try{
        if ("WebSocket" in window) {   //判断浏览器是否支持WebSocket
            socket = new WebSocket("ws://localhost:13458/Socket/SocketHandler.ashx"); //socket连接服务端地址
        }
    }
    catch(ex)
    {
        log("您的浏览器不支持WebSocket，请切换到更高版本 或用chrome firefox");
        return;
    }

    //相应的socket事件 
    //socket建立连接
    socket.onopen = function () {
        //连接成功，将消息广播出去
        isSocketConnect = true;
        $("#btnWs").val("断开");
        sendSocketMessage(Event,"进入聊天室");
    }
    //socket得到服务端广播的消息
    socket.onmessage = function (event) {
        Log(event.data);
    }
    //socket连接关闭
    socket.onclose = function () {
        Log("socket closed!");
    }
    //socket连接出现错误
    socket.onerror = function (event) {
        Log("socket connect error");
    }

if (socket.readyState == WebSocket.OPEN) {
        if ($("#txtMsg").val() == "") {
            if (!msg) {
                return; //空文本不发送消息
            }
        }
        //如果未输入用户名，根据当前时间生成游客昵称
        if ($("#userName").val() == "") {
            var d = new Date();
            $("#userName").val("游客" + d.getMinutes() + "_" + d.getSeconds() + "_" + d.getMilliseconds());
        }
        if (!msg) {
            msg = "" + $("#userName").val() + "：" + "<div class='divChat'>" + $("#txtMsg").val() + "</div>";
        }
        else {
            msg = "" + $("#userName").val() + " " + msg;
        }
        socket.send(msg);
        $("#txtMsg").val(""); //清空已输入的数据
        $("#txtMsg").focus();
    }

    public class SocketHandler : IHttpHandler
    {
        //用来存储当前所有连接的客户单 
        public static List<WebSocket> WebSocketList;
        public void ProcessRequest(HttpContext context)
        {
            if (WebSocketList == null)
            {
                WebSocketList = new List<WebSocket>();
            }
            HttpContext.Current.AcceptWebSocketRequest(async (contexts) =>
            {
                WebSocket socket = contexts.WebSocket;
                while (true)
                {
                    ArraySegment<byte> buffer = new ArraySegment<byte>(new byte[1024]);
                    CancellationToken token;
                    WebSocketReceiveResult result = await socket.ReceiveAsync(buffer, token);
                    //获取客户端发过来的消息
                    string clientMessage = Encoding.UTF8.GetString(buffer.Array, 0, result.Count);

                    if (socket.State == WebSocketState.Open)
                    {
                        //重新组织消息，发送给客户端
                        clientMessage = DateTime.Now.ToString() + "           " + clientMessage;
                        buffer = new ArraySegment<byte>(Encoding.UTF8.GetBytes(clientMessage));
                        //如果该客户端为初次加入，添加到用户列表;
                        if (!WebSocketList.Contains(socket))
                        {
                            WebSocketList.Add(socket);
                        }
                        //将消息进行广播
                        foreach (WebSocket item in WebSocketList)
                        {
                            await item.SendAsync(buffer, WebSocketMessageType.Text, true, CancellationToken.None);
                        }
                    }
                    if (socket.State == WebSocketState.CloseReceived)
                    {
                        //客户断开的时候，要从列表中移除
                        WebSocketList.Remove(socket);
                    }
                }
            });
        }

 1 package com.bgxt.datatimepickerdemo;
 2 
 3 import android.app.Activity;
 4 import android.os.Bundle;
 5 import android.os.Handler;
 6 import android.view.View;
 7 import android.widget.Button;
 8 import android.widget.TextView;
 9 
10 public class HandlerPostActivity1 extends Activity {
11     private Button btnMes1,btnMes2;
12     private TextView tvMessage;
13     // 声明一个Handler对象
14     private static Handler handler=new Handler();
15     
16     @Override
17     protected void onCreate(Bundle savedInstanceState) {
18         super.onCreate(savedInstanceState);
19         setContentView(R.layout.message_activity);        
20         
21         btnMes1=(Button)findViewById(R.id.btnMes1);
22         btnMes2=(Button)findViewById(R.id.btnMes2);
23         tvMessage=(TextView)findViewById(R.id.tvMessage);
24         btnMes1.setOnClickListener(new View.OnClickListener() {
25             
26             @Override
27             public void onClick(View v) {
28                 // 新启动一个子线程
29                 new Thread(new Runnable() {                    
30                     @Override
31                     public void run() {
32                         // tvMessage.setText("...");
33                         // 以上操作会报错，无法再子线程中访问UI组件，UI组件的属性必须在UI线程中访问
34                         // 使用post方式修改UI组件tvMessage的Text属性
35                         handler.post(new Runnable() {                    
36                             @Override
37                             public void run() {
38                                 tvMessage.setText("使用Handler.post在工作线程中发送一段执行到消息队列中，在主线程中执行。");                        
39                             }
40                         });                                
41                     }
42                 }).start();
43             }
44         });
45         
46         btnMes2.setOnClickListener(new View.OnClickListener() {
47             
48             @Override
49             public void onClick(View v) {
50                 new Thread(new Runnable() {                    
51                     @Override
52                     public void run() {
53                         // 使用postDelayed方式修改UI组件tvMessage的Text属性值
54                         // 并且延迟3S执行
55                         handler.postDelayed(new Runnable() {
56                             
57                             @Override
58                             public void run() {
59                                 tvMessage.setText("使用Handler.postDelayed在工作线程中发送一段执行到消息队列中，在主线程中延迟3S执行。");    
60                                 
61                             }
62                         }, 3000);                        
63                     }
64                 }).start();
65                 
66             }
67         });
68     }
69 }

 1 package com.bgxt.datatimepickerdemo;
 2 
 3 import org.apache.http.HttpResponse;
 4 import org.apache.http.client.HttpClient;
 5 import org.apache.http.client.methods.HttpGet;
 6 import org.apache.http.impl.client.DefaultHttpClient;
 7 import org.apache.http.util.EntityUtils;
 8 
 9 import android.app.Activity;
10 import android.app.ProgressDialog;
11 import android.graphics.Bitmap;
12 import android.graphics.BitmapFactory;
13 import android.os.Bundle;
14 import android.os.Handler;
15 import android.view.View;
16 import android.widget.Button;
17 import android.widget.ImageView;
18 
19 public class HandlerPostActivity2 extends Activity {
20     private Button btnDown;
21     private ImageView ivImage;
22     private static String image_path = "http://ww4.sinaimg.cn/bmiddle/786013a5jw1e7akotp4bcj20c80i3aao.jpg";
23     private ProgressDialog dialog;
24     // 一个静态的Handler，Handler建议声明为静态的
25     private static  Handler handler=new Handler();
26     @Override
27     protected void onCreate(Bundle savedInstanceState) {
28         super.onCreate(savedInstanceState);
29         setContentView(R.layout.asynctask_activity);
30         
31         btnDown = (Button) findViewById(R.id.btnDown);
32         ivImage = (ImageView) findViewById(R.id.ivSinaImage);
33 
34         dialog = new ProgressDialog(this);
35         dialog.setTitle("提示");
36         dialog.setMessage("正在下载，请稍后...");
37         dialog.setCancelable(false);
38         
39         btnDown.setOnClickListener(new View.OnClickListener() {            
40             @Override
41             public void onClick(View v) {
42                 // 开启一个子线程，用于下载图片
43                 new Thread(new MyThread()).start();
44                 // 显示对话框
45                 dialog.show();
46             }
47         });
48     }
49     
50     public class MyThread implements Runnable {
51 
52         @Override
53         public void run() {
54             // 下载一个图片
55             HttpClient httpClient = new DefaultHttpClient();
56             HttpGet httpGet = new HttpGet(image_path);
57             HttpResponse httpResponse = null;
58             try {
59                 httpResponse = httpClient.execute(httpGet);
60                 if (httpResponse.getStatusLine().getStatusCode() == 200) {
61                     byte[] data = EntityUtils.toByteArray(httpResponse
62                             .getEntity());
63                     // 得到一个Bitmap对象，并且为了使其在post内部可以访问，必须声明为final
64                     final Bitmap bmp=BitmapFactory.decodeByteArray(data, 0, data.length);
65                     handler.post(new Runnable() {                        
66                         @Override
67                         public void run() {
68                             // 在Post中操作UI组件ImageView
69                             ivImage.setImageBitmap(bmp);
70                         }
71                     });
72                     // 隐藏对话框
73                     dialog.dismiss();
74                 }
75             } catch (Exception e) {
76                 e.printStackTrace();
77             }
78         }
79 
80     }
81 }

 1 package com.bgxt.datatimepickerdemo;
 2 
 3 import org.apache.http.HttpResponse;
 4 import org.apache.http.client.HttpClient;
 5 import org.apache.http.client.methods.HttpGet;
 6 import org.apache.http.impl.client.DefaultHttpClient;
 7 import org.apache.http.util.EntityUtils;
 8 
 9 import android.app.Activity;
10 import android.app.ProgressDialog;
11 import android.graphics.Bitmap;
12 import android.graphics.BitmapFactory;
13 import android.os.Bundle;
14 import android.os.Handler;
15 import android.os.Message;
16 import android.view.View;
17 import android.widget.Button;
18 import android.widget.ImageView;
19 
20 public class HandlerMessageActivity1 extends Activity {
21     private Button btnDown;
22     private ImageView ivImage;
23     private static String image_path = "http://ww4.sinaimg.cn/bmiddle/786013a5jw1e7akotp4bcj20c80i3aao.jpg";
24     private ProgressDialog dialog;
25     private static int IS_FINISH = 1;
26 
27     @Override
28     protected void onCreate(Bundle savedInstanceState) {
29         super.onCreate(savedInstanceState);
30         setContentView(R.layout.asynctask_activity);
31 
32         btnDown = (Button) findViewById(R.id.btnDown);
33         ivImage = (ImageView) findViewById(R.id.ivSinaImage);
34 
35         dialog = new ProgressDialog(this);
36         dialog.setTitle("提示信息");
37         dialog.setMessage("正在下载，请稍后...");
38         dialog.setCancelable(false);
39 
40         btnDown.setOnClickListener(new View.OnClickListener() {
41             @Override
42             public void onClick(View v) {
43                     new Thread(new MyThread()).start();
44                     dialog.show();
45             }
46         });
47     }
48 
49     private  Handler handler = new Handler() {
50         // 在Handler中获取消息，重写handleMessage()方法
51         @Override
52         public void handleMessage(Message msg) {            
53             // 判断消息码是否为1
54             if(msg.what==IS_FINISH){
55                 byte[] data=(byte[])msg.obj;
56                 Bitmap bmp=BitmapFactory.decodeByteArray(data, 0, data.length);
57                 ivImage.setImageBitmap(bmp);
58                 dialog.dismiss();
59             }
60         }
61     };
62 
63     public class MyThread implements Runnable {
64 
65         @Override
66         public void run() {
67             HttpClient httpClient = new DefaultHttpClient();
68             HttpGet httpGet = new HttpGet(image_path);
69             HttpResponse httpResponse = null;
70             try {
71                 httpResponse = httpClient.execute(httpGet);
72                 if (httpResponse.getStatusLine().getStatusCode() == 200) {
73                     byte[] data = EntityUtils.toByteArray(httpResponse
74                             .getEntity());
75                     // 获取一个Message对象，设置what为1
76                     Message msg = Message.obtain();
77                     msg.obj = data;
78                     msg.what = IS_FINISH;
79                     // 发送这个消息到消息队列中
80                     handler.sendMessage(msg);
81                 }
82             } catch (Exception e) {
83                 e.printStackTrace();
84             }
85         }
86     }
87 }

  1 package com.bgxt.datatimepickerdemo;
  2 
  3 import android.app.Activity;
  4 import android.os.Bundle;
  5 import android.os.Handler;
  6 import android.os.Message;
  7 import android.view.View;
  8 import android.widget.Button;
  9 import android.widget.TextView;
 10 
 11 public class HandlerMessageActivity2 extends Activity {
 12     private Button btn1, btn2, btn3, btn4,btn5;
 13     private static TextView tvMes;
 14     private static Handler handler = new Handler() {
 15         @Override
 16         public void handleMessage(android.os.Message msg) {
 17             if (msg.what == 3||msg.what==5) {
 18                 tvMes.setText("what=" + msg.what + "，这是一个空消息");
 19             } else {
 20                 tvMes.setText("what=" + msg.what + "," + msg.obj.toString());
 21             }
 22 
 23         };
 24     };
 25 
 26     @Override
 27     protected void onCreate(Bundle savedInstanceState) {
 28         // TODO Auto-generated method stub
 29         super.onCreate(savedInstanceState);
 30         setContentView(R.layout.message_activity2);
 31         tvMes = (TextView) findViewById(R.id.tvMes);
 32         btn1 = (Button) findViewById(R.id.btnMessage1);
 33         btn2 = (Button) findViewById(R.id.btnMessage2);
 34         btn3 = (Button) findViewById(R.id.btnMessage3);
 35         btn4 = (Button) findViewById(R.id.btnMessage4);
 36         btn5 = (Button) findViewById(R.id.btnMessage5);
 37 
 38         btn1.setOnClickListener(new View.OnClickListener() {
 39             @Override
 40             public void onClick(View v) {
 41                 // 使用Message.Obtain+Hander.sendMessage()发送消息
 42                 new Thread(new Runnable() {
 43                     @Override
 44                     public void run() {
 45                         Message msg = Message.obtain();
 46                         msg.what = 1;
 47                         msg.obj = "使用Message.Obtain+Hander.sendMessage()发送消息";
 48                         handler.sendMessage(msg);
 49                     }
 50                 }).start();
 51             }
 52         });
 53 
 54         btn2.setOnClickListener(new View.OnClickListener() {
 55 
 56             @Override
 57             public void onClick(View v) {
 58                 // 使用Message.sendToTarget发送消息
 59                 new Thread(new Runnable() {
 60                     @Override
 61                     public void run() {
 62                         Message msg = Message.obtain(handler);
 63                         msg.what = 2;
 64                         msg.obj = "使用Message.sendToTarget发送消息";
 65                         msg.sendToTarget();
 66                     }
 67                 }).start();
 68             }
 69         });
 70 
 71         btn3.setOnClickListener(new View.OnClickListener() {
 72             // 发送一个延迟消息
 73             @Override
 74             public void onClick(View v) {
 75                 new Thread(new Runnable() {
 76                     @Override
 77                     public void run() {
 78                         handler.sendEmptyMessage(3);
 79                     }
 80                 }).start();
 81             }
 82         });
 83 
 84         btn4.setOnClickListener(new View.OnClickListener() {
 85 
 86             @Override
 87             public void onClick(View v) {
 88                 new Thread(new Runnable() {
 89                     @Override
 90                     public void run() {
 91                         Message msg = Message.obtain();
 92                         msg.what =4;
 93                         msg.obj = "使用Message.Obtain+Hander.sendMessage()发送延迟消息";
 94                         handler.sendMessageDelayed(msg, 3000);
 95                     }
 96                 }).start();
 97             }
 98         });
 99         
100         btn5.setOnClickListener(new View.OnClickListener() {
101             // 发送一个延迟的空消息
102             @Override
103             public void onClick(View v) {
104                 new Thread(new Runnable() {
105                     @Override
106                     public void run() {
107                         handler.sendEmptyMessageDelayed(5, 3000);
108                     }
109                 }).start();
110             }
111         });
112     }
113 }