Android - drawing cache - when is it useful?

Question

Hi

I am reading about setDrawingCacheEnabled and getDrawingCache and I was wondering when is it good to use it or when its not good.

Basically in my case I have an horizontalScrollView with many things inside it so its scrolls left/right and most of the things are not visible.

If I use setDrawingCacheEnabled(true) on the views, does it help? or this is only when I use custom views and I call getDrawingCache()?

Is there any other 'cache' way to use in a horizontalscrollview?

Thanks