I'd like to use my app's cache directory for storing small image files
(80x80 thumbnails) downloaded from the internet, but at the same time
I'm using WebViews which also want to use that area for images.  What
I want to avoid are file name collisions with webkit, so that cached
content between the two uses don't clobber each other.  I could put my
cache files on the SD card exclusively, but I don't want to create a
dependence on hardware that might not be there in all cases.  I would
use CacheManager, but I've heard that it can't be used outside of
WebView.

Is there a general naming structure to webkit-generated cache files?
That would certainly help in avoiding name collisions.

If not, is there another technique that has proven solid for avoiding
this problem?

Thanks!

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