I want to create a custom library and use it in Flutter project.
I created a custom library in project:
But I can't get pub it. (Error)
Because write_library_external depends on lib_math from path which doesn't exist (could not find package lib_math at "..\lib_math"), version solving failed.
pub get failed (66; Because write_library_external depends on lib_math from path which doesn't exist (could not find package lib_math at "..\lib_math"), version solving failed.)
This is my pubspec.yaml
version: 1.0.0+1
environment:
sdk: ">=2.1.0 <3.0.0"
dependencies:
flutter:
sdk: flutter
lib_math:
path: /lib_math
# The following adds the Cupertino Icons font to your application.
# Use with the CupertinoIcons class for iOS style icons.
cupertino_icons: ^0.1.2
dev_dependencies:
flutter_test:
sdk: flutter
Please help me! Thanks!
It looks like you added the wrong library path.
With your project, you should try changing the file at pubspec.yaml:
dependencies:
lib_math:
path: ../write_library_external/library/lib_math
I'm trying to install rxdart by copying it from https://pub.dev/packages/rxdart/versions/0.7.1#-installing-tab- , but its showing some error.
The current Dart SDK version is 2.3.0-dev.0.5.flutter-a1668566e5.
Because flutter_course depends on rxdart >=0.1.0+1 <0.16.0 which requires SDK version >1.12.0 <2.0.0, version solving failed.
pub get failed (1)
exit code 1
I tried using flutter upgrade.
But that doesn't change anything.
My pubsec.yaml file
version: 1.0.0+1
environment:
sdk: ">=2.1.0 <3.0.0"
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
scoped_model: ^1.0.1
http: ^0.12.0+2
shared_preferences: ^0.5.3+1
rxdart: ^0.7.1
dev_dependencies:
flutter_test:
sdk: flutter
I'm building a Flutter app, and just added the mime and http_parser packages. After that I got the following error when building:
<appname>\build\app\intermediates\merged_manifests\debug\AndroidManifest.xml:35: AAPT: error: resource integer/google_play_services_version (aka com.att.fluttercount:integer/google_play_services_version) not found.
Up until now, the app had built just fine. I backed out my changes, including removing the packages from pubspec.yaml, but the error won't go away.
Here's the relevant part of my pubspec.yaml:
environment:
sdk: ">=2.1.0 <3.0.0"
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
flutter_map: ^0.5.0+1
scoped_model: ^1.0.1
rxdart: ^0.21.0
flutter_masked_text: ^0.8.0
image_picker: ^0.5.0+9
webview_flutter: ^0.3.6
sqflite: ^1.1.5
http: ^0.12.0+2
#mime: ^0.9.6+2
#http_parser: ^3.1.3
# Must use 'any' as the version of path_provider, because other packages depend on
# earlier versions of path_provider.
path_provider: any
# Note: Must use 'any' as the version of uuid, because some dependencies of flutter_map
# depend on earlier versions of uuid.
uuid: any
dev_dependencies:
flutter_test:
sdk: flutter
Does anyone have any suggestions on how to fix this errror?
I had neglected to mention that I had also removed a dependency on google_maps_flutter, which I was no longer using. I added this dependency back in, and the error went away.
version solving failed. Error: Unable to 'pub upgrade' flutter tool.
After I forked examples from the Github. I tried to run command "get packages" on VScode. The pub upgrade --force and "flutter doctor" seems not to work anymore. I need help.
pubspec.yaml
version: 1.0.0+1
environment:
sdk: ">=2.1.0 <3.0.0"
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
rxdart: ^0.18.0
cloud_firestore: ^0.8.2
http: ^0.12.0+1
dev_dependencies:
flutter_test:
sdk: flutter
I can't seem to run flutter command anymore.
I solved the problem by reinstalling the flutter and set the path.
I keep getting
Running "flutter packages get" in flutter_sportters...
Error on line 6, column 5 of pubspec.yaml: A dependency may only have one source.
sdk: flutter
^^^^^^^^^^^^^
When I run my app or Packages Get.
It worked perfectly fine before. Have no idea how to fix this.
Consider you are going to use this package "shared_preferences".
You will get this error in pubspec.yaml. If you did like below.
dependencies:
flutter:
sdk: flutter
shared_preferences: v0.4.2
Indention is important you are accidentally adding shared_preference package below flutter dependency. So the error "A dependency may only have one source"
Correct format below:
dependencies:
flutter:
sdk: flutter
shared_preferences: v0.4.2 #no indention
It throws an error because of Indention. It is important to maintain Indention while adding a dependency in flutter.
Before :
dependencies:
flutter:
sdk: flutter
cupertino_icons: ^0.1.2
english_words: ^3.1.0
After :
dependencies:
flutter:
sdk: flutter
cupertino_icons: ^0.1.2
english_words: ^3.1.0
Hope this will solve your error.
Happy coding!!!
Indentation !!!
Being newbees making silly mistakes. I have written the new dependency inside the flutter root as :
dependencies:
flutter:
sdk: flutter
sqflite:
Instead of
dependencies:
flutter:
sdk: flutter
sqflite:
Comment when you see the difference!!
I was trying to add assets folder to my project. I added it under dependencies which caused the error:
dependencies:
flutter:
sdk: flutter
assets:
- images/
It's not to be added under dependencies. Instead, add it under flutter:
flutter:
uses-material-design: true
assets:
- images/
You can define just like that in pubspec.yaml file
dependencies:
flutter:
sdk: flutter
image_picker: 0.4.1
and flutter packages get you can call via terminal or if you are using Android Studio than options availbale above when you edit pubspec.yaml file.
In terminal go to your project directory and then enter flutter packages get
I solve My problem:
Here my first Code
dependencies
flutter:
sdk: flutter
webfeed: ^0.4.2
# The following adds the Cupertino Icons font to your application.
# Use with the CupertinoIcons class for iOS style icons.
cupertino_icons: ^0.1.2
after I change it
dependencies:
flutter:
sdk: flutter
webfeed: ^0.4.2
# The following adds the Cupertino Icons font to your application.
# Use with the CupertinoIcons class for iOS style icons.
cupertino_icons: ^0.1.2
I thing you must to put your package name in the same number colunm of flutter: and cupertino_icons:
Check indentations as flutter package in pubspec.yaml takes single dependency source.
make sure, the name of your project is not same as any package ,
this too cause for this error
open your pubspec.yaml file
dependencies:
flutter:
sdk: flutter
cupertino_icons: ^0.1.2
country_code_picker: ^1.0.4
Other answers are correct. I would also like to add that I was trying to add shared_preferences and even though my indentation was correct, I was still getting the error mentioned in the question. To resolve it I changed the name of my project as it was also shared preferences
I kept getting this error no matter what I did, including commenting out the new lines. Finally, I put them back in with the correct indentation and ran the program. The problem magically resolved itself. However, the indentation is critical.
I am getting this error due to duplication of a package in dependencies
i.e:
dependencies:
flutter:
sdk: flutter
**cupertino_icons: ^0.1.2**
english_words: ^3.1.5
# The following adds the Cupertino Icons font to your application.
# Use with the CupertinoIcons class for iOS style icons.
cupertino_icons: ^0.1.2
I solved this error by removing duplication then Flutter clean and then Flutter Packages Get.
Its due to indentation: check out correct way
name: flutter_app
description: A new Flutter application.
environment:
sdk: ">=2.1.0 <3.0.0"
dependencies:
flutter:
sdk: flutter
http: "0.11.3+17"
autocomplete_textfield: ^1.6.4
dev_dependencies:
flutter_test:
sdk: flutter
flutter:
uses-material-design: true
I ran into the same problem turns out the name of my app and the package name were same which resulted into this error.
name of the app scrapy and the dependency was also scrapy...
Changed the name and it worked.
After checking all other solutions if the problem still persists
make sure whether the specified library is installed correctly or not. This error also encounter when the library is not installed correctly.