Java Question how to build persian language date picker library

Mousa Najafi

Licensed User
I want to build a persian date picker library. I've found following solution :
As you see there are two java classes and xml file also android-numberpicker library should be attached.
I am new in java library making. The only library that I've made, was a single java date convertor class that
is done by SLC and it worked fine . but I don't know how to transform the above solution to B4A library.
Please tell me what steps I should do