Android網絡編程Socket【實例解析】

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：(這里把為了便於解說。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 {

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);
		AsyncTask.execute(new Runnable() {
			@Override
			public 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 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();//獲取輸出流

			out.write("abc".getBytes());//把相當於客服端數據寫到server端

			//虛擬機（手機）相當於一個電腦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 block
					e.printStackTrace();
				}//關閉
			}
			if(socket!=null){
				try {
					socket.close();
				} catch (IOException e) {
					// TODO Auto-generated catch block
					e.printStackTrace();
				}
			}

		}
	}
}