Buildozer: Android Gradle requires Java 17. I installed Java 22, but where?

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Henrik R.

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Jul 11, 2024, 3:09:02 PM (5 days ago) Jul 11

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I had to delete the .buildozer folder (using 'buildozer appclean'), because I had added a new module to 'requirements' in buildozer.spec. Now I get this error:

"Android Gradle plugin requires Java 17 to run. You are currently using Java 11."

I use Ubuntu 20.04.06 LTS, so I installed OpenJDK ver. 22.0.1 using 'Software'. But how do I direct Gradle to use it?

A thorough search shows that 'openjdk' folders from today can be found here:

NOTE that I have asked the same question here:

https://askubuntu.com/questions/1520250/i-installed-openjdk-22-on-ubuntu-with-software-but-where

But noone has answered it.

Henrik R.

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Jul 12, 2024, 5:55:38 AM (5 days ago) Jul 12

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I have - at least partly - solved this. :-)

On https://github.com/Android-for-Python/Android-for-Python-Users#unsupported-class-file-major-version-62 I read:

"The Java version used by p4a is the version required for the gradle version used. This can be any version between openJDK-11 and 17, the install instructions suggest 17."

Then I did this Java install:

sudo apt install openjdk-17-jdk

(Inspired by this: https://github.com/kivy/buildozer/blob/master/docs/source/installation.rst#android-on-ubuntu-2004-and-2204-64bit