연결 API

앱이 Android Auto에서 실행 중인지 Android Automotive OS에서 실행 중인지 확인하려면 CarConnection API를 사용하여 런타임에 연결 정보를 가져옵니다. 예를 들면 다음과 같습니다.

1. 자동차 앱의 Session에서 CarConnection를 초기화하고 LiveData 업데이트를 구독합니다.

   Kotlin

   CarConnection(carContext).type.observe(this, ::onConnectionStateUpdated)
   

   자바

   new CarConnection(getCarContext()).getType().observe(this, this::onConnectionStateUpdated);
   

2. 관찰자에서 연결 상태의 변경에 반응합니다.

   Kotlin

   fun onConnectionStateUpdated(connectionState: Int) {
     val message = when(connectionState) {
       CarConnection.CONNECTION_TYPE_NOT_CONNECTED -> "Not connected to a head unit"
       CarConnection.CONNECTION_TYPE_NATIVE -> "Connected to Android Automotive OS"
       CarConnection.CONNECTION_TYPE_PROJECTION -> "Connected to Android Auto"
       else -> "Unknown car connection type"
     }
     CarToast.makeText(carContext, message, CarToast.LENGTH_SHORT).show()
   }
   

   Java

   private void onConnectionStateUpdated(int connectionState) {
     String message;
     switch(connectionState) {
       case CarConnection.CONNECTION_TYPE_NOT_CONNECTED:
         message = "Not connected to a head unit";
         break;
       case CarConnection.CONNECTION_TYPE_NATIVE:
         message = "Connected to Android Automotive OS";
         break;
       case CarConnection.CONNECTION_TYPE_PROJECTION:
         message = "Connected to Android Auto";
         break;
       default:
         message = "Unknown car connection type";
         break;
     }
     CarToast.makeText(getCarContext(), message, CarToast.LENGTH_SHORT).show();
   }