new socket 连接超时是为毛

new socket 语句连接超时
AndroidManifest.xml已经添加过权限了

package com.example.administrator.ffffff;
import android.app.Activity;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.widget.EditText;
import android.widget.LinearLayout;
import android.widget.RelativeLayout;
import android.widget.TextView;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.Socket;
public class MainActivity extends Activity {
    EditText show;
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        show = (EditText)findViewById(R.id.show);
        new Thread()
        {
            public void run()
            {
                try
                {
                    Socket socket = new Socket("192.168.1.102",30000);//这里连接超时
                    BufferedReader br = new BufferedReader(new InputStreamReader(socket.getInputStream()));
                    String line = br.readLine();
                    show.setText("来自服务器的数据:" + line);
                    br.close();
                    socket.close();
                }
                catch (IOException e)
                {
                    e.printStackTrace();
                }
            }
        }.start();
    }
}

//这个代码是运行在 Windows 上的
import java.util.concurrent.locks.*;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.*;
import java.io.*;
import javax.swing.*;
import java.awt.*;
import java.net.*;
public class dd
{
	public static void main(String[]args)throws IOException
	{
		ServerSocket ss = new ServerSocket(30000);
		while(true)
		{
			Socket s= ss.accept();
			OutputStream os = s.getOutputStream();
			os.write("您好，您收到了服务器的新年祝福！\n".getBytes("utf-8"));
			os.close();
			ss.close();
		}
	}

}

发个截图来证明电脑IP地址没错

 new Thread()
        {
            public void run()
            {
                try
                {
                    Socket socket = new Socket("192.168.1.102",30000);//这里连接超时
                    BufferedReader br = new BufferedReader(new InputStreamReader(socket.getInputStream()));
                    String line = br.readLine();
                    show.setText("来自服务器的数据:" + line);
                    br.close();
                    socket.close();
                }
                catch (IOException e)
                {
                    e.printStackTrace();
                }
            }
        }.start();