首页 > 代码库 > 如何将 Cortana 与 Windows Phone 8.1 应用集成 ( Voice command - Natural language recognition )
如何将 Cortana 与 Windows Phone 8.1 应用集成 ( Voice command - Natural language recognition )
随着 Windows Phone 8.1 GDR1 + Cortana 中文版的发布，相信有很多用户或开发者都在调戏 Windows Phone 的语音私人助理 Cortana 吧，在世界杯的时候我亲测 Cortana 预测德国和阿根廷的比赛很准的。（题外话扯远了），可是作为开发者我们怎么将Cortana集成到应用中呢，今天我用一点时间给大家介绍一下如何使用 voice command 集成 Windows Phone 8.1 的应用。
首先要明确两个名词 Voice command & Voice Command Definition 即 VCD文件，相信做过windows Phone 8.0 开发的朋友应该有所了解，通过注册VCD文件 Windows phone 8.0 的应用当中就可以实现 voice command 的功能，如果你不了解请先读一下我之前的文章（这里我就不在过多介绍 8.0 Voice command 的重复内容了），Windows Phone 8 语音 - Speech for Windows Phone 8 快速了解一下Windows Phone 开发语音功能的前期准备工作。
简单的说在 Windows Phone 8.0 voice command 功能比较简单，主要是通过 Voice Command Name 判断预制在VCD文件中的几个命令。
在 Windows Phone 8.1 应用中 Cortana 提供了更强的自然语言识别（Natural language recognition）
当然 VCD 文件的中的 grammars 也得到了扩充，并且区别两个OS版本的
http://schemas.microsoft.com/voicecommands/1.0 for Windows Phone 8.0 Voice Command and Cortana compatible.
http://schemas.microsoft.com/voicecommands/1.1 only for Widnows Phone 8.1 Cortnan.
详细内容请参考
Windows Phone 8.0: Voice command element and attribute reference for Windows Phone 8
Windows Phone 8.1: Voice command elements and attributes
通过 8.0 和 8.1 VCD 文件属性支持情况来看有一个最主要的区别在8.1 VCD中支持 PhraseTopic 这个属性。
文字说的太抽象了还是贴出代码给大家说说吧：
这里我主要强调说一下 ListenFor 结点和 PhraseTopic 结点。 注意在 Listenfor 结点中的中括号 {dictatedSearchTerms} 是对应的 PhraseTopic 结点中的 Label 属性。同时我们可以把 PhraseTopic 理解成任意内容。最后都可以从Cortana回传到我们的应用当中来。
<VoiceCommands xmlns="http://schemas.microsoft.com/voicecommands/1.1"> <!-- The CommandSet Name is used to programmatically access the CommandSet --> <CommandSet xml:lang="zh-CN" Name="chineseCommands"> <!-- The CommandPrefix provides an alternative to your full app name for invocation --> <CommandPrefix> 微软 文档 </CommandPrefix> <!-- The CommandSet Example appears in the global help alongside your app name --> <Example> 搜索 构造 函数 </Example> <Command Name="MSDNSearch"> <!-- The Command example appears in the drill-down help page for your app --> <Example> 搜索 构造 函数‘ </Example> <!-- ListenFor elements provide ways to say the command, including references to {PhraseLists} and {PhraseTopics} as well as [optional] words --> <ListenFor> 查找 {dictatedSearchTerms} </ListenFor> <ListenFor> 搜 {dictatedSearchTerms} </ListenFor> <ListenFor> 搜索 {dictatedSearchTerms} </ListenFor> <ListenFor> 查 {dictatedSearchTerms} </ListenFor> <ListenFor> 找 {dictatedSearchTerms} </ListenFor> <!--Feedback provides the displayed and spoken text when your command is triggered --> <Feedback> 查找 MSDN... </Feedback> <!-- Navigate specifies the desired page or invocation destination for the Command--> <Navigate Target="MainPage.xaml" /> </Command> <Command Name="MSDNNaturalLanguage"> <Example> 我 想 去 Windows 手机 开发 中心 </Example> <ListenFor> {naturalLanguage} </ListenFor> <Feedback> 启动 MSDN... </Feedback> <Navigate Target="MainPage.xaml" /> </Command> <PhraseTopic Label="dictatedSearchTerms" Scenario="Search"> <Subject> MSDN </Subject> </PhraseTopic> <PhraseTopic Label="naturalLanguage" Scenario="Natural Language"> <Subject> MSDN </Subject> </PhraseTopic> </CommandSet></VoiceCommands>
了解完新的VCD文件，在这里我提醒下大家，其实在Windows Phone 8.0的应用中也可以兼容 Cortana的功能的，在8.0的应用当中我们只需要判断一下操作系统的版本然后选择不同的VCD文件向系统注册即可。
首先我们需要把两个版本的VCD文件都存放到项目中来
其次在注册VCD文件的时候根据系统版本进行一下判断即可。
/// <summary> /// Installs the Voice Command Definition (VCD) file associated with the application. /// Based on OS version, installs a separate document based on version 1.0 of the schema or version 1.1. /// </summary> private async void InstallVoiceCommands() { const string wp80vcdPath = "ms-appx:///VoiceCommandDefinition_8.0.xml"; const string wp81vcdPath = "ms-appx:///VoiceCommandDefinition_8.1.xml"; const string chineseWp80vcdPath = "ms-appx:///ChineseVoiceCommandDefinition_8.0.xml"; const string chineseWp81vcdPath = "ms-appx:///ChineseVoiceCommandDefinition_8.1.xml"; try { bool using81orAbove = ((Environment.OSVersion.Version.Major >= 8) && (Environment.OSVersion.Version.Minor >= 10)); string vcdPath = using81orAbove ? wp81vcdPath : wp80vcdPath; if (InstalledSpeechRecognizers.Default.Language.Equals("zh-CN", StringComparison.InvariantCultureIgnoreCase)) { vcdPath = using81orAbove ? chineseWp81vcdPath : chineseWp80vcdPath; } Uri vcdUri = new Uri(vcdPath); await VoiceCommandService.InstallCommandSetsFromFileAsync(vcdUri); } catch (Exception vcdEx) { Dispatcher.BeginInvoke(() => { MessageBox.Show(String.Format( AppResources.VoiceCommandInstallErrorTemplate, vcdEx.HResult, vcdEx.Message)); }); } }
最后在应用当中获取用户的语音输入方法，注意这里也是需要通过 PhraseTopic 结点的 Label 名称获取的。
/// <summary> /// Takes specific action for a retrieved VoiceCommand name. /// </summary> /// <param name="voiceCommandName"> the command name triggered to activate the application </param> private void HandleVoiceCommand(string voiceCommandName) { // Voice Commands can be typed into Cortana; when this happens, "voiceCommandMode" is populated with the // "textInput" value. In these cases, we‘ll want to behave a little differently by not speaking back. bool typedVoiceCommand = (NavigationContext.QueryString.ContainsKey("commandMode") && (NavigationContext.QueryString["commandMode"] == "text")); string phraseTopicContents = null; bool doSearch = false; switch (voiceCommandName) { case "MSDNNaturalLanguage": if (NavigationContext.QueryString.TryGetValue("naturalLanguage", out phraseTopicContents) && !String.IsNullOrEmpty(phraseTopicContents)) { // We‘ll try to process the input as a natural language query; if we‘re successful, we won‘t // fall back into searching, since the query will have already been handled. doSearch = TryHandleNlQuery(phraseTopicContents, typedVoiceCommand); } break; case "MSDNSearch": // The user explicitly asked to search, so we‘ll attempt to retrieve the query. NavigationContext.QueryString.TryGetValue("dictatedSearchTerms", out phraseTopicContents); doSearch = true; break; } if (doSearch) { HandleSearchQuery(phraseTopicContents, typedVoiceCommand); } }
整个过程就这么简单，心动不如行动，赶快把你的应用加入Cortana 功能让小伙伴儿们调戏一番。
更多参考资料：
Quickstart: Voice commands (XAML)
Speech for Windows Phone 8
快速入门：语音命令 (XAML)
源码下载：
MSDN Voice Search for Windows Phone 8.1