Java Question Need help wrapping SIP library

[Semendey]

Hello everyone.
I am trying to write a wrapper for the SIP library
I have already successfully wrapped the AJVoIP library, but only the functions I need.
But since this is a paid library, I cannot use it without restrictions, nor distribute it.

I found a free SIP project based on PJSIP and a couple of examples of its use

GitHub - VoiSmart/pjsip-android: SIP Service for Android based on PJSIP

SIP Service for Android based on PJSIP. Contribute to VoiSmart/pjsip-android development by creating an account on GitHub.

github.com

GitHub - fengfeilong0529/PjsipGo: A simple sip talk demo based on pjsip!

A simple sip talk demo based on pjsip! Contribute to fengfeilong0529/PjsipGo development by creating an account on GitHub.

github.com

GitHub - lahirutm/SIP-Dialer: SIP-Dialer for PJSIP sipservice

SIP-Dialer for PJSIP sipservice. Contribute to lahirutm/SIP-Dialer development by creating an account on GitHub.

github.com

Unfortunately, I couldn't compile any of the examples above to check their functionality.
Maybe someone else can do it.

As I understand it, there is currently no SIP solution for B4A, so perhaps this will become at least some kind of alternative

I started wrapping PJSIP.jar and everything seems to be assembled into a library for B4A, but when I launch it, nothing happens.
No SIP events are triggered

I am attaching the wrapper file, asking for any help and any tips.

I apologize, I am a big newbie in JAVA development and English is not my native language.