问题
I'm trying to use an in-process background task to get notifications of a Bluetooth LE device. However, the following code hangs at the last line and does not return:
var bldr = new BackgroundTaskBuilder();
bldr.Name = guid.ToString("N");
var trigger = new GattCharacteristicNotificationTrigger(ch);
bldr.SetTrigger(trigger);
bldr.Register();
Getting the notifications of the device works when using the event-based model in the application. Also, registering the task with a TimeTrigger works, so the declaration in the app manifest is ok.
The computer runs the Creators Update, but the UWP is set to require the Anniversary update as a minimum.
回答1:
We've had the same issue with UWP app on windows 10 mobile. It was resolved after we had updated windows 10 mobile to build 10.0.15230.0.
回答2:
This hang on Register issue for GattCharacteristicNotificationTrigger was identified and fixed thanks to this question. The fix was released in build 15228 as a servicing build to the Creator's Update of the OS.
来源：https://stackoverflow.com/questions/43487748/background-task-registration-hangs-in-uwp-with-gattcharacteristicnotificationtri