To add some info only - Android's sdkmanager tool (on windows at least) crashes when executing the check. See the discussion here: https://stackoverflow.com/questions/47150410/failed-to-run-sdkmanager-list-android-sdk-with-java-9.

Similar issues here, but minus the crash. Fairly trivial app still runs.

[✓] Flutter (Channel beta, v0.2.3, on Mac OS X 10.12.6 16G1212, locale en-GB)
    • Flutter version 0.2.3 at /Users/ed/devsetups/flutter
    • Framework revision 5a58b36e36 (2 weeks ago), 2018-03-13 13:20:13 -0700
    • Engine revision e61bb9ac3a
    • Dart version 2.0.0-dev.35.flutter-290c576264

[!] Android toolchain - develop for Android devices (Android SDK 27.0.3)
    • Android SDK at /Users/ed/Library/Android/sdk
    • Android NDK location not configured (optional; useful for native profiling support)
    • Platform android-27, build-tools 27.0.3
    • ANDROID_HOME = /Users/ed/Library/Android/sdk
    • Java binary at: /Applications/Android Studio.app/Contents/jre/jdk/Contents/Home/bin/java
    • Java version OpenJDK Runtime Environment (build 1.8.0_152-release-1024-b01)
    ✗ Android license status unknown.

[✓] iOS toolchain - develop for iOS devices (Xcode 9.2)
    • Xcode at /Applications/Xcode.app/Contents/Developer
    • Xcode 9.2, Build version 9C40b
    • ios-deploy 1.9.2
    • CocoaPods version 1.4.0

[✓] Android Studio (version 3.1)
    • Android Studio at /Applications/Android Studio.app/Contents
    • Java version OpenJDK Runtime Environment (build 1.8.0_152-release-1024-b01)

[✓] VS Code (version 1.21.1)
    • VS Code at /Applications/Visual Studio Code.app/Contents
    • Dart Code extension version 2.10.0

[✓] Connected devices (1 available)
    • Android SDK built for x86 • emulator-5554 • android-x86 • Android 5.1.1 (API 22) (emulator)

! Doctor found issues in 1 category. 

I'm not getting any crashes and my app still runs, but flutter doctor complains about license status for me as well after upgrading.

[√] Flutter (Channel beta, v0.2.3, on Microsoft Windows [Version 10.0.16299.309], locale en-US)
    • Flutter version 0.2.3 at C:\Users\Caleb\Google Drive\Android\flutter
    • Framework revision 5a58b36e36 (2 weeks ago), 2018-03-13 13:20:13 -0700
    • Engine revision e61bb9ac3a
    • Dart version 2.0.0-dev.35.flutter-290c576264

[!] Android toolchain - develop for Android devices (Android SDK 27.0.3)
    • Android SDK at C:\Users\Caleb\AppData\Local\Android\sdk
    • Android NDK location not configured (optional; useful for native profiling support)
    • Platform android-27, build-tools 27.0.3
    • Java binary at: C:\Program Files\Android\Android Studio\jre\bin\java
    • Java version OpenJDK Runtime Environment (build 1.8.0_152-release-1024-b02)
    X Android license status unknown.

[√] Android Studio (version 3.1)
    • Android Studio at C:\Program Files\Android\Android Studio
    • Java version OpenJDK Runtime Environment (build 1.8.0_152-release-1024-b02)

[√] VS Code, 64-bit edition (version 1.21.1)
    • VS Code at C:\Program Files\Microsoft VS Code
    • Dart Code extension version 2.11.1

[!] Connected devices
    ! No devices available

! Doctor found issues in 2 categories.

Me too, i have tried installing Android sdk 27.0.3

Hi everyone,
type $flutter doctor --android-licenses
It might say some licenses are not accepted(something like that)
you will be asked 'Do you want to review the licenses'?
typey<press enter>

accept all the licenses review.

now check flutter again with $flutter doctor

Trying @Zedonboy's suggestion gave me some more problems...

flutter doctor --android-licenses
A newer version of the Android SDK is required. To update, run:
C:\Users\Caleb\AppData\Local\Android\sdk\tools\bin\sdkmanager --update

C:\Users\Caleb\AppData\Local\Android\sdk\tools\bin\sdkmanager --update
Exception in thread "main" java.lang.NoClassDefFoundError: javax/xml/bind/annotation/XmlSchema
        at com.android.repository.api.SchemaModule$SchemaModuleVersion.<init>(SchemaModule.java:156)
        at com.android.repository.api.SchemaModule.<init>(SchemaModule.java:75)
        at com.android.sdklib.repository.AndroidSdkHandler.<clinit>(AndroidSdkHandler.java:81)
        at com.android.sdklib.tool.sdkmanager.SdkManagerCli.main(SdkManagerCli.java:73)
        at com.android.sdklib.tool.sdkmanager.SdkManagerCli.main(SdkManagerCli.java:48)
Caused by: java.lang.ClassNotFoundException: javax.xml.bind.annotation.XmlSchema
        at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:582)
        at java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java:190)
        at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:499)
        ... 5 more

@Herohtar - See my reply above. Did that workaround not work?
I submitted a patch for flutter to fix this until the Android tooling issue is resolved.

Android Studio stuff doesn't like Java 9 for whatever reason, simply install and export Java 8 OpenJDK and then rerun, worked for me.

export JAVA_HOME=/usr/lib/jvm/java-8-openjdk-amd64/

I set the JAVA_HOME with the JRE in the Android studio and then flutter doctor --android-licenses just worked. For me, the JRE path was C:\Program Files\Android\Android Studio\jre

@lukef I tried your workaround, but unfortunately it did not do anything for me. Do you need to do something more than just adding the one line in android_sdk.dart?

I was able to make it work using @wongni's method of just pointing JAVA_HOME at the Android Studio JRE, but that doesn't seem ideal.

@Herohtar - if you modify the tools you need to also clear the build tools snapshot to rebuild them otherwise that one line change wont do anything. If you read the link I posted the workaround is to use the SDKMANAGER_OPTS environment variable. That's all that my change is actually doing.

On a mac it would be:

export SDKMANAGER_OPTS="--add-modules java.se.ee"

This should solve the Caused by: java.lang.ClassNotFoundException: javax.xml.bind.annotation.XmlSchema error that you are seeing when sdkmanager is run.

Alternatively, that link offers other suggestions. If you find out that the solution is different, report back.

The link again in case you missed it: https://stackoverflow.com/questions/47150410/failed-to-run-sdkmanager-list-android-sdk-with-java-9.

@lukef The above env var worked for me. Many thanks for this.

@lukef Ah, thanks. It works with your change after deleting the flutter tools snapshot.

i had the same problem. tried all of the above but didn't fix it. what i did is:
Please have backups before continuing, expecially sdkmanager part

went to Environment variables and added ANDROID_HOME with a variable value of: C:\Users\%username%\AppData\Local\Android\Sdk
then my JAVA_HOME with this variable value:
C:\Program Files\Android\Android Studio\jre
then my Path with this variable value:
C:\Users\%username%\flutter\bin

Then I went to C:\Users\%username%\AppData\Local\Android\Sdk\tools\bin
and opened sdkmanager.bat with a note editor, this was my DEFAULT_JVM_OPTS:

@rem Add default JVM options here. You can also use JAVA_OPTS and SDKMANAGER_OPTS to pass JVM options to this script.
set DEFAULT_JVM_OPTS="-Dcom.android.sdklib.toolsdir=%~dp0\.."

Then i ran:
flutter doctor
got output of:

Doctor summary (to see all details, run flutter doctor -v):
[√] Flutter (Channel beta, v0.2.3, on Microsoft Windows [Version 10.0.16299.309], locale en-US)
[!] Android toolchain - develop for Android devices (Android SDK 27.0.3)
    ! Some Android licenses not accepted.  To resolve this, run: flutter doctor --android-licenses
[√] Android Studio (version 3.1)
[√] Connected devices (1 available)

! Doctor found issues in 1 category.

Then i ran
flutter doctor --android-licenses
and accepted all Terms & Conditions with (y)

This solved my problems. hope it helps you.

Fix was reverted because it introduced other problems. Re-opening.

FYI, the other problems that it introduced are detailed in #16228

i have this same issue, i tried
flutter doctor --android-licenses
it show me this message

A newer version of the Android SDK is required. To update, run:
F:\Sdk\tools\bin\sdkmanager --update

and sdkmanager --update give me this warning

Warning: File C:\Users\Amine\.android\repositories.cfg could not be loaded.
done

i checked that path there no file named repositories.cfg
and then i updated sdk manager from android studio
and still have the same issue

flutter doctor -v

[√] Flutter (Channel beta, v0.2.3, on Microsoft Windows [Version 10.0.16299.309], locale en-US)
    • Flutter version 0.2.3 at F:\flutter
    • Framework revision 5a58b36e36 (3 weeks ago), 2018-03-13 13:20:13 -0700
    • Engine revision e61bb9ac3a
    • Dart version 2.0.0-dev.35.flutter-290c576264

[!] Android toolchain - develop for Android devices (Android SDK 27.0.3)
    • Android SDK at F:\Sdk
    • Android NDK location not configured (optional; useful for native profiling support)
    • Platform android-P, build-tools 27.0.3
    • ANDROID_HOME = F:\Sdk
    • Java binary at: C:\Program Files\Android\Android Studio\jre\bin\java
    • Java version OpenJDK Runtime Environment (build 1.8.0_152-release-1024-b02)
    X Android license status unknown.

[√] Android Studio (version 3.1)
    • Android Studio at C:\Program Files\Android\Android Studio
    • Java version OpenJDK Runtime Environment (build 1.8.0_152-release-1024-b02)

[√] VS Code, 64-bit edition (version 1.20.1)
    • VS Code at C:\Program Files\Microsoft VS Code
    • Dart Code extension version 2.9.2

[!] Connected devices
    ! No devices available

! Doctor found issues in 2 categories.

@AmineMersoul

Got the same issue, I've tried to create an empty repositories.cfg file but Android license status unknown. still remain.

Ref: https://stackoverflow.com/questions/43433542/stuck-at-android-repositories-cfg-could-not-be-loaded

Here is how I fixed this issue #16280 on my Mac :-)

@lukef do you know if there's a way to re-introduce #16035 in such a way as to avoid #16228?

I encountered this problem on MacOS just now, it turned out to be a lack of JDK. Here is my solution:

1. http://www.oracle.com/technetwork/java/javase/downloads/jdk10-downloads-4416644.html download and install jdk
2. set JAVA_HOME environment, e.g. export JAVA_HOME=/Library/Java/JavaVirtualMachines/jdk-10.jdk/Contents/Home
3. run flutter doctor -v again, if you see something like:

Some Android licenses not accepted. To resolve this, run: flutter doctor --android-licenses

then run command flutter doctor --android-licenses and accept licenses.
Hope this will be helpful.

@tvolkert - sorry for the late reply.

I have a valid JAVA_HOME and am using Java 9. I can upgrade to Java 10 and try again.

I thought the flag would be ignored by Java 8 and below (I think this is a java 9+ flag). Sorry about that.

With that said, I feel like there may be an inherent danger in solving this problem via code as, ultimately, the fix belongs in the Android tooling and not in Flutter. Maybe this is a documentation issue instead. The overall workarounds available now are:

• If using Java 9+, document that the environment variable to allow execution of the module is required: export SDKMANAGER_OPTS="--add-modules java.se.ee"
• Force people to use Java 8 or below

It's annoying to ask people to add yet another environment variable, so I could see that as being unacceptable, but it will fix the issue.

Otherwise, we could attempt to detect the installed Java version and apply the flag conditionally. This is probably super hard across all platforms to do it consistently.

i have both Java 8 and 9 installed in my computer
but in windows environment variables path i set JAVA_HOME to C:\Program Files\Java\jdk1.8.0_151
i still have the problem

@lukef we already have code that tries to validate the Java version, so that ship's already sailed:

You could refactor that such that we had a String get javaVersion getter that we could consult in the sdkManagerEnv getter...

I set the JAVA_HOME with the JRE in the Android studio and then flutter doctor --android-licenses just worked. For me, the JRE path was C:\Program Files\Android\Android Studio\jre

This worked for me

Trying @Zedonboy's suggestion gave me some more problems...

flutter doctor --android-licenses
A newer version of the Android SDK is required. To update, run:
C:\Users\Caleb\AppData\Local\Android\sdk\tools\bin\sdkmanager --update

C:\Users\Caleb\AppData\Local\Android\sdk\tools\bin\sdkmanager --update
Exception in thread "main" java.lang.NoClassDefFoundError: javax/xml/bind/annotation/XmlSchema
        at com.android.repository.api.SchemaModule$SchemaModuleVersion.<init>(SchemaModule.java:156)
        at com.android.repository.api.SchemaModule.<init>(SchemaModule.java:75)
        at com.android.sdklib.repository.AndroidSdkHandler.<clinit>(AndroidSdkHandler.java:81)
        at com.android.sdklib.tool.sdkmanager.SdkManagerCli.main(SdkManagerCli.java:73)
        at com.android.sdklib.tool.sdkmanager.SdkManagerCli.main(SdkManagerCli.java:48)
Caused by: java.lang.ClassNotFoundException: javax.xml.bind.annotation.XmlSchema
        at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:582)
        at java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java:190)
        at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:499)
        ... 5 more

I had the same issue, and it was solved when I downgraded java from java 13 to java 8.

in terminal set java 1.8 home path

export JAVA_HOME="/Applications/Android Studio.app/Contents/jre/jdk/Contents/Home"
then

try

/Users/mac/Library/Android/sdk/tools/bin/sdkmanager --update

DISCLAIMER. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

Accept? (y/N): y
...

In order to fix this, I uninstalled JDK 13 that I had installed earlier, then :

1. Install JDK 8
2. flutter doctor --android-licenses

Hope this helps... ^_^

Important update

OpenJDK 10 was superseeded by OpenJDK 11, which doesn't implement java.se.ee at all. This means that the hack of adding --add-modules java.se.ee doesn't do anything anymore. It also means that OpenJDK 10 will be automatically removed from your system and replaced with OpenJDK 11 the next time you update, if your updates are configured properly.

To fix that, modify sdkmanager to use Java 8 by setting JAVA_HOME inside sdkmanager to a Java 8 installation. It's still, by default, at ~/Android/Sdk/tools/bin/sdkmanager.

# Add default JVM options here. You can also use JAVA_OPTS and SDKMANAGER_OPTS to pass JVM options $
JAVA_HOME=/usr/lib/jvm/java-1.8.0-openjdk-amd64
DEFAULT_JVM_OPTS='"-Dcom.android.sdklib.toolsdir=$APP_HOME" -XX:+IgnoreUnrecognizedVMOptions'

@rem Add default JVM options here. You can also use JAVA_OPTS and SDKMANAGER_OPTS to pass JVM options to this script.
set JAVA_HOME="C:\ProgramData\scoop\apps\android-studio\current\jre"
set DEFAULT_JVM_OPTS="-Dcom.android.sdklib.toolsdir=%~dp0\.."

This way, you can keep using a sane and maintained version of Java on your system while simultaneously using sdkmanager.

# Java
export JAVA_HOME=/usr/lib/jvm/default-java

And now I've got some pipelines to repair.

To fix that, modify sdkmanager to use Java 8 by setting JAVA_HOME inside sdkmanager to a Java 8 installation. It's still, by default, at ~/Android/Sdk/tools/bin/sdkmanager.

I am just starting up with all these things.
Can you please tell me how to modify sdkmanager to use Java 8 by setting JAVA_HOME inside sdkmanager to a Java 8 installation. Like actually how to access JAVA_HOME inside sdkmanager since its a exec file.

update android sdk in android studio... It worked for me. because if you updated your flutter, it needs also the updated version of the sdk. for the environment to work properly

RESOLVED ,
before I use JDK 13 (newver) and found this issue sdk unknow , then I uninstall jdk 13 then install jdk 8 , update your variable JAVA_HOME , then restart your computer , then run flutter doctor ,

Microsoft Windows [Version 10.0.17763.973]
(c) 2018 Microsoft Corporation. All rights reserved.

C:\Users\karmadi>flutter doctor

Doctor summary (to see all details, run flutter doctor -v):
[√] Flutter (Channel stable, v1.9.1+hotfix.6, on Microsoft Windows [Version 10.0.17763.973], locale en-US)

[!] 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
[√] Android Studio (version 3.5)
[√] VS Code (version 1.41.1)
[!] Connected device
! No devices available

! Doctor found issues in 2 categories.

C:\Users\karmadi>flutter doctor --android-licenses
Warning: File C:\Users\karmadi.android\repositories.cfg could not be loaded.
6 of 7 SDK package licenses not accepted. 100% Computing updates...
Review licenses that have not been accepted (y/N)? y
*** and then will show more angreement you have to tap y**
until this message come out
All SDK package licenses accepted

C:\Users\karmadi>flutter doctor
Doctor summary (to see all details, run flutter doctor -v):
[√] Flutter (Channel stable, v1.9.1+hotfix.6, on Microsoft Windows [Version 10.0.17763.973], locale en-US)

[√] Android toolchain - develop for Android devices (Android SDK version 29.0.2)
[√] Android Studio (version 3.5)
[√] VS Code (version 1.41.1)
[!] Connected device
! No devices available

! Doctor found issues in 1 category.

I use sdkman

I can run flutter doctor --android-licenses successfully after running the command below and set it to default

$ sdk install java 8.0.242.j9-adpt

Downloading: java 8.0.242.j9-adpt

In progress...

############################################################################################################### 100.0%############################################################################################################### 100.0%

Repackaging Java 8.0.242.j9-adpt...

Done repackaging...

Installing: java 8.0.242.j9-adpt
Done installing!

Do you want java 8.0.242.j9-adpt to be set as default? (Y/n): 

Setting java 8.0.242.j9-adpt as default.

@NatoBoram I think locking this ticket is better if there is no need for it for the future.

Just run CMD as admin

I have accepted all the licences and suddenly they are 'forgotten'.....
Does anyone know how to solve this problem? Where does it come from? What is missing? What is the best way in 2020 to solve this problem?

Doctor summary (to see all details, run flutter doctor -v):
[√] Flutter (Channel dev, v1.15.3, on Microsoft Windows [version 10.0.18363.657], locale fr-FR)
[!] Android toolchain - develop for Android devices (Android SDK version 29.0.3)
X Android license status unknown.
Try re-installing or updating your Android SDK Manager.
See https://developer.android.com/studio/#downloads or visit https://flutter.dev/setup/#android-setup for detailed instructions.
[√] Android Studio (version 3.5)
[√] Connected device (1 available)

flutter doctor --android-licenses
A newer version of the Android SDK is required. To update, run:
C:\xxxxx\tools\bin\sdkmanager --update

flutter doctor --android-licenses -v
A newer version of the Android SDK is required. To update, run:
C:\xxxxxx\tools\bin\sdkmanager --update

#0 throwToolExit (package:flutter_tools/src/base/common.dart:14:3)
#1 AndroidLicenseValidator.runLicenseManager (package:flutter_tools/src/android/android_workflow.dart:365:7)
#2 Doctor.diagnose (package:flutter_tools/src/doctor.dart:245:38)
#3 DoctorCommand.runCommand (package:flutter_tools/src/commands/doctor.dart:58:39)
#4 FlutterCommand.verifyThenRunCommand (package:flutter_tools/src/runner/flutter_command.dart:668:18)
#5 _rootRunUnary (dart:async/zone.dart:1134:38)
#6 _CustomZone.runUnary (dart:async/zone.dart:1031:19)
#7 _FutureListener.handleValue (dart:async/future_impl.dart:140:18)
#8 Future._propagateToListeners.handleValueCallback (dart:async/future_impl.dart:682:45)
#9 Future._propagateToListeners (dart:async/future_impl.dart:711:32)
#10 Future._completeWithValue (dart:async/future_impl.dart:526:5)
#11 Future._asyncComplete. (dart:async/future_impl.dart:556:7)
#12 _rootRun (dart:async/zone.dart:1126:13)
#13 _CustomZone.run (dart:async/zone.dart:1023:19)
#14 _CustomZone.runGuarded (dart:async/zone.dart:925:7)
#15 _CustomZone.bindCallbackGuarded. (dart:async/zone.dart:965:23)
#16 _microtaskLoop (dart:async/schedule_microtask.dart:43:21)
#17 _startMicrotaskLoop (dart:async/schedule_microtask.dart:52:5)
#18 _runPendingImmediateCallback (dart:isolate-patch/isolate_patch.dart:118:13)
#19 _RawReceivePortImpl._handleMessage (dart:isolate-patch/isolate_patch.dart:169:5)

sdkmanager --update in a flutter app
Exception in thread "main" java.lang.NoClassDefFoundError: javax/xml/bind/annotation/X
mlSchema
at com.android.repository.api.SchemaModule$SchemaModuleVersion.(SchemaMo
dule.java:156)
at com.android.repository.api.SchemaModule.(SchemaModule.java:75)
at com.android.sdklib.repository.AndroidSdkHandler.(AndroidSdkHandler.
java:81)
at com.android.sdklib.tool.sdkmanager.SdkManagerCli.main(SdkManagerCli.java:73

sdkmanager --update in an android app
Exception in thread "main" java.lang.NoClassDefFoundError: javax/xml/bind/annotation/XmlSchema
at com.android.repository.api.SchemaModule$SchemaModuleVersion.(SchemaModule.java:156)
at com.android.repository.api.SchemaModule.(SchemaModule.java:75)
at com.android.sdklib.repository.AndroidSdkHandler.(AndroidSdkHandler.java:81)
at com.android.sdklib.tool.sdkmanager.SdkManagerCli.main(SdkManagerCli.java:73)
at com.android.sdklib.tool.sdkmanager.SdkManagerCli.main(SdkManagerCli.java:48)
Caused by: java.lang.ClassNotFoundException: javax.xml.bind.annotation.XmlSchema
at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:602)
at java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java:178)
at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:521)
... 5 more

This is really a serious problem

@NatoBoram I think locking this ticket is better if there is no need for it for the future.

unfortunately it is not the case...

@benedicte69 Have you read through this thread and tried any solutions? Specifically, have you tried the solution listed here?

I set the JAVA_HOME with the JRE in the Android studio and then flutter doctor --android-licenses just worked. For me, the JRE path was C:\Program Files\Android\Android Studio\jre

THANK YOU!!!!!!!

Congrats and many thanks @GuilhermeEsdras ! That is the most update answer I have read until now! For sure Gradlew will not complain about any bad JAVA_HOME that way.
It solved my android licenses (despite a wraning : .android\repositories.cfg could not be loaded.)

please help me out...
thing happens with me is-

$ flutter doctor -v
[√] Flutter (Channel stable, v1.12.13+hotfix.8, on Microsoft Windows [Version 10.0.17763.1098], locale en-IN)
• Flutter version 1.12.13+hotfix.8 at C:\Users\asus\Desktop\flutter_windows_v1.12.13+hotfix.8-stable\flutter
• Framework revision 0b8abb4 (5 weeks ago), 2020-02-11 11:44:36 -0800
• Engine revision e1e6ced
• Dart version 2.7.0

[!] Android toolchain - develop for Android devices (Android SDK version 29.0.2)
• Android SDK at C:\Users\asus\AppData\Local\Android\sdk
• Android NDK location not configured (optional; useful for native profiling support)
• Platform android-R, build-tools 29.0.2
• Java binary at: C:\Program Files\Android\Android Studio\jre\bin\java
• Java version OpenJDK Runtime Environment (build 1.8.0_212-release-1586-b04)
X Android license status unknown.
Try re-installing or updating your Android SDK Manager.
See https://developer.android.com/studio/#downloads or visit https://flutter.dev/setup/#android-setup for detailed instructions.

[√] Android Studio (version 3.6)
• Android Studio at C:\Program Files\Android\Android Studio
• Flutter plugin version 44.0.2
• Dart plugin version 192.7761
• Java version OpenJDK Runtime Environment (build 1.8.0_212-release-1586-b04)

[√] VS Code (version 1.43.0)
• VS Code at C:\Users\asus\AppData\Local\Programs\Microsoft VS Code
• Flutter extension version 3.8.1

[!] Connected device
! No devices available

! Doctor found issues in 2 categories.

I have the same issue.

Just open android studio and get the sdk manager installed.
Rerun the flutter doctor. It will tell you to accept the unaccepted android licenses.

If you want to fix this problem then simply download Android Studio 3.5.2 from this link Download Android Studio 3.5.3 and then install it after removing the android studio that you have installed in your system. After installing it open it and do the same as you do with other android studio versions means install all the SDKs and just open cmd and hit flutter doctor and now android studio license status unknown error fixed.

Thanks!

For those who are still facing the issue and if you have android studio installed then

1. open sdk manager
2. under sdk tools uncheck hide obsolete packages at the bottom
3. then you should see an option called Android Sdk Tools (Obsolete)
4. check it and apply and let the studio download the package
5. once done run the command flutter doctor and it should now prompt you to run flutter doctor --android-licenses once you run the license command accept all licenses by hitting y and it should solve the problem

for more detailed answer please see this answer https://stackoverflow.com/a/60705505/8253662 hope this helps

Have Android ASK (Obsolete)

Now
D:\flutter\bin>flutter doctor --android-licenses
A newer version of the Android SDK is required. To update, run:
C:\Users\sunuw\AppData\Local\Android\sdk\tools\bin\sdkmanager --update

D:\flutter\bin>C:\Users\sunuw\AppData\Local\Android\sdk\tools\bin\sdkmanager --update
Warning: Could not create settings
java.lang.IllegalArgumentException
at com.android.sdklib.tool.sdkmanager.SdkManagerCliSettings.(SdkManagerCliSettings.java:428)
at com.android.sdklib.tool.sdkmanager.SdkManagerCliSettings.createSettings(SdkManagerCliSettings.java:152)
at com.android.sdklib.tool.sdkmanager.SdkManagerCliSettings.createSettings(SdkManagerCliSettings.java:134)
at com.android.sdklib.tool.sdkmanager.SdkManagerCli.main(SdkManagerCli.java:57)
at com.android.sdklib.tool.sdkmanager.SdkManagerCli.main(SdkManagerCli.java:48)
Usage:
sdkmanager [--uninstall] [] [--package_file=] [...]
sdkmanager --update []
sdkmanager --list []
sdkmanager --licenses []
sdkmanager --version

With --install (optional), installs or updates packages.
By default, the listed packages are installed or (if already installed)
updated to the latest version.
With --uninstall, uninstall the listed packages.

<package> is a sdk-style path (e.g. "build-tools;23.0.0" or
         "platforms;android-23").
<package-file> is a text file where each line is a sdk-style path
               of a package to install or uninstall.
Multiple --package_file arguments may be specified in combination
with explicit paths.

With --update, all installed packages are updated to the latest version.

With --list, all installed and available packages are printed out.

With --licenses, show and offer the option to accept licenses for all
available packages that have not already been accepted.

With --version, prints the current version of sdkmanager.

Common Arguments:
--sdk_root=: Use the specified SDK root instead of the SDK
containing this tool

--channel=<channelId>: Include packages in channels up to <channelId>.
                       Common channels are:
                       0 (Stable), 1 (Beta), 2 (Dev), and 3 (Canary).

--include_obsolete: With --list, show obsolete packages in the
                    package listing. With --update, update obsolete
                    packages as well as non-obsolete.

--no_https: Force all connections to use http rather than https.

--proxy=<http | socks>: Connect via a proxy of the given type.

--proxy_host=<IP or DNS address>: IP or DNS address of the proxy to use.

--proxy_port=<port #>: Proxy port to connect to.

--verbose: Enable verbose output.

• If the env var REPO_OS_OVERRIDE is set to "windows",
  "macosx", or "linux", packages will be downloaded for that OS.
  

I'm using this solution but looks like flutter still looking for android/tools directory
Tried to symlink the directory, doesn't work
If I'm install cmdtools with android/tools directory, it would give error like this
Warning: Could not create settings java.lang.IllegalArgumentException

can somebody elaborate?

Android SDK Manager Tool is missing from new android studio build. !!!

Android SDK Manager Tool is missing from new android studio build. !!!

Go to Tools -> SDK Manager -> SDK Tools
Select & install SDK Tools

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