Android 基于Socket的聊天室

http://www.cnblogs.com/-run/archive/2011/12/29/2306363.html

Socket是TCP/IP协议上的一种通信，在通信的两端各建立一个Socket，从而在通信的两端之间形成网络虚拟链路。一旦建立了虚拟的网络链路，两端的程序就可以通过虚拟链路进行通信。

 

Client A  发信息给 Client B ,  A的信息首先发送信息到服务器Server ，Server接受到信息后再把A的信息广播发送给所有的Clients

首先我们要在服务器建立一个ServerSocket ，ServerSocket对象用于监听来自客户端的Socket连接，如果没有连接，它将一直处于等待状态。

Socket accept()：如果接收到一个客户端Socket的连接请求，该方法将返回一个与客户端Socket对应的Socket

Server示例：

//创建一个ServerSocket，用于监听客户端Socket的连接请求ServerSocket ss = new ServerSocket(30000);//采用循环不断接受来自客户端的请求while (true){//每当接受到客户端Socket的请求，服务器端也对应产生一个SocketSocket s = ss.accept();//下面就可以使用Socket进行通信了...}

 

客户端通常可使用Socket的构造器来连接到指定服务器
Client示例:

//创建连接到服务器、30000端口的SocketSocket s = new Socket("192.168.2.214" , 30000);//下面就可以使用Socket进行通信了...

这样Server和Client就可以进行一个简单的通信了
当然，我们要做的是多客户，所以每当客户端Socket连接到该ServerSocket之后，程序将对应Socket加入clients集合中保存，并为该Socket启动一条线程，该线程负责处理该Socket所有的通信任务

//定义保存所有Socket的ArrayListpublic static ArrayList<Socket> clients = new ArrayList<Socket>();

当服务器线程读到客户端数据之后，程序遍历clients集合，并将该数据向clients集合中的每个Socket发送一次。这样就可以实现一个聊天室的功能了

 

 

下面来看看整个功能的demo

先建立一个Java工程，把Server.java运行起来，然后再运行手机模拟器

 

  

服务器打印信息：

 

程序文件结构：

嘿嘿，大家别笑我，我的JAVA水平还是初学者，很多地方都觉得很菜，代码规格程度：小学。 有待提高啊!

 

1.先看看主Activity : SocketmsgActivity.java

  1 public class SocketmsgActivity extends Activity {  2     /** Called when the activity is first created. */  3     private SQLiteDatabase db;  4       5     Thread thread = null;  6     Socket s = null;  7     private InetSocketAddress isa = null;   8   9     DataInputStream dis = null; 10     DataOutputStream dos = null; 11     private String reMsg=null; 12     private Boolean isContect = false; 13     private EditText chattxt; 14     private EditText chatbox; 15     private Button chatok; 16      17     private String chatKey="SLEEKNETGEOCK4stsjeS"; 18     private String name=null,ip=null,port=null; 19     @Override 20     public void onCreate(Bundle savedInstanceState) { 21         super.onCreate(savedInstanceState); 22         setContentView(R.layout.main); 23         chattxt = (EditText)findViewById(R.id.chattxt); 24         chatbox = (EditText)findViewById(R.id.chatbox); 25         chatok = (Button)findViewById(R.id.chatOk); 26         chatbox.setCursorVisible(false); 27         chatbox.setFocusable(false); 28         chatbox.setFocusableInTouchMode(false); 29         chatbox.setGravity(2); 30          31         //初始化，创建数据库来储存用户信息 32         InitDatabase(); 33         db = SQLiteDatabase.openOrCreateDatabase(config.f, null); 34         try { 35             Cursor cursor = db.query("config", new String[]{"ip","name","port"},null,null, null, null, null); 36             while(cursor.moveToNext()){ 37                 name = cursor.getString(cursor.getColumnIndex("name")); 38                 ip = cursor.getString(cursor.getColumnIndex("ip")); 39                 port = cursor.getString(cursor.getColumnIndex("port")); 40             } 41             cursor.close(); 42         } catch (Exception e) { 43             // TODO: handle exception 44             System.out.println(e.toString()); 45         } 46         db.close(); 47          48         //设置连接 49         if(ip==null || port==null){ 50             Intent intent = new Intent(SocketmsgActivity.this,IniActivity.class); 51             startActivity(intent); 52             SocketmsgActivity.this.finish(); 53         } 54         //设置名称 55         else if(name==null){ 56             Intent intent = new Intent(SocketmsgActivity.this,IniuserActivity.class); 57             startActivity(intent); 58             SocketmsgActivity.this.finish(); 59         }else{ 60              61             connect(); 62             chatok.setOnClickListener(new View.OnClickListener() { 63      64                 @Override 65                 public void onClick(View v) { 66      67                     String str = chattxt.getText().toString().trim(); 68                     System.out.println(s); 69                     try { 70                         dos.writeUTF(chatKey+"name:"+name+"end;"+str); 71                         chattxt.setText(""); 72      73                     }catch (SocketTimeoutException  e) { 74                           System.out.println("連接超時，服務器未開啟或IP錯誤"); 75                           Toast.makeText(SocketmsgActivity.this, "連接超時，服務器未開啟或IP錯誤", Toast.LENGTH_SHORT).show(); 76                           Intent intent = new Intent(SocketmsgActivity.this,IniActivity.class); 77                         startActivity(intent); 78                         SocketmsgActivity.this.finish(); 79                           e.printStackTrace(); 80                       } catch (IOException e) { 81                         // TODO Auto-generated catch block 82                           System.out.println("連接超時，服務器未開啟或IP錯誤"); 83                           Toast.makeText(SocketmsgActivity.this, "連接超時，服務器未開啟或IP錯誤", Toast.LENGTH_SHORT).show(); 84                           Intent intent = new Intent(SocketmsgActivity.this,IniActivity.class); 85                         startActivity(intent); 86                         SocketmsgActivity.this.finish(); 87                           e.printStackTrace(); 88                     } 89                 } 90             }); 91         } 92     } 93      94     private Runnable doThread = new Runnable() { 95         public void run() { 96             System.out.println("running!"); 97             ReceiveMsg(); 98         } 99     };   100     101     public void connect() {102         try {103             s = new Socket();104             isa = new InetSocketAddress(ip,Integer.parseInt(port)); 105             s.connect(isa,5000); 106 107             if(s.isConnected()){108                 dos = new DataOutputStream (s.getOutputStream());109                 dis = new DataInputStream (s.getInputStream());110                 dos.writeUTF(chatKey+"online:"+name);111                 /**112                  * 这里是关键，我在此耗时8h+113                  * 原因是 子线程不能直接更新UI114                  * 为此，我们需要通过Handler物件，通知主线程Ui Thread来更新界面。115                  * 116 */117                 thread = new Thread(null, doThread, "Message");118                   thread.start();119                   System.out.println("connect");120                   isContect=true;121             }122           }catch (UnknownHostException e) {123               System.out.println("連接失敗");124             Toast.makeText(SocketmsgActivity.this, "連接失敗", Toast.LENGTH_SHORT).show();125             Intent intent = new Intent(SocketmsgActivity.this,IniActivity.class);126             startActivity(intent);127             SocketmsgActivity.this.finish();128               e.printStackTrace();129           }catch (SocketTimeoutException  e) {130               System.out.println("連接超時，服務器未開啟或IP錯誤");131               Toast.makeText(SocketmsgActivity.this, "連接超時，服務器未開啟或IP錯誤", Toast.LENGTH_SHORT).show();132             Intent intent = new Intent(SocketmsgActivity.this,IniActivity.class);133             startActivity(intent);134             SocketmsgActivity.this.finish();135               e.printStackTrace();136           }catch (IOException e) {137               System.out.println("連接失敗");138               e.printStackTrace();139           }140     }141    142     public void disConnect() {143         if(dos!=null){144         try {145             146                 dos.writeUTF(chatKey+"offline:"+name);147             148         } catch (IOException e1) {149             // TODO Auto-generated catch block150             e1.printStackTrace();151         }152         try {153             s.close();154         } catch (IOException e) {155               e.printStackTrace();156         }157         }158     }159   160     161     /**162      * 线程监视Server信息163 */164     private void ReceiveMsg() {165         if (isContect) {166             try {167                 while ((reMsg = dis.readUTF()) != null) {168                     System.out.println(reMsg);169                     if (reMsg != null) {170 171                         try {172                             Message msgMessage = new Message();173                             msgMessage.what = 0x1981;174                             handler.sendMessage(msgMessage);175                             Thread.sleep(100);176                         } catch (InterruptedException e) {177                             // TODO Auto-generated catch block178                             e.printStackTrace();179                         }180 181                     }182                 }183             } catch (SocketException e) {184                 // TODO: handle exception185                 System.out.println("exit!");186             } catch (IOException e) {187                 // TODO Auto-generated catch block188                 e.printStackTrace();189             }190 191         }192     }193   194     /**195      * 通过handler更新UI196 */197     Handler handler = new Handler() {198         public void handleMessage(Message msg) {199             switch (msg.what) {200             case 0x1981:201                 chatbox.setText(chatbox.getText() + reMsg + '\n');202                 chatbox.setSelection(chatbox.length());203                 break;204             }205         }206     };207     208     @Override209     protected void onDestroy() {210         // TODO Auto-generated method stub211         super.onDestroy();212         disConnect();213         //System.exit(0);214     }215     216     @Override217     public boolean onCreateOptionsMenu(Menu menu) {218         // TODO Auto-generated method stub219         menu.add(0, 1, 1, "初始化設置");220         menu.add(0, 2, 2, "退出");221         return super.onCreateOptionsMenu(menu);222     }223 224     @Override225     public boolean onOptionsItemSelected(MenuItem item) {226         // TODO Auto-generated method stub227         if(item.getItemId()==1){228             Intent intent = new Intent(SocketmsgActivity.this,IniActivity.class);229             startActivity(intent);230             SocketmsgActivity.this.finish();231         }else if(item.getItemId()==2){232             disConnect();233             SocketmsgActivity.this.finish();  234             android.os.Process.killProcess(android.os.Process.myPid());235             System.exit(0);236         }237         return super.onOptionsItemSelected(item);238     }239 240     public void InitDatabase(){241          242         if(!config.path.exists()){  243             config.path.mkdirs();    244             Log.i("LogDemo", "mkdir");  245         }   246         if(!config.f.exists()){      247             try{   248                 config.f.createNewFile();  249                 Log.i("LogDemo", "create a new database file");250             }catch(IOException e){   251                 Log.i("LogDemo",e.toString());252             }   253         }  254         try {255             if(tabIsExist("config")==false){256                 db = SQLiteDatabase.openOrCreateDatabase(config.f, null);  257                 db.execSQL("create table config(_id integer primary key autoincrement," +258                         "ip varchar(128),port varchar(10),name varchar(32))");259                 Log.i("LogDemo", "create a database");260                 db.close();261             }262         } catch (Exception e) {263             // TODO: handle exception264             Log.i("LogDemo",e.toString());265         }266     }267     268     /**269      * check the database is already exist270      * @param tabName271      * @return272 */273     public boolean tabIsExist(String tabName){274         boolean result = false;275         if(tabName == null){276                 return false;277         }278         Cursor cursor = null;279         db = SQLiteDatabase.openOrCreateDatabase(config.f, null); 280         try {281             String sql = "select count(*) as c from sqlite_master where type ='table' " +282                         "and name ='"+tabName.trim()+"' ";283             cursor = db.rawQuery(sql, null);284             if(cursor.moveToNext()){285                 int count = cursor.getInt(0);286                 if(count>0){287                     result = true;288                 }289             }290                 291         } catch (Exception e) {292                 // TODO: handle exception293         }  294         cursor.close();295         db.close();296         return result;297     }298 }

 

2.初始化IP和端口Activity， IniActivity.java

IniActivity.java

 

3.初始化用户名称Activity， IniuserActivity.java

IniuserActivity.java

 

4.config.java

config.java

 

布局文件：

1.main.xml

main.xml

2.config.xml

config.xml

3.configuer.xml

configuser.xml

 

style文件：dimens.xml

dimens.xml

 

最后是服务器文件：Server.java

  1 import java.io.*;  2 import java.net.*;  3 import java.text.DateFormat;  4 import java.text.SimpleDateFormat;  5 import java.util.*;  6   7 import javax.sound.sampled.Port;  8 import javax.swing.JOptionPane;  9  10 public class Server { 11      12     ServerSocket ss = null; 13     private String getnameString=null; 14     boolean started = false; 15     List<Client> clients = new ArrayList<Client>(); 16     List<Info> infos = new ArrayList<Info>(); 17     public static void main(String[] args) { 18         String inputport = JOptionPane.showInputDialog("請輸入該服務器使用的端口:"); 19         int port = Integer.parseInt(inputport); 20         new Server().start(port); 21     } 22   23     public void start(int port) { 24         try { 25            ss = new ServerSocket(port); 26            System.out.println("服務器啟動"); 27            started = true; 28         } catch (BindException e) { 29               System.out.println(" 端口已经被占用"); 30               System.exit(0); 31            } 32           catch (IOException e) { 33              e.printStackTrace(); 34           } 35  36       try { 37          while (started) { 38              Socket s = ss.accept(); 39              Client c = new Client (s); 40              System.out.println("a client is connected"); 41              new Thread(c).start(); 42              clients.add(c); 43               44               45          } 46       } catch (IOException e) { 47             e.printStackTrace(); 48          } 49          finally { 50             try { 51                ss.close(); 52             } catch (IOException e) { 53                   e.printStackTrace(); 54                } 55          } 56    } 57    public List<Client> getClient(){ 58        return clients; 59    } 60  61   class Client implements Runnable { 62      private String chatKey="SLEEKNETGEOCK4stsjeS"; 63      private Socket s = null; 64      private DataInputStream dis = null; 65      private DataOutputStream dos = null; 66      private boolean bConnected = false; 67      private String sendmsg=null; 68      Client (Socket s) { 69         this.s = s; 70         try { 71           dis = new DataInputStream (s.getInputStream()); 72           dos = new DataOutputStream (s.getOutputStream()); 73           bConnected = true; 74         } catch(IOException e) { 75               e.printStackTrace(); 76            } 77      } 78       79      public void send (String str) { 80           81          try { 82              //System.out.println(s); 83              dos.writeUTF(str+""); 84              dos.flush(); 85          } catch(IOException e) { 86              clients.remove(this); 87              System.out.println("对方已经退出了"); 88          } 89      } 90      public void run() { 91          try { 92             while (bConnected) { 93                 String str = dis.readUTF(); 94                 DateFormat df = new SimpleDateFormat("yyyy-MM-dd hh:mm:ss"); 95                 String date = "  ["+df.format(new Date())+"]"; 96                 if(str.startsWith(chatKey+"online:")){ 97                     Info info = new Info(); 98                     getnameString = str.substring(27); 99                     100                     info.setName(getnameString);101                     infos.add(info);102                     for (int i=0; i<clients.size(); i++) {103                       Client c = clients.get(i);104                       c.send(getnameString+" on line."+date);105                     }106                     System.out.println(getnameString+" on line."+date);107                 }else if(str.startsWith(chatKey+"offline:")){108                     getnameString = str.substring(28);109                     clients.remove(this);110                     for (int i=0; i<clients.size(); i++) {111                           Client c = clients.get(i);112                           c.send(getnameString+" off line."+date);113                         }114                     System.out.println(getnameString+" off line."+date);115                 }116                 else{117                     int charend = str.indexOf("end;");118                     String chatString = str.substring(charend+4);119                     String chatName = str.substring(25, charend);120                     121                     sendmsg=chatName+date+"\n"+chatString; 122                     for (int i=0; i<clients.size(); i++) {123                         Client c = clients.get(i);124                         c.send(sendmsg);125                       }126                     System.out.println(sendmsg);127                 }128              }129          } catch (SocketException e) {130              System.out.println("client is closed!");131              clients.remove(this);132          } catch (EOFException e) {133                System.out.println("client is closed!");134                clients.remove(this);135             }136             catch (IOException e) {137                e.printStackTrace();138             }139            finally {140              try {141                if (dis != null) dis.close();142                if (dos != null) dos.close();143                if (s != null) s.close();144              } catch (IOException e) {145                    e.printStackTrace();146                }147            }148      }149   }150   151   class Info{152       private String info_name = null;153       public Info(){154           155       }156       public void setName(String name){157           info_name = name;158       }159       public String getName(){160           return info_name;161       }162   }163 }

 

以上只是一个粗略的聊天室功能，如果要实现私聊，还需要保存该Socket关联的客户信息。一个客户端可以将信息发送另一个指定客户端。实际上，我们知道所有客户端只与服务器连接，客户端之间并没有互相连接。这个功能等我以后有时间再写个demo.....