Android: load image from server

photo = Constants.PHOTO_URL + (String) photoList.get("name");
if (photo instanceof String && photo.length() > 0) {
new ImageUtility.DownloadImage().execute(new ImageUtility.DownloadImageParameters(photo, new ImageUtility.DownloadImageListener() {
@Override
public void onDownloadCompleted(Bitmap downloadedImage) {
    if (downloadedImage != null) {
instance.bitmapThumbnail = ThumbnailUtils.extractThumbnail(downloadedImage, 100, 100);
instance.commentPhoto6.setImageBitmap(instance.bitmapThumbnail);
}
}
}));
}