I want to add Provider package in my flutter app, but has error like follow image:
flutter pub pub add provider
This link don't solve it
I solved it :)
The name of your project can not be equal to package name.
The name of my project is provider and that is compiler gave an error.
In your package's pubspec.yaml add this line like below. Then run pub get/pub upgrade:
dependencies:
provider: ^5.0.0
Note: Indentation must be considered. Not valid
dependencies:
provider: ^5.0.0
This error is caused due to versioning error.
In your pubspec.yaml file
dependencies:
provider:
Leave the version blank, it will automatically select the best one according to
the other packages.
After this run flutter pub get
I have a plugin created using the federated approach. The problem is that the generated_plugin_registrant.dart contains an incomplete import which is pointing to the app-facing package but leaves out the dart file name and this causes an error.
import 'package:my_plugin/'; // PROBLEMATIC LINE
import 'package:my_plugin_web/my_plugin_web.dart';
import 'package:flutter_web_plugins/flutter_web_plugins.dart';
// ignore: public_member_api_docs
void registerPlugins(Registrar registrar) {
.registerWith(registrar); // PROBLEMATIC LINE
MyPluginWeb.registerWith(registrar);
registrar.registerMessageHandler();
}
This code is in the default example app for a plugin with an unchanged default pubspec.yaml.
Here's the pubspec.yaml for the app-facing "my_plugin" package:
name: my_plugin
description: A new flutter plugin project.
version: 0.0.1
author:
homepage:
environment:
sdk: '>=2.12.0 <3.0.0'
flutter: '>=1.20.0'
dependencies:
flutter:
sdk: flutter
my_plugin_platform_interface:
path: ../my_plugin_platform_interface
my_plugin_web:
path: ../my_plugin_web
dev_dependencies:
flutter_test:
sdk: flutter
flutter:
plugin:
platforms:
android:
package: com.example.my_plugin
pluginClass: MyPlugin
ios:
pluginClass: MyPlugin
web:
defaultPackage:
path: my_plugin_web
I've tried all the usual commands like flutter clean and recreating the project but to no avail.
Under your web definition (which Google wants in a separate project you have to specify it as
web:
pluginClass: The class name of your web class here
fileName: The file name of the file that holds your web class here
I had it has just "file" and yours is "path" which will cause this.
The issue is that plugin support for the web was not generated for a specific package or packages.
Try creating an analysis_options.dart and add these lines
analyzer:
exclude: [lib/generated_plugin_registrant.dart]
then configure your vscode/.settings.json with these lines
"dart.analysisExcludedFolders":["./yourApp/lib/generated_plugin_registrant.dart" ]
Just find the answer, basically you need to use default_package to specify your are using the integrated plugin. More here
I created an example project inside a my flutter package and inside my example project i did:
dependencies:
flutter:
sdk: flutter
my_package:
path: ../
my_package used rxdart and i received an error after run my example project
Error: Could not resolve the package 'rxdart' in
'package:rxdart/rxdart.dart'.
I ran flutter packages get but the error is still here.
I just ran into the same issue. To solve it follow these steps:
Kill your app if it's running
Run flutter clean in both your main project directory and your my_package directory
Run flutter pub get in both your main project directory and your my_package directory
Now when you build your app you should be all set.
Check first, if you added rxdart package to your pubspec.yaml as shown below:
dependencies:
flutter:
sdk: flutter
rxdart: ^0.24.1
Run flutter pub get
I am new in Flutter. When I import the library: import 'package:intl/intl.dart'; , it says that the target of URI doesn't exist:package:intl/intl.dart;
When you import any package, example:
import 'package:intl/intl.dart';
You need to also add the package inside the pubspec.yaml file under the dependencies field example:
dependencies:
intl: ^0.15.7
Then from the terminal you can execute the following command:
flutter packages get
or
From Android Studio/IntelliJ:
Click Packages Get in the action ribbon at the top of pubspec.yaml
more info here:
https://flutter.io/using-packages/
Just to double check, you did import intl: ^0.15.7 into pubspec.yaml; triple check that it has four spaces in front of it (no more and no less); and you ran packages get?
Also, put your focus on the tab for main.dart and hit the green arrow to run it. Sometimes you will then see a popup bar at the top of the screen that tells you pubspec.yaml has changed and you need to run it again from that link in order for it to take. (I've seen that in IntelliJ)
Also, if it's showing red lines under publspec.yaml in the project window but everything is working, that's a bug in the analysis. Ignore it but yes, they do know about it and are working on it. It's often there because, for some reason, pubspec.yaml says your assets directory doesn't exist even though you can access the assets without any problem.
Let IDE do this for you :
flutter pub add intl
After running above command, It will resolve the dependency with the latest version available.
OR
Manual Process
1) Add package in pubspec.yaml file under dependencies field :
dependencies:
flutter:
sdk: flutter
cupertino_icons: ^1.0.2
intl: ^0.17.0 // Add this line
2) Execute the following command in terminal :
flutter packages get
3) Import package in your dart file :
import 'package:intl/intl.dart';
if you are facing errors while installing
it coming because of your old version of SDK.
Just fall back to the intl version back by some points in your pubs
intl: ^0.17.0 ---> intl: ^0.16.1 or any other older version like intl: ^0.15.1 etc.
Sometimes its the version of packages which after update not compatible with your old sdk
I'm learning to use Flutter using Android Studio. I'm going through step by step doc provided by Flutter. At Step:2 Use an external package I'm getting issue importing the english_words package. I have properly added the package in pubspec.yaml and clicked Packages Get which added the dependency but at the time of importing the package in lib/main.dart it is saying
Target of URI doesn't exist
'package:english_words/english_words.dart'.
I have seen many questions on StackOverflow but none of them helped me. Please help!
For some packages, once you do all the process described by the other answers to this question, you have to close the Android project and open it again. As well as the emulator.
Some packages need the restart, others do not need it.
After adding the package in the pubspec.yaml file, you need to execute the command flutter packages get or click on "Packages Get" in the action ribbon at the top of pubspec.yaml file.
Then the dependency and any transitive dependency will be added to the .packages file.
Check this:
https://flutter.io/using-packages/
Solution (For VSCode):
Run flutter packages get in pubspec.yml
Restart VSCode
I had the same issue and went about it like listed below and it worked.
1. Add the package
dependencies:
flutter:
sdk: flutter
# The following adds the Cupertino Icons font to your application.
# Use with the CupertinoIcons class for iOS style icons.
cupertino_icons: ^0.1.2
**english_words: ^3.1.5**
Save the pubspec.yaml file
go to your terminal and run 'flutter packages get'
4.Close your simulator and rebuild your cradle
Run the main.dart again and it should remove the error.
This is what worked for me, all the best.
Make sure that english_words is on the base-line with flutter:
Took me a lot of time, but in summary, just save the file pubspec.yaml will do. The command flutter pub get will be ran once u save it, then u can import the package.
There is no need to restart ur editor etc.
My solution was to add the "english_words: ^3.1.5" the version at the moment that I write this, under the "dependencies:" and before the "Flutter:" argument, without the "+" sign.
Hope that helps
I used this and it worked for me... without + sign and version in double quote ""..
english_words: "^3.1.5"
Make Sure that the alignment of english_words is correct inside your pubspec.yaml as it's "space sensitive" :
dependencies:
english_words: ^3.1.5 //two spaces
also never align it using tabs, I don't know why but it never works, and don't use + sign
There are so many methods to solve this issue, most of them will get solved on the second step,if not please try third method also it will work.
Run flutter packages get in pubsec.yaml file (if you are using VS Code it will be easier).
Restart your IDE.
Check it now, mostly it will work. If not try third step.
you have to repair pub caches
flutter packages pub cache repair
I hope it will work. if all methods are not working try to re install flutter.
my friend solution is so simple only add this code line in file pubspec.yaml
english_words: ^3.1.0
like this
dependencies:
# The following adds the Cupertino Icons font to your application.
# Use with the CupertinoIcons class for iOS style icons.
cupertino_icons: ^0.1.2
english_words: ^3.1.0
dev_dependencies:
flutter_test:
sdk: flutter
it would work perfectly:)
I faced the same issue but I managed to solve it using the steps below:
add the package as an example english_words: ^3.1.0" in 'pubspec.yaml file.
save file or press ctrl+s
//the Output Console will appear this message
[app name] flutter packages get.
Running "flutter pub get" in first_app..., 2.4s
exit code 0.).
3. check main.dart file, the error will be removed.
For me nothing worked. Things resolved only after
Flutter upgrade
in pubsec.yaml file
For those who are still experiencing this problem, it took me hours to figure out what was wrong. Basically, if all the other answers don't work:
Open the test/.packages file on whatever IDE you are using
Locate the package that is not working and go to that directory on your computer.
Delete the whole package. In my case it was the whole english_words package folder.
In the pubspec.lock and .packages file, delete all instances of that package.
run pub get
In the docs of https://flutter.dev/docs/get-started/codelab there is the following code:
dependencies:
flutter:
sdk: flutter
cupertino_icons: ^0.1.3
+ english_words: ^3.1.5
The thing which is causing the error is "+ sign". I just removed it and all worked fine for me.
Delete the plus sign "+" in front of english_words (if you have one)
dependencies:
flutter:
sdk: flutter
cupertino_icons: ^1.0.2
english_words: ^3.1.5
I got the same issue.
It is observed only in version 4.0.0 .For lower versions there is no problem.
So here is what you can do to solve this:
Download code for the dependency from :
https://github.com/filiph/english_words
Unzip it Rename it to
english_words-4.0.0
Copy this folder.
Now go to flutter's SDK folder and navigate to
.pub-cache\hosted\pub.dartlang.org
and paste the folder english_words-4.0.0 here. Add dependency in pubspec.yaml file. Now run flutter pub get command.
You are good to go.
Note : How to find the path of Flutter SDK
All you need to do is to restart IDE(Android studio or VSCode)
Having this error message:
Error: Cannot run with sound null safety, because the following
dependencies don't support null safety:
package:english_words
I had to change this dependency english_words: ^3.1.5 to the latest version english_words: ^4.0.0 and make "pub get":
dependencies:
flutter:
sdk: flutter
cupertino_icons: ^1.0.2
english_words: ^4.0.0
provider: ^6.0.0
in your pubspec.yaml file, instead of:
english_words: ^4.0.0
try:
english_words: '4.0.0'
it worked for me