android - org.json.simple.JSONObject cannot be converted to JSONObject

I get an error when I try to get a JSON object from server
after get all objects and put into JSON
array:

JSONObject object =
            null;
try {
 object = jsonArray.getJSONObject(i);
} catch
            (JSONException e) {

            e.printStackTrace();
}

This
code returns:

W/System.err:
            **org.json.JSONException**: 
Value
            {"keywords":"","autor":"","resposta_complete":"Incomplete","revisor2":"","referencias":"","revisor3":"","revisor1":"","setor_pergunta":"","pergunta_anterior":"","resposta_curta":"","resposta_longa":"","record_id":"178","data_resposta":"2016-10-17","imagem":"","class_pergunta":"Nao
            se trata de uma pergunta, ou ela esta
            ininteligivel.","revisor_externo":"","pergunta_revisada":""} 
at 167 of type
            org.json.simple.JSONObject cannot be converted to JSONObject
10-17
            17:32:34.660 15402-15453/ft.projetorisadinha W/System.err: at
            org.json.JSON.typeMismatch(JSON.java:100)
10-17 17:32:34.660
            15402-15453/ft.projetorisadinha W/System.err: at
            org.json.JSONArray.getJSONObject(JSONArray.java:484)
10-17 17:32:34.660
            15402-15453/ft.projetorisadinha W/System.err: at
            ft.projetorisadinha.classes.LoadData$Load.populate(LoadData.java:206)
10-17
            17:32:34.660 15402-15453/ft.projetorisadinha W/System.err: at
            ft.projetorisadinha.classes.LoadData$Load.doInBackground(LoadData.java:138)
10-17
            17:32:34.660 15402-15453/ft.projetorisadinha W/System.err: at
            ft.projetorisadinha.classes.LoadData$Load.doInBackground(LoadData.java:63)

10-17
            17:32:34.660 15402-15453/ft.projetorisadinha W/System.err: at
            android.os.AsyncTask$2.call(AsyncTask.java:287)
10-17 17:32:34.660
            15402-15453/ft.projetorisadinha W/System.err: at
            java.util.concurrent.FutureTask.run(FutureTask.java:234)
10-17 17:32:34.660
            15402-15453/ft.projetorisadinha W/System.err: at
            android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:230)
10-17
            17:32:34.660 15402-15453/ft.projetorisadinha W/System.err: at
            java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1080)
10-17
            17:32:34.660 15402-15453/ft.projetorisadinha W/System.err: at
            java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:573)
10-17
            17:32:34.660 15402-15453/ft.projetorisadinha W/System.err: at
            java.lang.Thread.run(Thread.java:856)
10-17 17:32:34.660
            15402-15453/ft.projetorisadinha W/System.err:
            java.lang.NullPointerException
10-17 17:32:34.660
            15402-15453/ft.projetorisadinha W/System.err: at
            ft.projetorisadinha.classes.LoadData$Load.populate(LoadData.java:210)
10-17
            17:32:34.660 15402-15453/ft.projetorisadinha W/System.err: at
            ft.projetorisadinha.classes.LoadData$Load.doInBackground(LoadData.java:138)
10-17
            17:32:34.660 15402-15453/ft.projetorisadinha W/System.err: at
            ft.projetorisadinha.classes.LoadData$Load.doInBackground(LoadData.java:63)

10-17
            17:32:34.660 15402-15453/ft.projetorisadinha W/System.err: at
            android.os.AsyncTask$2.call(AsyncTask.java:287)
10-17 17:32:34.660
            15402-15453/ft.projetorisadinha W/System.err: at
            java.util.concurrent.FutureTask.run(FutureTask.java:234)
10-17 17:32:34.660
            15402-15453/ft.projetorisadinha W/System.err: at
            android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:230)
10-17
            17:32:34.660 15402-15453/ft.projetorisadinha W/System.err: at
            java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1080)
10-17
            17:32:34.660 15402-15453/ft.projetorisadinha W/System.err: at
            java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:573)
10-17
            17:32:34.660 15402-15453/ft.projetorisadinha W/System.err: at
            java.lang.Thread.run(Thread.java:856)

When
I run that in API 23, everything is ok. Is it an issue from API support? How can I solve
that?

UPDATE

Inside
my activity:

private
            org.json.simple.JSONArray array_obj =
            null;

Inside my code,
here is where I parse JSON:

if
            (reader == null)

 reader = new BufferedReader(new
            InputStreamReader(response.body().byteStream()));

while ((line =
            reader.readLine()) != null) {
 JSONParser parser_obj = new
            JSONParser();
 if (array_obj == null) {
 array_obj =
            (org.json.simple.JSONArray) parser_obj.parse(line);
 jsonArray = new
            JSONArray(array_obj);

            }
}

and
here is my JSON imports:

import
            org.json.JSONArray;
import org.json.JSONException;
import
            org.json.JSONObject;
import
            org.json.simple.parser.JSONParser;