List devices on local network with ping

Question

I\'m trying to create a function that lists all connected devices on a local network. What I do is to ping any address from addresspace x.x.x.0 to x.x.x.255, but it doesn\'t

Answer 1

Here's slightly modified loop which should do the trick (or worked for me at least);

try {
    NetworkInterface iFace = NetworkInterface
            .getByInetAddress(InetAddress.getByName(YourIPAddress));

    for (int i = 0; i <= 255; i++) {

        // build the next IP address
        String addr = YourIPAddress;
        addr = addr.substring(0, addr.lastIndexOf('.') + 1) + i;
        InetAddress pingAddr = InetAddress.getByName(addr);

        // 50ms Timeout for the "ping"
        if (pingAddr.isReachable(iFace, 200, 50)) {
            Log.d("PING", pingAddr.getHostAddress());
        }
    }
} catch (UnknownHostException ex) {
} catch (IOException ex) {
}