java - Sending UDP packages from ANDROID 2.2 (HTC desire) -


i have lan , want send upd message android (htc desire) pc. theres wlan router between them. problem is, upd message never gets pc.

code on android.:

package org.example.androidapp;  import java.net.datagrampacket; import java.net.datagramsocket; import java.net.inetaddress;  public class udpclientand {      public void sendudpmessage(int port) throws java.io.ioexception {         datagramsocket socket = new datagramsocket();         inetaddress serverip = inetaddress.getbyname("192.168.1.110");         byte[] outdata = ("ping").getbytes();         datagrampacket out = new datagrampacket(outdata,outdata.length, serverip,50005);         socket.send(out);         socket.close();     }  } 

i choose high port on booth sides.

the permissions on android are:

uses-permission android:name="android.permission.internet" uses-permission android:name="android.permission.change_wifi_multicast_state"  

the server-side pc simple programm receiving:

package org.example.androidapp;  import java.io.ioexception; import java.net.datagrampacket; import java.net.datagramsocket; import java.net.inetaddress; import java.net.socketexception;  public class updserverand implements runnable{ public void run(){ byte[] indata = new byte[48]; byte[] outdata = new byte[48]; string message; datagramsocket socket; try {     socket = new datagramsocket(50005);     while (true) {         datagrampacket in = new datagrampacket(indata,indata.length);         socket.receive(in);         inetaddress senderip = in.getaddress();         int senderport = in.getport();         message=new string(in.getdata(),0,in.getlength());         system.out.println("got "+message+" "+senderip+","+senderport);         outdata = "pong".getbytes();         datagrampacket out = new datagrampacket(outdata,outdata.length, senderip,senderport);         socket.send(out);         } } catch (socketexception e) {     e.printstacktrace(); }   catch (ioexception e) {     e.printstacktrace(); }  }  } 

so why there no udp package visible coming android? wireshark shows arp packages. plz :)

i having similar problem. solution add:

uses-permission android:name="android.permission.internet" uses-permission android:name="android.permission.access_network_state" uses-permission android:name="android.permission.change_wifi_multicast_state" 

to manifest.xml file. disabled windows firewall , worked. able send string droid pc.


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