Question

我有一个android程序正在读取的JSON feed：

[ { “ AddressLine1”：“公园路91号”， “ AddressLine2”：“萨顿科尔菲尔德”， “ AddressLine3”：“伯明翰”， “ Bio”：“通过将地道的口味和优质的服务辛勤耕combination，您一定会一次又一次地在亲朋好友中享受Asian Grill。”， “ CompanyDescription”：“印度餐厅”， “ CompanyID”：2 “ CompanyName”：“测试测试”， “ CoverFileExtension”：“ jpg”， “ CoverFileName”：“ cover_asiangrill”， “ Deliveroo”：null， “ Facebook”：“ 186939334708528”， “ Instagram”：null， “ JustEat”：null， “ LinkedIn”：null， “ LogoFileExtension”：“ png”， “ LogoFileName”：“ logo_asiangrill”， “ OpeningHours”：“ 17:00-23:00”， “邮政编码”：“ B73 XXX”， “电话”：“ 0121 354 xxx”， “ Twitter”：null， “ UberEats”：null， “不可用”：false， “网站”：null }， { “ AddressLine1”：“ Gracechurch购物中心”， “ AddressLine2”：“萨顿科尔菲尔德”， “ AddressLine3”：null， “生物”：“鲜榨果汁，新鲜水果冰沙，蛋白质冰沙和可丽饼！”， “ CompanyDescription”：“ Smoothie and Juice Bar”， “ CompanyID”：6 “ CompanyName”：“ Juiceys”， “ CoverFileExtension”：“ jpg”， “ CoverFileName”：“ cover_juiceys”， “ Deliveroo”：null， “ Facebook”：“ squeezeandgrinduk”， “ Instagram”：“ juiceysuk”， “ JustEat”：“ juiceys-sutton”， “ LinkedIn”：“”， “ LogoFileExtension”：“ jpg”， “ LogoFileName”：“ logo_test”， “ OpeningHours”：“ 09：00-17：30”， “邮政编码”：“ B72 XXX”， “电话”：“ 0121 355 XXX”， “ Twitter”：null， “ UberEats”：null， “不可用”：false， “网站”：null } ]

下面的我的kotlin代码很好地获取了json字符串：

fun fetchJson(){
        val url = Singleton.getUrlBase() + Singleton.getUrlPlacesBasic() + "400"
        val request = Request.Builder().url(url).build()
        val client = OkHttpClient()
        client.newCall(request).enqueue(object: Callback {
            override fun onResponse(call: Call, response: Response) {
                val body  = response?.body?.string()

                val gson = GsonBuilder().create()
                try {
                    val placesFeed = gson.fromJson(body, CompanyInfoBasicFeed::class.java)
                }
                catch(e: Exception){
                    val errString = e.toString()
                }
            }

            override fun onFailure(call: Call, e: IOException) {
                println("Failed to execute")
            }
        })
    }

但不幸的是我得到了错误： java.lang.IllegalStateException: Expected BEGIN_OBJECT but was BEGIN_ARRAY at line 1 column 2 path $

我的数据类如下：

//JsonObjects
class CompanyInfoBasicFeed(val companiesInfoBasic: List<CompanyInfoBasic>)

data class CompanyInfoBasic(val CompanyID: Int,val CompanyName: String?,val PostCode: String?,val
                            CompanyDescription: String?,val LogoFileName: String?,val CoverFileName: String?,val
                            LogoFileExtension: String?,val CoverFileExtension: String?,val
                            AddressLine1: String?,val AddressLine2: String?,val AddressLine3: String?,val Telephone: String?,
                            val Facebook : String?,val Twitter: String?,val Instagram: String?,val LinkedIn: String?,val JustEat: String?,val
                            Deliveroo: String?,val UberEats: String?,val Website: String?,val
                            Bio: String?,val OpeningHours : String?,val Unavailable: Boolean )

它认为我要解析的对象不是数组/列表吗？任何帮助表示赞赏。

Answer 1

CompanyInfoBasicFeed不是List。 CompanyInfoBasicFeed 包含一个List，但这需要具有companiesInfoBasic属性的外部JSON对象才能匹配您的构造函数属性。您的JSON对象没有这样的companiesInfoBasic属性。

您将需要让Gson解析List<CompanyInfoBasic>并摆脱CompanyInfoBasicFeed。或者，可能将CompanyInfoBasicFeed扩展为List<CompanyInfoBasic>。

当gson显然是数组时，为什么gson认为我的json feed是一个对象？

1 个答案: