Android TCP 和 UDP

最新推荐文章于 2024-04-18 16:53:08 发布

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最新推荐文章于 2024-04-18 16:53:08 发布

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分类专栏： Android平台

本文链接：https://blog.youkuaiyun.com/kylin_fire_zeng/article/details/42082537

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原创：kylin_zeng http://blog.chinaunix.net/uid/23795897.html在此感谢mars 老师的帮助。转载请注明原创出处，尊重他人的劳动成果。有问题请加 Q群： 241359063 共同走向创业学习之旅。

1、创建TCP 的客户端：

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package mars;
import java.io.FileInputStream;
import java.io.InputStream;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.io.Writer;
import java.net.Socket;
public class TCPClient {
public static void main(String[] args) {
try {
//创建一个Socket对象，指定服务器端的IP地址和端口号
Socket socket = new Socket("192.168.1.104",4567);
//使用InputStream读取硬盘上的文件
InputStream inputStream = new FileInputStream("f://file/words.txt");
//从Socket当中得到OutputStream
OutputStream outputStream = socket.getOutputStream();
byte buffer [] = new byte[4*1024];
int temp = 0 ;
//将InputStream当中的数据取出，并写入到OutputStream当中
while((temp = inputStream.read(buffer)) != -1){
outputStream.write(buffer, 0, temp);
}
outputStream.flush();
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}

2、创建一个TCP 的服务监听器监听端口数据：

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package mars.socket;
import java.net.DatagramPacket;
import java.net.DatagramSocket;
import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
public class SocketActivity extends Activity {
/** Called when the activity is first created. */
private Button startButton = null;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
startButton = (Button)findViewById(R.id.startListener);
startButton.setOnClickListener(new StartSocketListener());
}
class StartSocketListener implements OnClickListener{
@Override
public void onClick(View v) {
new ServerThread().start();
}
}
class ServerThread extends Thread{
public void run(){
//声明一个ServerSocket对象
ServerSocket serverSocket = null;
try {
//创建一个ServerSocket对象，并让这个Socket在4567端口监听
serverSocket = new ServerSocket(4567);
//调用ServerSocket的accept()方法，接受客户端所发送的请求，如果没有数据，则在此处阻塞。
Socket socket = serverSocket.accept();
//从Socket当中得到InputStream对象
InputStream inputStream = socket.getInputStream();
byte buffer [] = new byte[1024*4];
int temp = 0;
//从InputStream当中读取客户端所发送的数据
while((temp = inputStream.read(buffer)) != -1){
System.out.println(new String(buffer,0,temp));
}
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
finally{
try {
serverSocket.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
}
}

二、UDP :
1、创建客户端：

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package mars;
import java.net.DatagramPacket;
import java.net.DatagramSocket;
import java.net.InetAddress;
public class UDPClient {
public static void main(String[] args) {
try {
//首先创建一个DatagramSocket对象
DatagramSocket socket = new DatagramSocket(4567);
//创建一个InetAddree
InetAddress serverAddress = InetAddress.getByName("192.168.1.104");
String str = "hello";
byte data [] = str.getBytes();
//创建一个DatagramPacket对象，并指定要讲这个数据包发送到网络当中的哪个地址，以及端口号
DatagramPacket packet = new DatagramPacket(data,data.length,serverAddress,4567);
//调用socket对象的send方法，发送数据
socket.send(packet);
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}

2、创建UDP 的服务端，监听端口：

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package mars.socket;
import java.net.DatagramPacket;
import java.net.DatagramSocket;
import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
public class SocketActivity extends Activity {
/** Called when the activity is first created. */
private Button startButton = null;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
startButton = (Button)findViewById(R.id.startListener);
startButton.setOnClickListener(new StartSocketListener());
}
class StartSocketListener implements OnClickListener{
@Override
public void onClick(View v) {
new ServerThread().start();
}
}
class ServerThread extends Thread{
public void run(){
try {
//创建一个DatagramSocket对象，并指定监听的端口号
DatagramSocket socket = new DatagramSocket(4567);
byte data [] = new byte[1024];
//创建一个空的DatagramPacket对象
DatagramPacket packet = new DatagramPacket(data,data.length);
//使用receive方法接收客户端所发送的数据，如果没有数据，则在此处监听。
socket.receive(packet);
String result = new String(packet.getData(),packet.getOffset(),packet.getLength());
System.out.println("result--->" + result);
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
}