Android网络编程Socket【实例解析】

Socket

事实上和JavaWeb 里面的Socket一模一样

建立客服端，server端，server开一个port供客服端訪问

第一步创建server端：(这里把为了便于解说。把server端，和客服端都放在手机上了)

创建Androidproject

socketserver

package com.example.socketserver;

import java.io.IOException;
import java.io.InputStream;
import java.net.ServerSocket;
import java.net.Socket;

import android.os.AsyncTask;
import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;
/**
* 创建服务器端
*
* */

public class MainActivity extends Activity {

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
AsyncTask.execute(new Runnable() {
@Override
public void run() {
startService();//訪问网络
}
});
}
/*
* 服务器端从客服端
*
* */
public void startService(){
Socket socket =null;
InputStream inputStream = null;
try {
ServerSocket serverSocket = new ServerSocket(9999);//填入端口号
socket = serverSocket.accept();//接收客服端的的连接请求

inputStream = socket.getInputStream();//获取输入流

/*
* 从输入流中读取数据
*
* */
byte[] bs = new byte[1024];
int i=-1;
while((i = inputStream.read(bs))!=-1){
System.out.println(new String(bs,0,i));

}

} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}finally{
if(inputStream!=null){
try {
inputStream.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
if(socket!=null)
try {
socket.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
}

第二步搭建Socket客服端

package com.example.socketclient;

import java.io.IOException;
import java.io.OutputStream;
import java.net.Socket;
import java.net.UnknownHostException;

import android.os.AsyncTask;
import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;

public class MainActivity extends Activity {

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
AsyncTask.execute(new Runnable() {

@Override
public void run() {
// TODO Auto-generated method stub
startClient();
}
});
}
public void startClient(){
OutputStream out = null;
Socket socket = null;
try {
socket = new Socket("127.0.0.1",9999);
out = socket.getOutputStream();//获取输出流

out.write("abc".getBytes());//把相当于客服端数据写到server端

//虚拟机（手机）相当于一个电脑127.0.0.1是訪问手机自己，9999是server开的端口号

} catch (Exception e) {
e.printStackTrace();
} finally{
if(out!=null){
try {
out.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}//关闭
}
if(socket!=null){
try {
socket.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}

}
}
}