How to realize the automatic reply function of the client?

I want to automatically reply the result of command execution when user A receives user B’s command.How to do this with Java on Android?

Hi @ulnit welcome :wave:

command execution when user A receives user B’s command.How to do this with Java on Android?

What is a command execution in your use case? Can you provide more details of what feature of the client you’ve set up and what you want to achieve?