Apps Android mysql connexion problem

[anddebutan]

Hello,

I am trying to connect my android application with mysql database.
This is my source code:

php code:

<?php
  mysql_connect("localhost","root","");
  mysql_select_db("bdville");
  $sql=mysql_query("select * from tblville where Nom_ville like '".$_REQUEST['ville']."%'");
  while($row=mysql_fetch_assoc($sql))
  $output[]=$row;
  print(json_encode($output));
  mysql_close();
?>

classVilleActivity.java:

package com.exemple.ville;
 
import java.io.BufferedReader;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.util.ArrayList;
 
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.NameValuePair;
import org.apache.http.client.HttpClient;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.message.BasicNameValuePair;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
 
import com.exemple.ville.R;
 
import android.app.Activity;
import android.os.Bundle;
import android.util.Log;
import android.widget.LinearLayout;
import android.widget.TextView;
 
public class VilleActivity extends Activity {
	TextView txt;
	@Override
	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.main);
 
		LinearLayout rootLayout = new LinearLayout(getApplicationContext());  
		txt = new TextView(getApplicationContext());  
		rootLayout.addView(txt);  
		setContentView(rootLayout);  
 
		// D