访问通用Windows App(IoT)中的原始键盘输入 [英] Access raw keyboard input in Universal Windows App (IoT)

问题描述

我正在尝试构建一个应用程序，该应用程序将接受来自模拟键盘的遥控器的键盘输入.我需要从遥控器捕获所有键，包括提高/降低音量(它模拟多媒体键盘，fwiw).我不知道如何在UWA中做到这一点. 我已经尝试过Windows.UI.Input.KeyboardDeliveryInterceptor和Windows.UI.Core.CoreWindow.GetForCurrentThread().KeyDown，它们捕获一些输入，但不是所有键(它不捕获特殊键).

I'm trying to build an app that will accept keyboard input from a remote control that emulates a keyboard. I need to capture all keys from the remote, including volume up/down (it emulates a multimedia keyboard, fwiw). I can't figure out how to do that in a UWA. I've tried Windows.UI.Input.KeyboardDeliveryInterceptor and Windows.UI.Core.CoreWindow.GetForCurrentThread().KeyDown, which capture some input, but not all keys (it doesn't capture the special keys).

我不打算将此应用程序包含在App Store中，因此我可以分配所需的任何功能，包括受限功能.我试图直接访问HID设备，但事实证明键盘被阻止了().

I don't plan to include this app in the App Store so I can assign any capability that I need, including restricted. I tried to access the HID device directly, but it turns out keyboards are blocked ().

有什么想法吗?

推荐答案

简短答案

关键部分是在后面的代码中启用拦截器:

The key part is enabling the interceptor in the code behind:

deliveryInterceptor.IsInterceptionEnabledWhenInForeground = true; 

，并在应用清单中声明"inputForegroundObservation"功能:

and declaring the "inputForegroundObservation" capability in the app manifest:

<rescap:Capability Name="inputForegroundObservation" />

好答案

将此添加到Package.appxmanifest:

Add this to Package.appxmanifest:

命名空间对受限功能的引用:

Namespace reference to restricted capabilities:

xmlns:rescap="http://schemas.microsoft.com/appx/manifest/foundation/windows10/restrictedcapabilities"

添加为功能"标记的子代:

Add as child for Capabilities tag:

<rescap:Capability Name="inputForegroundObservation" />

然后将其添加到您的代码后面(例如MainPage.xaml.cs):

Then add this in your code behind (say MainPage.xaml.cs):

    public MainPage()
    {
        this.InitializeComponent();
        var _deliveryInterceptor = KeyboardDeliveryInterceptor.GetForCurrentView();
        UpdateTextBox($"Hash interceptor: {_deliveryInterceptor.GetHashCode()} \n");
        _deliveryInterceptor.IsInterceptionEnabledWhenInForeground = true;
        _deliveryInterceptor.KeyUp += _deliveryInterceptor_KeyEventReceived;
        _deliveryInterceptor.KeyDown += _deliveryInterceptor_KeyEventReceived;
    }

    private void _deliveryInterceptor_KeyEventReceived(KeyboardDeliveryInterceptor sender, Windows.UI.Core.KeyEventArgs 
    {
               //Process KeyUp/KeyDown
    }

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