CheckNetworkConnected.java

public static boolean isNetworkConnected() {
    final ConnectivityManager cm = (ConnectivityManager)context.getSystemService(Context.CONNECTIVITY_SERVICE);

    if (cm != null) {
        if (Build.VERSION.SDK_INT < 23) {
            final NetworkInfo ni = cm.getActiveNetworkInfo();

            if (ni != null) {
                return (ni.isConnected() && (ni.getType() == ConnectivityManager.TYPE_WIFI || ni.getType() == ConnectivityManager.TYPE_MOBILE));
            }
        } else {
            final Network n = cm.getActiveNetwork();

            if (n != null) {
                final NetworkCapabilities nc = cm.getNetworkCapabilities(n);

                return (nc.hasTransport(NetworkCapabilities.TRANSPORT_CELLULAR) || nc.hasTransport(NetworkCapabilities.TRANSPORT_WIFI));
            }
        } 
    }

    return false; 
}