（Windows Phone 10）处理应用程序状态

Question

我正在开发windows phone 10中的应用程序

出于某种原因，我必须处理应用程序状态（转到后台，输入前台）。我在App.xaml.cs处理事件暂停和恢复，但它不起作用，未达到OnSuspending和OnResuming。请帮我查看我的源代码并告诉我如何处理这些事件。

这是我的代码：

public App()
    {
        Microsoft.ApplicationInsights.WindowsAppInitializer.InitializeAsync(
            Microsoft.ApplicationInsights.WindowsCollectors.Metadata |
            Microsoft.ApplicationInsights.WindowsCollectors.Session);
        this.InitializeComponent();
        this.Suspending += OnSuspending;
        Application.Current.Suspending += new SuspendingEventHandler(OnSuspending);
        Application.Current.Resuming += new EventHandler<Object>(OnResuming);

    }

    private void OnSuspending(Object sender, Windows.ApplicationModel.SuspendingEventArgs e)
    {
        var deferral = e.SuspendingOperation.GetDeferral();
        //TODO: Save application state and stop any background activity
        deferral.Complete();


    }
    private void OnResuming(object sender, object e)
    {
        // do some thing
    }