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我正在使用 GeoFence API 编写 Windows Phone 8.1 应用程序。我的问题是我无法在后台任务中触发位置更改,因为应用程序以代码 1 退出。
我已阅读有关此错误的多个主题,但没有解决方案解决我的问题。
事实上,甚至在从 BackgroundTask 运行 Run 函数之前就会出现错误。
namespace BackgroundTask
{
public sealed class geoFenceBackgroundTask : IBackgroundTask
{
public void Run(IBackgroundTaskInstance taskInstance)
{
ToastTemplateType toastTemplate = ToastTemplateType.ToastText02;
XmlDocument toastXml = ToastNotificationManager.GetTemplateContent(toastTemplate);
XmlNodeList toastTextElements = toastXml.GetElementsByTagName("text");
toastTextElements[0].AppendChild(toastXml.CreateTextNode("MY APP"));
toastTextElements[1].AppendChild(toastXml.CreateTextNode("Test"));
//IXmlNode toastNode = toastXml.SelectSingleNode("/toast");
//XmlElement audio = toastXml.CreateElement("audio");
ToastNotification toast = new ToastNotification(toastXml);
ToastNotificationManager.CreateToastNotifier().Show(toast);
}
}
}
还有我的注册函数:
async private void RegisterBackgroundTask()
{
// Get permission for a background task from the user. If the user has already answered once,
// this does nothing and the user must manually update their preference via PC Settings.
BackgroundAccessStatus backgroundAccessStatus = await BackgroundExecutionManager.RequestAccessAsync();
// Regardless of the answer, register the background task. If the user later adds this application
// to the lock screen, the background task will be ready to run.
// Create a new background task builder
BackgroundTaskBuilder geofenceTaskBuilder = new BackgroundTaskBuilder();
geofenceTaskBuilder.Name = "geoFenceBackgroundTask";
geofenceTaskBuilder.TaskEntryPoint = "BackgroundTask.geoFenceBackgroundTask";
// Create a new location trigger
var trigger = new LocationTrigger(LocationTriggerType.Geofence);
// Associate the locationi trigger with the background task builder
geofenceTaskBuilder.SetTrigger(trigger);
// If it is important that there is user presence and/or
// internet connection when OnCompleted is called
// the following could be called before calling Register()
// SystemCondition condition = new SystemCondition(SystemConditionType.UserPresent | SystemConditionType.InternetAvailable);
// geofenceTaskBuilder.AddCondition(condition);
// Register the background task
var geofenceTask = geofenceTaskBuilder.Register();
geofenceTask.Completed += (sender, args) =>
{
// MY CODE HERE
};
geofenceTask = geofenceTaskBuilder.Register();
}
我没有别的想法。有帮助吗?
最佳答案
只是偶然发现了一个类似的问题(当我通过“Lifecyle-Events-Dropdown”启动后台任务时,Visual Studio 停止了调试,并在控制台输出中声明“BACKGROUNDTASKHOST.EXE 已退出,代码为 1 (0x1)” -窗口。
在 WP8 项目中添加对我的 Tasks-Assembly (winmd) 项目的缺失引用解决了这个问题。
关于c# - BACKGROUNDTASKHOST.EXE' 已退出,代码为 1 (0x1) - 地理围栏问题,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/25942340/
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