Studio (version 4.2)
[✓] IntelliJ IDEA Community Edition (version 2019.2.4)
[✓] VS Code (version 1.58.2)

I think it might have to do with flutter version (2.5.3) -
at the same time, I've upgraded flutter from 2.2.2 to 2.5.3, and migrated from package_info to package_info_plus

help?

(@odedstr FYI)

[Devenom1]

The same issue that @pinkasey mentioned happened with me too. After trying multiple options like re-building the app and re-opening the emulator it started working. I'm running it on MacOS too. This should be looked into at some point

[tripbnb66]

This problem is still there and below is the result of flutter doctor in my development environment.

[✓] Flutter (Channel stable, 2.5.3, on macOS 11.4 20F71 darwin-x64, locale zh-Hant-TW)
[✓] Android toolchain - develop for Android devices (Android SDK version 30.0.2)
[✓] Xcode - develop for iOS and macOS
[✗] Chrome - develop for the web (Cannot find Chrome executable at /Applications/Brave Browser.app/Contents/MacOS/Brave Browser)
    ! /Applications/Brave Browser.app/Contents/MacOS/Brave Browser is not executable.
[✓] Android Studio (version 2020.3)
[✓] VS Code (version 1.64.1)
[✓] Connected device (2 available)

I fixed it with a temporary solution.
I suggested to reopen this bug and dig this problem again.
Thank you.

PackageInfo? packageInfo;
  var appVersion = '';
  var appBuildNumber = '';

@override
  void initState() {
    super.initState();
    getPackage();
  }

void getPackage() async {
    try {
      packageInfo = await PackageInfo.fromPlatform();
      appVersion = packageInfo!.version;
      appBuildNumber = packageInfo!.buildNumber;
    } catch (e, stack) {
      print(e);
      print(stack);
    }
  }

(appVersion == '' ? Text('') : Text(appVersion + '+' + appBuildNumber)),