Microsoft Band SDK Preview - 后台任务中的 NotificationManager

Question

嗨，我不确定我是否遗漏了什么，或者这是否不在 API 范围之内，在我看来这似乎是短视的。

SDK 可以在后台任务中向手环发送通知吗？这对我来说似乎是最有用的东西之一，但是当我尝试时出现错误。 'bandClient.NotificationManager.SendMessageAsync' 是它抛出异常的地方。后台任务为定时任务

后台代码简单，我在后台和UI线程上试了一下

尝试

            {

                // Get the list of Microsoft Bands paired to the phone.

                IBandInfo[] pairedBands = await BandClientManager.Instance.GetBandsAsync();

                if (pairedBands.Length < 1)

                {

                    deferral.Complete();

                }


                // Connect to Microsoft Band.

                using (IBandClient bandClient = await BandClientManager.Instance.ConnectAsync(pairedBands[0]))

               {


                    await bandClient.NotificationManager.SendMessageAsync(myTileId, "Earnings", currentDollars.ToString(), DateTimeOffset.Now, f);

                }

            }

            catch (Exception ex)

异常和堆栈跟踪：

ex = {System.Exception: Catastrophic failure (Exception from HRESULT: 0x8000FFFF (E_UNEXPECTED))

at Windows.UI.Xaml.Application.get_Current()

at Microsoft.Band.BandClientManager.d__2.MoveNext()

--- End of stack trace from previous location...

at Windows.UI.Xaml.Application.get_Current()

at Microsoft.Band.BandClientManager.d__2.MoveNext()

--- End of stack trace from previous location where exception was thrown ---

at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)

at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)

at System.Runtime.CompilerServices.TaskAwaiter`1.GetResult()

at WindowsRuntimeComponent1.AppTileUpdater.d__8.MoveNext()

Answer 1

是的，目的是您应该能够从后台任务连接到 Band 并对其进行操作。但是，Band SDK 预览版（1.3.10219-预览版）存在一个已知问题，该问题会阻止在后台任务中的代码运行中创建 IBandClient。

Answer 2

新版本中的后台任务（以及很多其他内容）已在今天停止预览。

Microsoft Band SDK Preview - 后台任务中的 NotificationManager

Microsoft Band SDK Preview - NotificationManager within a backgroundtask

c#

windows-runtime

windows-phone-8.1

microsoft-band