一、代码
1.xml
(1)main.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
>
<Button
android:id="@+id/startListener"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="启动监听线程"
/>
</LinearLayout>
(2)AndroidManifest.xml
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.socket"
android:versionCode="1"
android:versionName="1.0" > <uses-sdk
android:minSdkVersion="8"
android:targetSdkVersion="21" /> <application
android:allowBackup="true"
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<activity
android:name=".SocketActivity"
android:label="@string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" /> <category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
<uses-permission android:name="android.permission.CHANGE_NETWORK_STATE"/>
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>
<uses-permission android:name="android.permission.CHANGE_WIFI_STATE"/>
<uses-permission android:name="android.permission.ACCESS_WIFI_STATE"/>
<uses-permission android:name="android.permission.INTERNET"/>
</manifest>
2.java
(1)SocketActivity.java
package com.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();
} } //运行时要注释掉一个run方法
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，是阻塞方法
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();
}
} }
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,用来接收数据，udp是一个包一个包接收的，没有流的概念
DatagramPacket packet = new DatagramPacket(data,data.length);
//使用receive方法接收客户端所发送的数据，也是阻塞方法
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();
}
}
}
}
(2)TCPClient.java
package com.client; import java.io.FileInputStream;
import java.io.InputStream;
import java.io.OutputStream;
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("localhost",4567);
//使用InputStream读取硬盘上的文件
InputStream inputStream = new FileInputStream("D://LoseYourself.lrc");
//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){
e.printStackTrace();
}
}
}
(3)UDPClient.java
package com.client; import java.net.DatagramPacket;
import java.net.DatagramSocket;
import java.net.InetAddress;
import java.net.UnknownHostException; public class UDPClient {
public static void main(String[] args) throws UnknownHostException {
System.out.println(">>> --UDPClient-- >>>>>>>>>>>>>>"); // 首先创建一个DatagramSocket对象
DatagramSocket socket;
try {
socket = new DatagramSocket(4567);
// 创建一个InetAddress,代表网络的一个地址
InetAddress serverAddress = InetAddress.getByName("192.168.1.104");
String str = "hello socket";
byte data[] = str.getBytes();
// 创建一个DatagramPacket对象，并指定要将这个数据包发送的网络的哪个地址和端口
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) {
e.printStackTrace();
}
}
}