From http://stackoverflow.com/questions/9570237/android-check-internet-connection

internetcontrol.java

public boolean isInternetAvailable() {
        try {
            InetAddress ipAddr = InetAddress.getByName("google.com"); //You can replace it with your name

            if (ipAddr.equals("")) {
                return false;
            } else {
                return true;
            }

        } catch (Exception e) {
            return false;
        }

    }