Building Flutter App for Android throws an error: error: invalid source release: 17

[samnbd]

If you are looking for help, please confirm the following...

• I confirm I have searched the Docs, Codemagic Sample Projects, and GitHub Discussions.
• I confirm the software versions on my local computer match the ones in CI environment (e.g. Xcode version, Gradle version). See here
• I confirm I am able to do a fresh clone of the repository and build the project on my local computer.

Which mobile framework are you using?

Flutter (Dart)

Steps to reproduce

1.Already have a Flutter app (using Flutter 3.7.11) that was building correctly before
2. Added nordic_dfu Flutter package to my app (latest nordic_dfu version)
3. Generate Android build on Codemagic

Expected results

I expect to build the app correctly without issues.
FYI, the build is being generated correctly on my local machine, but I'm using Java 18.

Actual results

The build fails with the following error:

Execution failed for task ':nordic_dfu:compileReleaseJavaWithJavac'.
> error: invalid source release: 17

And I can't add Java 18 to the environment variables in Codemagic since it's not available as mentioned here

Build id (optional)

No response

[mikhail-tokarev]

Hi

sorry for the late reply. We will pre-install latest Java LTS on our machines, hopefully it will be available next week.

Thank you for bringing this to our attention and sorry again for the delay.

[icarusdust]

Hi @samnbd please note that Java 17 is available on Linux instances. You can specify it incodemagi.yamllike:

environment:
   vars: 
   java: 17

or in the Workflow Editor under the Environment variables section by defining an env var JAVA_HOME and setting its value to /usr/lib/jvm/java-1.17.0-openjdk-amd64

[goncalo-oliveira]

Setting this variable on the Workflow Editor doesn't really work. The machine initialization fails stating it's not a valid format. Maybe this is different for M1 machines?

[icarusdust]

The path I shared above is for setting Java with Linux instances.

The path for Mac environment is different: /Library/Java/JavaVirtualMachines/zulu-17.jdk/Contents/Home

[mohammedbabelly20]

Codemagic machines now have Java 21 (LTS) installed. Check out the machines spec in the docs.