安装flutter_launcher_icons的问题

Question

I added the flutter package "flutter_launcher_icons" but get problems when try to use it.

My "pubspec.yaml":

environment:
  sdk: ">=2.13.0 <3.0.0"

dependencies:
  flutter:
    sdk: flutter
  flutter_blue: ^0.8.0
  csv: ^5.0.0
  share: ^2.0.4
  path_provider: ^2.0.2
  flutter_launcher_icons: ^0.9.0
  cupertino_icons: ^1.0.2


dev_dependencies:
  flutter_test:
    sdk: flutter

flutter_icons:
  android: "launcher_icon"
  ios: true
  image_path: "assets/icon/Logo.png" 
  adaptive_icon_background: "assets/launcher/background.png"
  adaptive_icon_foreground: "assets/launcher/foreground.png"

When I run "pub get" I get this (looks OK):

C:\src\flutter\bin\flutter.bat --no-color pub get
Running "flutter pub get" in ble_thms...                           790ms
Process finished with exit code 0

But when I try to run the "flutter_launcher_icons" I get this:

C:\src\flutter\packages\flutter_tools>flutter pub run flutter_launcher_icons:main
Could not find package "flutter_launcher_icons". Did you forget to add a dependency?
pub finished with exit code 65

When I try to install "flutter_launcher_icons via terminal its the same:

C:\src\flutter\packages\flutter_tools>flutter pub get flutter_launcher_icons
Running "flutter pub get" in ....                                  894ms

C:\src\flutter\packages\flutter_tools>flutter pub run flutter_launcher_icons:main
Could not find package "flutter_launcher_icons". Did you forget to add a dependency?
pub finished with exit code 65

How can I solve this problem to use the package "flutter_launcerh_icons"? I also already tried "pub upgrade" and "pub outdated".

Answer 1

You should be try to use below dependency:

flutter_launcher_icons: ^0.8.0

Below is your pubspec.yaml file:

dev_dependencies: 
  flutter_test:
    sdk: flutter

  flutter_launcher_icons: "^0.8.0"

flutter_icons:
  image_path: "assets/icon/Logo.png" 
  android: true
  ios: true

1. Prepare an app icon for the specified path. eg icon/icon.png

2. Execute command on the terminal to Create app icons:

    flutter pub get flutter pub run flutter_launcher_icons:main

Answer 2

OK, it seems that there is a problem with the flutter_tools and the dependence on "image"

C:\src\flutter\packages\flutter_tools>flutter pub add flutter_launcher_icons
The current Dart SDK version is 2.13.4.

Because flutter_launcher_icons <0.4.0 requires SDK version >=1.20.1 <2.0.0 and flutter_launcher_icons >=0.4.0 <0.7.1 depends on image ^2.0.0, flutter_launcher_icons <0.7.1 requires image ^2.0.0.
And because flutter_launcher_icons >=0.7.1 <0.9.0 depends on yaml ^2.1.15 and flutter_launcher_icons >=0.9.0 depends on args 2.0.0, every version of flutter_launcher_icons requires args 2.0.0 or image ^2.0.0 or yaml ^2.1.15.
And because flutter_tools depends on both args 2.1.0 and yaml 3.1.0, every version of flutter_launcher_icons requires image ^2.0.0.
So, because flutter_tools depends on both image ^3.0.2 and flutter_launcher_icons any, version solving failed.

Can I "downgrade" somehow the "flutter_tools" ?

Answer 3

The dependency is dev dependency, so it must go under dev_dependencies list.

dev_dependencies:
  flutter_launcher_icons: "^0.9.0"

flutter_icons:
  android: "launcher_icon"
  ios: true
  image_path: "assets/icon/icon.png"

Dev dependency are not necessarily ran on "flutter run", but rather with specific command, like:

flutter pub run flutter_launcher_icons:main -f "pubspec.yaml'

Please refer to installation guide on pub.dev

Answer 4

Found the problem:

I somehow changed the path in the Android Studio Console to "C:\\src\\flutter\\packages\\flutter_tools". So I changed it back to the project path "C:\\src\\Android\\AndroidStudioProjects\\my_flutter_project".

Now it is working.

Clumsy mistake from my side. :-(

Answer 5

我遇到了同样的错误，我发现我在命令行中使用了 laucher 而不是启动器

Answer 6

注意分号和主之间的空间，即 (flutter pub run flutter_launcher_icons: main) 不起作用，但 flutter pub run flutter_launcher_icons:main 有效，只是我认为你应该知道的一个提示

Answer 7

听听我是如何解决我的问题的，在你的代码编辑器终端输入以下命令 flutter pub add package_name 或输入： flutter pub upgrade package_name 如果它已经存在希望它会解决问题

Answer 8

Flutter said that I "Could not find package " flutter_launcher_icons<\/strong> ". Did you forget to add a dependency?"

Answer 9

I just solved the same error you have, and it was something so simple that many of us do not realize it sometimes.

• Verify that the terminal is in your project folder.
• Try putting flutter_launcher_icons: any in the dev_dependencies: section like in the image.
• Verify correct indentation in pubspec.yaml

click to see image