How to receive Multicast packets on Android

Question

I\'m trying to receive data from a multicast address, but the call to MulticastSocket.receive() blocks until a timeout takes place. I did some network sniffing and found ou

Answer 1

Lukas gives the best explanation and examples that I've seen on his blog: http://codeisland.org/2012/udp-multicast-on-android

In summary:
1. You need the permissions:

2. You need a lock:

    WifiManager wifi = (WifiManager)getSystemService(Context.WIFI_SERVICE);
    if (wifi != null){
        WifiManager.MulticastLock lock = wifi.createMulticastLock("mylock");
        lock.acquire();
    }

3. You have to have a device that supports receiving multicast. Or you can follow his work around for rooted devices.