Directly interoperate with Android code

[Sitin]

What is the most effective way to interoperate with Android platform-specific code without Flutter?

Is there any bus, stream, IPC, or event queue I can use?

Context

I am working on an app that works with serial ports via USB. Unfortunately I haven't found a nice way to connect to serial ports on Android. Meanwhile, I know how to work with serial over USB using Java/Kotlin. I want all my logic reside in Rust and keep only a thin Android handler that handles USB devices, basic
I/O and passes everything to my Rust application.

[fzyzcjy]

Hi, maybe something like https://stackoverflow.com/questions/56821728/how-can-i-invoke-a-java-method-from-rust-via-jni, e.g. the j4rs package it mentions, may help.