如何实现自动滚动的Alexa APL语音/文本同步？

问题描述

当显示文本较大时，我正在尝试为Alexa Echo节目实现自动滚动功能。我正在将Alexa ASK SDK用于Node.js. 我正在关注此文档：https://developer.amazon.com/en-US/docs/alexa/alexa-presentation-language/apl-speech-and-text-synchronization-for-text-blocks.html

这是我的代码，

伪代码：APL_document.json

"items": [
{
    "type": "Container","height": "100vh","width": "100vw","items": [
        {
            "type": "ScrollView","height": "100%","width": "100%","item": {
                    "type": "Text","id": "catFactText","text": "${catFactData.properties.catFact}","speech": "${catFactData.properties.catFactSpeech}"
                }
        }
    ]
}

]

data.json

{
 "datasources": {
  "catFactData": {
   "type": "object","properties": {
    "backgroundImage": "https://.../catfacts.png","title": "Cat Fact #9","logoUrl": "https://.../logo.png","image": "https://.../catfact9.png","catFactSsml": "<speak>Not all cats like <emphasis level='strong'>catnip</emphasis>.</speak>"
   },"transformers": [{
     "inputPath": "catFactSsml","outputName": "catFactSpeech","transformer": "ssmlToSpeech"
    },{
     "inputPath": "catFactSsml","outputName": "catFact","transformer": "ssmlToText"
    }
   ]
  }
 }
}

意图处理程序：

handle(handlerInput) {
        return handlerInput.responseBuilder
            .addDirective({
                type : 'Alexa.Presentation.APL.RenderDocument',token :'documentToken',document : require('./templates/APL_document.json'),datasources: require('./data/data.json')
            })
            .addDirective({
              type : 'Alexa.Presentation.APL.ExecuteCommands',token: 'documentToken',commands: [
                    {
                     "type": "SpeakList","componentId": "catFactText"
                     }
                    ]
                    
                    }) 
            .getResponse();
        

    }

现在的问题是Alexa Echo Show没有响应，什么也没看到。我这是怎么了？

解决方法

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