Créer un client XMPP Android

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical" android:layout_width="fill_parent"
    android:layout_height="fill_parent">
    <TextView android:layout_width="wrap_content"
        android:layout_height="wrap_content" android:text="Destinataire :" />
    <EditText android:id="@+id/recipient" android:layout_width="fill_parent"
        android:layout_height="wrap_content" android:singleLine="true"
        android:autoText="false" android:capitalize="none"
        android:scrollHorizontally="true" />
    <ListView android:id="@+id/thread" android:layout_width="wrap_content"
        android:layout_height="wrap_content" android:layout_weight="1"
        android:scrollbars="horizontal" />
    <EditText android:id="@+id/message" android:layout_width="fill_parent"
        android:layout_height="wrap_content" android:singleLine="true"
        android:autoText="false" android:capitalize="none"
        android:scrollHorizontally="true" />
    <Button android:id="@+id/send" android:layout_width="fill_parent"
        android:layout_height="wrap_content" android:text="Envoyer">
    </Button>
</LinearLayout>

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
      package="com.developpez.florentgarin.android"
      android:versionCode="1"
      android:versionName="1.0">
    <application android:icon="@drawable/icon" android:label="@string/app_name">
        <activity android:name=".ClientJabberActivity"
                  android:label="@string/app_name">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />
                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>
    <uses-sdk android:minSdkVersion="4" />
    <uses-permission android:name="android.permission.INTERNET" />
</manifest>

package com.developpez.florentgarin.android;

import java.util.ArrayList;
import java.util.List;


import org.jivesoftware.smack.*;
import org.jivesoftware.smack.filter.*;
import org.jivesoftware.smack.packet.*;
import org.jivesoftware.smack.util.StringUtils;

import android.app.Activity;
import android.os.Bundle;
import android.os.Handler;
import android.view.View;
import android.widget.*;

public class ClientJabberActivity extends Activity {
    
    private final static String SERVER_HOST = "talk.google.com";
    private final static int SERVER_PORT = 5222;
    private final static String SERVICE_NAME = "gmail.com";    
    private final static String LOGIN = "xxxxx.xxxxx@gmail.com";
    private final static String PASSWORD = "xxxxx";


    private List<String> m_discussionThread;
    private ArrayAdapter<String> m_discussionThreadAdapter;
    private XMPPConnection m_connection;
    private Handler m_handler;
    
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        m_handler = new Handler();
        try {
            initConnection();
        } catch (XMPPException e) {
            e.printStackTrace();
        }
        
        final EditText recipient = (EditText) this.findViewById(R.id.recipient);
        final EditText message = (EditText) this.findViewById(R.id.message);        
        ListView list = (ListView) this.findViewById(R.id.thread);
        
        m_discussionThread = new ArrayList<String>();
        m_discussionThreadAdapter = new ArrayAdapter<String>(this,
                R.layout.multi_line_list_item, m_discussionThread);
        list.setAdapter(m_discussionThreadAdapter);
        
        Button send = (Button) this.findViewById(R.id.send);
        send.setOnClickListener(new View.OnClickListener() {
            public void onClick(View view) {
                String to = recipient.getText().toString();
                String text = message.getText().toString();
        
                Message msg = new Message(to, Message.Type.chat);
                msg.setBody(text);
                m_connection.sendPacket(msg);
                m_discussionThread.add("moi :");
                m_discussionThread.add(text);
                m_discussionThreadAdapter.notifyDataSetChanged();
            }
        });
    }


    private void initConnection() throws XMPPException {
        //Initialisation de la connexion
        ConnectionConfiguration config =
                new ConnectionConfiguration(SERVER_HOST, SERVER_PORT, SERVICE_NAME);
        m_connection = new XMPPConnection(config);
        m_connection.connect();
        m_connection.login(LOGIN, PASSWORD);
        Presence presence = new Presence(Presence.Type.available);
        m_connection.sendPacket(presence);
       
        //enregistrement de l'écouteur de messages
        PacketFilter filter = new MessageTypeFilter(Message.Type.chat);
        m_connection.addPacketListener(new PacketListener() {
                public void processPacket(Packet packet) {
                    Message message = (Message) packet;
                    if (message.getBody() != null) {
                        String fromName = StringUtils.parseBareAddress(message
                                .getFrom());
                        m_discussionThread.add(fromName + ":");
                        m_discussionThread.add(message.getBody());
                        
                        m_handler.post(new Runnable() {
                            public void run() {
                                m_discussionThreadAdapter.notifyDataSetChanged();
                            }
                        });
                    }
                }
            }, filter);
    }

}

<?xml version="1.0" encoding="utf-8"?>
<TextView xmlns:android="http://schemas.android.com/apk/res/android"
          android:textStyle="bold"
          android:singleLine="false"
          android:layout_width="fill_parent"
          android:layout_height="wrap_content"/>