No se puede devolver el objeto JSON, dentro del objeto en la aplicación de Android

Así que tengo una aplicación de Android en la que estoy trabajando que realiza una llamada API al servidor y devuelve información JSON. Ahora en mi aplicación de Android puedo analizar el JSON, pero solo hasta la primera matriz. Después de eso dice que esa categoría no existe.

Aquí está el diseño de respuesta JSON:

    [
  {
    "success": 0,
    "error": "string",
    "response": {
      "lastseen": 0,
      "mapstats": {
        "maps": [
          {
            "tier": 0,
            "modeid": 0,
            "modename": "string",
            "modecolor": "string",
            "bonus": 0,
            "name": "string",
            "rank": 0,
            "time": "string",
            "num_completed": 0
          }
        ],
        "highest_tier": 0,
        "num_beaten": 0,
        "percent_completion": 0
      },
      "tag_color": "string",
      "name": "string",
      "rank": 0,
      "avatar": "string",
      "tag": "string",
      "playtime": 0,
      "percent": 0
    }
  }
]

Y aquí está mi clase de Java:

package com.horizonservers.horizon;

import android.app.ProgressDialog;
import android.content.Context;
import android.content.Intent;
import android.net.Uri;
import android.os.AsyncTask;
import android.os.Bundle;
import android.support.annotation.Nullable;
import android.support.v4.app.Fragment;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;

import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.net.HttpURLConnection;
import java.net.URL;
import java.util.Iterator;
import java.util.jar.Attributes;
import java.util.regex.Pattern;

import javax.net.ssl.HttpsURLConnection;


/**
 * A simple {@link Fragment} subclass.
 * Activities that contain this fragment must implement the
 * {@link MainFragment.OnFragmentInteractionListener} interface
 * to handle interaction events.
 * Use the {@link MainFragment#newInstance} factory method to
 * create an instance of this fragment.
 */
public class MainFragment extends Fragment {


    // TODO: Rename parameter arguments, choose names that match
    // the fragment initialization parameters, e.g. ARG_ITEM_NUMBER
    private static final String ARG_PARAM1 = "param1";
    private static final String ARG_PARAM2 = "param2";

    // TODO: Rename and change types of parameters
    private String mParam1;
    private String mParam2;
    private static final Pattern delimeter = Pattern.compile(",\\s+");

    private TextView mResult;

    private OnFragmentInteractionListener mListener;

    public MainFragment() {
        // Required empty public constructor
    }

    /**
     * Use this factory method to create a new instance of
     * this fragment using the provided parameters.
     *
     * @param param1 Parameter 1.
     * @param param2 Parameter 2.
     * @return A new instance of fragment MainFragment.
     */
    // TODO: Rename and change types and number of parameters
    public static MainFragment newInstance(String param1, String param2) {
        MainFragment fragment = new MainFragment();
        Bundle args = new Bundle();
        args.putString(ARG_PARAM1, param1);
        args.putString(ARG_PARAM2, param2);
        fragment.setArguments(args);
        return fragment;
    }

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        if (getArguments() != null) {
            mParam1 = getArguments().getString(ARG_PARAM1);
            mParam2 = getArguments().getString(ARG_PARAM2);
        }

        new PostDataTask().execute("https://www.horizonservers.net/api/v1/PlayerInfo");


    }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {
        // Inflate the layout for this fragment
        View v = inflater.inflate(R.layout.fragment_main, container, false);
        mResult = (TextView) v.findViewById(R.id.tv_result);
        return v;
    }

    @Override
    public void onActivityCreated(@Nullable Bundle savedInstanceState) {
        super.onActivityCreated(savedInstanceState);
    }


    // TODO: Rename method, update argument and hook method into UI event
    public void onButtonPressed(Uri uri) {
        if (mListener != null) {
            mListener.onFragmentInteraction(uri);
        }
    }

    @Override
    public void onAttach(Context context) {
        super.onAttach(context);
        if (context instanceof OnFragmentInteractionListener) {
            mListener = (OnFragmentInteractionListener) context;
        } else {
            throw new RuntimeException(context.toString()
                    + " must implement OnFragmentInteractionListener");
        }
    }

    @Override
    public void onDetach() {
        super.onDetach();
        mListener = null;
    }

    /**
     * This interface must be implemented by activities that contain this
     * fragment to allow an interaction in this fragment to be communicated
     * to the activity and potentially other fragments contained in that
     * activity.
     * <p>
     * See the Android Training lesson <a href=
     * "http://developer.android.com/training/basics/fragments/communicating.html"
     * >Communicating with Other Fragments</a> for more information.
     */
    public interface OnFragmentInteractionListener {
        // TODO: Update argument type and name
        void onFragmentInteraction(Uri uri);
    }

    class PostDataTask extends AsyncTask<String, Void, String> {

        ProgressDialog progressDialog;

        @Override
        protected void onPreExecute() {
            super.onPreExecute();

        }

        @Override
        protected String doInBackground(String... params) {

            try {
                return postData(params[0]);
            } catch (IOException ex) {
                return "Network error !";
            } catch (JSONException ex) {
                return "Data Invalid !";
            }
        }

        @Override
        protected void onPostExecute(String result) {

            try {
                JSONObject jsonObject = new JSONObject(result);

                String NameInfo = jsonObject.getString("name");

                JSONObject jsonObject1 = new JSONObject(NameInfo);

                for(int i = 0; i < jsonObject1.length(); i++){
                    JSONObject jsonPart = new JSONObject();

                    //Log.i("response", jsonPart.getString("response"));
                    String newName = jsonPart.getString("name");
                    //mResult.setText(NameInfo);
                    mResult.setText(newName);
                }


            } catch (JSONException e) {
                mResult.setText("Error!");
            }
            super.onPostExecute(result);


            if (progressDialog != null) {
                progressDialog.dismiss();
            }
        }


        private String postData(String urlPath) throws IOException, JSONException {

            StringBuilder result = new StringBuilder();
            BufferedWriter bufferedWriter = null;
            BufferedReader bufferedReader = null;

            try {
                //Create data to send to server
                JSONObject dataToSend = new JSONObject();
                dataToSend.put("apikey", "UPj07lqWdetOWrk9M8Ya9UZzeIAizjr4sYQRKzkHFYm1KaQDopytCFq9HHCerwNy");
                dataToSend.put("steamid", "STEAM_0:1:90345825");
                dataToSend.put("maptype", "surf");

                //Initialize and config request, then connect to server.


   URL url = new URL(urlPath);
            HttpURLConnection urlConnection = (HttpURLConnection) url.openConnection();
            urlConnection.setReadTimeout(10000 /* milliseconds */);
            urlConnection.setConnectTimeout(10000 /* milliseconds */);
            urlConnection.setRequestMethod("POST");
            urlConnection.setDoOutput(true);  //enable output (body data)
            urlConnection.setRequestProperty("Content-Type", "application/json");// set header
            urlConnection.connect();

            //Write data into server
            OutputStream outputStream = urlConnection.getOutputStream();
            bufferedWriter = new BufferedWriter(new OutputStreamWriter(outputStream));
            bufferedWriter.write(dataToSend.toString());
            bufferedWriter.flush();

            //Read data response from server
            InputStream inputStream = urlConnection.getInputStream();
            bufferedReader = new BufferedReader(new InputStreamReader(inputStream));
            String line;
            while ((line = bufferedReader.readLine()) != null) {
                result.append(line).append("&");
            }
        } finally {
            if (bufferedReader != null) {
                bufferedReader.close();
            }
            if (bufferedWriter != null) {
                bufferedWriter.close();
            }
        }

        return result.toS,tring();

    }
}

}

La parte específica que imprime la información en la pantalla es

    @Override
    protected void onPostExecute(String result) {

        try {
            JSONObject jsonObject = new JSONObject(result);

            String NameInfo = jsonObject.getString("name");

            JSONObject jsonObject1 = new JSONObject(NameInfo);

            for(int i = 0; i < jsonObject1.length(); i++){
                JSONObject jsonPart = new JSONObject();

                //Log.i("response", jsonPart.getString("response"));
                String newName = jsonPart.getString("name");
                //mResult.setText(NameInfo);
                mResult.setText(newName);
            }


        } catch (JSONException e) {
            mResult.setText("Error!");
        }
        super.onPostExecute(result);


        if (progressDialog != null) {
            progressDialog.dismiss();
        }
    }

¿Cómo puedo analizar estos objetos de la matriz / objetos? Ya he intentado convertirlo en una matriz, pero en ese momento empeora. Gracias de antemano por su ayuda.

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