On Tue, Jul 24, 2012 at 3:08 AM, Dianne Hackborn <hack...@android.com> wrote:
> In this case providing the different densities
> yourself is pretty much entirely a performance optimization -- the platform
> doesn't need to do the scaling at runtime when loading your resources.

It's also a bit of a quality-control optimization. Different scaling
algorithms give different results, and it stands to reason that
Android's will be optimized more for space/time than would, say, all
of Photoshop's. Plus, Android's scaling algorithms might change over
time (or conceivably be modified by OEMs) -- scaling them yourself
puts *you* in control over the final image look and feel. While that
may be overkill for many apps, there will be some whose designers want
that level of control.

-- 
Mark Murphy (a Commons Guy)
http://commonsware.com | http://github.com/commonsguy
http://commonsware.com/blog | http://twitter.com/commonsguy

_The Busy Coder's Guide to Android Development_ Version 3.8 Available!

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