Android: get network type

public static String getNetworkType(Context context) {
        NetworkInfo networkInfo;
        ConnectivityManager connectivityManager = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
        networkInfo = connectivityManager.getActiveNetworkInfo();
        if (networkInfo != null && networkInfo.isConnected()) {
            String type = networkInfo.getTypeName();
            if (type.toLowerCase().equals(WIFI)) {
                return TYPE_WIFI;
            } else if (type.toLowerCase().equals(MOBILE)) {
                type = networkInfo.getSubtypeName();
                if (type.toLowerCase().equals(GSM)
                        || type.toLowerCase().equals(GPRS)
                        || type.toLowerCase().equals(EDGE)) {
                    return TYPE_2G;
                } else if (type.toLowerCase().startsWith(CDMA)
                        || type.toLowerCase().equals(UMTS)
                        || type.toLowerCase().equals(ONEXRTT)
                        || type.toLowerCase().equals(EHRPD)
                        || type.toLowerCase().equals(HSUPA)
                        || type.toLowerCase().equals(HSDPA)
                        || type.toLowerCase().equals(HSPA)) {
                    return TYPE_3G;
                } else if (type.toLowerCase().equals(LTE)
                        || type.toLowerCase().equals(UMB)
                        || type.toLowerCase().equals(HSPA_PLUS)) {
                    return TYPE_4G;
                }
            }
        } else {
            return TYPE_NONE;
        }
        return TYPE_UNKNOWN;
    }
 
    
    public static final String WIFI = "wifi";
    public static final String WIMAX = "wimax";
    // mobile
    public static final String MOBILE = "mobile";
    // 2G network types
    public static final String GSM = "gsm";
    public static final String GPRS = "gprs";
    public static final String EDGE = "edge";
    // 3G network types
    public static final String CDMA = "cdma";
    public static final String UMTS = "umts";
    public static final String HSPA = "hspa";
    public static final String HSUPA = "hsupa";
    public static final String HSDPA = "hsdpa";
    public static final String ONEXRTT = "1xrtt";
    public static final String EHRPD = "ehrpd";
    // 4G network types
    public static final String LTE = "lte";
    public static final String UMB = "umb";
    public static final String HSPA_PLUS = "hspa+";
    // return types
    public static final String TYPE_UNKNOWN = "unknown";
    public static final String TYPE_ETHERNET = "ethernet";
    public static final String TYPE_WIFI = "wifi";
    public static final String TYPE_2G = "2g";
    public static final String TYPE_3G = "3g";
    public static final String TYPE_4G = "4g";
    public static final String TYPE_NONE = "none";
}