“Android license status unknown” in flutter doctor

问题

I am getting an error with Android Sdk when I run flutter doctor on command-line

Doctor summary (to see all details, run flutter doctor -v):
[✓] Flutter (Channel beta, v1.4.9-hotfix.1, on Mac OS X 10.14.4 18E226, locale zh-Hans-CN)
[!] Android toolchain - develop for Android devices (Android SDK version 28.0.3)
    ✗ Android license status unknown.
      Try re-installing or updating your Android SDK Manager.
      See https://developer.android.com/studio/#downloads or visit
      https://flutter.io/setup/#android-setup for detailed instructions.
[✓] iOS toolchain - develop for iOS devices (Xcode 10.2)
[✓] Android Studio (version 3.3)
[✓] VS Code (version 1.33.1)
[!] Connected device
    ! No devices available

! Doctor found issues in 2 categories.

After following several possible fixes from the stackoverflow community, i still couldn't get it to work. Please i need assistance.

回答1:

Here's what worked for me

Fix 1:

Launch Android studio & Open the SDK manager (Top-right of Android studio)
Navigate to SDK Tab and look for Android SDK Platform-Tools
If it's checked, unchecked it and click 'Apply' (We're trying to uninstall the previous version)
Now the "SDK Tools" is uninstalled. Let's re-install it by checking the box and clicking 'Apply'
Hit Ok & Restart Android studio
Navigate to SDK install location at %USERPROFILE%\AppData\Local\Android\Sdk for windows, you should see a new folder tools Note: If you don't see the tools folder don't panic, i got you covered.
Open the tools folder & navigate to bin
Copy the folder path (i.e C:\Users\USERNAME%\AppData\Local\Android\Sdk\tools\bin)
Add that path to Environmental variables
Now you should have access to sdkmanager in the command-line. Try it out by typing sdkmanager & hitting enter in CMD.
If you get 'sdkmanager' is not recognized as an internal or external command, operable program or batch file. you probably made a mistake while adding the path to System Environmental Variables. Fix that.
Go to Flutter sdk folder (i.e c:/src/flutter) & launch the flutter_console.bat file
Now type the command flutter doctor --android-licenses and it should work. Accept all by typing y and hitting ENTER
And don't forget to run flutter doctor

Fix 2:

PS: Only if Fix 1 does not work for you!

Open your browser & goto Command line tools only (bottom of the page)
Download the appropriate package for your platform
Unzip it & Yes! You should see the tools folder
After extraction, copy the tools folder to C:\Users\USERNAME%\AppData\Local\Android\Sdk

Now the same as Fix 1 above,
Open the tools folder & navigate to bin
Copy the folder path (i.e C:\Users\USERNAME%\AppData\Local\Android\Sdk\tools\bin)
Add that path to Environmental variables
Now you should have access to sdkmanager in the command-line. Try it out by typing sdkmanager & hitting enter in CMD.
If you get 'sdkmanager' is not recognized as an internal or external command, operable program or batch file. you probably made a mistake while adding the path to System Environmental Variables. Fix that.
NO you're not done
The SDK Platform tools you downloaded is probably outdated (as you can see when you run the sdkmanager command from the command-line)
Now let's handover to Android Studio to do the rest. Restart Android Studio, so it can recognize the tools folder you added.
After Restart, Android Studio should automatically detect the outdated Platform-tools and prompt you to update (You must be connected to the internet!).
IF UPDATE PROMPT DOES NOT SHOW UP
Open SDK Manager in Android studio,
Go to UPDATES
Click Check Now
And you should get the PROMPT to update Platform-Tools

Fix 3:

Do everything in Fix 2
Open Environmental Variables, Create a new Variable JAVA_HOME and set the value to the JRE/bin (get it from Android studio install location in Program Files)
Open the command line type set JAVA_OPTS='-XX:+IgnoreUnrecognizedVMOptions --add-modules java.se.ee' for windows & export JAVA_OPTS='-XX:+IgnoreUnrecognizedVMOptions --add-modules java.se.ee' for Linux

And that's it you can now run flutter doctor --android-licenses on the command-line; Accept all licenses by typing y and hitting ENTER. And don't forget to run flutter doctor

THAT'S THE FIX. I HOPE IT WORKS FOR YOU TOO

来源：https://stackoverflow.com/questions/60869110/android-license-status-unknown-in-flutter-doctor

标签

android

Flutter

android-sdk-tools

android-sdk-manager