สร้าง CarAppService และเซสชันของคุณ

class HelloWorldService : CarAppService() {
  ...
  override fun onCreateSession(): Session {
      return HelloWorldSession()
  }
  ...
}

public final class HelloWorldService extends CarAppService {
  ...
  @Override
  @NonNull
  public Session onCreateSession() {
      return new HelloWorldSession();
  }
  ...
}

class HelloWorldSession : Session() {
  ...
  override fun onCreateScreen(intent: Intent): Screen {
      return HelloWorldScreen(carContext)
  }
  ...
}

public final class HelloWorldSession extends Session {
  ...
  @Override
  @NonNull
  public Screen onCreateScreen(@NonNull Intent intent) {
      return new HelloWorldScreen(getCarContext());
  }
  ...
}