Permanent Sidebar and changing App screensize

[kurtisane]

Hi guys,
I'm quite new to Android programming. I've been programming a lot in Java and more in Kotlin.

I just got a Android Head Unit in my car and I want to try to get some actions triggered in my car coming from the head unit.

Therefore I thought to have a systemwide permanent Sidebar with buttons on it. How I'm going to use that button tap event to then trigger something in my car is not worked out yet but time will tell.

My main question is how am I going to get a sidebar that is permanent and reduces the screen area for the other apps?

Basically the same thing that the navigationbar does on android phones. The navigation bar takes up space that could be used for the app.

Regards and thank you for your time and effort.

 

[Deleted User]

My main question is how am I going to get a sidebar that is permanent and reduces the screen area for the other apps?

I think your question is about customising the launcher. There may already be a launcher that does what you want, but it's possible to create your own launcher app.