com.facebook.litho.widget

Interface ViewportInfo

All Known Subinterfaces:

HasStickyHeader, LayoutInfo

All Known Implementing Classes:

GridLayoutInfo, LinearLayoutInfo, RecyclerBinder, StaggeredGridLayoutInfo

public interface ViewportInfo

An implementation of this interface will provide both the androidx.recyclerview.widget.RecyclerView's current visible views position and the total number of items in its androidx.recyclerview.widget.RecyclerView.Adapter.

Nested Class Summary

Nested Classes

Modifier and Type	Interface and Description
static interface	ViewportInfo.State
static interface	ViewportInfo.ViewportChanged Implement this interface to be notified of Viewport changes from the Binder

Method Summary

Modifier and Type	Method and Description
int	findFirstFullyVisibleItemPosition()
int	findFirstVisibleItemPosition()
int	findLastFullyVisibleItemPosition()
int	findLastVisibleItemPosition()
int	getItemCount()

Method Detail

findFirstVisibleItemPosition

int findFirstVisibleItemPosition()

Returns:

the adapter position of the first visible view.

findLastVisibleItemPosition

int findLastVisibleItemPosition()

Returns:

the adapter position of the last visible view.

findFirstFullyVisibleItemPosition

int findFirstFullyVisibleItemPosition()

Returns:

the adapter position of the first fully visible view.

findLastFullyVisibleItemPosition

int findLastFullyVisibleItemPosition()

Returns:

the adapter position of the last fully visible view.

getItemCount

int getItemCount()

Returns:

total number of items in the adapter