Bonjour, 

J'essaye de récupérer les articles sous forme de tableau JSON, et de les mettre dans une listView mais j'ai cette erreur : 

Je vous remercie.

I/System.out: Résultats : [{"0":"9","ID":"9","1":"f","Nom":"f","2":"f","Descriptif":"f","3":"2000","Prix":"2000","4":"Neuf","Etat":"Neuf","5":"f","Ville":"f","6":"Envoy\u00e9","Livraison":"Envoy\u00e9"},{"0":"18","ID":"18","1":"PC","Nom":"PC","2":"Acer","Descriptif":"Acer","3":"1010","Prix":"1010","4":"Neuf","Etat":"Neuf","5":"Charleroi","Ville":"Charleroi","6":"Envoy\u00e9","Livraison":"Envoy\u00e9"}]

I/System.out: Exception: Value of type java.lang.String cannot be converted to JSONArray

package com.example.davidwolfs.projet_annonce;

import android.app.Activity;
import android.content.Intent;
import android.os.AsyncTask;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ListView;
import android.widget.RadioButton;
import android.widget.RadioGroup;
import android.widget.TableLayout;
import android.widget.TableRow;
import android.widget.TextView;
import android.widget.Toast;

import org.apache.http.HttpResponse;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.DefaultHttpClient;
import org.json.JSONArray;
import org.json.JSONObject;
import org.w3c.dom.Text;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URI;
import java.net.URL;
import java.net.URLConnection;
import java.net.URLEncoder;
import java.util.ArrayList;
import java.util.List;

/**
 * Created by David Wolfs on 07-08-18.
 */

public class RechercherArticlePrix extends AsyncTask {
    private double prixMin;
    private double prixMax;
    public AsyncResponse delegate = null;
    String json_url;
    String JSON_STRING;
    ListView listView;


    public RechercherArticlePrix(double prixMin, double prixMax) {
        this.prixMin = prixMin;
        this.prixMax = prixMax;
        this.listView = listView;
    }

    public double getPrixMin() {
        return prixMin;
    }

    public void setPrixMin(double prixMin) {
        this.prixMin = prixMin;
    }

    public double getPrixMax() {
        return prixMax;
    }

    public void setPrixMax(double prixMax) {
        this.prixMax = prixMax;
    }
/*
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_afficher_article_par_prix);

        this.tableLayout = (TableLayout) findViewById(R.id.tableLayout);
        this.tableRow = (TableRow) findViewById(R.id.tableRow);
        this.lv = (ListView) findViewById(R.id.listView);


        String[] prenoms = new String[]{
                "Antoine", "Benoit", "Cyril", "David", "Eloise", "Florent",
                "Gerard", "Hugo", "Ingrid", "Jonathan", "Kevin", "Logan",
                "Mathieu", "Noemie", "Olivia", "Philippe", "Quentin", "Romain",
                "Sophie", "Tristan", "Ulric", "Vincent", "Willy", "Xavier",
                "Yann", "Zoé"
        };
        adapter = new ArrayAdapter<String>(this,
                android.R.layout.simple_list_item_1, prenoms);
        lv.setAdapter(adapter);

       RechercherArticlePrix_AsyncTask rechercherArticlePrix_AsyncTask = new RechercherArticlePrix_AsyncTask();
        rechercherArticlePrix_AsyncTask.execute();
    }*/

        @Override
        protected void onPreExecute() {

        }

        @Override
        protected Object doInBackground(Object[] objects) {
            {
           /* try{
                String link = "http://localhost/annonce/connectToDB.php";

                URL url = new URL(link);
                HttpClient client = new DefaultHttpClient();
                HttpGet request = new HttpGet();
                request.setURI(new URI(link));
                HttpResponse response = client.execute(request);
                BufferedReader in = new BufferedReader(new
                        InputStreamReader(response.getEntity().getContent()));

                StringBuffer sb = new StringBuffer("");
                String line="";

                while ((line = in.readLine()) != null) {
                    sb.append(line);
                    break;
                }

                in.close();
                return sb.toString();
            } catch(Exception e){
                return new String("Exception: " + e.getMessage());
            }
        }*/
                try {
                    String link = "http://192.168.1.44:80/annonce/rechercherArticlePrix.php";
                    String data = URLEncoder.encode("prixMin", "UTF-8") + "=" +
                            URLEncoder.encode(prixMin + "", "UTF-8");
                    data += "&" + URLEncoder.encode("prixMax", "UTF-8") + "=" +
                            URLEncoder.encode(prixMax + "", "UTF-8");

                    System.out.println(link + data);
                    URL url = new URL(link);
                    URLConnection conn = url.openConnection();

                    conn.setDoOutput(true);
                    OutputStreamWriter wr = new OutputStreamWriter(conn.getOutputStream());

                    wr.write( data );
                    wr.flush();

                    BufferedReader reader = new BufferedReader(new
                            InputStreamReader(conn.getInputStream()));

                    StringBuilder sb = new StringBuilder();
                    String line = null;

                    // Read Server Response
                    while ((line = reader.readLine()) != null) {
                        sb.append(line);
                        break;
                    }
                    System.out.println("Resultat requete Rechercher article prix : "+sb.toString());
                    String result = sb.toString();
                    System.out.println("Résultats : " + result);

                    JSONArray ja = new JSONArray(result);
                    JSONObject jo = null;
                    // data = new String[ja.length()];

                    for (int i = 0; i < ja.length(); i++) {
                        jo = ja.getJSONObject(i);
                        System.out.println(jo);
                        //data[i] = jo.getString("Name");
                    }
                    result = sb.toString();
                    return sb.toString();
                } catch (Exception e) {
                    System.out.println("Exception: " + e.getMessage());
                    return new String("Exception: " + e.getMessage());
                }
            }
        }

        protected void onProgressUpdate(String... values) {

        }


        protected void onPostExecute(String result) {
            delegate.processFinish(prixMin+"");
            //Toast.makeText(this, result, Toast.LENGTH_SHORT).show();
            System.out.println("RESULTAT  : " + result);
        }

}