public boolean isFavorite(EarthWallpaper earthWallpaper) {
   return Favorites.getFavorites(context).isFavorite(earthWallpaper);
 }
 public void removeFavorite(EarthWallpaper earthWallpaper) {
   Favorites.getFavorites(context).removeFavorite(earthWallpaper);
 }
 public void addFavorite(EarthWallpaper earthWallpaper) {
   Favorites.getFavorites(context).addFavorite(earthWallpaper);
 }