RecyclerView.Recycler

public void bindViewToPosition(@NonNull View view, int position)

Binds the given View to the position. The View can be a View previously retrieved via getViewForPosition or created by onCreateViewHolder.

Generally, a LayoutManager should acquire its views via getViewForPosition and let the RecyclerView handle caching. This is a helper method for LayoutManager who wants to handle its own recycling logic.

Note that, getViewForPosition already binds the View to the position so you don't need to call this method unless you want to bind this View to another position.

public void clear()

Clear scrap views out of this recycler. Detached views contained within a recycled view pool will remain.

public int convertPreLayoutPositionToPostLayout(int position)

RecyclerView provides artificial position range (item count) in pre-layout state and automatically maps these positions to Adapter positions when getViewForPosition or bindViewToPosition is called.

Usually, LayoutManager does not need to worry about this. However, in some cases, your LayoutManager may need to call some custom component with item positions in which case you need the actual adapter position instead of the pre layout position. You can use this method to convert a pre-layout position to adapter (post layout) position.

Note that if the provided position belongs to a deleted ViewHolder, this method will return -1.

Calling this method in post-layout state returns the same value back.

public @NonNull List<RecyclerView.ViewHolder> getScrapList()

Returns an unmodifiable list of ViewHolders that are currently in the scrap list.

public @NonNull View getViewForPosition(int position)

Obtain a view initialized for the given position. This method should be used by LayoutManager implementations to obtain views to represent data from an Adapter.

The Recycler may reuse a scrap or detached view from a shared pool if one is available for the correct view type. If the adapter has not indicated that the data at the given position has changed, the Recycler will attempt to hand back a scrap view that was previously initialized for that data without rebinding.

public void recycleView(@NonNull View view)

Recycle a detached view. The specified view will be added to a pool of views for later rebinding and reuse.

A view must be fully detached (removed from parent) before it may be recycled. If the View is scrapped, it will be removed from scrap list.

public void setViewCacheSize(int viewCount)

Set the maximum number of detached, valid views we should retain for later use.