# RecyclerView.LayoutManager.LayoutPrefetchRegistry

added in[version 25.1.0](https://developer.android.com/topic/libraries/support-library/revisions)  
belongs to Maven artifact com.android.support:recyclerview-v7:28.0.0-alpha1  

# RecyclerView.LayoutManager.LayoutPrefetchRegistry

| This package is part of the Android[support library](https://developer.android.com/topic/libraries/support-library)which is no longer maintained. The support library has been superseded by[AndroidX](https://developer.android.com/jetpack/androidx)which is part of[Jetpack](https://developer.android.com/jetpack). We recommend using the AndroidX libraries in all new projects. You should also consider[migrating](https://developer.android.com/jetpack/androidx/migrate)existing projects to AndroidX. To find the AndroidX class that maps to this deprecated class, see the AndroidX support library[class mappings](https://developer.android.com/jetpack/androidx/migrate/class-mappings).

`
public
static


interface
RecyclerView.LayoutManager.LayoutPrefetchRegistry
`  
`


`

|-----------------------------------------------------------------------------|
| android.support.v7.widget.RecyclerView.LayoutManager.LayoutPrefetchRegistry |

<br />

*** ** * ** ***

Interface for LayoutManagers to request items to be prefetched, based on position, with specified distance from viewport, which indicates priority.  
**See also:**

- [collectAdjacentPrefetchPositions(int, int, State, LayoutPrefetchRegistry)](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutManager#collectAdjacentPrefetchPositions(int, int, android.support.v7.widget.RecyclerView.State, android.support.v7.widget.RecyclerView.LayoutManager.LayoutPrefetchRegistry))
- [collectInitialPrefetchPositions(int, LayoutPrefetchRegistry)](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutManager#collectInitialPrefetchPositions(int, android.support.v7.widget.RecyclerView.LayoutManager.LayoutPrefetchRegistry))

## Summary

|                                                                                                                                                        ### Public methods                                                                                                                                                        ||
|------------------|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| ` abstract void` | ` `[addPosition](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutManager.LayoutPrefetchRegistry#addPosition(int, int))`(int layoutPosition, int pixelDistance) ` Requests an an item to be prefetched, based on position, with a specified distance, indicating priority. |

## Public methods

### addPosition

added in[version 25.1.0](https://developer.android.com/topic/libraries/support-library/revisions)  

```
void addPosition (int layoutPosition, 
                int pixelDistance)
```

Requests an an item to be prefetched, based on position, with a specified distance, indicating priority.

<br />

|                                                     Parameters                                                      ||
|------------------|---------------------------------------------------------------------------------------------------|
| `layoutPosition` | `int`: Position of the item to prefetch. <br />                                                   |
| `pixelDistance`  | `int`: Distance from the current viewport to the bounds of the item, must be non-negative. <br /> |

-

  ## Annotations

  - [RecyclerView.EdgeEffectFactory.EdgeDirection](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.EdgeEffectFactory.EdgeDirection)
  - [RecyclerView.ItemAnimator.AdapterChanges](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.ItemAnimator.AdapterChanges)
-

  ## Interfaces

  - [ActionMenuView.OnMenuItemClickListener](https://developer.android.com/reference/android/support/v7/widget/ActionMenuView.OnMenuItemClickListener)
  - [PopupMenu.OnDismissListener](https://developer.android.com/reference/android/support/v7/widget/PopupMenu.OnDismissListener)
  - [PopupMenu.OnMenuItemClickListener](https://developer.android.com/reference/android/support/v7/widget/PopupMenu.OnMenuItemClickListener)
  - [RecyclerView.ChildDrawingOrderCallback](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.ChildDrawingOrderCallback)
  - [RecyclerView.ItemAnimator.ItemAnimatorFinishedListener](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.ItemAnimator.ItemAnimatorFinishedListener)
  - [RecyclerView.LayoutManager.LayoutPrefetchRegistry](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutManager.LayoutPrefetchRegistry)
  - [RecyclerView.OnChildAttachStateChangeListener](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.OnChildAttachStateChangeListener)
  - [RecyclerView.OnItemTouchListener](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.OnItemTouchListener)
  - [RecyclerView.RecyclerListener](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.RecyclerListener)
  - [RecyclerView.SmoothScroller.ScrollVectorProvider](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.SmoothScroller.ScrollVectorProvider)
  - [SearchView.OnCloseListener](https://developer.android.com/reference/android/support/v7/widget/SearchView.OnCloseListener)
  - [SearchView.OnQueryTextListener](https://developer.android.com/reference/android/support/v7/widget/SearchView.OnQueryTextListener)
  - [SearchView.OnSuggestionListener](https://developer.android.com/reference/android/support/v7/widget/SearchView.OnSuggestionListener)
  - [ShareActionProvider.OnShareTargetSelectedListener](https://developer.android.com/reference/android/support/v7/widget/ShareActionProvider.OnShareTargetSelectedListener)
  - [ThemedSpinnerAdapter](https://developer.android.com/reference/android/support/v7/widget/ThemedSpinnerAdapter)
  - [Toolbar.OnMenuItemClickListener](https://developer.android.com/reference/android/support/v7/widget/Toolbar.OnMenuItemClickListener)
-

  ## Classes

  - [ActionMenuView](https://developer.android.com/reference/android/support/v7/widget/ActionMenuView)
  - [ActionMenuView.LayoutParams](https://developer.android.com/reference/android/support/v7/widget/ActionMenuView.LayoutParams)
  - [AppCompatAutoCompleteTextView](https://developer.android.com/reference/android/support/v7/widget/AppCompatAutoCompleteTextView)
  - [AppCompatButton](https://developer.android.com/reference/android/support/v7/widget/AppCompatButton)
  - [AppCompatCheckBox](https://developer.android.com/reference/android/support/v7/widget/AppCompatCheckBox)
  - [AppCompatCheckedTextView](https://developer.android.com/reference/android/support/v7/widget/AppCompatCheckedTextView)
  - [AppCompatEditText](https://developer.android.com/reference/android/support/v7/widget/AppCompatEditText)
  - [AppCompatImageButton](https://developer.android.com/reference/android/support/v7/widget/AppCompatImageButton)
  - [AppCompatImageView](https://developer.android.com/reference/android/support/v7/widget/AppCompatImageView)
  - [AppCompatMultiAutoCompleteTextView](https://developer.android.com/reference/android/support/v7/widget/AppCompatMultiAutoCompleteTextView)
  - [AppCompatRadioButton](https://developer.android.com/reference/android/support/v7/widget/AppCompatRadioButton)
  - [AppCompatRatingBar](https://developer.android.com/reference/android/support/v7/widget/AppCompatRatingBar)
  - [AppCompatSeekBar](https://developer.android.com/reference/android/support/v7/widget/AppCompatSeekBar)
  - [AppCompatSpinner](https://developer.android.com/reference/android/support/v7/widget/AppCompatSpinner)
  - [AppCompatTextView](https://developer.android.com/reference/android/support/v7/widget/AppCompatTextView)
  - [CardView](https://developer.android.com/reference/android/support/v7/widget/CardView)
  - [DefaultItemAnimator](https://developer.android.com/reference/android/support/v7/widget/DefaultItemAnimator)
  - [DividerItemDecoration](https://developer.android.com/reference/android/support/v7/widget/DividerItemDecoration)
  - [GridLayout](https://developer.android.com/reference/android/support/v7/widget/GridLayout)
  - [GridLayout.Alignment](https://developer.android.com/reference/android/support/v7/widget/GridLayout.Alignment)
  - [GridLayout.LayoutParams](https://developer.android.com/reference/android/support/v7/widget/GridLayout.LayoutParams)
  - [GridLayout.Spec](https://developer.android.com/reference/android/support/v7/widget/GridLayout.Spec)
  - [GridLayoutManager](https://developer.android.com/reference/android/support/v7/widget/GridLayoutManager)
  - [GridLayoutManager.DefaultSpanSizeLookup](https://developer.android.com/reference/android/support/v7/widget/GridLayoutManager.DefaultSpanSizeLookup)
  - [GridLayoutManager.LayoutParams](https://developer.android.com/reference/android/support/v7/widget/GridLayoutManager.LayoutParams)
  - [GridLayoutManager.SpanSizeLookup](https://developer.android.com/reference/android/support/v7/widget/GridLayoutManager.SpanSizeLookup)
  - [LinearLayoutCompat](https://developer.android.com/reference/android/support/v7/widget/LinearLayoutCompat)
  - [LinearLayoutCompat.LayoutParams](https://developer.android.com/reference/android/support/v7/widget/LinearLayoutCompat.LayoutParams)
  - [LinearLayoutManager](https://developer.android.com/reference/android/support/v7/widget/LinearLayoutManager)
  - [LinearLayoutManager.LayoutChunkResult](https://developer.android.com/reference/android/support/v7/widget/LinearLayoutManager.LayoutChunkResult)
  - [LinearSmoothScroller](https://developer.android.com/reference/android/support/v7/widget/LinearSmoothScroller)
  - [LinearSnapHelper](https://developer.android.com/reference/android/support/v7/widget/LinearSnapHelper)
  - [ListPopupWindow](https://developer.android.com/reference/android/support/v7/widget/ListPopupWindow)
  - [OrientationHelper](https://developer.android.com/reference/android/support/v7/widget/OrientationHelper)
  - [PagerSnapHelper](https://developer.android.com/reference/android/support/v7/widget/PagerSnapHelper)
  - [PopupMenu](https://developer.android.com/reference/android/support/v7/widget/PopupMenu)
  - [RecyclerView](https://developer.android.com/reference/android/support/v7/widget/RecyclerView)
  - [RecyclerView.Adapter](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.Adapter)
  - [RecyclerView.AdapterDataObserver](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.AdapterDataObserver)
  - [RecyclerView.EdgeEffectFactory](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.EdgeEffectFactory)
  - [RecyclerView.ItemAnimator](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.ItemAnimator)
  - [RecyclerView.ItemAnimator.ItemHolderInfo](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.ItemAnimator.ItemHolderInfo)
  - [RecyclerView.ItemDecoration](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.ItemDecoration)
  - [RecyclerView.LayoutManager](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutManager)
  - [RecyclerView.LayoutManager.Properties](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutManager.Properties)
  - [RecyclerView.LayoutParams](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutParams)
  - [RecyclerView.OnFlingListener](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.OnFlingListener)
  - [RecyclerView.OnScrollListener](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.OnScrollListener)
  - [RecyclerView.RecycledViewPool](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.RecycledViewPool)
  - [RecyclerView.Recycler](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.Recycler)
  - [RecyclerView.SimpleOnItemTouchListener](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.SimpleOnItemTouchListener)
  - [RecyclerView.SmoothScroller](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.SmoothScroller)
  - [RecyclerView.SmoothScroller.Action](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.SmoothScroller.Action)
  - [RecyclerView.State](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.State)
  - [RecyclerView.ViewCacheExtension](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.ViewCacheExtension)
  - [RecyclerView.ViewHolder](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.ViewHolder)
  - [RecyclerViewAccessibilityDelegate](https://developer.android.com/reference/android/support/v7/widget/RecyclerViewAccessibilityDelegate)
  - [RecyclerViewAccessibilityDelegate.ItemDelegate](https://developer.android.com/reference/android/support/v7/widget/RecyclerViewAccessibilityDelegate.ItemDelegate)
  - [SearchView](https://developer.android.com/reference/android/support/v7/widget/SearchView)
  - [ShareActionProvider](https://developer.android.com/reference/android/support/v7/widget/ShareActionProvider)
  - [SimpleItemAnimator](https://developer.android.com/reference/android/support/v7/widget/SimpleItemAnimator)
  - [SnapHelper](https://developer.android.com/reference/android/support/v7/widget/SnapHelper)
  - [StaggeredGridLayoutManager](https://developer.android.com/reference/android/support/v7/widget/StaggeredGridLayoutManager)
  - [StaggeredGridLayoutManager.LayoutParams](https://developer.android.com/reference/android/support/v7/widget/StaggeredGridLayoutManager.LayoutParams)
  - [SwitchCompat](https://developer.android.com/reference/android/support/v7/widget/SwitchCompat)
  - [ThemedSpinnerAdapter.Helper](https://developer.android.com/reference/android/support/v7/widget/ThemedSpinnerAdapter.Helper)
  - [Toolbar](https://developer.android.com/reference/android/support/v7/widget/Toolbar)
  - [Toolbar.LayoutParams](https://developer.android.com/reference/android/support/v7/widget/Toolbar.LayoutParams)
  - [Toolbar.SavedState](https://developer.android.com/reference/android/support/v7/widget/Toolbar.SavedState)
  - [TooltipCompat](https://developer.android.com/reference/android/support/v7/widget/TooltipCompat)