Developing Apps without the Car UI Library

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The Car UI Library (car-ui-library) is a self-consistent automotive UI library that can be customized by OEMs. Google strongly recommends you use the car-ui-library to create your app. If this isn't feasible, there are two alternatives:

  • From Android 12, you can use car-rotary-lib, a subset of car-ui-library.
  • On Android 11, you MUST implement your own FocusParkingView, FocusArea, and DirectManipulationHelper as described below.

Implement FocusParkingView

You either can implement your own FocusParkingView or copy the class from the car-ui-library to your project.

To implement FocusParkingView:

  1. Hard code the accessibility class name so that the RotaryService can recognize it:
    @Override
    public CharSequence getAccessibilityClassName() {
          return "com.android.car.ui.FocusParkingView";
    }
    

Implement FocusArea

Like FocusParkingView, you can either implement your own FocusArea or copy the class from the car-ui-library to your project.

To implement FocusArea:

  1. Hard code the accessibility class name so that rotary service can recognize it:
    @Override
    public CharSequence getAccessibilityClassName() {
       return "com.android.car.ui.FocusArea";
    }
    

Implement DirectManipulationHelper

This is a utility class. You can copy the class from the car-ui-library to your project.