Android gallery实现图片的左右循环旋转源码分享
使用Android自带Gallery组件实现CoverFlow，源码+解析

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主动发送信息给某个用户
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XMPPConnection.DEBUG_ENABLED = true;
//设置服务器地址
XMPPConnection conn = new XMPPConnection("127.0.0.1"); 
conn.connect();
//输入账号和密码登陆
conn.login("test2@127.0.0.1", "123456"); 
//创建一个和test1的对话，并设置信息监听
Chat mychat = conn.getManager().create("test1@127.0.0.1",
		new MessageListener() {
			@Override
			public void processMessage(Chat chat,, Message message) {
				String messageBody = message.getBody();
				System.out.println("收到信息："+messageBody);
			}
});
//发送给test1文本信息
mychat.sendMessage("hello");
//退出登陆
conn.disconnect();
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设置自己的登陆状态
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XMPPConnection.DEBUG_ENABLED = true;
//设置服务器地址
XMPPConnection conn = new XMPPConnection("127.0.0.1"); 
conn.connect();
//输入账号和密码登陆
conn.login("test2@127.0.0.1", "123456"); 

//设置登陆后的个人状态信息
Presence p = new Presence(Presence.Type.available);
p.setStatus("发呆中。。。");
conn.sendPacket(p);

//退出登陆
conn.disconnect();
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被动接收用户发来的信息
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XMPPConnection.DEBUG_ENABLED = true;
//设置服务器地址
XMPPConnection conn = new XMPPConnection("127.0.0.1"); 
conn.connect();
//输入账号和密码登陆
conn.login("test1@127.0.0.1", "123456"); 
//设置信息的监听
conn.getChatManager().addChatListener(new ChatManagerListener() {
	@Override
	public void chatCreated(Chat chat, boolean createdLocally) {
		chat.addMessageListener(new MessageListener() {
			@Override
			public void processMessage(Chat chat, Message message) {
				String messageBody = message.getBody();	
				System.out.println("接收到信息："+messageBody);				
			}
		});
	}
});
//退出登陆
conn.disconnect();
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获取我的好友列表
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//设置服务器地址
XMPPConnection conn = new XMPPConnection("127.0.0.1"); 
conn.connect();
//输入账号和密码登陆
conn.login("test1@127.0.0.1", "123456"); 
Collection<RosterEntry> rosters = conn.getRoster().getEntries();
System.out.println("我的好友列表：=======================");
for(RosterEntry rosterEntry : rosters){
	System.out.print("name: "+rosterEntry.getName()+",jid: "+rosterEntry.getUser());
	System.out.println("");
}
System.out.println("我的好友列表：=======================");

conn.disconnect();
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聊天窗口输入状态，使用XEP-0085 协议
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//发送给test1初始文本信息,附带输入状态
Message mess = new Message();
mess.addExtension(new ChatStateExtension(ChatState.active));
mychat.sendMessage(mess);
//发送给test1初始文本信息,附带正在输入的状态
Message mess = new Message();
mess.addExtension(new ChatStateExtension(ChatState.composing));
mychat.sendMessage(mess);

//发送给test1初始文本信息,附带暂停输入的状态
Message mess = new Message();
mess.addExtension(new ChatStateExtension(ChatState.paused));
mychat.sendMessage(mess);
//其他略。。。

//接收的时候
public void processMessage(Chat chat, Message message) {
	String messageBody = message.getBody();
	PacketExtension pe;
	
	pe = message.getExtension("composing","http://jabber.org/protocol/chatstates");
	if(pe != null){
		System.out.println("对方正在输入......");
	}
	
	pe = message.getExtension("active","http://jabber.org/protocol/chatstates");
	if(pe != null){
		System.out.println("接收到信息："+messageBody);
	}

	pe = message.getExtension("paused","http://jabber.org/protocol/chatstates");
	if(pe != null){
		System.out.println("对方已暂停输入");
	}

	pe = message.getExtension("inactive","http://jabber.org/protocol/chatstates");
	if(pe != null){
		System.out.println("对方聊天窗口失去焦点");
	}

	pe = message.getExtension("gone","http://jabber.org/protocol/chatstates");
	if(pe != null){
		System.out.println("对方聊天窗口被关闭");
	}
}
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接收邀请，加入多人聊天房间
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MultiUserChat.addInvitationListener(conn, new InvitationListener() {
	@Override
	public void invitationReceived(XMPPConnection conn, String room,
			String inviter, String reason, String password, Message message) {
		MultiUserChat multiUserChat = new MultiUserChat(conn, room);
		System.out.println("收到来自 "+inviter+" 的聊天室邀请。邀请附带内容："+reason);
		try {
			multiUserChat.join("test2", password);
		} catch (XMPPException e) {
			System.out.println("加入聊天室失败");
			e.printStackTrace();
		}
		System.out.println("成功加入聊天室");
		multiUserChat.addMessageListener(new PacketListener() {
			@Override
			public void processPacket(Packet packet) {
				Message message = (Message)packet;
				//接收来自聊天室的聊天信息
				System.out.println(message.getFrom()+":"+message.getBody());
			}
		});
	}
	//发送信息到聊天室
	multiUserChat.sendMessage("新手到来，大家关照！");
});

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登陆gtalk
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XMPPConnection conn = new XMPPConnection(new ConnectionConfiguration("talk.google.com", 5222, "gmail.com"));
conn.connect();
//输入gtalk的账号密码
conn.login("88888888", "8888888888"); 
Collection<RosterEntry> rosters = conn.getRoster().getEntries();
//获取gtalk上的好友列表
System.out.println("我的好友列表：=======================");  
for(RosterEntry rosterEntry : rosters){
	System.out.print("name: "+rosterEntry.getName()+",jid: "+rosterEntry.getUser());
	System.out.println("");
}
System.out.println("我的好友列表：=======================");

conn.disconnect();
==========================================================================

也请看代码吧：

//这个放类里 private Vibrator vibrator = null; //震动，这个Long数组是震动的间隔和强度,那个2是重复震动 long[] pattern = {1000,1000,1000,1000}; vibrator = (Vibrator) getSystemService(VIBRATOR_SERVICE); vibrator.vibrate(pattern, 2); //退出时候需要释放vibrator,我直接放onDestory()里了 vibrator.cancel();

最后也是在manifest里加入权限：<uses-permission android:name="android.permission.VIBRATE"/>