Bonsoir à tous,

je suis en train d'établir une connexion entre mon application android et ma base de données mysql. ci-dessous mon code source:

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package com.exemple.test; 
import java.util.ArrayList;  
import org.apache.http.NameValuePair;  
import org.apache.http.message.BasicNameValuePair;  
import android.view.View;  
import android.widget.Button;  
import android.widget.EditText;  
import android.widget.TextView;  
import android.app.Activity;
import android.os.Bundle;
 
public class TestActivity extends Activity {
 
	EditText un,pw;  
	TextView error;  
	Button ok;  
	/** Called when the activity is first created. */  
	@Override  
	public void onCreate(Bundle savedInstanceState) {  
	super.onCreate(savedInstanceState);  
	setContentView(R.layout.main);  
	un=(EditText)findViewById(R.id.et_un);  
	pw=(EditText)findViewById(R.id.et_pw);  
	ok=(Button)findViewById(R.id.btn_login);  
	error=(TextView)findViewById(R.id.tv_error);  
	ok.setOnClickListener(new View.OnClickListener() {  
 
	@Override  
 
	public void onClick(View v) {  
	// TODO Auto-generated method stub  
	ArrayList<NameValuePair> postParameters = new ArrayList<NameValuePair>();  
	postParameters.add(new BasicNameValuePair("ID_Candidat", un.getText().toString()));  
	postParameters.add(new BasicNameValuePair("MP_candidat", pw.getText().toString()));  
 
	//String valid = "1";  
	String response = null;  
	try {  
	response = CustomHttpClient.executeHttpPost("http://10.0.2.2/mesRequetes/verifier.php", postParameters);  //Enetr Your remote PHP,ASP, Servlet file link  
	String res=response.toString();  
	// res = res.trim();  
	res= res.replaceAll("\\s+","");  
	//error.setText(res);  
	if(res.equals("1"))  
	error.setText("Correct Username or Password");  
	else  
	error.setText("Sorry!! Incorrect Username or Password");  
 
	} catch (Exception e) {  
 
	un.setText(e.toString());  
	}}  
	});  
	}}
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 package com.exemple.test;
import java.io.BufferedReader;  
import java.io.IOException;  
import java.io.InputStreamReader;  
import java.net.URI;  
import java.util.ArrayList;  
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.HttpGet;  
import org.apache.http.client.methods.HttpPost;  
import org.apache.http.conn.params.ConnManagerParams;  
import org.apache.http.impl.client.DefaultHttpClient;  
import org.apache.http.params.HttpConnectionParams;  
import org.apache.http.params.HttpParams;
public class CustomHttpClient {
 
	/** The time it takes for our client to timeout */  
	public static final int HTTP_TIMEOUT = 30 * 1000; // milliseconds  
	/** Single instance of our HttpClient */  
	private static HttpClient mHttpClient;  
	/** 
        * Get our single instance of our HttpClient object. 
        * 
        * @return an HttpClient object with connection parameters set 
        */  
	private static HttpClient getHttpClient() {  
	if (mHttpClient == null) {  
	mHttpClient = new DefaultHttpClient();  
	final HttpParams params = mHttpClient.getParams();  
	HttpConnectionParams.setConnectionTimeout(params, HTTP_TIMEOUT);  
	HttpConnectionParams.setSoTimeout(params, HTTP_TIMEOUT);  
	ConnManagerParams.setTimeout(params, HTTP_TIMEOUT);  
	}  
	return mHttpClient;  
	}  
	/** 
        * Performs an HTTP Post request to the specified url with the 
        * specified parameters. 
        * 
        * @param url The web address to post the request to 
        * @param postParameters The parameters to send via the request 
        * @return The result of the request 
        * @throws Exception 
        */  
	public static String executeHttpPost(String url, ArrayList postParameters) throws Exception {  
	BufferedReader in = null;  
	try {  
	HttpClient client = getHttpClient();  
	HttpPost request = new HttpPost(url);  
	UrlEncodedFormEntity formEntity = new UrlEncodedFormEntity(postParameters);  
	request.setEntity(formEntity);  
	HttpResponse response = client.execute(request);  
	in = new BufferedReader(new InputStreamReader(response.getEntity().getContent()));  
	StringBuffer sb = new StringBuffer("");  
	String line = "";  
	String NL = System.getProperty("line.separator");  
	while ((line = in.readLine()) != null) {  
	sb.append(line + NL);  
	}  
	in.close();  
	String result = sb.toString();  
	return result;  
	} finally {  
	if (in != null) {  
	try {  
	in.close();  
	} catch (IOException e) {  
	e.printStackTrace();  
	}}}}  
	public static String executeHttpGet(String url) throws Exception {  
	BufferedReader in = null;  
	try {  
	HttpClient client = getHttpClient();  
	HttpGet request = new HttpGet();  
	request.setURI(new URI(url));  
	HttpResponse response = client.execute(request);  
	in = new BufferedReader(new InputStreamReader(response.getEntity().getContent()));  
	StringBuffer sb = new StringBuffer("");  
	String line = "";  
	String NL = System.getProperty("line.separator");  
	while ((line = in.readLine()) != null) {  
	sb.append(line + NL);  
	}  
	in.close();  
	String result = sb.toString();  
	return result;  
	} finally {  
	if (in != null) {  
	try {  
	in.close();  
	} catch (IOException e) {  
	e.printStackTrace();  
	}}}}}
et le code php:
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 < ?php
$un=$_POST['ID_Candidat'];
$pw=$_POST['MP_candidat'];
//connect to the db
$user = ‘root’;
$pswd = ‘’;
$db = ‘tmjob_db’;
$conn = mysql_connect(‘localhost’, 'root', '');
mysql_select_db($db, $conn);
//run the query to search for the username and password the match
$query = “SELECT * FROM candidat WHERE ID_Candidat = ‘$un’ AND MP_candidat = ‘$pw’”;
$result = mysql_query($query) or die(“Unable to verify user because : ” . mysql_error());
//this is where the actual verification happens
if(mysql_num_rows($result) > 0)
// ( $un == “ajay” && $pw == “ajay”)
echo 1; // for correct login response
else
echo 0; // for incorrect login response
?>

Le problème c'est au nvieau de "id" puisqu'on me souligne les lignes suivantes
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 un=(EditText)findViewById(R.id.et_un);  
	pw=(EditText)findViewById(R.id.et_pw);  
	ok=(Button)findViewById(R.id.btn_login);  
	error=(TextView)findViewById(R.id.tv_error);
Merci de m'aider