IM项目，使用openfire服务，Smack的android端概述

目前正在做一个IM（即时通讯）项目，所以就拿出来和大家分享一下，自己也做个记录。

下面就介绍一下：

Java领域的即时通信的解决方案可以考虑openfire+spark+smack。当然也有其他的选择。

首先需要在电脑上安装openfire，这就是服务器。

android端开发的话，可以使用asmack，这个有着强大的API的提供。

1.先定义一个服务器连接工具类：

/**
*
* XMPP服务器连接工具类.
*
*/
public class XmppConnectionManager {
private XMPPConnection connection;
private static XmppConnectionManager xmppConnectionManager;

private XmppConnectionManager() {

}

public static XmppConnectionManager getInstance() {
if (xmppConnectionManager == null) {
xmppConnectionManager = new XmppConnectionManager();
}
return xmppConnectionManager;
}

// init
public XMPPConnection init() {
Connection.DEBUG_ENABLED = false;
ProviderManager pm = ProviderManager.getInstance();
configure(pm);

connectionConfig = new ConnectionConfiguration(
"192.168.1.11", 5222,
"localhost");<span style="white-space:pre">			</span>//三个参数分别为服务器地址，端口号，服务器名称
connectionConfig.setSASLAuthenticationEnabled(false);// 不使用SASL验证，设置为false
connectionConfig
.setSecurityMode(ConnectionConfiguration.SecurityMode.enabled);
// 允许自动连接
connectionConfig.setReconnectionAllowed(false);
// 允许登陆成功后更新在线状态
connectionConfig.setSendPresence(false);
// 收到好友邀请后manual表示需要经过同意,accept_all表示不经同意自动为好友
Roster.setDefaultSubscriptionMode(Roster.SubscriptionMode.manual);
connection = new XMPPConnection(connectionConfig);
return connection;
}

/**
*
* 返回一个有效的xmpp连接,如果无效则返回空.
*/
public XMPPConnection getConnection() {
if (connection == null) {
Connection.DEBUG_ENABLED = false;
ProviderManager pm = ProviderManager.getInstance();
configure(pm);

connectionConfig = new ConnectionConfiguration(
"172.17.10.37", 5222,
"localhost");
connectionConfig.setSASLAuthenticationEnabled(false);// 不使用SASL验证，设置为false
connectionConfig
.setSecurityMode(ConnectionConfiguration.SecurityMode.enabled);
// 允许自动连接
connectionConfig.setReconnectionAllowed(false);
// 允许登陆成功后更新在线状态
connectionConfig.setSendPresence(true);
// 收到好友邀请后manual表示需要经过同意,accept_all表示不经同意自动为好友
Roster.setDefaultSubscriptionMode(Roster.SubscriptionMode.manual);
connection = new XMPPConnection(connectionConfig);
return connection;
}
return connection;
}

/**
*
* 销毁xmpp连接.
*/
public void disconnect() {
if (connection != null) {
connection.disconnect();
}
}

public void configure(ProviderManager pm) {

// Private Data Storage
pm.addIQProvider("query", "jabber:iq:private",
new PrivateDataManager.PrivateDataIQProvider());

// Time
try {
pm.addIQProvider("query", "jabber:iq:time",
Class.forName("org.jivesoftware.smackx.packet.Time"));
} catch (ClassNotFoundException e) {
}

// XHTML
pm.addExtensionProvider("html", "http://jabber.org/protocol/xhtml-im",
new XHTMLExtensionProvider());

// Roster Exchange
pm.addExtensionProvider("x", "jabber:x:roster",
new RosterExchangeProvider());
// Message Events
pm.addExtensionProvider("x", "jabber:x:event",
new MessageEventProvider());
// Chat State
pm.addExtensionProvider("active",
"http://jabber.org/protocol/chatstates",
new ChatStateExtension.Provider());
pm.addExtensionProvider("composing",
"http://jabber.org/protocol/chatstates",
new ChatStateExtension.Provider());
pm.addExtensionProvider("paused",
"http://jabber.org/protocol/chatstates",
new ChatStateExtension.Provider());
pm.addExtensionProvider("inactive",
"http://jabber.org/protocol/chatstates",
new ChatStateExtension.Provider());
pm.addExtensionProvider("gone",
"http://jabber.org/protocol/chatstates",
new ChatStateExtension.Provider());

// FileTransfer
pm.addIQProvider("si", "http://jabber.org/protocol/si",
new StreamInitiationProvider());

// Group Chat Invitations
pm.addExtensionProvider("x", "jabber:x:conference",
new GroupChatInvitation.Provider());
// Service Discovery # Items
pm.addIQProvider("query", "http://jabber.org/protocol/disco#items",
new DiscoverItemsProvider());
// Service Discovery # Info
pm.addIQProvider("query", "http://jabber.org/protocol/disco#info",
new DiscoverInfoProvider());
// Data Forms
pm.addExtensionProvider("x", "jabber:x:data", new DataFormProvider());
// MUC User
pm.addExtensionProvider("x", "http://jabber.org/protocol/muc#user",
new MUCUserProvider());
// MUC Admin
pm.addIQProvider("query", "http://jabber.org/protocol/muc#admin",
new MUCAdminProvider());
// MUC Owner
pm.addIQProvider("query", "http://jabber.org/protocol/muc#owner",
new MUCOwnerProvider());
// Delayed Delivery
pm.addExtensionProvider("x", "jabber:x:delay",
new DelayInformationProvider());
// Version
try {
pm.addIQProvider("query", "jabber:iq:version",
Class.forName("org.jivesoftware.smackx.packet.Version"));
} catch (ClassNotFoundException e) {
}
// VCard
pm.addIQProvider("vCard", "vcard-temp", new VCardProvider());
// Offline Message Requests
pm.addIQProvider("offline", "http://jabber.org/protocol/offline",
new OfflineMessageRequest.Provider());
// Offline Message Indicator
pm.addExtensionProvider("offline",
"http://jabber.org/protocol/offline",
new OfflineMessageInfo.Provider());
// Last Activity
pm.addIQProvider("query", "jabber:iq:last", new LastActivity.Provider());
// User Search
pm.addIQProvider("query", "jabber:iq:search", new UserSearch.Provider());
// SharedGroupsInfo
pm.addIQProvider("sharedgroup",
"http://www.jivesoftware.org/protocol/sharedgroup",
new SharedGroupsInfo.Provider());
// JEP-33: Extended Stanza Addressing
pm.addExtensionProvider("addresses",
"http://jabber.org/protocol/address",
new MultipleAddressesProvider());

}
}

所有的登陆，注册，发消息，发文件，接消息等等所有的操作都需要线连接服务器，所以必须有一个XMPPConnection对象，从上面的服务器工具类中可以获得这个对象

有了这，其他的才得以实现，说了这么多，一句话，这个必须的。

下一篇就开始讲一下登陆，注册等操作。