Mobiconf 2018: Nicola Corti, Yelp Inc.
summary
Button is a TextView plus a background drawable (framework Button ~182 LOC, MaterialButton ~800 LOC), default background uses an inset (4dp sides, 6dp top/bottom) so shadows have space, elevation defaults to 2dp and shadows come from two lights (ambient + key). Coloring requires a ColorStateList or theme overlay (backgroundTint alone breaks disabled states), and elevation changes are driven by a StateListAnimator, so Yelp builds small theming utilities to generate stateful colors and animators for consistent buttons across apps.
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chapters (12)
- 0:00Start
- 0:24Yelp Mission
- 0:39About me
- 4:13Skeuomorphic Ul
- 5:26Flat UI
- 6:29Almost Flat (aka Flat 2.0)
- 14:37What's actually an Android Button?
- 22:07Typography
- 24:00Hierarchy
- 28:45Secondary color?
- 30:45All works fine but...?
- 32:51Feedback
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