public boolean checkNetwork() {

    boolean result = false;

    try {

        Context context = this.getApplicationContext();

        ConnectivityManager connectivityMgr = (ConnectivityManager)context.getSystemService(Context.CONNECTIVITY_SERVICE);

        NetworkInfo networkInfo = connectivityMgr.getActiveNetworkInfo();

        if (networkInfo != null) {

            result = networkInfo.isAvailable();

        }

    }

    catch (Exception e) {

        Log.e("test", "get active network info leave: " + e.getMessage());

    }

    return result;

}