我正在尝试用新闻卡回复用户，但据我所知，如果我按照你的例子它不起作用 . 如果我只是回复这样的履行消息
res.json({
"fulfillmentMessages": [
{
"card": {
"title": "card title",
"subtitle": "card text",
"imageUri": "https://assistant.google.com/static/images/molecule/Molecule-Formation-stop.png",
"buttons": [
{
"text": "button text",
"postback": "https://assistant.google.com/"
}
]
}
}
],
"source": "example.com"
});
我收到此错误：
{
"responseMetadata": {
"status": {
"code": 13,
"message": "Failed to parse Dialogflow response into AppResponse because of empty speech response",
"details": [
{
"@type": "type.googleapis.com/google.protobuf.Value",
"value": "{\"id\":\"ef8154ae-96ff-4837-b7e7-d3388223240d\",\"timestamp\":\"2018-04-27T15:19:19.449Z\",\"lang\":\"en-us\",\"result\":{},\"status\":{\"code\":200,\"errorType\":\"success\"},\"sessionId\":\"1524841118917\"}"
}
]
}
}
}
如果我添加fulfillmentText（应该是可选的），Google智能助理将仅使用纯文本作为回复，并且不会使用卡片 .
有人解决了这个问题吗？