How can I connect between android client and rasa server, using REST API

I want to build a simple android mobile app, that will communicate through REST API with a rasa server -

So the android client will run on my Samsung Galaxy J7 Prime phone (using USB connection through an android-studio script which runs on my computer), and the rasa server will run on my computer.

you will have to create the bot server and can use ngrok for instance. You will have to place a POST request to the bot server in your app code for handling input / output channels