data class Item(
    val calories: Int,
    val carbohydrates_total_g: Double,
    val cholesterol_mg: Int,
    val fat_saturated_g: Int,
    val fat_total_g: Double,
    val fiber_g: Double,
    val name: String,
    val potassium_mg: Int,
    val protein_g: Double,
    val serving_size_g: Int,
    val sodium_mg: Int,
    val sugar_g: Double
)

data class nutritionData(
    val items: List<Item>
)

val client = OkHttpClient.Builder()
.addInterceptor { chain ->
    val request = chain.request()
        .newBuilder()
        .addHeader("X-Api-Key", ApiHeaders.API_KEY)
        .build()
    chain.proceed(request)
}
.build()

interface NinjaAPI {

    @GET("v1/nutrition?")
    fun getNutrition(@Query("query") foodName: String): Call<List<nutritionData>>
}

    const val BASE_URL = "https://api.calorieninjas.com/"
fun getMyNutrition(foodName: String) {

    val retrofitBuilder = Retrofit.Builder()
        .addConverterFactory(GsonConverterFactory.create())
        .baseUrl(BASE_URL)
        .client(client)
        .build()
        .create(NinjaAPI::class.java)

    val retrofitData = retrofitBuilder.getNutrition(foodName)
    retrofitData.enqueue(object : Callback<List<nutritionData>?> {
        override fun onResponse(
            call: Call<List<nutritionData>?>,
            response: Response<List<nutritionData>?>
        ) {
            Log.d(TAG, "IT WORKED")
        }

        override fun onFailure(call: Call<List<nutritionData>?>, t: Throwable) {
            Log.d(TAG, "onFailure: " + t.message)
        }
    })
}

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我尝试了一切来显示（卡路里，脂肪，蛋白质和碳水化合物）从CaloriesNinja API，但我不能，我试图检查目录的信息，原来onRespons e从未发生过，所有的按钮点击转到onFailure并产生：
onFailure：应为开始_ARRAY，但在第1行第2列路径$处为BEGIN_OBJECT
我在谷歌上搜索了一下，这是我从API中格式化的数据，但我复制了他们的响应示例，并使用插件将其转换为Kotlin类。