hmos-multidevice-fold-state

HarmonyOS foldable device adaptation is handled through a declarative scene and resource index that validates and routes tasks involving crease avoidance, hover layouts, and FoldStatus mapping to ensure consistent UX constraints across device form factors.

Video playback continuity during folding and unfolding is maintained by applying official hover-state interaction patterns, keeping the video in the upper screen and controls in the lower screen during hover mode through state-aware task routing.

State-aware routing automatically directs foldable adaptation tasks based on FoldStatus, display modes, and device form factors like F, M, and G to apply precise crease avoidance and layout management constraints.

Multi-fold state mapping and capability boundaries are standardized by validating device-specific constraints and verification matrices through a declarative framework, ensuring consistent behavior across all foldable form factors.

Crease avoidance patterns are needed when developing applications for foldable devices requiring hover-state interactions, such as upper-display and lower-control layouts, to prevent UI elements from being obscured by the physical screen crease.

Foldable device layouts break during state transitions when cross-state continuity and official UX standards for crease avoidance are not applied, which this framework resolves by routing tasks through a declarative scene and resource index.