Reusing same ImageView multiple times in the same scene on JavaFX

Question

I\'m trying to build a Twitter-style ListView, and I couldn\'t reuse the same ImageView multiple times in the same list. Loading multiple copies seem to be wasteful and caus

Answer 1

Do something like this:

ImageView image = ...
ImageView src   = ...
image.setImage(src.getImage());

Answer 2

A scenegraph cannot contain the same Node twice in JavaFX, and there is no way of cloning nodes (as far as I know).

A workaround would perhaps be to make your map a HashMap store Image instead of ImageView, and change the last row to

setGraphic(new ImageView(images.get(imageUrl)));

This way you'll at least cache the loading of the actual Image, which should really be the heavy lifting part.

Answer 3

Caching images is good way.

Also You can load images in background, it greatly improve performance.

public Image getImage(String path, boolean backload) {
   image = imageCache.get(path);
   if (image == null) {
      image = new Image(path, backload);
      imageCache.put(path, image);
   }
   return image;
}