Android C/S结构的简易群聊应用 学习笔记1

功能：

只支持多个客户端同时在线聊天功能。

源码：

MultiThreadServer

MyServer.java

import java.io.IOException;import java.net.ServerSocket;import java.net.Socket;import java.util.ArrayList;public class MyServer {public static ArrayList<Socket> socketList = new ArrayList<Socket>();final static int LISTEN_PORT = 6889;public static void main(String[] args){ServerSocket ss = null;try {ss = new ServerSocket(LISTEN_PORT);} catch (IOException e1) {// TODO Auto-generated catch blocke1.printStackTrace();}while(true){try {System.out.println("listening...");Socket s = ss.accept();socketList.add(s);//deal with each connection in a threadnew Thread(new ServerThread(s)).start();} catch (IOException e) {// TODO Auto-generated catch blocke.printStackTrace();}}}}

ServerThread.java

import java.io.BufferedReader;import java.io.IOException;import java.io.InputStreamReader;import java.io.OutputStream;import java.io.UnsupportedEncodingException;import java.net.Socket;import java.net.SocketAddress;import java.text.SimpleDateFormat;import java.util.Calendar;public class ServerThread implements Runnable{//the connect socket dealt with by current threadSocket s =null;//the inputstream of the current thread's socketBufferedReader br = null;public ServerThread(Socket s){this.s = s;try {br = new BufferedReader(new InputStreamReader(s.getInputStream(),"utf-8"));System.out.println("excute the constructor of the thread...");} catch (UnsupportedEncodingException e) {// TODO Auto-generated catch blocke.printStackTrace();} catch (IOException e) {// TODO Auto-generated catch blocke.printStackTrace();}}@Overridepublic void run(){String send_msg = null;String recv_msg = null;System.out.println("begin while for...");//read msg from client by using a while loopwhile((recv_msg = readFromClient())!=null){for(Socket s : MyServer.socketList){//send msg to every clienttry {OutputStream os = s.getOutputStream();//msg from addr//SocketAddress remote_addr = s.getRemoteSocketAddress();send_msg = "(" + getCurrentTime() + ")" + recv_msg;//System.out.println(send_msg);os.write((send_msg+"\r\n").getBytes("utf-8"));//send msg to each client} catch (IOException e) {// TODO Auto-generated catch blocke.printStackTrace();}}}}private String readFromClient(){try {String read_msg = null;read_msg = br.readLine();return read_msg;} catch (IOException e) {// TODO Auto-generated catch block//MyServer.socketList.remove(s);e.printStackTrace();}return null;}private String getCurrentTime(){Calendar calendar = Calendar.getInstance();SimpleDateFormat sd = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");String time = sd.format(calendar.getTime());return time;}}

MultiThreadClient

MultiThreadClient.java

package com.example.multithreadclient;import android.os.Bundle;import android.os.Handler;import android.os.Message;import android.app.Activity;import android.view.Menu;import android.view.View;import android.widget.Button;import android.widget.EditText;import android.widget.TextView;public class MultiThreadClient extends Activity {final static int RECV_MSG = 0x1234;final static int SEND_MSG = 0x1235;final static String server_ip = "172.27.35.1";final static int server_port = 6889;//TextView show;EditText input;Button send;Handler handler;ClientThread clientThread;//    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_multi_thread_client);        //        show = (TextView) findViewById(R.id.show);        input = (EditText) findViewById(R.id.input);send = (Button) findViewById(R.id.send);handler = new Handler(){@Overridepublic void handleMessage(Message msg){//show recv_msg in the textviewif(msg.what == RECV_MSG){String recv_msg = msg.obj.toString();//show.setText(recv_msg);show.append("\n" + recv_msg);}}};clientThread = new ClientThread(handler);new Thread(clientThread).start();//pro:if the thread is not started ,but send button is clicked ?//send the msg in the input edittext to the recvHandlersend.setOnClickListener(new View.OnClickListener() {@Overridepublic void onClick(View arg0) {// TODO Auto-generated method stubMessage msg = new Message();msg.what = SEND_MSG;msg.obj = input.getText().toString();//msg contentclientThread.recvHandler.sendMessage(msg);input.setText("");//clear the input edit after send}});        //    }        }

ClientThread.java

package com.example.multithreadclient;import java.io.BufferedReader;import java.io.IOException;import java.io.InputStream;import java.io.InputStreamReader;import java.io.OutputStream;import java.net.Socket;import java.net.UnknownHostException;import android.os.Handler;import android.os.Looper;import android.os.Message;//all operation about socket are in the threadpublic class ClientThread implements Runnable{Socket s = null;Handler handler = null;//send msg to UIHandler recvHandler = null;//recv msg from UIInputStream is = null;BufferedReader br = null;OutputStream os = null;public ClientThread(Handler handler){this.handler = handler;}@Overridepublic void run() {// TODO Auto-generated method stubtry {s = new Socket(MultiThreadClient.server_ip,MultiThreadClient.server_port);//do not put the following statements in the handleMessgae or child thread run blockis = s.getInputStream();br = new BufferedReader(new InputStreamReader(is));os = s.getOutputStream();////child thread  : read data from the servernew Thread(){@Overridepublic void run(){String recv_msg = null;while((recv_msg = readFromServer())!= null){Message msg = new Message();msg.what = MultiThreadClient.RECV_MSG;msg.obj = recv_msg;handler.sendMessage(msg);//send the received msg to UI }}}.start();Looper.prepare();recvHandler = new Handler(){@Overridepublic void handleMessage(Message msg){//send msg to the serverString send_msg = null;if(msg.what == MultiThreadClient.SEND_MSG){try {   //本地地址:消息内容send_msg = s.getLocalAddress().toString() + ":" + msg.obj.toString() + "\r\n";os.write(send_msg.getBytes("utf-8"));} catch (IOException e) {// TODO Auto-generated catch blocke.printStackTrace();}}}};Looper.loop();} catch (UnknownHostException e) {// TODO Auto-generated catch blocke.printStackTrace();} catch (IOException e) {// TODO Auto-generated catch blocke.printStackTrace();}}private String readFromServer() {// TODO Auto-generated method stubtry {return br.readLine();} catch (IOException e) {// TODO Auto-generated catch blocke.printStackTrace();}return null;}}

activity_multi_thread_client.xml

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"android:orientation="vertical"android:layout_width="match_parent"android:layout_height="match_parent">    <!-- show msg from server -->    <!-- TextView长文本，有滚动条 -->    <ScrollView          android:layout_width="fill_parent"          android:layout_height="0dp"         android:layout_weight="1"        >      <TextViewandroid:id="@+id/show" android:layout_width="match_parent" android:layout_height="match_parent" android:background="#ffff"android:textSize="14dp"android:textColor="#ff00ff"android:layout_weight="1"/></ScrollView>  <LinearLayout android:orientation="horizontal"android:layout_width="match_parent"android:layout_height="wrap_content"><!-- accept user input info --><EditTextandroid:id="@+id/input"  android:layout_width="0dp" android:layout_height="wrap_content" android:layout_weight="4"/><Buttonandroid:id="@+id/send"  android:layout_width="0dp" android:layout_height="wrap_content" android:layout_weight="1"android:text="@string/send"/></LinearLayout></LinearLayout>

AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?><manifest xmlns:android="http://schemas.android.com/apk/res/android"    package="com.example.multithreadclient"    android:versionCode="1"    android:versionName="1.0" >    <uses-sdk        android:minSdkVersion="8"        android:targetSdkVersion="18" />    <uses-permission android:name="android.permission.INTERNET"/>        <!-- "adjustResize"该 Activity主窗口总是被调整屏幕的大小以便留出软键盘的空间 -->        <application        android:allowBackup="true"        android:icon="@drawable/ic_launcher"        android:label="@string/app_name"        android:theme="@style/AppTheme" >        <activity            android:name="com.example.multithreadclient.MultiThreadClient"            android:label="@string/app_name"             android:windowSoftInputMode="adjustResize"            >            <intent-filter>                <action android:name="android.intent.action.MAIN" />                <category android:name="android.intent.category.LAUNCHER" />            </intent-filter>        </activity>    </application></manifest>

测试运行效果：

局域网拓扑图：

搭建局域网：

服务器端：

客户端：

运行结果：

Server:

Client 1:

Client2: