windows phone 8.1 讓項目開啓藍牙genericAttributeProfile

1.打開項目裏面的  Package.appxmanifest 文件

   找到<Capabilities>節點，添加代碼以下，其中

serviceId:6006 能夠本身修改值

 <m2:DeviceCapability Name="bluetooth.genericAttributeProfile">
      <m2:Device Id="any">
        <m2:Function Type="serviceId:6006" />
      </m2:Device>
    </m2:DeviceCapability>
  </Capabilities>

2.藍牙核心代碼

 
        GattDeviceService gattDeviceService;
        GattCharacteristic characteristic;
        GattCharacteristic writeCharateristic;
        #region 藍牙管理
        public async Task<bool> Connect(string deviceName = "mydevice")
        {
            if (IsConnected) return true;

            bool result = false;
            if (gattDeviceService != null)
                gattDeviceService = null;

            try
            {

                var devices = await GetDevices();
                string s = "";
                foreach (var item in devices)
                {
                    s += item.Name + "   ,";
                }
                P(s);
                foreach (var item in devices)
                {
                    if (item.Name.ToLower().Contains(deviceName.ToLower()))
                    {
                        //已經配對 若是找不到提示用戶先去藍牙設置配對
                        gattDeviceService = await GattDeviceService.FromIdAsync(item.Id);
                        if (gattDeviceService != null)
                        {
                            var status = await Config();
                            if (status == GattCommunicationStatus.Success)
                                return true;
                            else
                            {
                                characteristic = null;
                                return false;
                            }
                        }
                        else
                        {
                            //提示用戶  沒法鏈接
                        }
                    }
                }
            }
            catch
            {

            }
            return result;
        }
        public bool IsBluetoothOpened
        {
            get
            {
                return isBlueBootoothOpend();
            }
        }
        internal bool IsConnected
        {
            get { return characteristic != null; }
        }

        /// <summary>
        /// 判斷藍牙是否打開
        /// </summary>
        /// <returns></returns>
        private bool isBlueBootoothOpend()
        {
            try
            {
                try
                {
                    PeerFinder.AlternateIdentities["Bluetooth:Paired"] = "";
                    var peers = PeerFinder.FindAllPeersAsync().AsTask().Result;
                    return true;
                }
                catch (Exception ex)
                {
                    if ((uint)ex.HResult == 0x8007048F || ex.HResult == -2146233088)
                    {
                        return false;
                    }
                    return true;
                }
            }
            catch
            {
                return false;
            }
        }


        internal async Task<DeviceInformationCollection> GetDevices()
        {
            var serverID = @"00008009-0000-1000-7000-00805f9b8875";  //Serive ID
            var zeCircleGUID = GattDeviceService.GetDeviceSelectorFromUuid(Guid.Parse(serverID));
            var devices = await Windows.Devices.Enumeration.DeviceInformation.FindAllAsync(zeCircleGUID);

            return devices;
        }
        private async Task<GattCommunicationStatus> Config()
        {
            GattCommunicationStatus status = GattCommunicationStatus.Unreachable;
            characteristic = null;
            characteristic = gattDeviceService.GetCharacteristics(Guid.Parse("00008002-0000-1000-8000-00805f9b34fb"))[0];
            writeCharateristic = gattDeviceService.GetCharacteristics(Guid.Parse("00008001-0000-1000-8000-00805f9b34fb"))[0];
            if (characteristic != null)
            {

                var currentDescriptorValue = await characteristic.ReadClientCharacteristicConfigurationDescriptorAsync();
                if (currentDescriptorValue.Status == GattCommunicationStatus.Success)
                {
                    status = await characteristic.WriteClientCharacteristicConfigurationDescriptorAsync(
                       GattClientCharacteristicConfigurationDescriptorValue.Notify);

                    if (status == GattCommunicationStatus.Success)
                        characteristic.ValueChanged += characteristic_ValueChanged;
                }
            }

            return status;
        }


        #endregion

3.藍牙數據接收部分

 public event EventHandler OnConnectionFailed;
        static UInt16 ReSendCount = 0;
        List<byte> receivedData = new List<byte>();
        private bool IsEnableReconnect = true;
        //數據處理
        public void characteristic_ValueChanged(GattCharacteristic sender, GattValueChangedEventArgs args)
        {
            byte[] data = new byte[args.CharacteristicValue.Length];
            DataReader.FromBuffer(args.CharacteristicValue).ReadBytes(data); //讀取數據
            receivedData.AddRange(data);
        }