Flutter-permission-handler: Unhandled Exception: MissingPluginException(No implementation found for method requestPermissions on channel flutter.baseflow.com/permissions/methods)

[RizanPSTU]

🐛 Bug Report

E/flutter (16782): [ERROR:flutter/lib/ui/ui_dart_state.cc(157)] Unhandled Exception: MissingPluginException(No implementation found for method requestPermissions on channel flutter.baseflow.com/permissions/methods)

When I try to run

Future _handleCameraAndMicPermission() async {
// You can request multiple permissions at once.
Map statuses = await [
Permission.camera,
Permission.microphone,
].request();
print(statuses[Permission.camera]);
}

Expected behavior

There should be popup for camera and microphone permission

Configuration

Using permission_handler: ^5.0.0+hotfix.8
AndroidX enabled
android.useAndroidX=true
android.enableJetifier=true

Platform:

• [ ] :iphone: iOS
• [x ] :robot: Android

[RizanPSTU]

Used

flutter clean
flutter run

Still the same error

[RizanPSTU]

When I run this

I also get the same error

https://github.com/Meherdeep/agora-flutter-broadcast

[TMSantos]

Also having this, Android only.
Tried:

• brand new android project (start new project and copy android folder to my existing)
• flutter clean
• full clean (delete all cache folders etc)

Same issue.

But if I started brand new project, it works

[mvanbeusekom]

@TMSantos, @RizanPSTU, have you updated your App to support AndroidX (see also #87)?

@TMSantos looks like you undid AndroidX when you copied back the Android folder into the newly created project.

Please let me know?

[TMSantos]

hey @mvanbeusekom thanks for replying.
I believe I'm not entirely sure what "converting to androidX" means?

My gradle.properties has indication to use it:

org.gradle.jvmargs=-Xmx1536M
android.enableR8=true
android.useAndroidX=true
android.enableJetifier=true

But if I try to convert it using Intellij I get this error:

I think the project is already AndroidX, I don't see any indication to not be, also no differences between your example, or brand new flutter project (which works).

[TMSantos]

I fixed it finally, @RizanPSTU my problem was simply because MainActivity was missing:
GeneratedPluginRegistrant.registerWith(flutterEngine)

I overrided this method in MainActivity:
configureFlutterEngine

It seems that if you override it, you need to explicitly call this method, not sure if it's your case, but adding this line fixed the problem with permission_handler package.

Other things you can try:

• Migrate to androidX using android Studio
• delete gradle caches
• Good post about this topic: https://stackoverflow.com/questions/50985468/flutter-missingpluginexception-with-several-plugins

Hope you can fix it, this issue is not related to permission_handler project, but to flutter engine.

have a good day

[RizanPSTU]

Problem solved :) You are great :)

[ricrsantos]

Hi Folks!
I tried a lot of things and any thing working. After long time I discovered the root problem. In my case the problema was conflict between two plugins, Facebook signIn and Permissions. So I cut office the Facebook Plugin and all works!

[r-silver1]

hey, this fixed it for me... it was a simple issue of not stopping and restarting the application fully after changing gradle settings in my code https://stackoverflow.com/a/54940371/10432596

[ZaifSenpai]

Hi Folks!
I tried a lot of things and any thing working. After long time I discovered the root problem. In my case the problema was conflict between two plugins, Facebook signIn and Permissions. So I cut office the Facebook Plugin and all works!

Thank you for pointing out the issue. Yes the problem is with flutter_facebook_auth package. My app is having problem with both google_fonts and permission_handler packages due to this Facebook package.

I need all of these packages in my app. How can we "isolate" the facebook login package so it does not effect the other packages?

The packages versions I am using:
permission_handler: ^5.0.1+1
google_fonts: ^1.1.2

Edit:
Having same problem with flutter_login_facebook

[aniketsongara]

Hi Folks!
I tried a lot of things and any thing working. After long time I discovered the root problem. In my case the problema was conflict between two plugins, Facebook signIn and Permissions. So I cut office the Facebook Plugin and all works!

In my case problem is occurring due to uses of permission_handler and file_picker plugin in same project.

[aniketsongara]

Hi Folks!
I tried a lot of things and any thing working. After long time I discovered the root problem. In my case the problema was conflict between two plugins, Facebook signIn and Permissions. So I cut office the Facebook Plugin and all works!

Thank you for pointing out the issue. Yes the problem is with flutter_facebook_auth package. My app is having problem with both google_fonts and permission_handler packages due to this Facebook package.

I need all of these packages in my app. How can we "isolate" the facebook login package so it does not effect the other packages?

The packages versions I am using:
permission_handler: ^5.0.1+1
google_fonts: ^1.1.2

Edit:
Having same problem with flutter_login_facebook

Did you get any solution of it ?
With same issue I am struggling, I need to have both packages in the app is permission_handler & file_picker

[ZaifSenpai]

Hi Folks!
I tried a lot of things and any thing working. After long time I discovered the root problem. In my case the problema was conflict between two plugins, Facebook signIn and Permissions. So I cut office the Facebook Plugin and all works!

Thank you for pointing out the issue. Yes the problem is with flutter_facebook_auth package. My app is having problem with both google_fonts and permission_handler packages due to this Facebook package.
I need all of these packages in my app. How can we "isolate" the facebook login package so it does not effect the other packages?
The packages versions I am using:
permission_handler: ^5.0.1+1
google_fonts: ^1.1.2
Edit:
Having same problem with flutter_login_facebook

Did you get any solution of it ?
With same issue I am struggling, I need to have both packages in the app is permission_handler & file_picker

I have not tried this solution yet, but the developer of flutter-facebook-auth posted this in their:
darwin-morocho comment on Issue #48

[aniketsongara]

Hi Folks!
I tried a lot of things and any thing working. After long time I discovered the root problem. In my case the problema was conflict between two plugins, Facebook signIn and Permissions. So I cut office the Facebook Plugin and all works!

Thank you for pointing out the issue. Yes the problem is with flutter_facebook_auth package. My app is having problem with both google_fonts and permission_handler packages due to this Facebook package.
I need all of these packages in my app. How can we "isolate" the facebook login package so it does not effect the other packages?
The packages versions I am using:
permission_handler: ^5.0.1+1
google_fonts: ^1.1.2
Edit:
Having same problem with flutter_login_facebook

Did you get any solution of it ?
With same issue I am struggling, I need to have both packages in the app is permission_handler & file_picker

I have not tried this solution yet, but the developer of flutter-facebook-auth posted this in their:
darwin-morocho comment on Issue #48

Thank you for your response but it is not useful in my case I am getting same darwin-morocho comment on Issue #48
in the app release mode with
pubspec.yaml

dependencies:
  flutter:
    sdk: flutter
  cupertino_icons: ^1.0.0
  file_picker: ^2.1.6
  permission_handler: ^5.1.0+2

[aniketsongara]

Issues resolved by adding this

buildTypes {
release {
shrinkResources false
minifyEnabled false
signingConfig signingConfigs.release
}
}

in android/app/build.gradle

[Sheharyar566]

Any progress on this? My issue relates to permission_handler and image_picker plugin

[eademir]

I have similar situation. I am using agora video call in my app and I need microphone and camera permissions. it's working on iOS but not working on Android.

[ERROR:flutter/lib/ui/ui_dart_state.cc(186)] Unhandled Exception: MissingPluginException(No implementation found for method requestPermissions on channel flutter.baseflow.com/permissions/methods)

[Sheharyar566]

@eademir which plugins you are using? In my case, image_picker and permission_handler were in sort of a clash, so I replaced the image_picker with images_picker plugin (an entirely different plugin) and now it's working.

[eademir]

Thank you for reply @Sheharyar566. Unfortunately, agora is must for my project and there is no any substitution for agora. By the way, I updated agora_rtc_engine to 3.1.3 and permission_handler to 5.0.1 and I am still getting same error. I will ask to agora help desk.

Edit: Hi everybody! I solved the problem. I edited my pubspec.yaml file and changed flutter_facebook_auth: ^1.0.0 to flutter_facebook_auth_platform_interface: ^2.4.0. It wasn't only about agora or permission handler. Thanks for inspire me @Sheharyar566!

[moninm]

Hi, if this can help, I solved that issue by adding in "MainActivity.kt" for Kotlin :

override fun onCreate(savedInstanceState: Bundle?, persistentState: PersistableBundle?) {
super.onCreate(savedInstanceState, persistentState)
GeneratedPluginRegistrant.registerWith(FlutterEngine(this))
}
override fun configureFlutterEngine(flutterEngine: FlutterEngine) {
super.configureFlutterEngine(flutterEngine)
flutterEngine.plugins.add(PathProviderPlugin())
flutterEngine.plugins.add(SqflitePlugin())
flutterEngine.plugins.add(PermissionHandlerPlugin())
}