Should I use Bitmap or Drawable to store in ImageCache on Android?

I implemented a ImageCache. But I'm curious about what type to store in it will cost less.

Now I use BitmapFactory to get the images from the internet, so I get a Bitmap first. Should I convert to a Drawable to store in my ImageCache or just store the Bitmap is fine?

Any ideas?

开发者_JS百科

Thanks.

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Just store the Bitmap. That's what you're caching and I'm not sure what you'd gain by shoving it into a BitmapDrawable first. It would definitely take more space as a Drawable since it contains the bitmap anyway. You don't really lose anything either way as both are convertible back and forth.

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Everything depends on if you want to cache an image with different state like a selector (pressed, focused, etc). The bitmap will not contain this information compare to caching the drawable.