JRuby9K_POC

Proof of concept for using JRuby 9K in a Ruboto project

This repository contains a sample Android Studio project using JRuby.

Emulator/phone Android version

The app currently works with emulators/devices running Android 8.1 (api 27) to Android 12L (api 32).

Version	API	Works
Android 14.0	34	no
Android 13.0	33	no
Android 12L	32	yes
Android 12.0	31	yes
Android 11.0	30	yes
Android 10.0	29	yes
Android 9.0	28	yes
Android 8.1	27	yes

Android 13.0 (api 33) is failing with new security restrictions:

https://issuetracker.google.com/issues/281448905?pli=1

Adding JRuby to an AndroidStudio project

Use the update_jruby_jar.sh script in the app folder:

cd app
./update_jruby_jar.sh

Adding gems

• Add your Gemfile in the app directory.
• Run the bundle Rake task using JRuby

jruby -S rake bundle

Updating Java sources

To update Java sources like Switchpoint, download sources from this link:

https://raw.githubusercontent.com/openjdk/jdk17/master/src/java.base/share/classes/java/lang/invoke/SwitchPoint.java

Library dependencies

• https://github.com/linkedin/dexmaker
• https://mvnrepository.com/artifact/com.jakewharton.android.repackaged/dalvik-dx
• https://mvnrepository.com/artifact/me.qmx.jitescript/jitescript