Question

我正在尝试构建可以播放音频文件的Alexa技能。我试图在启动请求中发送音频播放器播放指令，但是当我使用此代码时，我的Alexa没有回复。它看起来是否正确？

const LaunchRequestHandler = {
  canHandle(handlerInput) {
    return handlerInput.requestEnvelope.request.type === 'LaunchRequest';
  },
  handle(handlerInput) {
    console.log('IN LAUNCHREQUEST');
    return handlerInput.responseBuilder
        .addDirective({
            type: 'AudioPlayer.Play',
            playBehavior: 'REPLACE_ALL',
            audioItem: {
                stream: {
                    token: "0",
                    url: "myurlhere",
                    offsetInMilliseconds: 0
                }
            }
        })
    }
};

Answer 1

您必须在处理程序中返回“已构建”响应。因此，在您的情况下，代码将是：

const LaunchRequestHandler = {
  canHandle(handlerInput) {
    return handlerInput.requestEnvelope.request.type === 'LaunchRequest';
  },
  handle(handlerInput) {
    console.log('IN LAUNCHREQUEST');
    return handlerInput.responseBuilder
        .addDirective({
            type: 'AudioPlayer.Play',
            playBehavior: 'REPLACE_ALL',
            audioItem: {
                stream: {
                    token: "0",
                    url: "myurlhere",
                    offsetInMilliseconds: 0
                }
            }
        })
        .getResponse();
        // ^^^ add this line
    }
};

Answer 2

如果您正在使用alexa sdk v2（https://github.com/alexa/alexa-skills-kit-sdk-for-nodejs），则可以使用内置方法播放音频。可以使用以下方法播放长格式音频。

addAudioPlayerPlayDirective(playBehavior: interfaces.audioplayer.PlayBehavior, url: string, token: string, offsetInMilliseconds: number, expectedPreviousToken?: string, audioItemMetadata? : AudioItemMetadata): this;
addAudioPlayerStopDirective(): this;
addAudioPlayerClearQueueDirective(clearBehavior: interfaces.audioplayer.ClearBehavior): this;

更多信息，请访问https://ask-sdk-for-nodejs.readthedocs.io/en/latest/Building-Response.html

以下是我在lambda中用来播放音频的代码段。

//Create Image to be displayed with song

const metadata = {
    title: 'Stopwatch Audio',
    art: {
        sources: [{
            url: imageUrl
        }]
    }
};
handlerInput.responseBuilder.speak(speechText).addAudioPlayerPlayDirective("REPLACE_ALL", audiofile, audiofile, 0, null, metadata).withShouldEndSession(true).getResponse();

Alexa音频播放器指令

2 个答案: