Android客户端与服务端通信乱码问题的解决

在Android客户端与服务器端通信的过程中，使用输入流，输出流。readUTF(Str)和writeUTF(Str)方法能有效解决乱码问题。

以下为源码例子

客户端：
package com.socket.client;


import java.io.*;
import java.net.Socket;
import java.net.UnknownHostException;
import android.app.Activity;
import android.os.Bundle;
import android.os.Message;
import android.text.TextUtils;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;

public class main extends Activity implements OnClickListener{
??? /** Called when the activity is first created. */
//定义声明需要用到的UI元素
private EditText edtmsgcontent;
private Button btnSend;
Socket s = null;//声明Socket的引用
DataOutputStream dout = null;//输出流
DataInputStream din = null;//输入流

??? @Override
??? public void onCreate(Bundle savedInstanceState) {
??????? super.onCreate(savedInstanceState);
??????? //setContentView(R.layout.main);
??????? InitView();
??? }
??? private void InitView()
??? {
??? //显示主界面
??? setContentView(R.layout.main);
???
??? //通过id获取ui元素对象
??? edtmsgcontent=(EditText)findViewById(R.id.msgcontent);
??? btnSend=(Button)findViewById(R.id.btnsend);
???
??? //为btnsend设置点击事件
??? btnSend.setOnClickListener(this);
??? }
???
??? public void onClick(View bt)
??? {
??? try{//连接网络并打开流
??????? s = new Socket("192.168.10.141", 9998);
??????? dout = new DataOutputStream(s.getOutputStream());
??????? din = new DataInputStream(s.getInputStream());
}catch(Exception e){//捕获异常
e.printStackTrace();//打印异常
}
String u_distext = edtmsgcontent.getText().toString();//描述
String msg = u_distext;

try {
dout.writeUTF(msg);//向服务器发送注册消息
// String msg2 = din.readUTF();//接收服务器发送来的消息

} catch (IOException e) {//捕获异常
e.printStackTrace();//打印异常
} finally{
try{
if(dout != null){
dout.close();
dout = null;
}
}
catch(Exception e){//捕获异常
e.printStackTrace();//打印异常信息
}
try{
if(din != null){
din.close();
din = null;
}
}
catch(Exception e){//捕获异常
e.printStackTrace();//打印异常信息
}



}
???
}}



服务器端：

import java.io.BufferedReader;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.InputStreamReader;
import java.net.ServerSocket;
import java.net.Socket;

public class TCPDesktopServer implements Runnable{


??? public static final String SERVERIP = "192.168.10.141";

??? public static final int SERVERPORT = 9998;
???
??? DataInputStream din = null;//输入流
DataOutputStream dout = null;//输出流




??? public void run() {

???????? try {

???????????? System.out.println("S: Connecting...");

???????????? ServerSocket serverSocket = new ServerSocket(SERVERPORT);
????????
???????????????? while (true) {
????????
????????????????? Socket client = serverSocket.accept();
?????????????????
????????????????? din=new DataInputStream(client.getInputStream());//输入流
????? ? dout=new DataOutputStream(client.getOutputStream());//输入出流
?????????????????
????????????????? /*
?????????????????? *
?????????????????? *
?????????????????? * 此处增加一个获得用户数据（用户名）的模块。
?????????????????? * 令UserData=(User name)
?????????????????? * 并将其id和用户名加入到List中
?????????????????? *
?????????????????? *
?????????????????? */

????????????????? System.out.println("S: Receiving...");

????????????????? try {
?????????????? ?
??????????????? String msg=din.readUTF();//收消息
????? System.out.println("Client msg = " + msg);
??????????????????? } catch(Exception e) {

??????????????????????? System.out.println("S: Error");

??????????????????????? e.printStackTrace();

??????????????????? } finally {

??????????????????????? client.close();

??????????????????????? System.out.println("S: Done.");

??????????????????? }

???????????? }

????????? } catch (Exception e) {

???????????? System.out.println("S: Error");

???????????? e.printStackTrace();
???????? }
???????
?????????
??? }

?? public static void main (String a[]) {

??????? Thread desktopServerThread = new Thread(new TCPDesktopServer());

??????? desktopServerThread.start();
??? }
}

?

?

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