USB communication Arduino Pro Micro / Leonardo and Android

Hey,

does someone have experiences with connecting an Arduino Pro Micro or Leonardo to an Android phone over USB ?

Found this https://github.com/mik3y/usb-serial-for-android https://groups.google.com/forum/#!topic/usb-serial-for-android/8-fLuUn2Yns

and this https://github.com/inventit/processing-android-serial.

But I have no idea how I would use the AndroidLib in Processing(AndroidMode) and the second method simply doesnt work for me.

thanks, cheers !