I am implementing tabs using TabTemplate but facing issue in refreshing the UI once the tab is clicked. On tab click new screen is loaded where each screen has api call, once api is success I need to refresh the screen. How can we achieve this ?

I will start this question with a little bit of context

The car system is Android 8.1 and the music software has been installed, but the music software keeps loading when clicked to play and there is no sound from the car. How to solve this problem?

I need to customize the Default CarLauncher in Android Automotive OS.
How can I replace the Default CarLauncher ? How to change the layout and applications displayed on it?
Here is my carLauncher
My Default CarLauncher