Android Retorfix2上传N张图片和json

@Multipart
@POST("xxxx/create")
suspend fun xxxxCreate(
    @Part("headImg") headImg: MultipartBody,
    @Part("valveImg") valveImg: MultipartBody,
    @Part("rubberImg") rubberImg: MultipartBody,
    @Part("rubberUnionImg") rubberUnionImg: MultipartBody,
    @Part("stoveFireTestImg") stoveFireTestImg: MultipartBody,
    @Part("signImg") signImg: MultipartBody,
    @Part("customerImg") customerImg: MultipartBody,
    @Part("otherImg") otherImg: MultipartBody,
    @Part("json") json: RequestBody,
): Result<String>

实现代码

val toRequestBody = jsonStr.toRequestBody("application/json".toMediaTypeOrNull())

lifecycleScope.launch {
val result = ApiClient.appApi.inspectRecordCreate(
    getMultipartBodyFiles(headImgList),
    getMultipartBodyFiles(valveImgList),
    getMultipartBodyFiles(rubberImgList),
    getMultipartBodyFiles(rubberUnionImgList),
    getMultipartBodyFiles(testFireImgList),
    getMultipartBodyFiles(signImgList),
    getMultipartBodyFiles(signUserImgList),
    getMultipartBodyFiles(fileListUser),
    toRequestBody
    )
}

private fun getMultipartBodyFiles(files: MutableList<File>): MultipartBody {
    val result = MultipartBody.Builder()
    for (file in files) {
        if (file.exists()) {
            result.addPart(
                MultipartBody.Part.createFormData(
                    "image/png",
                    file.name,
                    file.asRequestBody("multipart/form-data".toMediaTypeOrNull())
                )
            )
        }
    }
    return result.build()
}