How to use bitmap from url as icon for ItemizedOverlay - WITH CACHE?

I've seen plenty of examples of how to create an ItemizedOverlay on MapView with an image from the bundle. I've seen plenty of examples of how to get a Drawable from a URL. I've even managed to 开发者_JAVA百科cobble the two together to use a drawable made from a bitmap fetched remotely. Now the problem I'm running into is how can I make that Drawable cachable?

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Don't cache drawables - this can lead to memory leak.

You should cache Bitmaps and create Drawables from then when needed.