imageUrl method
generate ImageUrl for Gravatar
Implementation
String imageUrl(
{int size = 80, String defaultImage = "identicon", String rating = "g"}) {
String _imageUrl = _gravatarUrl + "avatar/" + _generateMd5(_email);
_imageUrl += "?" + "s=" + size.toString();
_imageUrl += "&" + "r=" + rating;
_imageUrl += "&" + "d=" + defaultImage;
return _imageUrl;
}