Dialog progress = new Dialog("Downloading", BoxLayout.y());
progress.add(new SpanLabel("Downloading from the server please wait...", "DialogBody");
progress.showModless();
boolean success = Util.downloadUrlToStorage(url, fileNameToStore, false);
progress.dispose();
if(success) {
ToastBar.showInfoMessage("Download completed Successfully!");
} else {
ToastBar.showErrorMessage("Download failed!");
}