手机使用GPRS网络与server进行Socket通信，代码下载地址：

用UDP协议与Socket调试工具进行測试。

SocketActivity.java：

package com.example.socket;import java.net.DatagramPacket;import java.net.DatagramSocket;import java.net.InetAddress;import android.os.Bundle;import android.app.Activity;import android.view.View;import android.widget.Button;import android.view.View.OnClickListener;public class SocketActivity extends Activity {	private Button startButton = null;	@Override	public void onCreate(Bundle savedInstanceState) {		super.onCreate(savedInstanceState);		setContentView(R.layout.activity_socket);		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{				DatagramSocket socket = new DatagramSocket(1234);				InetAddress serverAddress = InetAddress.getByName("115.238.249.92");				String str = "hello";				byte data[] = str.getBytes();				DatagramPacket packet = new DatagramPacket(data,data.length,serverAddress,1234);				socket.send(packet);			}catch (Exception e)			{				e.printStackTrace();			}			}	}}

activity_socket.xml：

Socket调试工具创建UDP Server监听1234port，本机IP为115.238.249.92。

安装执行apk，按下Sendbutton。server端收到数据。

注意在AndroidManifest.xml中加入：