[TIMOB-343] Android: Background image download support

See http://support.appcelerator.net/discussions/titanium-mobile-discussion/1191-remote-images-very-jerky-on-android-okay-on-iphone When pulling images from a remote URL, find a way to download in the background and make them available at a later time.

Matt Collinge 2011-04-15

I'm not too worried about the cache that makes them available at a later time.. it's being able to download them in the background without making the table scroll really jerkily; maybe take a look at this class someone else has written: http://wu-media.com/2009/06/android-imageloader-load-images-sequencially-in-the-background/
Matt Collinge 2011-04-15

Actually, we've just done another app that would benefit from image caching. So it'd be good if this ticket addressed both the jerky scroll problem, and allows us to cache images as well.
Ping Wang 2012-07-25

Need a test case.