android udp编程

============问题描述============

package com.example.udpclient;



import android.app.Activity;

import android.os.Bundle;

import android.util.Log;



import java.io.IOException;

import java.net.DatagramPacket;

import java.net.DatagramSocket;

import java.net.InetAddress;

import java.net.SocketException;

import java.net.UnknownHostException;



public class MainActivity extends Activity

{

	private static final int MAX_DATA_PACKET_LENGTH = 100;  

    private byte[] buffer = new byte[MAX_DATA_PACKET_LENGTH];  

    private DatagramPacket dataPacket = null;  

    private DatagramSocket udpSocket = null;  

    

	@Override

	protected void onCreate(Bundle savedInstanceState)

	{

		super.onCreate(savedInstanceState);

		setContentView(R.layout.activity_main);

		

		Thread thread = new Thread(runnable);

		thread.start();

	}

	

	Runnable runnable = new Runnable()

	{

		@Override

		public void run()

		{

			// TODO Auto-generated method stub

			try

			{

				udpSocket = new DatagramSocket(5000);

				dataPacket = new DatagramPacket(buffer, MAX_DATA_PACKET_LENGTH);  

				Log.v("packet", "pakcet built!");

		        String str = "hello,jdh";  //这是要传输的数据  

		        byte out [] = new byte[]{(byte)127, (byte)17, (byte)10};  //把传输内容分解成字节  

		        dataPacket.setData(out);

		        dataPacket.setLength(out.length);

		        Log.v("packet length", "pakcet length!");

		        try

				{

					dataPacket.setAddress(InetAddress.getByName("10.13.33.136"));

					dataPacket.setPort(5000);

					Log.v("packet port", "pakcet port!");

				} catch (UnknownHostException e)

				{

					// TODO Auto-generated catch block

					e.printStackTrace();

				}

			} catch (SocketException e)

			{

				// TODO Auto-generated catch block

				e.printStackTrace();

			}

			try

			{

				udpSocket.send(dataPacket);

				Log.v("packet sent", "packet sent!");

			} catch (IOException e)

			{

				// TODO Auto-generated catch block

				e.printStackTrace();

			}

		}

	};

}

电脑写的客户端可以发送给服务器，但是手机端这个客户端却发送不成功，10.13.33.136是我本机ip，我手机连的是wifi。求解，是不是手机端写的哪里有问题？谢啦！

============解决方案1============