Android中用Retrofit2发送Raw JSON请求至Payex服务器遇400错误

我尝试向Payex支付服务器发送POST请求，Postman中请求可正常运行，但Android端用Retrofit实现时出现retrofit2.HttpException: HTTP 400 Bad Request错误，推测问题出在Raw JSON数据的发送方式上。

ViewModel代码 #

// ViewModel

val mediaType: MediaType? = "application/json".toMediaTypeOrNull()
val body: RequestBody = RequestBody.create(
    mediaType,
    "  {\n        \"amount\": 1000,\n        \"currency\": \"MYR\",\n        \"collection_id\": \"\",\n        \"capture\": true,\n        \"customer_name\": \"Dholfaqar\",\n        \"email\": \"udalharazi@gmail.com\",\n        \"contact_number\": \"0172572068\",\n        \"address\": \"eco sky resident\",\n        \"postcode\": \"56473\",\n        \"city\": \"kuala lumpuer\",\n        \"state\": \"kuala lumpuer\",\n        \"country\": \"malaysia\",\n        \"shipping_name\": \"\",\n        \"shipping_email\": \"\",\n        \"shipping_contact_number\": \"\",\n        \"shipping_address\": \"\",\n        \"shipping_postcode\": \"\",\n        \"shipping_city\": \"\",\n        \"shipping_state\": \"\",\n        \"shipping_country\": \"\",\n        \"description\": \"testing\",\n        \"reference_number\": \"122674\",\n        \"payment_type\": \"card\",\n        \"show_payment_types\": false,\n        \"tokenize\": false,\n        \"card_on_file\": \"\",\n        \"return_url\": \"\",\n        \"callback_url\": \"\",\n        \"accept_url\": \"\",\n        \"reject_url\": \"\",\n        \"nonce\": \"\",\n        \"source\": \"androidapp\",\n        \"expiry_date\": \"2022-11-25\"\n    }\n"
)

Log.d("body info : ","info => "+body.toString())
GlobalScope.async(Dispatchers.IO) {
    try {

        val retrofit = ServiceBuilder.buildService(AppApis::class.java)
        retrofit.PaymentIntents("Bearer eyJhbGciOiJodHRwOi8vd3d3LnczLm9yZy8yMDAxLzA0L3htbGRzaWctbW9yZSNobWFjLXNoYTI1NiIsInR5cCI6IkpXVCJ9.eyJodHRwOi8vc2NoZW1hcy54bWxzb2FwLm9yZy93cy8yMDA1LzA1L2lkZW50aXR5L2NsYWltcy9uYW1lIjoiYWRyaWFuQG9wZW5rb20uaW8iLCJNZXJjaGFudElkIjoiMTE3MSIsIk1JRCI6IjEwMTc4MDEiLCJjdG9zIjoidHJ1ZSIsInBhcnRuZXJzIjoidHJ1ZSIsImV4cCI6MTY2OTk1NjA1OCwiaXNzIjoicGF5ZXguaW8iLCJhdWQiOiJwYXlleC5pbyJ9.SrhMtRA39OcprOeLXxyCOYk8c8r8jVAFPzrjiob0u9A",
            "application/json","application/json",body).enqueue(
            object : Callback<ResponseBody> {
                override fun onResponse(call: Call<ResponseBody>, response: Response<ResponseBody>) {

                    var res = response.body()?.string()
                    Log.d("response xxxxx 43","response => "+res.toString())
                    var resobj = JSONObject(res!!)

                }

                override fun onFailure(
                    call: Call<ResponseBody>,
                    t: Throwable
                ) {
                }

            })
    }catch (e: Exception) {
        Log.d("outletresponse","Exception => "+ e.toString())
    }
}

AppApis代码 #

// AppApis

// @FormUrlEncoded
@POST(AppConstants.Get_Payment_Intents)
suspend fun PaymentIntents(
    @Header("Authorization") Authorization: String,
    @Header("accept") accept: String,
    @Header("Content-Type") Content_Type: String,
    @Body bodyParameters:
    RequestBody,
): Call<ResponseBody>

我试过多种请求体数据类型，都无效：

• 使用PaymentRequest实体类赋值

val request = PaymentRequest()
request.amount =  amount.toString()
request.currency =  currency
request.collection_id =  collection_id
request.capture =  capture.toString()
request.customer_name =  customer_name
request.email =  email
request.contact_number =  contact_number
request.address =  address
request.postcode =  postcode
request.city =  city
request.state =  state
request.country =  country
request.shipping_name =  shipping_name
request.shipping_email =  shipping_email
request.shipping_contact_number =  shipping_contact_number
request.shipping_address =  shipping_address
request.shipping_postcode =  shipping_postcode
request.shipping_city =  shipping_city
request.shipping_state =  shipping_state
request.shipping_country =  shipping_country
request.description =  description
request.reference_number =  reference_number
request.payment_type =  payment_type
request.show_payment_types =  show_payment_types.toString()
request.tokenize =  tokenize.toString()
request.card_on_file =  card_on_file
request.return_url =  return_url
request.callback_url =  callback_url
request.accept_url =  accept_url
request.reject_url =  reject_url
request.nonce =  nonce
request.source =  source
request.expiry_date =  expiry_date 

• 使用HashMap

val params2: MutableMap<String, String> = HashMap()

• 使用JsonObject

val bodyParameters = JsonObject()

以下是Postman中可正常运行的Curl命令：

curl --location --request POST 'https://sandbox-payexapi.azurewebsites.net/api/v1/PaymentIntents' \
--header 'accept: application/json' \
--header 'Authorization: Bearer eyJhbGciOiJodHRwOi8vd3d3LnczLm9yZy8yMDAxLzA0L3htbGRzaWctbW9yZSNobWFjLXNoYTI1NiIsInR5cCI6IkpXVCJ9.eyJodHRwOi8vc2NoZW1hcy54bWxzb2FwLm9yZy93cy8yMDA1LzA1L2lkZW50aXR5L2NsYWltcy9uYW1lIjoiYWRyaWFuQG9wZW5rb20uaW8iLCJNZXJjaGFudElkIjoiMTE3MSIsIk1JRCI6IjEwMTc4MDEiLCJjdG9zIjoidHJ1ZSIsInBhcnRuZXJzIjoidHJ1ZSIsImV4cCI6MTY2OTk1NjA1OCwiaXNzIjoicGF5ZXguaW8iLCJhdWQiOiJwYXlleC5pbyJ9.SrhMtRA39OcprOeLXxyCOYk8c8r8jVAFPzrjiob0u9A' \
--header 'Content-Type: application/json' \
--header 'Cookie: ARRAffinity=6a0fcede443e754c9c62fee8eaa769c00469246725bdb526671819e1553ae727; ARRAffinitySameSite=6a0fcede443e754c9c62fee8eaa769c00469246725bdb526671819e1553ae727' \
--data-raw '[
    {
        "amount": 1000,
        "currency": "MYR",
        "collection_id": "",
        "capture": "true",
        "customer_name": "Dholfaqar",
        "email": "udalharazi@gmail.com",
        "contact_number": "0172572068",
        "address": "eco sky resident",
        "postcode": "56473",
        "city": "kuala lumpuer",
        "state": "kuala lumpuer",
        "country": "malaysia",
        "shipping_name": "",
        "shipping_email": "",
        "shipping_contact_number": "",
        "shipping_address": "",
        "shipping_postcode": "",
        "shipping_city": "",
        "shipping_state": "",
        "shipping_country": "",
        "description": "testing",
        "reference_number": "122674",
        "payment_type": "card",
        "show_payment_types": false,
        "tokenize": false,
        "card_on_file": "",
        "return_url": "",
        "callback_url": "",
        "accept_url": "",
        "reject_url": "",
        "nonce": "",
        "source": "androidapp",
        "expiry_date": "2022-11-25"
    }
]'

内容的提问来源于stack exchange，提问作者Dholfaqar Mohammed Alharazi