CODEWITHSUNDEEP
javaandroidudplistener
Axel
Axel

Reputation: 185

UDP Listener doesn't receive data

I am trying to make a UDP Listener listening to a server and receiving data.

Here is the UDPListener :

public class UDPListener extends AsyncTask<Void, String, Void>{
    public UDPConnector udpConnector;

    public UDPListener(UDPConnector udpConnector){
        byte[] buff;
    this.udpConnector = udpConnector;
    System.out.println("UDPListener initalized");
    }

    @Override
    protected Void doInBackground(Void... voidResult){
        Looper.prepare();
        while(true){
    
            byte[] buffer = new byte[512];
            DatagramPacket p = new DatagramPacket(buffer, buffer.length);
    
      

      try {
                System.out.println("Message reçu debug ");
                udpConnector.UDPSocket.receive(p);
                if(p.getData().length > 0){

                    buffer = p.getData();
                    String s = new String(buffer, 0, p.getLength());

                    publishProgress(s);
                }
            } catch (IOException e) {
                e.printStackTrace();

            }
        }
    }

    @Override
    protected void onProgressUpdate(String... values) {
        super.onProgressUpdate(values);
        udpConnector.main.handleTextReceived(values[values.length-1]);
    }
}

The problem is publishProgress() never gets executed. I am sure that the UDPConnector is well configured because i can send data to the server. And i know that the method doInBackground is executed. I am also sure that the serveur is sending data to me as i can receive it with other tools.

I can post more code if needed, please let me know.

Thanks

Upvotes: 0

Views: 250

Answers (2)

Assay
Assay

Reputation: 146

If you are using the phone emulator, the emulator might be changing your expected IP address for which you will have to create a redirect. Look at this post

Datagram (UDP) receiver not working - not receiving broadcast packets

Upvotes: 1

Indivon
Indivon

Reputation: 1864

So, you don't initialize the socket with a specific port? which one is your server using for sending the datagrams? Maybe your problem is, that the socket is listening to a random port, which does not match to your port.

Upvotes: 0

Related Questions