I have to say I'm always a little bit surprised by people amazed by some fairly simple-to-reproduce UI tricks.

The latest Newsstand app uses a nice UI trick to translate the magazine icon to the ActionBar. Everybody is wondering how it works. It's actually quite simple to implement because it ALWAYS relies on the same technique called synchronized scrolling:

  - Set a scroll listener on a scrollable container (ListView, ScrollView, etc.)
  - Interpolate the current scrolling and use the value to set[Translation|Rotation|Alpha|...] on a particular View
  - And that's it ...
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