Cool ConstraintLayout

on YouTube ↗44m

" summary

Shows concrete claims and working demos: ConstraintLayout flattens hierarchies to improve performance with usually a single measure/layout pass except for match_constraint, includes a UI Builder, supports dimension ratio for easy squares, guidelines for keylines, chains (packed/spread/weighted) for distribution, and programmatic constraintSet+TransitionManager swaps that animate between saved layouts. Examples include a photo‑editor handle layout, RecyclerView item expand and a custom ViewGroup replacement, code lives on GitHub and the demos work as shown.

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" chapters (10)

1. 0:00Intro
2. 1:16ConstraintLayout
3. 3:45How does it work
4. 6:54Constraints
5. 13:07Constraint Dimensions
6. 15:31Relative Layout
7. 21:34Chain Layout
8. 28:00ConstraintSet
9. 32:36Custom View Groups
10. 38:20Layout Hierarchy

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