Socket
事實上和JavaWeb 里面的Socket一模一樣
建立客服端，server端，server開一個port供客服端訪問


第一步創建server端：(這里把為了便于解說。把server端，和客服端都放在手機上了)
創建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; /*** 創建服務器端* * */public class MainActivity extends Activity {@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);AsyncTask.execute(new Runnable() {@Overridepublic void run() {startService();//訪問網絡}});}/** 服務器端從客服端* * */public void startService(){Socket socket =null;InputStream inputStream = null;try {ServerSocket serverSocket = new ServerSocket(9999);//填入端口號socket = serverSocket.accept();//接收客服端的的連接請求inputStream = socket.getInputStream();//獲取輸入流/** 從輸入流中讀取數據* * */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 blocke.printStackTrace();}finally{if(inputStream!=null){try {inputStream.close();} catch (IOException e) {// TODO Auto-generated catch blocke.printStackTrace();}}if(socket!=null)try {socket.close();} catch (IOException e) {// TODO Auto-generated catch blocke.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 {@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);AsyncTask.execute(new Runnable() {@Overridepublic void run() {// TODO Auto-generated method stubstartClient();}});}public void startClient(){OutputStream out = null;Socket socket = null;try {socket = new Socket("127.0.0.1",9999);out = socket.getOutputStream();//獲取輸出流out.write("abc".getBytes());//把相當于客服端數據寫到server端//虛擬機（手機）相當于一個電腦127.0.0.1是訪問手機自己，9999是server開的端口號} catch (Exception e) {e.printStackTrace();} finally{if(out!=null){try {out.close();} catch (IOException e) {// TODO Auto-generated catch blocke.printStackTrace();}//關閉}if(socket!=null){try {socket.close();} catch (IOException e) {// TODO Auto-generated catch blocke.printStackTrace();}}}} }

總結

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