public void Initialize() { ListDevices = new ObservableCollection <BTDevice>(); IBluetoothManager btMan = DependencyService.Get <IBluetoothManager>(); var listBTDevices = btMan.GetBondedDevices(); if (listBTDevices != null && listBTDevices.Count > 0) { foreach (var device in listBTDevices) { Device = new BTDevice { Name = device.Name, UUID = device.UUID, Address = device.Address }; ListDevices.Add(Device); } } else { lbl1 = "Bluetoothデバイスがありません。"; } }