scrolling issues in gridview when displaying a large number of images in android

I want to display a large number of images(say 500).i am currently displaying them in a scrollable grid layout by lazyloading images(very similar to fedor's lazylist). but i am having issues while scrolling the grid. when i scroll the grid, the views get refreshed and the actual images are reloaded. so, even the images that were displayed earlier are refetched from SD card. this causes a very slow UI. is there开发者_JAVA技巧 any solutions for this.(i.e is there a way to tell the grid view not to refesh views on scrolling).

or

is there any other better way to display large number of images.

Thumbnails would speed things up a bit. Check out: Android how to create runtime thumbnail