flutter_secure_storage: MissingPluginException(No implementation found for method write on channel plugins.it_nomads.com/flutter_secure_storage)

Uninstalling and installing the app works for me

The solution based on https://github.com/mogol/flutter_secure_storage/issues/71#issuecomment-532334622 is to uninstall the app. Works for me.

Hi, I have installed this plugin, and I have the same issue. I tried unistalling the app, but it does not work. Is there a workaround for this issue?

thank you in advance

Something as simple as this fails to work for me.

test('secure storage', () async {
    final storage = new FlutterSecureStorage();
    String? value = await storage.read(key: "access");
    expect(value, "");
  });

MissingPluginException(No implementation found for method read on channel plugins.it_nomads.com/flutter_secure_storage)

It turned out that most probably the problem is that the plugin does not register itself when it has no Activity Context. Can you please provide a method to register the plugin in the application context to be able to access it without UI.

Work manager issue

I have a similar problem. I would like to access the secure storage while the app is in the background. I use the workmanager package.

Initialization: Workmanager.initialize(callbackDispatcher, isInDebugMode: true);

The callbackDispatcher method:

void callbackDispatcher() {
  Workmanager.executeTask((task, inputData) async {
    switch (task) {
      case Workmanager.iOSBackgroundTask:
        try {
          var secureStorage = FlutterSecureStorage();
          String value = await secureStorage.read(key: "aKey");
          Log.i("callbackDispatcher ... $value.");
        } catch (e, s) {
          Log.e("$e ... $s.");
        }
        break;
    }
    return Future.value(true);
  });
}

However, I always receive the following exception when I simulate the background fetch.

MissingPluginException(No implementation found for method read on channel plugins.it_nomads.com/flutter_secure_storage) ... 
#0      MethodChannel.invokeMethod (package:flutter/src/services/platform_channel.dart:319:7)<…>
#1      FlutterSecureStorage.read (package:flutter_secure_storage/flutter_secure_storage.dart:29:41)<…>
#2      callbackDispatcher.<anonymous closure> (package:myapp/src/app.dart:92:46)<…>
#3      Workmanager.executeTask.<anonymous closure> (package:workmanager/src/workmanager.dart:80:28)<…>
#4      MethodChannel._handleAsMethodCall (package:flutter/src/services/platform_channel.dart:402:55)<…>
#5      MethodChannel.setMethodCallHandler.<anonymous closure> (package:flutter/src/services/platform_channel.dart:370:54)<…>
#6      _DefaultBinaryMessenger.handlePlatformMessage (package:flutter/src/services/binding.dart:200:33)<…>
#7      _invoke3.<anonymous closure> (dart:ui/hooks.dart:303:15)<…>
#8      _rootRun (dart:async/zone.dart:1124:13)<…>
#9      _CustomZone.run (dart:async/zone.dart:1021:19)<…>
#10     _CustomZone.runGuarded (dart:async/zone.dart:923:7)<…>
#11     _invoke3 (dart:ui/hooks.dart:302:10)<…>
#12     _dispatchPlatformMessage (dart:ui/hooks.dart:162:5)<…>

@8fdafs2 Try the no-shrink flag. I resolved the MissingPluginException with the no-shrink flag. https://flutter.dev/docs/deployment/android#shrinking-your-code-with-r8

It should not work. No plugins are available in test environment. You can mocks for test purpose

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On Thu, May 13, 2021 at 21:55, Abhinav Singh @.***> wrote:

Something as simple as this fails to work for me.

test(‘secure storage’, () async { final storage = new FlutterSecureStorage(); String? value = await storage.read(key: “access”); expect(value, “”); });

MissingPluginException(No implementation found for method read on channel plugins.it_nomads.com/flutter_secure_storage)

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facing problem in google pixel 3a.

Same here, user reported this problem on Moto e5, Android 8.0

thanks, this was affecting me in widget test

Yeah @nikhil-s-b, I create in:

• https://github.com/felipecastrosales/good_app/blob/tdd/test/data/storage/flutter_secure_storage/flutter_secure_storage_local_storage_impl_test.dart

I hope it helps. 😃

@felipecastrosales This is great! Thanks

@8fdafs2 Try the no-shrink flag. I resolved the MissingPluginException with the no-shrink flag. https://flutter.dev/docs/deployment/android#shrinking-your-code-with-r8

Many thanks! The problem disappears by using this workaround! But I think this is not a final solution as people may still need to ‘shrink code’. And I am worrying about whether or not Google will try to shrink the uploaded appbundle automatically to re-introduce this issue. Anyway, some progress has been made!

Uninstalling/reinstalling the app works – make sure you set your minSdkVersion in your app/build.gradle to 18 or else it will fail on reinstall

For me the error also disappeared. Most probably because I cleaned everything and/or uninstalled and reinstalled the app. I don’t know what could cause that error. Fortunately it works properly now.

Please note that sometimes the installed plugin version is not in sync with the pubspec.yaml file. You can check the pub-cache (for me it is ~/.pub-cache/hosted/pub.dartlang.org) folder to check what version is installed.

In pubspec.yaml: flutter_secure_storage: ^3.3.1+1