Thank you for reading this question.

The problem we want to solve is to connect the android terminal and mbed by wired serial communication.

I want to send the processed string on the mbed side to the android terminal by wire, and display the received contents on the screen using my own application.

I understand up to serial communication using the charging port, but I don't know what code to use when developing an application.

You can use Java or kotlin for Android app development, but is there a library specialized for serial communication in those languages?

If i have any, it would be nice if you could provide us with sample code.
(English is fine)