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 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(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 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 .Socket;

import .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(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