Android - Интернэт холболт байгаа эсэхийг шалгах with Dialog

    /**
     * Интернэт холболт байгаа эсэхийг шалгах
     */
    protected boolean hasInternetConnection() {
        try {

            ConnectivityManager nInfo = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);
            nInfo.getActiveNetworkInfo().isConnectedOrConnecting();

            ConnectivityManager cm = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);
            NetworkInfo netInfo = cm.getActiveNetworkInfo();
            if (netInfo != null && netInfo.isConnectedOrConnecting()) {
                return true;
            } else {
                AlertDialog alertDialog = new AlertDialog.Builder(this).create();
                alertDialog.setTitle(R.string.no_internet);
                alertDialog.setMessage(getString(R.string.require_internet));
                alertDialog.setIcon(R.drawable.ic_warning);
                alertDialog.setButton(DialogInterface.BUTTON_POSITIVE, "OK", new DialogInterface.OnClickListener() {
                    public void onClick(DialogInterface dialog, int which) {
                    }
                });
                alertDialog.show();
                return false;
            }

        } catch (Exception e) {
            AlertDialog alertDialog = new AlertDialog.Builder(this).create();
            alertDialog.setTitle(R.string.no_internet);
            alertDialog.setMessage(getString(R.string.require_internet));
            alertDialog.setIcon(R.drawable.ic_warning);
            alertDialog.setButton(DialogInterface.BUTTON_POSITIVE, "OK", new DialogInterface.OnClickListener() {
                public void onClick(DialogInterface dialog, int which) {
                }
            });
            alertDialog.show();
            return false;
        }
    }