Unable to parse JSONObject in kotlin-CodePudding

I am unable to parse this JSONObject manually.

val client = OkHttpClient()
val mediaType = "application/x-www-form-urlencoded".toMediaTypeOrNull()
val body = RequestBody.create(mediaType, "query=${listItemName}")

val request = Request.Builder()
    .url("https://trackapi.nutritionix.com/v2/natural/nutrients")
    .method("POST", body)
    .build()


    val response = client.newCall(request).enqueue(object: Callback {
        override fun onFailure(call: Call, e: IOException) {
            println("Failed to execute request")
        }

        override fun onResponse(call: Call, response: Response) {
            val bodys = response.body?.string()
            println(bodys)

            val food = JSONObject(bodys)
            val foodName = food.getString("food_name")
          
        }



    })

The system.out shows the JSONObject string and there is a "food_name" but I keep getting the error below

2022-11-15 13:21:52.096 30501-30580/com.cpg12.findingfresh I/System.out: {"foods":[{"food_name":"crab","brand_name":null,"serving_qty":1,"serving_unit":"cup, flaked and pieces","serving_weight_grams":118,"nf_calories":97.94,"nf_total_fat":0.87,"nf_saturated_fat":0.24,"nf_cholesterol":114.46,"nf_sodium":466.1,"nf_total_carbohydrate":0,"nf_dietary_fiber":0,"nf_sugars":0,"nf_protein":21.1,"nf_potassium":305.62

2022-11-15 13:21:52.103 30501-30580/com.cpg12.findingfresh E/AndroidRuntime: FATAL EXCEPTION: OkHttp Dispatcher
    Process: com.cpg12.findingfresh, PID: 30501
    java.lang.Error: org.json.JSONException: No value for food_name
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1139)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:607)
        at java.lang.Thread.run(Thread.java:761)
     Caused by: org.json.JSONException: No value for food_name

The JSON response is here

val food = JSONObject(bodys).getJSONObject("foods")

This resulted in the error

java.lang.Error: org.json.JSONException: Value [{"food_name":"skittles","brand_name":null,"serving_qty":1,"serving_unit":"se ... at foods of type org.json.JSONArray cannot be converted to JSONObject

CodePudding user response：

Well you are trying to directly take out the value from array without loop it is not possible...

  val food = JSONObject(bodys) //here you are doing blunder

this should be

val food =JsonArray(bodys)

Full Code Snippet for your desire requirement

 val response = JSONObject(bodys)
 val Jarray: JSONArray = response.getJSONArray("foods")
 for (i in 0 until Jarray.length()) {
        val jsonobject: JSONObject = jsonarray.getJSONObject(i)
        val food_name= jsonobject.getString("food_name")
       
    }

I hope this will help you!! Thanks me later!!