ConstraintLayout, now and future
summary
ConstraintLayout 1.0 features and 1.1 additions are explained with concrete mechanics: barriers and groups for non-hierarchical grouping, placeholder and circular constraints for dynamic positioning, and chains/guidelines/ratio for layout structure. The design surface tools—inference and right‑click editing—are demoed, plus converting RelativeLayouts, performance numbers showing flatter hierarchies are faster, and constraint sets for animated state switching that reuse XML layouts. Examples include RecyclerView view‑holders, custom component subclassing, and upcoming decorators and view‑group helpers.
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chapters (16)
- 0:00Intro
- 3:32RelativeLayout
- 6:20Design Surface
- 11:11Performance
- 19:42Barriers
- 23:29Concrete example
- 27:04Constraint Sets
- 31:24Examples
- 38:31Benefits
- 38:49Tricky Data
- 42:12Modularity
- 43:29Always add
- 44:30Chains
- 44:52Custom Components
- 47:34Conclusion
- 49:51Documentation
