UWP通过DevCenter发送推送通知，点击通知对话框启动应用出现启动界面卡死的解决办法

发表于： 2017年7月30日 2017年8月2日
分类： UWP
标签： StoreServicesEngagementManager, 推送通知
3,532 views

先理解UWP应用程序完整生命周期需要经历如下状态：

1、应用程序第一次被开启，状态由 NotRunning 被激活（Activated）为 Running；
2、当用户点击 Start 按钮或者切换到其他应用，状态由 Running 暂停（Suspending）为Suspended；
3、当用户再次激活应用（如点击磁贴、任务切换、Toast 通知等），状态由 Suspended 恢复（Resuming）为 Running；
4、如果应用在 Suspended 状态下内存不足，系统会自动将应用程序终止（Terminate），状态由 Suspended变为 Not Running；
5、用户可以使用任务管理器强制关闭某个应用程序（CloseByUser），那么此时应用程序的状态也是由Suspended 变为 Not Running。
当应用处于关闭状态下，点击推送通知会触发激活应用，而此时应用如果已经关闭，所以停留在启动界面

解决办法：重写App类的OnActivated方法，首先判断启动类型如果是推送通知，再次执行一次启动OnLaunched中的方法

下面是完整的推送通知代码：

using Microsoft.Services.Store.Engagement;
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Runtime.InteropServices.WindowsRuntime;
using Windows.ApplicationModel;
using Windows.ApplicationModel.Activation;
using Windows.Foundation;
using Windows.Foundation.Collections;
using Windows.UI.Xaml;
using Windows.UI.Xaml.Controls;
using Windows.UI.Xaml.Controls.Primitives;
using Windows.UI.Xaml.Data;
using Windows.UI.Xaml.Input;
using Windows.UI.Xaml.Media;
using Windows.UI.Xaml.Navigation;

namespace App1
{
    /// <summary>
    /// Provides application-specific behavior to supplement the default Application class.
    /// </summary>
    sealed partial class App : Application
    {
        /// <summary>
        /// Initializes the singleton application object.  This is the first line of authored code
        /// executed, and as such is the logical equivalent of main() or WinMain().
        /// </summary>
        public App()
        {
            this.InitializeComponent();
            this.Suspending += OnSuspending;
            RegisterEngagementNotification();
        }
        private async void RegisterEngagementNotification()
        {

            StoreServicesEngagementManager engagementManager = StoreServicesEngagementManager.GetDefault();
            await engagementManager.UnregisterNotificationChannelAsync();
            await engagementManager.RegisterNotificationChannelAsync();
        }
        protected override void OnActivated(IActivatedEventArgs args)
        {
            base.OnActivated(args);
            if (args.Kind == ActivationKind.ToastNotification)
            {
                var toastArgs = args as ToastNotificationActivatedEventArgs;
                var arguments = toastArgs.Argument;

                if (arguments == "ARG")
                {
                    Frame rootFrame = Window.Current.Content as Frame;
                    if (rootFrame == null)
                    {
                        rootFrame = new Frame();
                        Window.Current.Content = rootFrame;
                    }
                    rootFrame.Navigate(typeof(MainPage));
                    Window.Current.Activate();
                }
            }
        }
        /// <summary>
        /// Invoked when the application is launched normally by the end user.  Other entry points
        /// will be used such as when the application is launched to open a specific file.
        /// </summary>
        /// <param name="e">Details about the launch request and process.</param>
        protected override void OnLaunched(LaunchActivatedEventArgs e)
        {
#if DEBUG
            if (System.Diagnostics.Debugger.IsAttached)
            {
                this.DebugSettings.EnableFrameRateCounter = true;
            }
#endif
            Frame rootFrame = Window.Current.Content as Frame;

            // Do not repeat app initialization when the Window already has content,
            // just ensure that the window is active
            if (rootFrame == null)
            {
                // Create a Frame to act as the navigation context and navigate to the first page
                rootFrame = new Frame();

                rootFrame.NavigationFailed += OnNavigationFailed;

                if (e.PreviousExecutionState == ApplicationExecutionState.Terminated)
                {
                    //TODO: Load state from previously suspended application
                }

                // Place the frame in the current Window
                Window.Current.Content = rootFrame;
            }

            if (e.PrelaunchActivated == false)
            {
                if (rootFrame.Content == null)
                {
                    // When the navigation stack isn't restored navigate to the first page,
                    // configuring the new page by passing required information as a navigation
                    // parameter
                    rootFrame.Navigate(typeof(MainPage), e.Arguments);
                }
                // Ensure the current window is active
                Window.Current.Activate();
            }
        }

        /// <summary>
        /// Invoked when Navigation to a certain page fails
        /// </summary>
        /// <param name="sender">The Frame which failed navigation</param>
        /// <param name="e">Details about the navigation failure</param>
        void OnNavigationFailed(object sender, NavigationFailedEventArgs e)
        {
            throw new Exception("Failed to load Page " + e.SourcePageType.FullName);
        }

        /// <summary>
        /// Invoked when application execution is being suspended.  Application state is saved
        /// without knowing whether the application will be terminated or resumed with the contents
        /// of memory still intact.
        /// </summary>
        /// <param name="sender">The source of the suspend request.</param>
        /// <param name="e">Details about the suspend request.</param>
        private void OnSuspending(object sender, SuspendingEventArgs e)
        {
            var deferral = e.SuspendingOperation.GetDeferral();
            //TODO: Save application state and stop any background activity
            deferral.Complete();
        }
    }
}

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using Microsoft.Services.Store.Engagement;

using System;

using System.Collections.Generic;

using System.IO;

using System.Linq;

using System.Runtime.InteropServices.WindowsRuntime;

using Windows.ApplicationModel;

using Windows.ApplicationModel.Activation;

using Windows.Foundation;

using Windows.Foundation.Collections;

using Windows.UI.Xaml;

using Windows.UI.Xaml.Controls;

using Windows.UI.Xaml.Controls.Primitives;

using Windows.UI.Xaml.Data;

using Windows.UI.Xaml.Input;

using Windows.UI.Xaml.Media;

using Windows.UI.Xaml.Navigation;

namespace App1

{

/// <summary>

/// Provides application-specific behavior to supplement the default Application class.

/// </summary>

sealed partial class App : Application

{

/// <summary>

/// Initializes the singleton application object. This is the first line of authored code

/// executed, and as such is the logical equivalent of main() or WinMain().

/// </summary>

public App()

{

this.InitializeComponent();

this.Suspending += OnSuspending;

RegisterEngagementNotification();

}

private async void RegisterEngagementNotification()

{

StoreServicesEngagementManager engagementManager = StoreServicesEngagementManager.GetDefault();

await engagementManager.UnregisterNotificationChannelAsync();

await engagementManager.RegisterNotificationChannelAsync();

}

protected override void OnActivated(IActivatedEventArgs args)

{

base.OnActivated(args);

if (args.Kind == ActivationKind.ToastNotification)

{

var toastArgs = args as ToastNotificationActivatedEventArgs;

var arguments = toastArgs.Argument;

if (arguments == "ARG")

{

Frame rootFrame = Window.Current.Content as Frame;

if (rootFrame == null)

{

rootFrame = new Frame();

Window.Current.Content = rootFrame;

}

rootFrame.Navigate(typeof(MainPage));

Window.Current.Activate();

}

/// <summary>

/// Invoked when the application is launched normally by the end user. Other entry points

/// will be used such as when the application is launched to open a specific file.

/// </summary>

/// <param name="e">Details about the launch request and process.</param>

protected override void OnLaunched(LaunchActivatedEventArgs e)

{

#if DEBUG

if (System.Diagnostics.Debugger.IsAttached)

{

this.DebugSettings.EnableFrameRateCounter = true;

}

#endif

Frame rootFrame = Window.Current.Content as Frame;

// Do not repeat app initialization when the Window already has content,

// just ensure that the window is active

if (rootFrame == null)

{

// Create a Frame to act as the navigation context and navigate to the first page

rootFrame = new Frame();

rootFrame.NavigationFailed += OnNavigationFailed;

if (e.PreviousExecutionState == ApplicationExecutionState.Terminated)

{

//TODO: Load state from previously suspended application

}

// Place the frame in the current Window

Window.Current.Content = rootFrame;

}

if (e.PrelaunchActivated == false)

{

if (rootFrame.Content == null)

{

// When the navigation stack isn't restored navigate to the first page,

// configuring the new page by passing required information as a navigation

// parameter

rootFrame.Navigate(typeof(MainPage), e.Arguments);

}

// Ensure the current window is active

Window.Current.Activate();

}

/// <summary>

/// Invoked when Navigation to a certain page fails

/// </summary>

/// <param name="sender">The Frame which failed navigation</param>

/// <param name="e">Details about the navigation failure</param>

void OnNavigationFailed(object sender, NavigationFailedEventArgs e)

{

throw new Exception("Failed to load Page " + e.SourcePageType.FullName);

}

/// <summary>

/// Invoked when application execution is being suspended. Application state is saved

/// without knowing whether the application will be terminated or resumed with the contents

/// of memory still intact.

/// </summary>

/// <param name="sender">The source of the suspend request.</param>

/// <param name="e">Details about the suspend request.</param>

private void OnSuspending(object sender, SuspendingEventArgs e)

{

var deferral = e.SuspendingOperation.GetDeferral();

//TODO: Save application state and stop any background activity

deferral.Complete();

}

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原创文章，转载请注明本文链接地址(违者必究):UWP通过DevCenter发送推送通知，点击通知对话框启动应用出现启动界面卡死的解决办法

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