1. Android Studio依赖或者官网下载

  // XMPP通信
  compile 'org.igniterealtime.smack:smack-im:4.2.0'
  compile 'org.igniterealtime.smack:smack-tcp:4.2.0'
  compile "org.igniterealtime.smack:smack-android-extensions:4.2.0"
  compile "org.igniterealtime.smack:smack-android:4.2.0"

2. 服务器连接

/**
   * 连接服务器
   * @return 连接服务器对象
   */
  public void connect() {
    try {
      XMPPTCPConnectionConfiguration configuration =
          XMPPTCPConnectionConfiguration.builder().setXmppDomain(XMPP_DOMAIN) // 设置域名
              .setHostAddress(InetAddress.getByName(XMPP_HOST)) // 设置主机
              .setPort(5222) // 设置端口
              .setSecurityMode(ConnectionConfiguration.SecurityMode.disabled) // 禁用SSL连接
              .setCompressionEnabled(false) // 禁用SSL连接
              //.setSendPresence(false) // 设置为离线状态
              .setDebuggerEnabled(true) // 开启调试模式
              .build();
      // 设置需要经过同意才可以添加好友
      Roster.setDefaultSubscriptionMode(Roster.SubscriptionMode.manual);
      AbstractXMPPConnection connection = new XMPPTCPConnection(configuration);
      connection.connect();// 连接, 可设置监听
      connection.addConnectionListener(new XMPPConnectionListener());
      this.mConnection = connection;
    } catch (UnknownHostException e) {
      e.printStackTrace();
    } catch (XmppStringprepException e) {
      e.printStackTrace();
    } catch (InterruptedException | IOException | XMPPException | SmackException e) {
      e.printStackTrace();
    }
  }

其中XMPPConnectionListener类实际上是实现ConnectionListener接口。

/**
 * 服务器连接监听
 * Created by mazaiting on 2017/9/19.
 */

public class XMPPConnectionListener implements ConnectionListener {

  @Override public void connected(XMPPConnection connection) {}

  @Override public void authenticated(XMPPConnection connection, boolean resumed) {}

  @Override public void connectionClosed() {}

  @Override public void connectionClosedOnError(Exception e) {}

  @Override public void reconnectionSuccessful() {}

  @Override public void reconnectingIn(int seconds) {}

  @Override public void reconnectionFailed(Exception e) {}
}

关闭连接则使用

  /**
   * 关闭连接
   */
  public void disConnect() {
    checkConnect();
    if (mConnection.isConnected()) mConnection.disconnect();
    mConnection = null;
  }

3. 登录

  /**
   * 登录服务器
   * @param userName 用户名
   * @param passWord 密码
   * @return 是否登录成功。 true 成功; false 失败。
   */
  public boolean login(String userName, String passWord) {
    checkConnect(); // 检查是否连接
    try {
      if (!mConnection.isAuthenticated()){ // 判断是否登录
        mConnection.login(userName, passWord);
        addListener(); // 设置一些监听
        return true;
      }
      return false;
    } catch (XMPPException | SmackException | InterruptedException | IOException e) {
      Logger.e("登录出错");
      e.printStackTrace();
      return false;
    }
  }

4. 注册
   在注册时非安全链接，无法注册的情况，采取smack.jar内部代码，越过非安全链接的判断。

  /**
   * 创建用户
   * @param userName 用户名
   * @param passWord 密码
   * @param attributes 属性
   */
  public void createAccount(String userName, String passWord, Map<String, String> attributes)
      throws SmackException.NotConnectedException, InterruptedException,
      XMPPException.XMPPErrorException, SmackException.NoResponseException {
    if (StringUtils.isNullOrEmpty(userName)) {
      throw new IllegalArgumentException("Username must not be null");
    }
    if (StringUtils.isNullOrEmpty(passWord)) {
      throw new IllegalArgumentException("Password must not be null");
    }

    attributes.put("username", userName); // 设置用户名
    attributes.put("password", passWord); // 设置密码
    Registration reg = new Registration(attributes);
    reg.setType(IQ.Type.set); // 设置类型
    reg.setTo(mConnection.getXMPPServiceDomain());// 设置发送地址
    createStanzaCollectorAndSend(reg).nextResultOrThrow();
  }

  private StanzaCollector createStanzaCollectorAndSend(IQ req) throws
      SmackException.NotConnectedException, InterruptedException {
    StanzaCollector collector = mConnection.createStanzaCollectorAndSend(new StanzaIdFilter(req.getStanzaId()), req);
    return collector;
  }

5. 获取当前用户

  /**
   * 获取当前用户
   */
  public EntityFullJid getCurrentUser() {
    return mConnection.getUser();
  }

6. 获取好友列表

  /***
   * 获取好友列表
   */
  public void getFriendList() {
    checkConnect();
    Roster roster = Roster.getInstanceFor(mConnection);
    Set<RosterEntry> entries = roster.getEntries();
    Logger.e(entries.size() + "");
    for (RosterEntry entry : entries) {
      Logger.e(entry.toString());
    }
  }

7. 添加角色监听

  /**
   * 添加关于角色的监听
   */
  private void addRosterListener() {
    // 获取当前角色
    Roster roster = Roster.getInstanceFor(mConnection);
    // 接收到好友信息变化
    mReceiverFriendStatusListener = new ReceiverFriendStatusListener();
    roster.addRosterListener(mReceiverFriendStatusListener);
    // 接收到添加好友信息
    mAddFriendMessageListener = new AddFriendMessageListener();
    roster.addSubscribeListener(mAddFriendMessageListener);
  }

/**
 * 获取到其他人添加自己的信息监听
 * Created by mazaiting on 2017/9/19.
 */
public class AddFriendMessageListener implements SubscribeListener {
  @Override public SubscribeAnswer processSubscribe(Jid from, Presence subscribeRequest) {
    // TODO添加好友请求
    Logger.e("processSubscribe");
    return null;
  }
}

/**
 * 可以接收到其他人是否删除了自己,好友在线状态改变
 * Created by mazaiting on 2017/9/19.
 */
public class ReceiverFriendStatusListener implements RosterListener {
  @Override public void entriesAdded(Collection<Jid> addresses) {
    Logger.e("entriesAdded");
  }

  @Override public void entriesUpdated(Collection<Jid> addresses) {
    Logger.e("entriesUpdated");
  }

  @Override public void entriesDeleted(Collection<Jid> addresses) {
    Logger.e("entriesDeleted");
  }

  @Override public void presenceChanged(Presence presence) {
    Logger.e("presenceChanged");
  }
}

8. 设置当前用户状态

  /**
   * 设置在线、离线等状态
   */
  public void setOnLine(Presence.Type type) {
    try {
      checkConnect();
      if (isOnLine != type) {
        Presence presence = new Presence(type);
        //presence.setStatus("Gone fishing");// 设置状态消息
        mConnection.sendStanza(presence);
        isOnLine = type;
      }
    } catch (Exception e) {
      e.printStackTrace();
    }
  }