Found the solution to this: ViewPager.onMeasure() handles measuring its 
children, which I wasn't accounting for. I changed my onMeasure 
implementation to simply pass super.onMeasure() some new MeasureSpecs with 
the size I calculate, and presto: Great success.

On Friday, October 12, 2012 1:23:23 AM UTC-7, Chris Sarbora wrote:
>
> I'm trying to develop a ViewPager subclass that, among other things, 
> limits itself to a specific aspect ratio (2:1 W:H), and accepts a 
> BaseAdapter instead of only a PagerAdapter.
>
> I've built a PagerAdapter implementation that can take a BaseAdapter and 
> translate to/from, without any apparent problems. No leaking, decent view 
> recycling, etc.
>
> However, when I implement onMeasure() in the ViewPager subclass so that I 
> can start toying with settings its size, suddenly the ViewPager starts 
> "losing" pages. It will continue to scroll back and forth, but the View 
> returned by the PagerAdapter isn't displayed. I've tried disabling the view 
> recycling, and tinkering around with various other behaviors, to no avail. 
> I'm not really sure where to go from here, as I can't figure out how 
> onMeasure and the Adapter would be remotely related... but it's absolute: 
> if I use my custom onMeasure, pages get lost. If I comment onMeasure out, 
> everything works peachy.
>
> Source is at https://github.com/tophyr/custompager - I'd be indebted to 
> anyone who takes a peek and gives me some insight as to what's going on.
>
> Thanks!
> Chris
>

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