RecyclerView.SmoothScroller.ScrollVectorProvider
public interface RecyclerView.SmoothScroller.ScrollVectorProvider
LinearLayoutManager |
A |
StaggeredGridLayoutManager |
A LayoutManager that lays out children in a staggered grid formation. |
GridLayoutManager |
A |
WearableLinearLayoutManager |
This wear-specific implementation of |
An interface which is optionally implemented by custom RecyclerView.LayoutManager to provide a hint to a SmoothScroller about the location of the target position.
Summary
Public methods |
|
|---|---|
abstract @Nullable PointF |
computeScrollVectorForPosition(int targetPosition)Should calculate the vector that points to the direction where the target position can be found. |
Public methods
computeScrollVectorForPosition
abstract @Nullable PointF computeScrollVectorForPosition(int targetPosition)
Should calculate the vector that points to the direction where the target position can be found.
This method is used by the LinearSmoothScroller to initiate a scroll towards the target position.
The magnitude of the vector is not important. It is always normalized before being used by the LinearSmoothScroller.
LayoutManager should not check whether the position exists in the adapter or not.
| Parameters | |
|---|---|
int targetPosition |
the target position to which the returned vector should point |