AutoML_APICall.kt

val requestBody = ModelRequestBody(PayloadRequest(ModelImage(imgString)))
Network("https://automl.googleapis.com/v1beta1/",true).getRetrofitClient().create(Endpoint::class.java).classifyImage(requestBody).enqueue(object : Callback<PayloadResult> {

      override fun onResponse(call: Call<PayloadResult>?, response: Response<PayloadResult>?) {
               if (response!!.isSuccessful) {
                  result_textview.text =  "${response?.body()?.items?.first()?.displayName} Score: ${(response?.body()?.items?.first()?.classification?.let { it.score * 100 })}"
               }
      }
      override fun onFailure(call: Call<PayloadResult>, t: Throwable) {
             print(t!!.message)
      }
})