[Bug]: Freshly created Ionic Vue project cannot be run on Android

[Albermonte]

Capacitor Version

💊   Capacitor Doctor  💊 

Latest Dependencies:

  @capacitor/cli: 7.0.1
  @capacitor/core: 7.0.1
  @capacitor/android: 7.0.1
  @capacitor/ios: 7.0.1

Installed Dependencies:

  @capacitor/ios: not installed
  @capacitor/cli: 7.0.1
  @capacitor/core: 7.0.1
  @capacitor/android: 7.0.1

[success] Android looking great! 👌

Other API Details

npm --version
10.9.0



node --version
v22.11.0


macOS Sequoia 15.2

Platforms Affected

• iOS
• Android
• Web

Current Behavior

Cannot run the android build, this error shows in console:

        [Incubating] Problems report is available at:
        file:///Users/albermonte/proyectos/ionic-demo/android/build/reports/problems/problems-report.html
        
        FAILURE: Build failed with an exception.
        
        * What went wrong:
        Execution failed for task ':capacitor-android:compileDebugJavaWithJavac'.
        > error: invalid source release: 21

Expected Behavior

It only runs on iOS but not on Android

Project Reproduction

https://github.com/Albermonte/capacitor-v7-error

Additional Information

No response

[jcesarmobile]

Are you using Android Studio Ladybug?
It's required for Capacitor 7

[Albermonte]

Android Studio Ladybug Feature Drop | 2024.2.2
Build #AI-242.23726.103.2422.12816248, built on December 18, 2024
Runtime version: 21.0.4+-12422083-b607.1 aarch64
VM: OpenJDK 64-Bit Server VM by JetBrains s.r.o.
Toolkit: sun.lwawt.macosx.LWCToolkit
macOS 15.3
GC: G1 Young Generation, G1 Concurrent GC, G1 Old Generation
Memory: 2048M
Cores: 12
Metal Rendering is ON
Registry:
  ide.experimental.ui=true
  i18n.locale=

[Albermonte]

Btw, in Capactior docs there's a typo mentioning "Capacitor 6" instead of 7

[jcesarmobile]

Your sample app is working fine for me.
Are you running with Android Studio or with npx cap run android?

[Albermonte]

Just tried running with Android Studio and it worked after "Gradle Sync" and "Clean Project", but still not working when running using npx cap run android

[jcesarmobile]

Capacitor 7 requires JDK 21, Android Studio Ladybug is distributed with JDK 21 included, so it works out of the box, but for npx cap run android you'll have to set your JAVA_HOME to use JDK 21 or newer (but not 24 as that's still not supported by gradle).

What I do is to configure JAVA_HOME to point to the JDK shipped with Android Studio with this value /Applications/Android Studio.app/Contents/jbr/Contents/Home

[Albermonte]

Thank you @jcesarmobile, that did the trick. I would suggest to include that in the docs or in the Upgrade Guide for users like me that used Capacitor 6 or older

[jcesarmobile]

It's mentioned already on the upgrade Android Studio step
https://capacitorjs.com/docs/updating/7-0#upgrade-android-studio