Hello there guys,

I've been asking around on many forums asking for some help on an application I am trying to create, Let me first explain the functionally of the application I want to develop

Application :

This application will simply start a server and allow other android devices to connect to the device and play this application together, how I want this to work is, one user will use WiFi, I do apologize the title should not have WiFi hot spot, I just want to use WiFi to send data from one device to another.

Problems :

I have created a TCP/IP and a Multicast server with java, now looking at Android, Android of course runs java applications, but I don't know as I can't find information about it, if the same code to start a Multicast server will work on a mobile device. All I'm trying to do is, one user will set up a server socket to listen on where clients will connect, once they are connected a thread will be created, and constant data will be send back to the client, this was achieved quite quickly and simple using Java, but with Android I'm not sure if I can do the same code for pc to Android?

Here is the code I have so far, but I don't think this does much

wifi = (WifiManager) context.getSystemService(Context.WIFI_SERVICE);

I have looked at this http://marakana.com/forums/android/examples/40.html , it gives an example application, but it just sends data to itself, I want to know how I can setup a sock on a mobile device, which can be used to send and receive data via UDP protocol.

Any help would be great, I have had no help from anyone so far, and trying to find the right code example is like trying to find a pin in a haystack.

Canvas

I'm using one of the devices as a Wifi hot-spot so that is the "router" as all clients first connect to that using WiFi, I don't want to use TCP because of the extra data being sent over, I want to just send fast and small packets, Would a datagramSocket be a bit easier to work with?

That is not a problem, with the data being send so often data can be lost and the effect will probably not be able to be seen by the naked eye. Also the reason I am asking if I should use a DatagramSocket instead of a MulticastSocket is, I have some code and when I run it I get this error

Java.net.SocketException: No such device

When I run this

try
		{
			socket.joinGroup( address );
		}
		catch ( IOException e )
		{
			Log.d(TAG, "Error code 0003");
			e.printStackTrace();
		}

MulticastSocket works like a radio where it keeps broadcasting it out which is good for my application, but I'm not sure if a DatagramSocket would just be easier because of networking issues.

Yes; Multicast requires specific support from your network routers and will not work across the Internet.

Well I'm going to try and create what I did using a DatagramSocket instead of a MulticastSocket, if I get any errors, the code will be put in this topic. Cheers for all the information people.