I am trying to migrate my Flutter/Dart project to use null safety. I have updated all of my dependencies and changed the sdk to use ">=2.12.0 <3.0.0". However, when I try to use the migration tool I get the following error:
When I look at my flutter and dart versions everything seems fine. I may be looking at it wrong, but below is the output from flutter doctor and brew info dart:
% flutter doctor
Doctor summary (to see all details, run flutter doctor -v):
[✓] Flutter (Channel stable, 2.0.6, on macOS 11.4 20F71 darwin-x64, locale en-US)
[!] Android toolchain - develop for Android devices (Android SDK version 30.0.2)
! Some Android licenses not accepted. To resolve this, run: flutter doctor --
android-licenses
[✓] Xcode - develop for iOS and macOS
[✓] Chrome - develop for the web
[✓] Android Studio (version 4.0)
[✓] VS Code (version 1.57.0)
[✓] Connected device (2 available)
! Doctor found issues in 1 category.
% brew info dart
dart-lang/dart/dart: stable 2.12.4, HEAD
The Dart SDK
https://dart.dev
Conflicts with:
dart-beta (because dart-beta ships the same binaries)
/usr/local/Cellar/dart/2.9.3 (509 files, 523.7MB) *
Built from source on 2020-09-14 at 16:52:16
From: https://github.com/dart-lang/homebrew-dart/blob/HEAD/dart.rb
==> Options
--HEAD
Install HEAD version
==> Caveats
Please note the path to the Dart SDK:
/usr/local/opt/dart/libexec
I'm suspecting that maybe I don't have the latest dart sdk like I believe I do. If that's the case then how do I upgrade without breaking anything?
UPDATE:
It appears I am using the latest version of dart. Going into the settings in Android Studio I can see it is pointing at the dart sdk that ships with flutter:
Have you run "flutter upgrade" in your terminal?
Related
Flutter doctor showing issues at IntelliJ Idea. How can I fix this issue?
I had the same problem. In my specific case I simply:
Downgraded to version 2021.2.4
Cleared the download cash.
Restarted my machine
At this point, Flutter Doctor was no longer returning an error. (But I was in the old version of IntelliJ IDEA).
Then I reinstalled the new version 2021.3.
Cleared the download cash.
Updated all plugins, invalidate caches and restart.
Upgrade Flutter to 2.8.1.
Restarted my machine.
Now I have no more errors.
Doctor summary (to see all details, run flutter doctor -v):
[✓] Flutter (Channel stable, 2.8.1, on macOS 12.1 21C52 darwin-arm, locale fr-BE)
[✓] Android toolchain - develop for Android devices (Android SDK version 31.0.0)
[✓] Xcode - develop for iOS and macOS (Xcode 13.2.1)
[✓] Chrome - develop for the web
[!] Android Studio (not installed)
[✓] IntelliJ IDEA Ultimate Edition (version 2021.3)
[✓] VS Code (version 1.63.2)
[✓] Connected device (2 available)
! Doctor found issues in 1 category.
There are few step to follow that may help you
Close the editor
Go to console
Set the path of your Editor to flutter directory by using this command
flutter config --android-studio-dir="Path of your code editor"
make sure that you have double quotes around the path.
I am trying to create icons for my app using flutter_launcher_icons, with options defined in pubspec.yaml. When I run flutter pub run flutter_launcher_icons:main, I get the following error:
Unable to spawn isolate: error: Library 'file:///Users/cameron/flutter/.pub-cache/hosted/pub.dartlang.org/flutter_launcher_icons-0.9.0/bin/main.dart' was compiled with sound null safety (in strong mode) and it requires --sound-null-safety option at runtime
pub finished with exit code 1
Even if I pass in --sound-null-safety, the error persists (I also tried '--no-sound-null-safety' which also did nothing).
To check it wasn't a configuration error, I ran flutter create <name>, added flutter_launcher_icons: to dev dependencies (and flutter pub get), ran the same command and got the same error.
I am on Flutter 2.2, and I depend on integration_test, so I can't downgrade to a pre-null-safety version of flutter_launcher_icons, because those versions have transitive dependencies that conflict with integration_test from sdk.
Flutter doctor:
Doctor summary (to see all details, run flutter doctor -v):
[✓] Flutter (Channel stable, 2.2.2, on macOS 11.4 20F71 darwin-x64, locale en-GB)
[✓] Android toolchain - develop for Android devices (Android SDK version 30.0.3)
[✓] Xcode - develop for iOS and macOS
[✓] Chrome - develop for the web
[✓] Android Studio (version 4.1)
[✓] IntelliJ IDEA Ultimate Edition (version 2020.3.4)
[✓] VS Code (version 1.57.1)
[✓] Connected device (2 available)
• No issues found!
I am running flutter doctor command. But it is saying android studio is not installed many times. I tried flutter config --android-studio-dir=/home/khamidjon/.android, and many more paths I tried to show but to no luck.
flutter doctor
Doctor summary (to see all details, run flutter doctor -v):
[✓] Flutter (Channel stable, 2.0.1, on Linux, locale en_US.UTF-8)
[✓] Android toolchain - develop for Android devices (Android SDK version 30.0.2)
[✓] Chrome - develop for the web
[!] Android Studio
✗ android-studio-dir = /home/khamidjon/.android
✗ Unable to find bundled Java version.
[✓] IntelliJ IDEA Community Edition (version 2020.3)
[✓] Connected device (1 available)
! Doctor found issues in 1 category.
My question is what location should be shown for PATH in flutter config --android-studio-dir='PATH'?
For Android Studio installed with Flatpak, i found this config to work:
flutter config --android-studio-dir=/path/to/home/.local/share/flatpak/app/com.google.AndroidStudio/current/active/files/extra/android-studio
Where path/to/home is the path to your home directory.
(Ubuntu 21.10/Pop!_OS)
Snap packages are installed under /snap/appname/ with subdirectories for each new version. Try this to reslove the issue, it worked for me.
flutter config --android-studio-dir="/snap/android-studio/current/android-studio"
The current directory will make sure that it always points to the latest version.
if you have Androind Studio installed in your home directory /home/khamidjon set up PATH like this: /home/khamidjon/android-studio/bin
to append variable in Linux use command
export PATH=$PATH:/some/new/path
to check your PATH use
echo $PATH
In my case snap packages can retain old versions of the program. So inside /snap/android-studio There were 2 versions of android studio inside directories /snap/android-studio/99 and /snap/android-studio/100. So I showed one of these paths: directory /snap/android-studio/100/android-studio with latest version.
So I ran:
flutter config --android-studio-dir=/snap/android-studio/100/android-studio
flutter doctor
Result:
Doctor summary (to see all details, run flutter doctor -v):
[✓] Flutter (Channel stable, 2.0.1, on Linux, locale en_US.UTF-8)
[✓] Android toolchain - develop for Android devices (Android SDK version 30.0.2)
[✓] Chrome - develop for the web
[✓] Android Studio
[✓] IntelliJ IDEA Community Edition (version 2020.3)
[✓] Connected device (2 available)
• No issues found!
In windows
if your Android Studio install by default, you can use this command
flutter config --android-studio-dir="C:\Program Files\Android\Android Studio"
after this command, flutter can found android studio, but the plugin can't...
flutter doctor
Doctor summary (to see all details, run flutter doctor -v):
[√] Flutter (Channel stable, 1.20.2, on Microsoft Windows [Version 10.0.18363.1016], locale zh-CN)
[√] Android toolchain - develop for Android devices (Android SDK version 30.0.2)
[!] Android Studio
X Flutter plugin not installed; this adds Flutter specific functionality.
X Dart plugin not installed; this adds Dart specific functionality.
[√] VS Code (version 1.48.0)
[!] Connected device
! No devices available
! Doctor found issues in 2 categories.
In Linux (Ubuntu)
Note: for those who are facing the problem in Ubuntu and Android Studio is installed with snap:
flutter config --android-studio-dir="/snap/android-studio/current/android-studio"
Note: for those who are facing the problem in Ubuntu and Android Studio is installed with JetBrains Toolbox:
flutter config --android-studio-dir=/home/myuser/.local/share/JetBrains/Toolbox/apps/AndroidStudio/ch-0/201.7042882
Where ./201.7042822 matches the current version of Android Studio installed. You'll have to check which one you have and update it in the command above.
My Flutter App is not compiling because of this error:
Couldn't read file Instance of 'ErrorHandlingFile' even though it
exists. Please verify that this file has read permission and try again
I tired switching channels and changing versions but nothing has worked yet.
Doctor summary (to see all details, run flutter doctor -v):
[✓] Flutter (Channel beta, v1.13.6, on Mac OS X 10.15.1 19B88, locale de-DE)
[✓] Android toolchain - develop for Android devices (Android SDK version 28.0.3)
[✓] Xcode - develop for iOS and macOS (Xcode 11.2.1)
[✓] Chrome - develop for the web
[✓] Android Studio (version 3.5)
[!] Android Studio
✗ Flutter plugin not installed; this adds Flutter specific functionality.
✗ Dart plugin not installed; this adds Dart specific functionality.
✗ Android Studio not found at /Applications/Android/Contents
[!] IntelliJ IDEA Community Edition (version 2019.2.3)
✗ Flutter plugin not installed; this adds Flutter specific functionality.
✗ Dart plugin not installed; this adds Dart specific functionality.
[✓] VS Code (version 1.36.1)
[✓] Connected device (3 available)
! Doctor found issues in 2 categories.
Any Ideas?
Had the same problem after upgrade to beta channel.
Found that this error message just a top of an iceberg, real problem is in one of your plugins.
Read the discussion in this issue to manually debug your application or wait for fix which will result in an appropriate error message.
If you are lucky - simple flutter pub upgrade will solve the issue for your project.
If not, as a hot-fix you can downgrade your flutter version.
I have run:
export ENABLE_FLUTTER_DESKTOP=true
flutter channel master
flutter upgrade
Then on flutter doctor i get no devices available:
flutter doctor
Doctor summary (to see all details, run flutter doctor -v):
[✓] Flutter (Channel master, v1.10.15-pre.357, on Mac OS X 10.14.6 18G103, locale en-IL)
[!] Android toolchain - develop for Android devices (Android SDK version 29.0.2)
! Some Android licenses not accepted. To resolve this, run: flutter doctor --android-licenses
[✓] Xcode - develop for iOS and macOS (Xcode 11.1)
[✓] Android Studio (version 3.4)
[!] IntelliJ IDEA Ultimate Edition (version 2019.1.3)
✗ Flutter plugin not installed; this adds Flutter specific functionality.
✗ Dart plugin not installed; this adds Dart specific functionality.
[!] IntelliJ IDEA Community Edition (version 2019.1.1)
✗ Flutter plugin not installed; this adds Flutter specific functionality.
✗ Dart plugin not installed; this adds Dart specific functionality.
[✓] VS Code (version 1.39.2)
[!] Connected device
! No devices available
! Doctor found issues in 4 categories.
Did I miss anything? (I'm looking to develop a desktop app so not android emulator / ios emulator)
Whatever instructions you are following are out of date; ENABLE_FLUTTER_DESKTOP hasn't been the supported or documented way to enable experimental desktop support for several months (and the legacy code for it was recently removed). You need to enable it with flutter config as documented in the official instructions
Just Enable flutter desktop
flutter config --enable-macos-desktop