Android Question Making an application compatible with Android Auto

Are you talking about this: https://developer.android.com/training/auto/start/index.html ?

Should be simple to implement with the manifest editor.

Yes. I've built an application to control a ham radio station remotely and I want to make it available in Android Auto. I have to define a new GUI, including menus, but I don't know how.

There are two types of auto apps: https://developer.android.com/training/auto/start/index.html#build-it

I don't think that you can create an auto app that control a ham radio.

I want to create a standard Audio Playback application controlled by the wheel in the car and to display the frequency instead of song name, All other parameters will be configured through the dropdown menu in the left. I don't know hot to send Artist Name and Song Name and how to create the dropdown menu.

Tune-In is available as an Android Auto application and mine do something similar, just the audio source is different and the way you select the audio stream parameters.

It will not work without a custom library.