Android License problem

[Richard Lamb]

I'm new to Flutter development.  When running the flutter doctor (see output below), I got a message to run flutter doctor again to accept licenses.  However when I run it again (see output below), I get a Java error message.

Anyone have a clue how to remedy this?

Thanks,

Rich

Output from flutter doctor commands:

C:\src\flutter\bin>flutter doctor

Doctor summary (to see all details, run flutter doctor -v):

[√] Flutter (Channel stable, 2.2.0, on Microsoft Windows [Version

    10.0.19043.985], locale en-US)

[!] Android toolchain - develop for Android devices (Android SDK version 30.0.3)

    X Android license status unknown.

      Run `flutter doctor --android-licenses` to accept the SDK licenses.

      See https://flutter.dev/docs/get-started/install/windows#android-setup for

      more details.

[√] Chrome - develop for the web

[!] Android Studio (not installed)

[√] Connected device (2 available)

! Doctor found issues in 2 categories.

C:\src\flutter\bin>flutter doctor --android-licenses

Error: Could not find or load main class Files

Caused by: java.lang.ClassNotFoundException: Files

C:\src\flutter\bin>

[Benedicte Roussel]

Hi Richard,

you have the answer in your message:

  Run `flutter doctor --android-licenses` to accept the SDK licenses and then follow the instructions which should be 'yes' at each licenses missing

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[Richard Lamb]

Hi Bened,

Thanks for the quick reply.  I did try 'flutter doctor --android-licenses'.  That resulted in the Java error,  shown at the bottom of my message.

I've replicated that below:

C:\src\flutter\bin>flutter doctor --android-licenses

Error: Could not find or load main class Files

Caused by: java.lang.ClassNotFoundException: Files

Best,

Rich

[Konrad Neitzel]

That seems to be a sdkmanager problem (and not a flutter problem).

Go to the android sdk location and try to run sdkmanager manually (from inside tools\bin).

You need to call sdkmanager —licenses to accept all licenses (and I think flutter doctor is not doing anything else).

Kind regards,

Konrad

[Richard Lamb]

Thanks.  Still no success, but getting closer.  sdkmanager.exe was in the folder:

c:\program files (x86)\android\android-sdk\cmdline-tools\latest\bin 

I got the same Java error when running sdkmanager -licenses

So, at least I know the program that is causing the error (I think).

Best,

Rich

On Wednesday, May 26, 2021 at 4:52:52 PM UTC-7 Bened wrote:

[Rajil VEMBE]

install again sdk  dart ans flirter

See if path are well config (Android path and ...)

Repeat again

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[Konrad Neitzel]

I would simply check if there is a valid Java installation on the path. (e.g. call java -version)

One try to fix this could be to get an Java 8 (e.g. from https://adoptopenjdk.net/, feel free to get the zip file and then set JAVA_HOME and PATH so that it is used if you do not want to install it fully through an MSI - so if you unzip it to c:\Apps\openjdk-8 then you need:
SET JAVA_HOME=c:\Apps\openjdk-8
SET PATH=%JAVA_HOME%\bin;%PATH%
I just hope that I have no typing mistake - have no windows system to test it right now.)
Once you get a good response of java 8 with a java -version, you should try the sdkmanager call again.

From my perspective it is not a problem with the flutter files and i even doubt that the core android sdk installation has a problem. it seems to be a problem with Java.

Kind regards,

Konrad

[Benedicte Roussel]

Hi Richard,

Do you have in your SDK tools the Android sdk build tools 31 rc 4 fully installed and in your SDK Platforms Android S Preview fully installed? Check also in SDK tools if anything else needs to be loaded as plain updates do not necessarily download things along.

Envoyé depuis Yahoo Mail pour Android

Le jeu., mai 27, 2021 à 8:36, Konrad Neitzel

<kon...@kneitzel.de> a écrit :

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[Richard Lamb]

Alright!  I finally got the problem resolved.  The solution was uninstalling Android Studio, Android-SDK, and Java (version 16).  I then made sure that there were no remaining "bits" to any of those applications in the Program Files and Program Files (x86) folders.  Then, I reinstalled Android Studio, Android-SDK, and Java 8 SE (from Oracle site).  For some reason, I had to install the Android-SDK in a non-standard folder (it did not  want to install in Program Files (x86)).  So, I ran flutter doctor to assert the path to the SDK.  After that, everything just seems to be working.  

In the end, I think the problem may have been the installation of Java 16 (the latest), but I decided to start over from a (mostly) clean slate (I kept the install of Flutter).

Thanks for all of the help on this.  I am comforted by the quick community support I received.

Best to all of you!

Rich

 

[Rajil VEMBE]

Nice enjoy your code !

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