Lists are continuous, vertical indexes of elements. Use ScalingLazyColumn to create lists on Wear OS.
ScalingLazyColumn is a customization of LazyColumn that's built specifically for Wear OS. Lists offer scaling and transparency, which allows content to shrink and fade at the top and bottom of the screen to help users see what to focus on. Lists are anchored on the center of the screen, which gives additional emphasis to the items in the middle of the list.
Lists can contain items of fixed or variable height. List content should have margin enough to accommodate for circular screens.
Padding
Standardized Paddings are used when creating a list depending on the element. If further vertical padding is needed for more complex lists, spacing is set in multiples of 4 dp for consistency.
Between sections
Padding between top, middle and bottom section should be set to 16 dp.
Between titles and content
Padding between top, middle and bottom section should be set to 12 dp.
Between slots
Padding between slots in the middle section should be set to 16 dp.
Between groups
Padding between groups within a slot should be set to 8 dp.
Between elements
Padding between elements within a group should be set to 4 dp.
Snapping behavior
To give emphasis to a list item when scrolling, use snapping. Use snapping when items are tall but not taller than the screen.
Snapping behavior comes in two forms. ItemCenter uses the center of the item as a reference point. ItemStart uses the edge of the item as a reference point. Use the first to center one item on the screen, use the second to center two items on the screen. Set this behavior using the anchorType parameter.
For further control over the snapping behavior in a list, set
flingBehavior to ScalingLazyColumnDefaults.snapFlingBehavior
and rotaryScrollableBehavior to RotaryScrollableDefaults.snapBehavior.
Usage
See the following examples of how to use lists on watches.
Adaptive layouts
The following images show several examples of adaptive layouts. For implementation guidance, visit the develop for different screen sizes page.
Responsive behavior
Lists components stretch to fill the available width on larger displays.
Top margins
Top margins vary depending on which elements are in the top section.
List starts with Title
List starts with 1 or 2+ buttons
List starts with other elements
Bottom margins
Bottom margins vary depending on which elements are in the bottom section.
List ends with buttons
List ends with other elements
Side margins
Side margins uses a standard percentage of 5.2% across all list types to ensure scalability on larger displays.
Internal margins
Titles
There’s an added 7.3% internal margin to ensure titles don’t clip.
Bottom buttons
Bottom buttons fill the available width past the 225 breakpoint. To keep visual hierarchy, there’s an added internal padding of 14.56% on larger screens.
