basic for android

I have a APP in b4a with a list that i want to fill each time that a listener in my jar library is triggered, for this i want to call a function in my b4a code from the jar library, i tried too many ways but it didnt work, can you help me? (Sorry my english) The jar is the comunication module...

Hello you all I could not understand why Basic for Android is fast and does not consume device resources Unlike Android Studio, for example, it is slow in compiler and heavy, even though a company like Google is behind it Even by running the application on the phone, the Basic for Android...