Android开发_Socket(二)

Socket编程

1、基本介绍

Socket 英文原意为“插座”

Socket通常也称作“套接字”，用于描述IP地址和端口，是一个通信链的句柄

应用程序通常通过“套接字”向网络发出请求或者应答网络要求

 

 

 

2、Scoket基本通信模型

 

        

ServerSocket ______________________________________包括TCP和UDP的server端

package com.example.socket_server;

import java.io.InputStream;
import java.net.DatagramPacket;
import java.net.DatagramSocket;
import java.net.ServerSocket;
import java.net.Socket;

import android.app.Activity;
import android.database.MergeCursor;
import android.os.Bundle;
import android.util.Log;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;

public class SocketServerActivity extends Activity {

	private Button start_socket;
	
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_socket_server);
		//Start UI
		start_socket = (Button)findViewById(R.id.socketserver);
		start_socket.setOnClickListener(new OnClickListener() {
			
			@Override
			public void onClick(View arg0) {
				// TODO Auto-generated method stub
				new ServerThread().start();
			}
		});
	}

	//TCP
	
	/*class ServerThread extends Thread{

		@Override
		public void run() {
			// TODO Auto-generated method stub
			super.run();
			ServerSocket mServerSocket = null;
			try{
				//创建一个ServerSocket 并让socket在 1234 端口监听	
				mServerSocket = new ServerSocket(1234);
				Log.d("myDebug", "Now waiting serverScoket.accept() !");
				Socket mSocket = mServerSocket.accept();
				InputStream mInputStream = mSocket.getInputStream();
				byte buffer [] = new byte[1024*4];
				int temp = 0;
				while((temp = mInputStream.read(buffer)) != -1){
					Log.d("myDebug", "Now is printing the String !");
					System.out.println(new String(buffer,0,temp));
				}
			}
			catch(Exception e){
				e.printStackTrace();
			}
			finally{
				try{
					mServerSocket.close();
				}
				catch(Exception e){
					e.printStackTrace();
				}
			}
		}
		
	}*/
	//UDP
	class ServerThread extends Thread {

		@Override
		public void run() {
			// TODO Auto-generated method stub
			super.run();
			try {
				DatagramSocket socket = new DatagramSocket(1234);
				byte data[] = new byte[1024 * 4];
				DatagramPacket packet = new DatagramPacket(data, data.length);
				socket.receive(packet);
				String result = new String(packet.getData(), packet.getOffset(), packet.getLength());
				System.out.println("result ------------> " + result);
			} catch (Exception e) {
				e.printStackTrace();
			}

		}

	}
	
	@Override
	public boolean onCreateOptionsMenu(Menu menu) {
		// Inflate the menu; this adds items to the action bar if it is present.
		getMenuInflater().inflate(R.menu.activity_socket_server, menu);
		return true;
	}

}

3、基于TCP协议的Scoket

package client;

import java.io.FileInputStream;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.Socket;

public class Client_TCP {
	private String str = "abcdefghijklnopqrstuvwxyz!";
	
	public static void main(String[] args) {
		try{
			Socket mSocket = new Socket("192.169.0.1", 1234);
			InputStream mInputStream = new FileInputStream("I:\\1.txt");
			OutputStream mOutputStream = mSocket.getOutputStream();
			byte buffer[] = new byte[1024*4];
			int temp = 0 ;
			while((temp = mInputStream.read(buffer)) != -1){
				mOutputStream.write(buffer, 0, temp);
			}
			mOutputStream.flush();
		}
		catch(Exception e){
			e.printStackTrace();
		}
	}
}

4、基于UDP协议的Scoket

package client;

import java.net.DatagramPacket;
import java.net.DatagramSocket;
import java.net.InetAddress;

public class Client_UDP {
	public static void main(String[] args) {
		try {
			DatagramSocket socket = new DatagramSocket(1234);
			InetAddress serverAddress = InetAddress.getByName("192.168.0.1");
			String str = "abcdefghijkmnopqstuvwyz";
			byte data[] = new byte[1024 * 4];
			data = str.getBytes();
			DatagramPacket packet = new DatagramPacket(data, data.length, 1234);
			socket.send(packet);
		} catch (Exception e) {
			e.printStackTrace();
		}

	}
}