12、android socket使用demo：网络聊天

目录：

一、效果图

二、原代码分享

三、代码分析

四、总结

一、效果图如下：

客户端1：　　　　　　　　　　　　　　　　　　　　　　　　　　　　客户端2：　　　

         

二、原代码分享如下：

1、java代码只有一个

MainActivity.java

 package com;

 import java.io.BufferedReader;
 import java.io.IOException;
 import java.io.InputStreamReader;
 import java.io.OutputStream;
 import java.io.UnsupportedEncodingException;
 import java.net.ServerSocket;
 import java.net.Socket;
 import java.util.ArrayList;

 import android.app.Activity;
 import android.os.Bundle;
 import android.os.Handler;
 import android.os.Message;
 import android.view.View;
 import android.view.View.OnClickListener;
 import android.widget.Button;
 import android.widget.CheckBox;
 import android.widget.CompoundButton;
 import android.widget.CompoundButton.OnCheckedChangeListener;
 import android.widget.EditText;
 import android.widget.TextView;

 import com.example.androidsockettest.R;

 public class MainActivity extends Activity{

     private Button button_send = null;
     private EditText et_ip = null;
     private EditText et_port = null;
     private EditText et_conent = null;
     private TextView tv_history = null;
     private CheckBox checkBoxSwitch = null;
     private static int defaultPort = 8888;
     public static ArrayList<Socket> socketList=new ArrayList<Socket>();

     private OutputStream out=null;
     private Handler handler = null;
     private Socket s = null;
     String tag = "chatRoom";
     private BufferedReader buRead = null;

     private final int UPDATE_HISTORY_CONTENT = 0;
     private final int UPDATE_INPUT_CONTENT = 1;

     @Override
     protected void onCreate(Bundle savedInstanceState) {
         // TODO Auto-generated method stub
         super.onCreate(savedInstanceState);
         setContentView(R.layout.main_activity);

         init();

         configure();

         serverStart();
     }

     @Override
     protected void onDestroy() {
         // TODO Auto-generated method stub
         super.onDestroy();
     }

     public void init()
     {
         button_send = (Button)findViewById(R.id.button_send);
         et_ip = (EditText)findViewById(R.id.editText_ip);
         et_port = (EditText)findViewById(R.id.EditText_port);
         et_conent = (EditText)findViewById(R.id.EditText_content);
         tv_history = (TextView)findViewById(R.id.textView_history_content);
         checkBoxSwitch = (CheckBox)findViewById(R.id.checkBox_server_start);
     }

     public void configure()
     {
         button_send.setOnClickListener(new OnClickListener() {

             @Override
             public void onClick(View v) {
                 // TODO Auto-generated method stub
                 try {
                     String content = et_conent.getText().toString();//读取用户输入文本

                     if(out == null)
                     {
                         CommonUtils.LogWuwei(tag,"the fucking out is null");
                         return;
                     }

                     out.write((content+"\n").getBytes("utf-8"));//写入socket

                     String history_content = tv_history.getText().toString();
                     history_content+="你说:"+et_conent.getText()+"\n";

                     Message msg = new Message();
                     msg.what = UPDATE_HISTORY_CONTENT;
                     msg.obj = history_content;
                     handler.sendMessage(msg);

                     msg = new Message();
                     msg.what = UPDATE_INPUT_CONTENT;
                     msg.obj = "";
                     handler.sendMessage(msg);

                     CommonUtils.LogWuwei(tag, "send success");
                 } catch (UnsupportedEncodingException e) {
                     // TODO Auto-generated catch block
                     e.printStackTrace();
                     CommonUtils.LogWuwei(tag, "send failed "+e.getMessage());
                 } catch (IOException e) {
                     // TODO Auto-generated catch block
                     e.printStackTrace();
                     CommonUtils.LogWuwei(tag, "send failed "+e.getMessage());
                 }
             }
         });

         checkBoxSwitch.setOnCheckedChangeListener(new OnCheckedChangeListener() {

             @Override
             public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
                 // TODO Auto-generated method stub
                 if(isChecked)
                 {
                     CommonUtils.LogWuwei(tag, "clientStart");
                     clientStart();
                 }
                 else
                 {
                     CommonUtils.LogWuwei(tag, "clientStop");
                     clientStop();
                 }
             }
         });

         handler = new Handler()
         {
             @Override
             public void handleMessage(Message msg) {
                 // TODO Auto-generated method stub
                 super.handleMessage(msg);
                 switch (msg.what)
                 {
                 case UPDATE_HISTORY_CONTENT:
                     CommonUtils.LogWuwei(tag, "更新历史记录"+msg.obj);
                     tv_history.setText((String)msg.obj);
                     break;

                 case UPDATE_INPUT_CONTENT:
                     CommonUtils.LogWuwei(tag, "清空输入记录");
                     et_conent.setText("");//清空文本
                     break;
                 }
             }
         };

     }

     public void serverStart()
     {
         try {

             final ServerSocket ss = new ServerSocket(defaultPort);

             CommonUtils.LogWuwei(tag, "on serverStart");

             new Thread()
             {
                 public void run()
                 {
                     while(true)
                     {
                         try {
                             CommonUtils.LogWuwei(tag, "on serverStart: ready to accept");
                             s=ss.accept();
                             socketList.add(s);
                             buRead = new BufferedReader(new InputStreamReader(s.getInputStream(), "utf-8"));

                             String receive_content = null;
                             while ((receive_content=readFromClient())!=null) {
                                 CommonUtils.LogWuwei(tag,"客户端说："+receive_content);

                                 String history_content = tv_history.getText().toString();
                                 history_content+=s.getInetAddress()+"说:"+receive_content+"\n";

                                 Message msg = new Message();
                                 msg.what = UPDATE_HISTORY_CONTENT;
                                 msg.obj = history_content;
                                 handler.sendMessage(msg);

                                 for (Socket ss:socketList)
                                 {
                                     OutputStream out=ss.getOutputStream();
                                     out.write(("[服务器已经收到消息]"+"\n").getBytes("utf-8"));
                                 }
                             }

                         } catch (UnsupportedEncodingException e) {
                             // TODO Auto-generated catch block
                             e.printStackTrace();
                         } catch (IOException e) {
                             // TODO Auto-generated catch block
                             e.printStackTrace();
                         }

                     }
                 }
             }.start();

         } catch (IOException e) {
             // TODO Auto-generated catch block
             e.printStackTrace();
         }

     }

     private String readFromClient(){
         try {
             return buRead.readLine();
         } catch (Exception e) {
             //删除此Socket
             socketList.remove(s);
         }
         return null;
     }

     public void clientStart()
     {
         new Thread(new Runnable() {

                 @Override
                 public void run() {
                     try {
                         String ip = et_ip.getText().toString();
                         String port = et_port.getText().toString();

                         if(!port.equals("") && port != null)
                         {
                             s=new Socket(ip, defaultPort);
                         }
                         else
                         {
                             s=new Socket(ip, Integer.parseInt(port));
                         }

                         out=s.getOutputStream();
                         CommonUtils.LogWuwei(tag, "clientStart success");

                     } catch (IOException e) {
                         e.printStackTrace();
                         CommonUtils.LogWuwei(tag, "clientStart failed "+e.getMessage());
                     }
                 }
             }).start();

     }

     public void clientStop()
     {
         try {
             if(s != null)
                 s.close();
             if(out != null)
                 out.close();

         } catch (IOException e) {
             // TODO Auto-generated catch block
             e.printStackTrace();
         }

     }

 }

2、xml文件也是只有一个

main_activity.xml

 <?xml version="1.0" encoding="utf-8"?>
 <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
     android:layout_width="match_parent"
     android:layout_height="match_parent" >

                   <EditText
                     android:id="@+id/editText_ip"
                     android:layout_width="wrap_content"
                     android:layout_height="wrap_content"
                     android:layout_toRightOf="@+id/TextView_ip_tips"
                     android:layout_marginRight="15dp"
                     android:text="192.168.1.232"
                     android:ems="10"/>

                 <TextView
                     android:id="@+id/TextView_ip_tips"
                     android:layout_width="wrap_content"
                     android:layout_height="wrap_content"
                     android:layout_alignParentLeft="true"
                     android:layout_marginTop="16dp"
                     android:text="接受IP:" />

                 <EditText
                     android:id="@+id/EditText_port"
                     android:layout_width="wrap_content"
                     android:layout_height="wrap_content"
                     android:layout_toRightOf="@+id/textView_port_tips"
                     android:layout_below="@+id/editText_ip"
                     android:layout_marginTop="16dp"
                     android:ems="10"
                     android:text="8888"
                     android:inputType="number" >

                     <requestFocus />
                 </EditText>

                 <TextView
                     android:id="@+id/textView_port_tips"
                     android:layout_width="wrap_content"
                     android:layout_height="wrap_content"
                     android:layout_alignBottom="@+id/EditText_port"
                     android:layout_alignParentLeft="true"
                     android:text="输入端口号:" />

                 <TextView
                     android:id="@+id/textView_history_content"
                     android:layout_width="match_parent"
                     android:layout_height="350dp"
                     android:layout_below="@+id/checkBox_server_start" /> 

                 <Button
                     android:id="@+id/button_send"
                     android:layout_width="wrap_content"
                     android:layout_height="wrap_content"
                     android:layout_toRightOf="@+id/EditText_content"
                     android:layout_alignParentBottom="true"
                     android:text="发送" />

                 <EditText
                     android:id="@+id/EditText_content"
                     android:layout_width="wrap_content"
                     android:layout_height="wrap_content"
                     android:layout_alignParentLeft="true"
                     android:layout_alignParentBottom="true"
                     android:ems="10" />

                 <CheckBox
                     android:id="@+id/checkBox_server_start"
                     android:layout_width="wrap_content"
                     android:layout_height="wrap_content"
                     android:layout_alignParentLeft="true"
                     android:layout_below="@+id/EditText_port"
                     android:layout_marginLeft="24dp"
                     android:checked="false"
                     android:text="开启发送模式" />

 </RelativeLayout>

三、代码分析

流程分析：

1、服务端

程序开启的时候，执行serverStart（）方法，将自身做为serverSocket，端口号为8888，做为socket的服务器跑起来；

在循环中，通过带有阻塞特性的accept函数等待连接，如果有连接，通过accept函数得到套接字s，然后通过s的getInputStream()方法得到输入流（也就是对方发送的内容），同事也从s的getInetAddress方法得到对方的ip地址；这样一来就读到了两个重要信息 ① ip地址  ②发送过来的内容

2、客户端

在通过设置edittext内容，配置得到对方的IP地址和端口号，如果选中"开启发送模式"，然后创建套件字s，通过套接字的getOutputStream（）方法得到可写流out；

“发送”按钮的回调函数是用来通过可写流-写入-套接字（写入内容为用户输入的文本）

这样一来，程序基本ok了，然后运行在两部手机上，即可实现基于socket的网络聊天。

四、总结

参考连接：

1、 http://mobile.51cto.com/android-386691.htm

2、http://blog.csdn.net/conowen/article/details/7313671

3、http://www.cnblogs.com/harrisonpc/archive/2011/03/31/2001565.html

socket简单通信的几个关键点：

1、如果要实现接受消息功能，需要本身做为服务端跑起来，同时得到可读流。关键点：serverSocket、getIputStream

2、如果要实现消息发送功能，需要本身创建套接字，并得到可写流，同时设置要发送到的ip和端口号。关键点：socket、getOutputStream、对方IP、对方Port

That's All

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