A year later... FYI. Latest camera script fix.
After a fresh install (after uninstalling all ruboto including core and deleting jruby dir and contents) I still had the same error with the demo-camera.rb script.
I then fixed as per above (replacing the last line and editing the the same line with class CameraDemo,it worked but complained about class_name being depreciated.
The new correct last line syntax in demo-camera.rb should be replaced with the following line:
$irb.start_ruboto_activity CameraDemo, :theme => R.style::Theme_NoTitleBar_Fullscreen
No errors:)
Hope this helps someone.
Cheers,
Roy Obrecht