See how to build complex designs for your Compose layouts, focusing on layout phase and constraints, subcompose layouts, and intrinsic measurements.
Key points
- The layout phase is the phase of Compose where element sizing and positioning is defined.
- During the layout phase, each element in the UI tree measures its children, enabling the parent to decide its own size and placing the children in the available 2D space.
- To build a custom layout, call the
Layoutcomposable, which accepts the composable content as its children. - Subcomposition enables lazy components to add content on demand while scrolling.
- Subcomposed layouts can have an impact on performance. Use this approach when at least one child's composition depends on the result of another child's measurement.
- Intrinsic measurements let you query children before they're measured.
Parent collections
Display a list or grid
Lists and grids allow your app to display collections in a
visually pleasing form that's easy for users to consume.
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