Android即时通信设计与实现(代码)

Android即时通信系统设计与实现（代码如下）：1，登录界面（IP地址）：

package https://www.360docs.net/doc/4114823104.html,Nclient;

import android.app.Activity;

import android.content.Intent;

import android.os.Bundle;

import android.view.View;

import android.view.View.OnClickListener;

import android.widget.Button;

import android.widget.EditT ext;

public class LoginActivity extends Activity {

/** Called when the activity is first created. */

@Override

public void onCreate(Bundle savedInstanceState)

{

super.onCreate(savedInstanceState);

setContentView(https://www.360docs.net/doc/4114823104.html,yout.login);

Button btnLink = (Button) findViewById(R.id.btnLink);

final EditT ext etIPaddr = (EditT ext) findViewById(R.id.etIPaddr);

final Intent intent = new Intent();

btnLink.setOnClickListener(new OnClickListener() {

@Override

public void onClick(View v)

{

intent.setClass(LoginActivity.this, ClientActivity.class);

//清除堆栈中其他Activity

intent.putExtra("IPaddr", etIPaddr.getT ext().toString());

intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);

LoginActivity.this.finish();

startActivity(intent);

}

});

}

}

2，客户端（Android）：

package https://www.360docs.net/doc/4114823104.html,Nclient;

// 123456

import java.io.BufferedReader;

import java.io.IOException;

import java.io.InputStream;

import java.io.InputStreamReader;

import java.io.OutputStream;

import java.io.PrintStream;

import https://www.360docs.net/doc/4114823104.html,.Socket;

import https://www.360docs.net/doc/4114823104.html,.UnknownHostException;

import java.util.Date;

import android.app.Activity;

import android.content.Intent;

import android.os.Bundle;

import android.os.Handler;

import android.os.Looper;

import android.os.Message;

import android.view.View;

import android.view.View.OnClickListener; import android.widget.Button;

import android.widget.EditT ext;

import android.widget.T oast;

public class ClientActivity extends Activity {

Socket socket;

BufferedReader br;

PrintStream ps;

Button btnSend;

Button btnExit;

Button btnFile;

EditT ext etSend;

EditT ext etReceive;

MyHandler handle;

@Override

public void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(https://www.360docs.net/doc/4114823104.html,yout.client);

Intent intent = getIntent();

String IPaddr = new String(intent.getStringExtra("IPaddr"));

etReceive = (EditT ext) findViewById(R.id.etReceive);

etSend = (EditT ext) findViewById(R.id.etSend);

btnSend = (Button) findViewById(R.id.btnSend);

btnExit = (Button) findViewById(R.id.btnExit);

btnFile=(Button)findViewById(R.id.btnFile);

try

{

socket = new Socket(IPaddr, 9998);

if (socket != null)

T oast.makeT ext(ClientActivity.this, "成功连接到服务端", T oast.LENGTH_LONG)

.show();

// 创建输入流

InputStream ins = socket.getInputStream();

InputStreamReader isr = new InputStreamReader(ins, "gbk");

br = new BufferedReader(isr);

// 创建输出流

OutputStream os = socket.getOutputStream();

ps = new PrintStream(os);

btnSend.setOnClickListener(new RcbtnOnclickListener());

handle = new MyHandler();

new Thread(new Receive()).start();

// handle.post(new Receive());

} catch (UnknownHostException e)

{

e.printStackT race();

} catch (IOException e)

{

e.printStackT race();

}

btnFile.setOnClickListener(new OnClickListener() {

public void onClick(View v)// 为文件按钮注册按钮监听

{

System.out.println("benfile");

}

});

btnExit.setOnClickListener(new OnClickListener() {

public void onClick(View v)// 为退出按钮注册按钮监听

{

System.exit(0);// 此方法可以结束线程，但无法完全退出

// ClientActivity.this.finish();//此方法无法结束线程

// android.os.Process.killProcess(android.os.Process.myPid());

// 此方法可以结束线程，但也无法也完全退出

}

});

// etReceive.setOnKeyListener(new )

}

// 发送消息按钮监听

class RcbtnOnclickListener implements OnClickListener {

@Override

public void onClick(View v)

{

Date now = new Date();

String time = timeFormat(now.getHours()) + ":"

+ timeFormat(now.getMinutes()) + ":" + timeFormat(now.getSeconds());

String message = etSend.getT ext().toS tring();

if (!(message.equals("")))

{

message = time + " : " + message;

etReceive.append("<<< " + message + "\n");

ps.println(message);

ps.flush();

etSend.setT ext("");

T oast.makeT ext(ClientActivity.this, "消息已发送", T oast.LENGTH_LONG).show();

}

else T oast.makeT ext(ClientActivity.this, "消息为空", T oast.LENGTH_LONG).show();

}

}

// 定义消息处理方法

class MyHandler extends Handler {

public MyHandler()

{

}

public MyHandler(Looper L)

{

super(L);

}

// 子类必须重写此方法,接受数据

@Override

public void handleMessage(Message msg)

{

super.handleMessage(msg);

Bundle b = msg.getData();

String receive = b.getString("receive");

if (!(receive.equals(""))) etReceive.append(">>> " + receive + "\n");

// else etReceive.append(" ");

}

}

// 创建发送按键的监听器

class Receive implements Runnable {

@Override

public void run()

{

String receive = "";

try

{

if (br.ready())

try

{

receive = new String(br.readLine());

} catch (IOException e)

{

receive = "服务端已停止，请退出";

}

} catch (IOException e)

{

receive = "服务端已停止，请退出";

}

Message msg = new Message();

Bundle b = new Bundle();

b.putString("receive", receive);

// b.putString("receive", "刷新");

msg.setData(b);

ClientActivity.this.handle.handleMessage(msg);

handle.postDelayed(new Receive(), 300);

}

}

//发送文件按钮监听

/*----------

* -----------

* -----------

class btnFileListener implements OnClickListener{

@Override

public void onClick(View v) {

// TODO Auto-generated method stub

System.out.println("发送文件监听");

}

}*/

/* ==========转换时间格式========== */ public String timeFormat(int time)

{

if (time < 10) return "0" + time;

else return "" + time;

}

}

3，服务端（Java）：

package server;

import java.awt.*;

import java.awt.event.*;

import javax.swing.JFrame;

import java.io.*;

import https://www.360docs.net/doc/4114823104.html,.ServerSocket;

import https://www.360docs.net/doc/4114823104.html,.Socket;

import java.util.Date;

import javax.swing.*;

public class Server extends JFrame implements ActionListener {

private static final long serialV ersionUID = 1L;

JPanel panel1 = new JPanel();

JPanel panel2 = new JPanel();

JPanel panel3 = new JPanel();

JButton btnSend = new JButton("发送");

JButton btnExit = new JButton("退出");

T extArea taSend = new T extArea("", 4, 58, T extArea.SCROLLBARS_NONE); T extArea taReceive = new T extArea("", 15, 58,

T extArea.SCROLLBARS_VERTICAL_ONLY);

ServerSocket ss = null;

Socket socket = new Socket();

BufferedReader br;

PrintStream ps;

public static void main(S tring args[])

{

new Server();

}

public Server()

{

btnSend.addActionListener(this);

btnExit.addActionListener(this);

btnSend.setMnemonic('1');

btnExit.setMnemonic('2');

btnSend.setFocusable(false);

btnExit.setFocusable(false);

setTitle("服务端");

setLayout(new FlowLayout());

setSize(450, 420);

setResizable(false);

panel1.add(taReceive);

panel2.add(taSend);

panel3.add(btnSend, BorderLayout.WEST);

panel3.add(btnExit, BorderLayout.EAST);

// taReceive.setSize(590, 320);

// taSend.setSize(590, 150);

// taReceive.setEnabled(false);

taReceive.setFocusable(false);

taSend.setEnabled(true);

add(panel1, BorderLayout.NORTH);

add(panel2, BorderLayout.SOUTH);

add(panel3);

// 关闭窗口事件的监听及处理

this.addWindowListener(new WindowAdapter() {

public void windowClosing(WindowEvent e)

{

System.exit(0);

}

});

setBackground(Color.GRAY);

setLocation(300, 120);

setVisible(true);

while (true)

{

try

{

if ((ss = new ServerSocket(9998)) != null)

{

// taReceive.append("系统提示：已打开监听端口\n");

break;

}

} catch (IOException e)

{

e.printStackT race();

}

}

while (true)

{

try

{

if ((socket = ss.accept()) != null)

{

taReceive.append("系统提示：客户端已连接\n");

// 创建输入流

InputStream ins = socket.getInputStream();

InputStreamReader isr = new InputStreamReader(ins, "utf-8");

// 此处注意一定要加上解码方式，否则汉字会出现乱码

// 可用System.getProperty("file.encoding")方法获得默认编码方式br = new BufferedReader(isr);

// 创建输出流

OutputStream os = socket.getOutputStream();

ps = new PrintStream(os);

break;

}

} catch (IOException e)

{

e.printStackT race();

}

}

String receive = null;

try

{

while (true)

{

try

{

receive = br.readLine();

} catch (IOException ex)

{

ex.printStackT race();

}

// receive = new String(receive.getBytes("gb2312"));

if (!(receive.equals(""))) taReceive.append(">>>> " + receive + "\n");

}

} catch (Exception ie)

{

System.out.println("客户端已断开");

try

{

for (int i = 3; i > 0; i--)

{

taReceive.append("客户端已断开连接," + i + "秒后自动退出\n");

Thread.sleep(1000);

}

System.exit(0);

} catch (InterruptedException e)

{

e.printStackT race();

}

}

}

@Override

public void actionPerformed(ActionEvent e)

{

if (e.getActionCommand() == "退出")

{

System.out.print("服务端已停止");

dispose();

System.exit(0);

} else this.sendMessage(taSend.getT ext().toString());

}

@SuppressWarnings("deprecation")

private void sendMessage(String message)

{

Date now = new Date();

String time = timeFormat(now.getHours()) + ":"

+ timeFormat(now.getMinutes()) + ":" + timeFormat(now.getSeconds()); if (!(message.isEmpty()))

{

message = time + " : " + message + "\n";

taReceive.append("<<<< " + message);

// message = new String(message.getBytes("gbk"),"gb2312");

// 发送端转码在此处不可行，系统在发送时会默认编码添加行结束符

if (ps.checkError()) taReceive.append("系统提示：客户端未连接");

else

{

ps.println(message);

ps.flush();

taSend.setT ext("");

}

} else taReceive.append("系统提示：不能发送空消息");

}

// 将时间格式化成常用格式public String timeFormat(int time) {

if (time < 10) return "0" + time;

else return "" + time;

}

}