アプリが Android Auto または Android Automotive OS で実行されているかどうかを判断するには、CarConnection API を使用して、実行時に接続情報を取得します。次に例を示します。
自動車向けアプリの
Sessionで、CarConnectionを初期化し、LiveDataの更新を登録します。Kotlin
CarConnection(carContext).type.observe(this, ::onConnectionStateUpdated)Java
new CarConnection(getCarContext()).getType().observe(this, this::onConnectionStateUpdated);オブザーバーで、接続状態の変化に対応します。
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(); }