141

I am trying to use the plugin 

_launchURL(url) async {
  await launch("www.google.com");
}

I have put "www.google.com" just for debugging purposes.

The error I get is MissingPluginException :

E/flutter ( 8299): MissingPluginException(No implementation found for method launch on channel plugins.flutter.io/url_launcher)
E/flutter ( 8299): #0      MethodChannel.invokeMethod (package:flutter/src/services/platform_channel.dart:278:7)
E/flutter ( 8299): <asynchronous suspension>
E/flutter ( 8299): #1      launch (package:url_launcher/url_launcher.dart:47:19)
E/flutter ( 8299): #2      _launchURL (file:///Users/matejsimunic/Work/dart/suhail/lib/main.dart:834:9)
E/flutter ( 8299): <asynchronous suspension>
E/flutter ( 8299): #3      _TripDetailBodyState.build.<anonymous closure> (file:///Users/matejsimunic/Work/dart/suhail/lib/main.dart:818:19)
E/flutter ( 8299): #4      _InkResponseState._handleTap (package:flutter/src/material/ink_well.dart:494:14)
E/flutter ( 8299): #5      _InkResponseState.build.<anonymous closure> (package:flutter/src/material/ink_well.dart:549:30)
E/flutter ( 8299): #6      GestureRecognizer.invokeCallback (package:flutter/src/gestures/recognizer.dart:102:24)
E/flutter ( 8299): #7      TapGestureRecognizer._checkUp (package:flutter/src/gestures/tap.dart:161:9)
E/flutter ( 8299): #8      TapGestureRecognizer.handlePrimaryPointer (package:flutter/src/gestures/tap.dart:94:7)
E/flutter ( 8299): #9      PrimaryPointerGestureRecognizer.handleEvent (package:flutter/src/gestures/recognizer.dart:315:9)
E/flutter ( 8299): #10     PointerRouter._dispatch (package:flutter/src/gestures/pointer_router.dart:73:12)
E/flutter ( 8299): #11     PointerRouter.route (package:flutter/src/gestures/pointer_router.dart:101:11)
E/flutter ( 8299): #12     _WidgetsFlutterBinding&BindingBase&GestureBinding.handleEvent (package:flutter/src/gestures/binding.dart:143:19)
E/flutter ( 8299): #13     _WidgetsFlutterBinding&BindingBase&GestureBinding.dispatchEvent (package:flutter/src/gestures/binding.dart:121:22)
E/flutter ( 8299): #14     _WidgetsFlutterBinding&BindingBase&GestureBinding._handlePointerEvent (package:flutter/src/gestures/binding.dart:101:7)
E/flutter ( 8299): #15     _WidgetsFlutterBinding&BindingBase&GestureBinding._flushPointerEventQueue (package:flutter/src/gestures/binding.dart:64:7)
E/flutter ( 8299): #16     _WidgetsFlutterBinding&BindingBase&GestureBinding._handlePointerDataPacket (package:flutter/src/gestures/binding.dart:48:7)
E/flutter ( 8299): #17     _invoke1 (dart:ui/hooks.dart:134:13)
E/flutter ( 8299): #18     _dispatchPointerDataPacket (dart:ui/hooks.dart:91:5)

restarting the app from ide doesn't work.

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1
  • I had that problem when using image_picker: ^0.6.7+4 with flutter_facebook_login: ^3.0.0 I had to remove Facebook support from my app Commented Aug 3, 2020 at 22:12

12 Answers 12

Reset to default
329

If you are using hot restart or hot reload, it won't do the trick. Since Flutter has to inject plugin dependencies into the platform-specific parts of your app, hot restart/hot reload is not enough to trigger the injection. Check this issue for more.

Close the app and execute flutter run command.

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3 Comments

Its better to clean the run one before using the command 'flutter run'. To clean use the command 'flutter clean'
No need to do anything, just close the app and re-run/re-compile. It worked for me. Thanks to ask.
@Kamlesh That's exactly what is mentioned in the last line of the solution. The first paragraph is just to explain why the exception might be occurring.
50 
flutter clean

Inside the console did the job as stated here

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1 Comment

So simple -- and yet this has saved me hours of hair-pulling. Great tip.
25

I faced this Error when using Url_launcher package. just had to stop and run the app, issue got solved

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1 Comment

Yes, because the URL needs to be set up in native settings. so it will be done after rerunning the flutter project.
14

Simply Run these commands..

either--

Flutter clean

or

Invalidate Caches/Restart

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Comments

11

just open terminal and

Step1
Delete all the temporary file generated during the build process this is by removing the build/ directory by running this command
flutter clean

Step 2
After deleting your build/ directory run this command to fetch and download dependencies indicated in your pubspec.yaml file
flutter pub get

Step 3 This command builds and runs your application to a connected device or environment of choice, is to validate if everything is working as expected.
flutter run

Its worked for me, Thanks have a good day .

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1 Comment

Your answer could be improved with additional supporting information. Please edit to add further details, such as citations or documentation, so that others can confirm that your answer is correct. You can find more information on how to write good answers in the help center.
8

Had problem while using flutter toast dependency and dependencies like facebook_login. I followed these steps and resolved it:

  1. First, u need to test whether these toast and shared preference dependencies are causing problems or some other dependencies cause the problem.
  2. For testing that, u need to create a new seprate flutter project having the same flutter toast and shared preference dependency and check now if u r able to get toasts or not.
  3. If u r getting toast so there is no problem with ur toast dependency.
  4. The problem might be in ur one of the social media dependency.

In my case, I followed the above steps and found that problem was in facebook dependency. Finally, I found that I did not provide details of my app at facebook developer console. So implemented that and my app was fine.

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1 Comment

Thanks brother, you saved me, I was also struggling with same problem facebook dependency, I was amazed why the plugins are not working while they are working on the other app correctly, great!!!!
3

In my case it was for the cached_network_image plugin , I have removed cached_network_image from pubspec.yaml and replaced the implementation with Image.network and the problem has disappeared

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3

In my case, I had this problem with the image picker, then I followed the documentation and used an emulator with api 29+, it didn't work before because I was using an emulator with api 28 https://pub.dev/packages/image_picker

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2

Uninstalling and installing the app works for me

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1

i think if you have already done flutter pub get on the dependency, and added all the requirements for the given platform you just have to flutter run your app

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0

Check out the URL LAUNCHER Package and some configurations for android and IOS. It will solve your issues.

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0

These 3 steps solved it all when I encountered this issue when using syncfusion_flutter_pdfviewer package

  1. flutter clean
  2. flutter pub get
  3. flutter run
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