Java -version is 21.0 but Flutter doctor shows Java 11.0

[sampaio96]

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

Hi. I am trying to use Java 21.0.5 to build an Android app.

As suggested in #2132, I used the Workflow Visual Editor to set JAVA_HOME = /Library/Java/JavaVirtualMachines/zulu-21.jdk/Contents/Home.

Expected results

The version of Java in the environment is correctly set to 21.0, but it seems that Flutter is still using Java 11, which is the version on Android Studio.

Actual results

Results of java -version:
(Java 21.0.5)

openjdk version "21.0.5" 2024-10-15 LTS
OpenJDK Runtime Environment Zulu21.38+21-CA (build 21.0.5+11-LTS)
OpenJDK 64-Bit Server VM Zulu21.38+21-CA (build 21.0.5+11-LTS, mixed mode, sharing)

Results of flutter doctor -v (version 11):
(Java 11.0.13)

[✓] Android toolchain - develop for Android devices (Android SDK version 33.0.0)
    • Android SDK at /usr/local/share/android-sdk
    • Platform android-33, build-tools 33.0.0
    • ANDROID_HOME = /usr/local/share/android-sdk
    • ANDROID_SDK_ROOT = /usr/local/share/android-sdk
    • Java binary at: /Applications/Android Studio.app/Contents/jre/Contents/Home/bin/java
    • Java version OpenJDK Runtime Environment (build 11.0.13+0-b1751.21-8125866)
    • All Android licenses accepted.

[✓] Android Studio (version 2021.3)
    • Android Studio at /Applications/Android Studio.app/Contents
    • Flutter plugin can be installed from:
      🔨 https://plugins.jetbrains.com/plugin/9212-flutter
    • Dart plugin can be installed from:
      🔨 https://plugins.jetbrains.com/plugin/6351-dart
    • Java version OpenJDK Runtime Environment (build 11.0.13+0-b1751.21-8125866)

Is this mismatch normal? Which version of Java is being used to build the Android app?

Thank you! I greatly appreciate your help.

Build id (optional)

67df504517ce867b00ca17f5

[sampaio96]

I solved it by adding this script right at the start of the workflow:

flutter config --jdk-dir $JAVA_HOME

This makes the Android toolchain use the version of Java on the path (JAVA_HOME) instead of the version from Android Studio.