除了access_token  其他参数需要以json字符串的格式传参: val JSON = MediaType.parse("application/json; charset=utf-8") val jsonString: String = "{\"width\":430,\"path\":\"pages/livie/liveRoom?liveId=$liveId\",\"scene\":\"pages\"}" val requestBody = RequestBody.create(JSON, jsonString)val request = Request.Builder() .url("https://api.weixin.qq.com/wxa/getwxacodeunlimit?access_token=$access_token") .post(requestBody) .build()