Thanks for the tip!! On Sep 16, 4:32 pm, David Brackeen <[email protected]> wrote: > I ran into a problem of slow builds and thought I'd share the > solution. > > I'm porting an iPhone app to Android, and as soon as I added the > images to the project (400+ pngs), build time went from about 5 > seconds to about 40 seconds. This is on a new machine, quad core i7, > 8GB ram. > > The resource processor (aapt) was to blame. Every time I made a change > to a layout xml file and hit save - bam, wait 40 seconds. > > After running aapt in verbose mode, it was obvious what was happening > - aapt does png optimization every single time. Optimization is slow, > and aapt only used one core. So it makes sense to turn this > optimization off. Just run optipng once, no need to optimize every > build or every time I save a layout xml file. > > So how do you turn png optimization off? You can't. There is no > Eclipse setting, no command line option for aapt. > > Digging around the aapt source, I noticed something funny though - it > only optimizes images in the "drawable" folders that end in > ".png".http://android.git.kernel.org/?p=platform/frameworks/base.git;a=blob;... > > Solution: rename all the pngs to end in uppercase ".PNG". Then aapt > simply copies the files without optimizing. My build time is back to 5 > seconds! > > (Caveat: this won't work for nine-patch files - they still need to end > in lowercase ".9.png".)
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