the doc reference android studio, but I'm using Visual Studio Code, so how do I do this?
"While viewing the pubspec in Android Studio’s editor view, click Packages get upper right."
in pubspec.yaml I added "english_words: ^3.1.0", and I ran 'flutter packages get' from the command palette but it's not working.
make sure you are saving the file before running flutter packages get
I was having error on mine too. This was my initial code
dependencies:
flutter:
sdk: flutter
http: ^0.12.2
and I got this error
"Error on line 25, column 5 of pubspec.yaml: A dependency may only have one source."
so I adjusted my indentation like so
dependencies:
flutter:
sdk: flutter
http: ^0.12.2
And it worked just fined
HOW TO ADD EXTERNAL PACKAGE TO DART AND FLUTTER WITH VISUAL STUDIO CODE
The final solution to this problem is here
you will get the latest version of whatever package you are looking for
Forget going to the pub.dev to search for your packages and copy the dependency
text.
THE SOLUTION IS:
Install the "pubspec assist" by Jeroen Meijer in the extension menu.
Open the pubspec.yaml file in the vs code.
Simply open the Command Palette (by default, Ctrl+Shift+P on Windows, ⌘+Shift+P
on Mac) and search for "Pubspec Assist" and press ENTER.
Then search for the required package with their names. It will automatically add
the dependencies to the pubspec.yaml file. After that save the file using
Ctrl+S.
Get ready to import the package in the main file.
Related
I started fluttering a few days ago. I want to add "font awesome" to my project, but I can't. I searched but could not find the right answer. I finally got this guide, but it doesn't work either.
Adding a package dependency to an app
To add the package, css_colors, to an app:
Depend on it
Open the pubspec.yaml file located inside the app folder, and add css_colors: under dependencies.
Install it
From the terminal: Run flutter pub get.
OR
From Android Studio/IntelliJ: Click Packages get in the action ribbon at the top of pubspec.yaml.
Import it
Add a corresponding import statement in the Dart code.
4. Stop and restart the app, if necessary
If the package brings platform-specific code (Kotlin/Java for Android, Swift/Objective-C for iOS), that code must be built into your app. Hot reload and hot restart only update the Dart code, so a full restart of the app might be required to avoid errors like MissingPluginException when using the package.
In the dependencies: section of your pubspec.yaml, add the following line:
dependencies:
font_awesome_flutter:
Look here https://pub.dev/packages/font_awesome_flutter/install
It contain examples and instructions.
Steps also the same:
add the package name to dependencies section. It very important to keep the correct number of spaces in every line of pubspec.yaml, it has very sensitive format
in your case:
dependencies:
font_awesome_flutter: ^8.10.0
Click "Packeges get" in top right corner
Import the package into your dart code
in your case:
import 'package:font_awesome_flutter/font_awesome_flutter.dart';
Now your can use it in Icon widget
Icon(
FontAwesomeIcons.mars,
size:80.0)
I'm currently developing flutter application with VSCode and want to add some packages. ex) dropdown_menu
I did flutter pub get / flutter packages get / clicking down arrow button in vscode(get Packages)
and this is all I get everytime
PS D:\VSCodeProjects\testt> flutter pub get
Running "flutter pub get" in testt... 0.4s
PS D:\VSCodeProjects\testt>
this is my code in pubspec.
dependencies:
flutter:
sdk: flutter
cupertino_icons: ^0.1.3
dropdown_menu: ^1.1.0
I did turn on / off program( and computer) , restart,
and
flutter clean
flutter packages get
flutter packages upgrade
Does anybody know how to solve??
It's running, by default in vs code whenever you save your .yaml file it runs it under the hood. When you explicitly run it using the command, it takes very less time as the packages are already up to date.
If in doubt, try to use the new packages that you added and they should not give errors.
flutter pub get is meant to be quick especially when you don't have much libraries.
What you see is right there should not be any problem.
But if there is issues where you are going for a specific version and it is not working, this is because pubspec.yaml stores the settings of what version of library but pubspec.lock stores the actual version your app is using.
Judging from your comments of it not showing up. It might be related to this #31115
try the solution and see if it works.
Select the View > Command Palette menubar option
Type "flutter"
Click "flutter get packages"
you can use this in vscode
Pubspec Assist
After typing the package don't forget to save the yaml file or click ctrl + s.
I'm slowly building my personal website over at dlblack.dev, and I'm trying to spice it up a little bit. For example, from a computer (rather than a tablet or phone since they don't have mouse pointers), if you hover over any of the clickable items, it doesn't change your mouse pointer to indicate it's clickable, and the clickable object doesn't change at all. I've decided to follow this FilledStacks tutorial, but it doesn't mention anything about fixing this problem.
Essentially what's happening is when I get ~2.5 mins through the tutorial video (where he writes the skeleton extension class) and try to duplicate it, VS Code redlines almost the entire class declaration aside from the name. What I'm writing is the exact same thing as what he has on screen at 2:26, and here's my code:
import 'package:flutter/material.dart';
import 'dart:html' as html;
extension HoverExtension on Widget{
}
"extension", "on", and "Widget" are all redlined when I do this. When I hover over "extension", it says the following:
Undefined class 'extension'.
Try changing the name to the name of an existing class, or creating a class with the name 'extension'. dartundefined_class
This requires the 'extension-methods' language feature to be enabled.
Try updating your pubspec.yaml to set the minimum SDK constraint to 2.6 or higher, and running 'pub get'. dart(experiment_not_enabled)
The first thing I did was change my minimum SDK constraint to 2.6.0 in my pubspec.yaml file. I then changed it to 2.7.0 because a lot of people online say extensions were released in Dart 2.7. I've done a lot of Googling on the subject but no one seems to have the same problem as me: I have no analysis_options.yaml file. I created one, and put only this in its contents:
include:
analyzer:
enable-experiment:
- extension-methods
linter:
In theory, I believe that should fix my problem once I run flutter pub get from the command line in my root folder; it doesn't. I have no idea what's wrong. Any suggestions?
In Android Studio solving this problem requires three steps:
Update SDK version in pubspec.yaml (must be 2.6.0 or higher)
environment:
sdk: ">=2.7.0 <3.0.0"
Tools -> Flutter -> Flutter Clean
Close project and reopen it (eg. File -> Close project)
For the changes in pubspec.yaml and analysis_options.yaml to take place, you have to restart the Dart Analysis Server. In VSCode, that's as simple as Ctrl+Shift+P -> Reload Window.
I had to do flutter clean, then close and re-open VSCode.
I had a similar problem with the "extensions" feature in Dart (on Windows) ... I was getting "undefined class", and the message saying that I needed to use the "experimental" Dart settings. It seems that I had two Dart installations, one in "c:\Program Files" and one in "c:\tools\dart-sdk". I removed the version under "Program Files". I also ran "choco uninstall dart-sdk" and "choco install dart-sdk", and made sure that the version was correct (using "dart --version") after the install. The command "where dart" should display "c:\tools\dart-sdk-bin-dart.exe" after the choco install. When I went back into my Flutter project (using Android Studio) it said that I didn't have Dart support for my project, and I just had to enter the Dart SDK location.
if tombroz's solution won't work then
1.Tools -> Flutter -> Flutter Clean
2.Tools -> Flutter ->Pub get
3.File -> Invalidate cache/Restart -> Invalidate cache and Restart
I just had to run flutter clean et voila.
I'm unable to get the required package English_words.
under dependencies I added English_words: ^3.1.5
screenshot of "pubspec.yaml" file with execution:
Edit: Issue resolved, importing package worked fine. The full code is also given in the flutter docs.
I suspect you are following the tutorial at https://flutter.io/docs/get-started/codelab#step-2-use-an-external-package ... the "+" in front of english_words there is an indicator of a diff. You should add that line, but leave off the +.
I found error in pubspec.yaml file as shown in your screenshot. You need to add english_words: ^3.1.5 to dev_dependencies rather than in dependencies. Actual code snippet will be:
dev_dependencies:
flutter_test:
sdk: flutter
english_words: ^3.1.5
Then click on Package get (shown in Android Studio) option to add above dependency for the project. You can also do the same using command(in project stucture):
flutter packages get
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