# GridLayoutManager
added in[version 22.1.0](https://developer.android.com/topic/libraries/support-library/revisions)
belongs to Maven artifact com.android.support:recyclerview-v7:28.0.0-alpha1
Summary:[Nested Classes](https://developer.android.com/reference/android/support/v7/widget/GridLayoutManager#nestedclasses)\|[XML Attrs](https://developer.android.com/reference/android/support/v7/widget/GridLayoutManager#lattrs)\|[Inherited XML Attrs](https://developer.android.com/reference/android/support/v7/widget/GridLayoutManager#inhattrs)\|[Constants](https://developer.android.com/reference/android/support/v7/widget/GridLayoutManager#constants)\|[Inherited Constants](https://developer.android.com/reference/android/support/v7/widget/GridLayoutManager#inhconstants)\|[Ctors](https://developer.android.com/reference/android/support/v7/widget/GridLayoutManager#pubctors)\|[Methods](https://developer.android.com/reference/android/support/v7/widget/GridLayoutManager#pubmethods)\|[Inherited Methods](https://developer.android.com/reference/android/support/v7/widget/GridLayoutManager#inhmethods)\|[\[Expand All\]](https://developer.android.com/reference/android/support/v7/widget/GridLayoutManager#)
# GridLayoutManager
| 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package is part of the Android[support library](https://developer.android.com/topic/libraries/support-library)which is no longer maintained. The support library has been superseded by[AndroidX](https://developer.android.com/jetpack/androidx)which is part of[Jetpack](https://developer.android.com/jetpack).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
class
GridLayoutManager
`
`
``
``
extends `[LinearLayoutManager](https://developer.android.com/reference/android/support/v7/widget/LinearLayoutManager)`
``
`
|---|---|---|---------------------------------------------|
| java.lang.Object ||||
| ↳ | [android.support.v7.widget.RecyclerView.LayoutManager](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutManager) |||
| | ↳ | [android.support.v7.widget.LinearLayoutManager](https://developer.android.com/reference/android/support/v7/widget/LinearLayoutManager) ||
| | | ↳ | android.support.v7.widget.GridLayoutManager |
*** ** * ** ***
A[RecyclerView.LayoutManager](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutManager)implementations that lays out items in a grid.
By default, each item occupies 1 span. You can change it by providing a custom[GridLayoutManager.SpanSizeLookup](https://developer.android.com/reference/android/support/v7/widget/GridLayoutManager.SpanSizeLookup)instance via[setSpanSizeLookup(SpanSizeLookup)](https://developer.android.com/reference/android/support/v7/widget/GridLayoutManager#setSpanSizeLookup(android.support.v7.widget.GridLayoutManager.SpanSizeLookup)).
## Summary
| ### Nested classes ||
|----------|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| ` class` | [GridLayoutManager.DefaultSpanSizeLookup](https://developer.android.com/reference/android/support/v7/widget/GridLayoutManager.DefaultSpanSizeLookup) Default implementation for[GridLayoutManager.SpanSizeLookup](https://developer.android.com/reference/android/support/v7/widget/GridLayoutManager.SpanSizeLookup). |
| ` class` | [GridLayoutManager.LayoutParams](https://developer.android.com/reference/android/support/v7/widget/GridLayoutManager.LayoutParams) LayoutParams used by GridLayoutManager. |
| ` class` | [GridLayoutManager.SpanSizeLookup](https://developer.android.com/reference/android/support/v7/widget/GridLayoutManager.SpanSizeLookup) A helper class to provide the number of spans each item occupies. |
| ### XML attributes ||
|---------------------------------------------------------------------------------------------------------------------------------------------|---|
| [`RecyclerView_spanCount`](https://developer.android.com/reference/android/support/v7/widget/GridLayoutManager#attr_RecyclerView_spanCount) | |
| ### Inherited XML attributes |
|------------------------------|---|
| [](https://developer.android.com/reference/android/support/v7/widget/GridLayoutManager#)From class` `[android.support.v7.widget.LinearLayoutManager](https://developer.android.com/reference/android/support/v7/widget/LinearLayoutManager)` ` |-------------------------------------------------------------------------------------------------------------------------------------------------------------------|---| | [`RecyclerView_android_orientation`](https://developer.android.com/reference/android/support/v7/widget/LinearLayoutManager#attr_RecyclerView_android_orientation) | | | [`RecyclerView_reverseLayout`](https://developer.android.com/reference/android/support/v7/widget/LinearLayoutManager#attr_RecyclerView_reverseLayout) | | | [`RecyclerView_stackFromEnd`](https://developer.android.com/reference/android/support/v7/widget/LinearLayoutManager#attr_RecyclerView_stackFromEnd) | | ||
| [](https://developer.android.com/reference/android/support/v7/widget/GridLayoutManager#)From class` `[android.support.v7.widget.RecyclerView.LayoutManager](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutManager)` ` |--------------------------------------------------------------------------------------------------------------------------------------------------------------------------|---| | [`RecyclerView_android_orientation`](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutManager#attr_RecyclerView_android_orientation) | | | [`RecyclerView_reverseLayout`](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutManager#attr_RecyclerView_reverseLayout) | | | [`RecyclerView_spanCount`](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutManager#attr_RecyclerView_spanCount) | | | [`RecyclerView_stackFromEnd`](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutManager#attr_RecyclerView_stackFromEnd) | | ||
| ### Constants ||
|-------|-------------------------------------------------------------------------------------------------------------------------------------|
| `int` | [DEFAULT_SPAN_COUNT](https://developer.android.com/reference/android/support/v7/widget/GridLayoutManager#DEFAULT_SPAN_COUNT)
|
| ### Inherited constants |
|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| [](https://developer.android.com/reference/android/support/v7/widget/GridLayoutManager#)From class` `[android.support.v7.widget.LinearLayoutManager](https://developer.android.com/reference/android/support/v7/widget/LinearLayoutManager)` ` |-------|-------------------------------------------------------------------------------------------------------------------------------| | `int` | [HORIZONTAL](https://developer.android.com/reference/android/support/v7/widget/LinearLayoutManager#HORIZONTAL)
| | `int` | [INVALID_OFFSET](https://developer.android.com/reference/android/support/v7/widget/LinearLayoutManager#INVALID_OFFSET)
| | `int` | [VERTICAL](https://developer.android.com/reference/android/support/v7/widget/LinearLayoutManager#VERTICAL)
| |
| ### Public constructors ||
|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|---|
| ` `[GridLayoutManager](https://developer.android.com/reference/android/support/v7/widget/GridLayoutManager#GridLayoutManager(android.content.Context, android.util.AttributeSet, int, int))`(`[Context](https://developer.android.com/reference/android/content/Context.html)` context, `[AttributeSet](https://developer.android.com/reference/android/util/AttributeSet.html)` attrs, int defStyleAttr, int defStyleRes) ` Constructor used when layout manager is set in XML by RecyclerView attribute "layoutManager". |
| ` `[GridLayoutManager](https://developer.android.com/reference/android/support/v7/widget/GridLayoutManager#GridLayoutManager(android.content.Context, int))`(`[Context](https://developer.android.com/reference/android/content/Context.html)` context, int spanCount) ` Creates a vertical GridLayoutManager |
| ` `[GridLayoutManager](https://developer.android.com/reference/android/support/v7/widget/GridLayoutManager#GridLayoutManager(android.content.Context, int, int, boolean))`(`[Context](https://developer.android.com/reference/android/content/Context.html)` context, int spanCount, int orientation, boolean reverseLayout) ` |
| ### Public methods ||
|-------------------------------------------------------------------------------------------------------------------------------------------|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| ` boolean` | ` `[checkLayoutParams](https://developer.android.com/reference/android/support/v7/widget/GridLayoutManager#checkLayoutParams(android.support.v7.widget.RecyclerView.LayoutParams))`(`[RecyclerView.LayoutParams](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutParams)` lp) ` Determines the validity of the supplied LayoutParams object. |
| ` `[RecyclerView.LayoutParams](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutParams) | ` `[generateDefaultLayoutParams](https://developer.android.com/reference/android/support/v7/widget/GridLayoutManager#generateDefaultLayoutParams())`() ` Create a default`LayoutParams`object for a child of the RecyclerView. |
| ` `[RecyclerView.LayoutParams](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutParams) | ` `[generateLayoutParams](https://developer.android.com/reference/android/support/v7/widget/GridLayoutManager#generateLayoutParams(android.content.Context, android.util.AttributeSet))`(`[Context](https://developer.android.com/reference/android/content/Context.html)` c, `[AttributeSet](https://developer.android.com/reference/android/util/AttributeSet.html)` attrs) ` Create a LayoutParams object suitable for this LayoutManager from an inflated layout resource. |
| ` `[RecyclerView.LayoutParams](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutParams) | ` `[generateLayoutParams](https://developer.android.com/reference/android/support/v7/widget/GridLayoutManager#generateLayoutParams(android.view.ViewGroup.LayoutParams))`(`[ViewGroup.LayoutParams](https://developer.android.com/reference/android/view/ViewGroup.LayoutParams.html)` lp) ` Create a LayoutParams object suitable for this LayoutManager, copying relevant values from the supplied LayoutParams object if possible. |
| ` int` | ` `[getColumnCountForAccessibility](https://developer.android.com/reference/android/support/v7/widget/GridLayoutManager#getColumnCountForAccessibility(android.support.v7.widget.RecyclerView.Recycler, android.support.v7.widget.RecyclerView.State))`(`[RecyclerView.Recycler](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.Recycler)` recycler, `[RecyclerView.State](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.State)` state) ` Returns the number of columns for accessibility. |
| ` int` | ` `[getRowCountForAccessibility](https://developer.android.com/reference/android/support/v7/widget/GridLayoutManager#getRowCountForAccessibility(android.support.v7.widget.RecyclerView.Recycler, android.support.v7.widget.RecyclerView.State))`(`[RecyclerView.Recycler](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.Recycler)` recycler, `[RecyclerView.State](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.State)` state) ` Returns the number of rows for accessibility. |
| ` int` | ` `[getSpanCount](https://developer.android.com/reference/android/support/v7/widget/GridLayoutManager#getSpanCount())`() ` Returns the number of spans laid out by this grid. |
| ` `[GridLayoutManager.SpanSizeLookup](https://developer.android.com/reference/android/support/v7/widget/GridLayoutManager.SpanSizeLookup) | ` `[getSpanSizeLookup](https://developer.android.com/reference/android/support/v7/widget/GridLayoutManager#getSpanSizeLookup())`() ` Returns the current[GridLayoutManager.SpanSizeLookup](https://developer.android.com/reference/android/support/v7/widget/GridLayoutManager.SpanSizeLookup)used by the GridLayoutManager. |
| ` `[View](https://developer.android.com/reference/android/view/View.html) | ` `[onFocusSearchFailed](https://developer.android.com/reference/android/support/v7/widget/GridLayoutManager#onFocusSearchFailed(android.view.View, int, android.support.v7.widget.RecyclerView.Recycler, android.support.v7.widget.RecyclerView.State))`(`[View](https://developer.android.com/reference/android/view/View.html)` focused, int focusDirection, `[RecyclerView.Recycler](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.Recycler)` recycler, `[RecyclerView.State](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.State)` state) ` Called when searching for a focusable view in the given direction has failed for the current content of the RecyclerView. |
| ` void` | ` `[onInitializeAccessibilityNodeInfoForItem](https://developer.android.com/reference/android/support/v7/widget/GridLayoutManager#onInitializeAccessibilityNodeInfoForItem(android.support.v7.widget.RecyclerView.Recycler, android.support.v7.widget.RecyclerView.State, android.view.View, android.support.v4.view.accessibility.AccessibilityNodeInfoCompat))`(`[RecyclerView.Recycler](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.Recycler)` recycler, `[RecyclerView.State](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.State)` state, `[View](https://developer.android.com/reference/android/view/View.html)` host, `[AccessibilityNodeInfoCompat](https://developer.android.com/reference/android/support/v4/view/accessibility/AccessibilityNodeInfoCompat)` info) ` Called by the AccessibilityDelegate when the accessibility information for a specific item should be populated. |
| ` void` | ` `[onItemsAdded](https://developer.android.com/reference/android/support/v7/widget/GridLayoutManager#onItemsAdded(android.support.v7.widget.RecyclerView, int, int))`(`[RecyclerView](https://developer.android.com/reference/android/support/v7/widget/RecyclerView)` recyclerView, int positionStart, int itemCount) ` Called when items have been added to the adapter. |
| ` void` | ` `[onItemsChanged](https://developer.android.com/reference/android/support/v7/widget/GridLayoutManager#onItemsChanged(android.support.v7.widget.RecyclerView))`(`[RecyclerView](https://developer.android.com/reference/android/support/v7/widget/RecyclerView)` recyclerView) ` Called in response to a call to[notifyDataSetChanged()](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.Adapter#notifyDataSetChanged())or[swapAdapter(Adapter, boolean)](https://developer.android.com/reference/android/support/v7/widget/RecyclerView#swapAdapter(android.support.v7.widget.RecyclerView.Adapter, boolean))()} and signals that the the entire data set has changed. |
| ` void` | ` `[onItemsMoved](https://developer.android.com/reference/android/support/v7/widget/GridLayoutManager#onItemsMoved(android.support.v7.widget.RecyclerView, int, int, int))`(`[RecyclerView](https://developer.android.com/reference/android/support/v7/widget/RecyclerView)` recyclerView, int from, int to, int itemCount) ` Called when an item is moved withing the adapter. |
| ` void` | ` `[onItemsRemoved](https://developer.android.com/reference/android/support/v7/widget/GridLayoutManager#onItemsRemoved(android.support.v7.widget.RecyclerView, int, int))`(`[RecyclerView](https://developer.android.com/reference/android/support/v7/widget/RecyclerView)` recyclerView, int positionStart, int itemCount) ` Called when items have been removed from the adapter. |
| ` void` | ` `[onItemsUpdated](https://developer.android.com/reference/android/support/v7/widget/GridLayoutManager#onItemsUpdated(android.support.v7.widget.RecyclerView, int, int, java.lang.Object))`(`[RecyclerView](https://developer.android.com/reference/android/support/v7/widget/RecyclerView)` recyclerView, int positionStart, int itemCount, Object payload) ` Called when items have been changed in the adapter and with optional payload. |
| ` void` | ` `[onLayoutChildren](https://developer.android.com/reference/android/support/v7/widget/GridLayoutManager#onLayoutChildren(android.support.v7.widget.RecyclerView.Recycler, android.support.v7.widget.RecyclerView.State))`(`[RecyclerView.Recycler](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.Recycler)` recycler, `[RecyclerView.State](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.State)` state) ` Lay out all relevant child views from the given adapter. |
| ` void` | ` `[onLayoutCompleted](https://developer.android.com/reference/android/support/v7/widget/GridLayoutManager#onLayoutCompleted(android.support.v7.widget.RecyclerView.State))`(`[RecyclerView.State](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.State)` state) ` Called after a full layout calculation is finished. |
| ` int` | ` `[scrollHorizontallyBy](https://developer.android.com/reference/android/support/v7/widget/GridLayoutManager#scrollHorizontallyBy(int, android.support.v7.widget.RecyclerView.Recycler, android.support.v7.widget.RecyclerView.State))`(int dx, `[RecyclerView.Recycler](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.Recycler)` recycler, `[RecyclerView.State](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.State)` state) ` Scroll horizontally by dx pixels in screen coordinates and return the distance traveled. |
| ` int` | ` `[scrollVerticallyBy](https://developer.android.com/reference/android/support/v7/widget/GridLayoutManager#scrollVerticallyBy(int, android.support.v7.widget.RecyclerView.Recycler, android.support.v7.widget.RecyclerView.State))`(int dy, `[RecyclerView.Recycler](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.Recycler)` recycler, `[RecyclerView.State](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.State)` state) ` Scroll vertically by dy pixels in screen coordinates and return the distance traveled. |
| ` void` | ` `[setMeasuredDimension](https://developer.android.com/reference/android/support/v7/widget/GridLayoutManager#setMeasuredDimension(android.graphics.Rect, int, int))`(`[Rect](https://developer.android.com/reference/android/graphics/Rect.html)` childrenBounds, int wSpec, int hSpec) ` Sets the measured dimensions from the given bounding box of the children and the measurement specs that were passed into[onMeasure(int, int)](https://developer.android.com/reference/android/support/v7/widget/RecyclerView#onMeasure(int, int)). |
| ` void` | ` `[setSpanCount](https://developer.android.com/reference/android/support/v7/widget/GridLayoutManager#setSpanCount(int))`(int spanCount) ` Sets the number of spans to be laid out. |
| ` void` | ` `[setSpanSizeLookup](https://developer.android.com/reference/android/support/v7/widget/GridLayoutManager#setSpanSizeLookup(android.support.v7.widget.GridLayoutManager.SpanSizeLookup))`(`[GridLayoutManager.SpanSizeLookup](https://developer.android.com/reference/android/support/v7/widget/GridLayoutManager.SpanSizeLookup)` spanSizeLookup) ` Sets the source to get the number of spans occupied by each item in the adapter. |
| ` void` | ` `[setStackFromEnd](https://developer.android.com/reference/android/support/v7/widget/GridLayoutManager#setStackFromEnd(boolean))`(boolean stackFromEnd) ` stackFromEnd is not supported by GridLayoutManager. |
| ` boolean` | ` `[supportsPredictiveItemAnimations](https://developer.android.com/reference/android/support/v7/widget/GridLayoutManager#supportsPredictiveItemAnimations())`() ` Returns whether this LayoutManager supports "predictive item animations". |
| ### Inherited methods |
|-----------------------|---|
| [](https://developer.android.com/reference/android/support/v7/widget/GridLayoutManager#)From class` `[android.support.v7.widget.LinearLayoutManager](https://developer.android.com/reference/android/support/v7/widget/LinearLayoutManager)` ` |-----------------------------------------------------------------------------------------------------------------------------|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------| | ` void` | ` `[assertNotInLayoutOrScroll](https://developer.android.com/reference/android/support/v7/widget/LinearLayoutManager#assertNotInLayoutOrScroll(java.lang.String))`(String message) ` Checks if RecyclerView is in the middle of a layout or scroll and throws an[IllegalStateException](https://developer.android.com/reference/java/lang/IllegalStateException)if it**is**. | | ` boolean` | ` `[canScrollHorizontally](https://developer.android.com/reference/android/support/v7/widget/LinearLayoutManager#canScrollHorizontally())`() ` Query if horizontal scrolling is currently supported. | | ` boolean` | ` `[canScrollVertically](https://developer.android.com/reference/android/support/v7/widget/LinearLayoutManager#canScrollVertically())`() ` Query if vertical scrolling is currently supported. | | ` void` | ` `[collectAdjacentPrefetchPositions](https://developer.android.com/reference/android/support/v7/widget/LinearLayoutManager#collectAdjacentPrefetchPositions(int, int, android.support.v7.widget.RecyclerView.State, android.support.v7.widget.RecyclerView.LayoutManager.LayoutPrefetchRegistry))`(int dx, int dy, `[RecyclerView.State](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.State)` state, `[RecyclerView.LayoutManager.LayoutPrefetchRegistry](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutManager.LayoutPrefetchRegistry)` layoutPrefetchRegistry) ` Gather all positions from the LayoutManager to be prefetched, given specified momentum. | | ` void` | ` `[collectInitialPrefetchPositions](https://developer.android.com/reference/android/support/v7/widget/LinearLayoutManager#collectInitialPrefetchPositions(int, android.support.v7.widget.RecyclerView.LayoutManager.LayoutPrefetchRegistry))`(int adapterItemCount, `[RecyclerView.LayoutManager.LayoutPrefetchRegistry](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutManager.LayoutPrefetchRegistry)` layoutPrefetchRegistry) ` Gather all positions from the LayoutManager to be prefetched in preperation for its RecyclerView to come on screen, due to the movement of another, containing RecyclerView. | | ` int` | ` `[computeHorizontalScrollExtent](https://developer.android.com/reference/android/support/v7/widget/LinearLayoutManager#computeHorizontalScrollExtent(android.support.v7.widget.RecyclerView.State))`(`[RecyclerView.State](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.State)` state) `
Override this method if you want to support scroll bars. | | ` int` | ` `[computeHorizontalScrollOffset](https://developer.android.com/reference/android/support/v7/widget/LinearLayoutManager#computeHorizontalScrollOffset(android.support.v7.widget.RecyclerView.State))`(`[RecyclerView.State](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.State)` state) `
Override this method if you want to support scroll bars. | | ` int` | ` `[computeHorizontalScrollRange](https://developer.android.com/reference/android/support/v7/widget/LinearLayoutManager#computeHorizontalScrollRange(android.support.v7.widget.RecyclerView.State))`(`[RecyclerView.State](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.State)` state) `
Override this method if you want to support scroll bars. | | ` `[PointF](https://developer.android.com/reference/android/graphics/PointF.html) | ` `[computeScrollVectorForPosition](https://developer.android.com/reference/android/support/v7/widget/LinearLayoutManager#computeScrollVectorForPosition(int))`(int targetPosition) ` Should calculate the vector that points to the direction where the target position can be found. | | ` int` | ` `[computeVerticalScrollExtent](https://developer.android.com/reference/android/support/v7/widget/LinearLayoutManager#computeVerticalScrollExtent(android.support.v7.widget.RecyclerView.State))`(`[RecyclerView.State](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.State)` state) `
Override this method if you want to support scroll bars. | | ` int` | ` `[computeVerticalScrollOffset](https://developer.android.com/reference/android/support/v7/widget/LinearLayoutManager#computeVerticalScrollOffset(android.support.v7.widget.RecyclerView.State))`(`[RecyclerView.State](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.State)` state) `
Override this method if you want to support scroll bars. | | ` int` | ` `[computeVerticalScrollRange](https://developer.android.com/reference/android/support/v7/widget/LinearLayoutManager#computeVerticalScrollRange(android.support.v7.widget.RecyclerView.State))`(`[RecyclerView.State](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.State)` state) `
Override this method if you want to support scroll bars. | | ` int` | ` `[findFirstCompletelyVisibleItemPosition](https://developer.android.com/reference/android/support/v7/widget/LinearLayoutManager#findFirstCompletelyVisibleItemPosition())`() ` Returns the adapter position of the first fully visible view. | | ` int` | ` `[findFirstVisibleItemPosition](https://developer.android.com/reference/android/support/v7/widget/LinearLayoutManager#findFirstVisibleItemPosition())`() ` Returns the adapter position of the first visible view. | | ` int` | ` `[findLastCompletelyVisibleItemPosition](https://developer.android.com/reference/android/support/v7/widget/LinearLayoutManager#findLastCompletelyVisibleItemPosition())`() ` Returns the adapter position of the last fully visible view. | | ` int` | ` `[findLastVisibleItemPosition](https://developer.android.com/reference/android/support/v7/widget/LinearLayoutManager#findLastVisibleItemPosition())`() ` Returns the adapter position of the last visible view. | | ` `[View](https://developer.android.com/reference/android/view/View.html) | ` `[findViewByPosition](https://developer.android.com/reference/android/support/v7/widget/LinearLayoutManager#findViewByPosition(int))`(int position) ` Finds the view which represents the given adapter position. | | ` `[RecyclerView.LayoutParams](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutParams) | ` `[generateDefaultLayoutParams](https://developer.android.com/reference/android/support/v7/widget/LinearLayoutManager#generateDefaultLayoutParams())`() ` Create a default`LayoutParams`object for a child of the RecyclerView. | | ` int` | ` `[getExtraLayoutSpace](https://developer.android.com/reference/android/support/v7/widget/LinearLayoutManager#getExtraLayoutSpace(android.support.v7.widget.RecyclerView.State))`(`[RecyclerView.State](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.State)` state) `
Returns the amount of extra space that should be laid out by LayoutManager. | | ` int` | ` `[getInitialPrefetchItemCount](https://developer.android.com/reference/android/support/v7/widget/LinearLayoutManager#getInitialPrefetchItemCount())`() ` Gets the number of items to prefetch in[collectInitialPrefetchPositions(int, LayoutPrefetchRegistry)](https://developer.android.com/reference/android/support/v7/widget/LinearLayoutManager#collectInitialPrefetchPositions(int, android.support.v7.widget.RecyclerView.LayoutManager.LayoutPrefetchRegistry)), which defines how many inner items should be prefetched when this LayoutManager's RecyclerView is nested inside another RecyclerView. | | ` int` | ` `[getOrientation](https://developer.android.com/reference/android/support/v7/widget/LinearLayoutManager#getOrientation())`() ` Returns the current orientation of the layout. | | ` boolean` | ` `[getRecycleChildrenOnDetach](https://developer.android.com/reference/android/support/v7/widget/LinearLayoutManager#getRecycleChildrenOnDetach())`() ` Returns whether LayoutManager will recycle its children when it is detached from RecyclerView. | | ` boolean` | ` `[getReverseLayout](https://developer.android.com/reference/android/support/v7/widget/LinearLayoutManager#getReverseLayout())`() ` Returns if views are laid out from the opposite direction of the layout. | | ` boolean` | ` `[getStackFromEnd](https://developer.android.com/reference/android/support/v7/widget/LinearLayoutManager#getStackFromEnd())`() ` | | ` boolean` | ` `[isAutoMeasureEnabled](https://developer.android.com/reference/android/support/v7/widget/LinearLayoutManager#isAutoMeasureEnabled())`() ` Returns whether the measuring pass of layout should use the AutoMeasure mechanism of[RecyclerView](https://developer.android.com/reference/android/support/v7/widget/RecyclerView)or if it should be done by the LayoutManager's implementation of[onMeasure(Recycler, State, int, int)](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutManager#onMeasure(android.support.v7.widget.RecyclerView.Recycler, android.support.v7.widget.RecyclerView.State, int, int)). | | ` boolean` | ` `[isLayoutRTL](https://developer.android.com/reference/android/support/v7/widget/LinearLayoutManager#isLayoutRTL())`() ` | | ` boolean` | ` `[isSmoothScrollbarEnabled](https://developer.android.com/reference/android/support/v7/widget/LinearLayoutManager#isSmoothScrollbarEnabled())`() ` Returns the current state of the smooth scrollbar feature. | | ` void` | ` `[onDetachedFromWindow](https://developer.android.com/reference/android/support/v7/widget/LinearLayoutManager#onDetachedFromWindow(android.support.v7.widget.RecyclerView, android.support.v7.widget.RecyclerView.Recycler))`(`[RecyclerView](https://developer.android.com/reference/android/support/v7/widget/RecyclerView)` view, `[RecyclerView.Recycler](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.Recycler)` recycler) ` Called when this LayoutManager is detached from its parent RecyclerView or when its parent RecyclerView is detached from its window. | | ` `[View](https://developer.android.com/reference/android/view/View.html) | ` `[onFocusSearchFailed](https://developer.android.com/reference/android/support/v7/widget/LinearLayoutManager#onFocusSearchFailed(android.view.View, int, android.support.v7.widget.RecyclerView.Recycler, android.support.v7.widget.RecyclerView.State))`(`[View](https://developer.android.com/reference/android/view/View.html)` focused, int focusDirection, `[RecyclerView.Recycler](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.Recycler)` recycler, `[RecyclerView.State](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.State)` state) ` Called when searching for a focusable view in the given direction has failed for the current content of the RecyclerView. | | ` void` | ` `[onInitializeAccessibilityEvent](https://developer.android.com/reference/android/support/v7/widget/LinearLayoutManager#onInitializeAccessibilityEvent(android.view.accessibility.AccessibilityEvent))`(`[AccessibilityEvent](https://developer.android.com/reference/android/view/accessibility/AccessibilityEvent.html)` event) ` | | ` void` | ` `[onLayoutChildren](https://developer.android.com/reference/android/support/v7/widget/LinearLayoutManager#onLayoutChildren(android.support.v7.widget.RecyclerView.Recycler, android.support.v7.widget.RecyclerView.State))`(`[RecyclerView.Recycler](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.Recycler)` recycler, `[RecyclerView.State](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.State)` state) ` Lay out all relevant child views from the given adapter. | | ` void` | ` `[onLayoutCompleted](https://developer.android.com/reference/android/support/v7/widget/LinearLayoutManager#onLayoutCompleted(android.support.v7.widget.RecyclerView.State))`(`[RecyclerView.State](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.State)` state) ` Called after a full layout calculation is finished. | | ` void` | ` `[onRestoreInstanceState](https://developer.android.com/reference/android/support/v7/widget/LinearLayoutManager#onRestoreInstanceState(android.os.Parcelable))`(`[Parcelable](https://developer.android.com/reference/android/os/Parcelable.html)` state) ` | | ` `[Parcelable](https://developer.android.com/reference/android/os/Parcelable.html) | ` `[onSaveInstanceState](https://developer.android.com/reference/android/support/v7/widget/LinearLayoutManager#onSaveInstanceState())`() `
Called when the LayoutManager should save its state. | | ` int` | ` `[scrollHorizontallyBy](https://developer.android.com/reference/android/support/v7/widget/LinearLayoutManager#scrollHorizontallyBy(int, android.support.v7.widget.RecyclerView.Recycler, android.support.v7.widget.RecyclerView.State))`(int dx, `[RecyclerView.Recycler](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.Recycler)` recycler, `[RecyclerView.State](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.State)` state) ` Scroll horizontally by dx pixels in screen coordinates and return the distance traveled. | | ` void` | ` `[scrollToPosition](https://developer.android.com/reference/android/support/v7/widget/LinearLayoutManager#scrollToPosition(int))`(int position) `
Scroll the RecyclerView to make the position visible. | | ` void` | ` `[scrollToPositionWithOffset](https://developer.android.com/reference/android/support/v7/widget/LinearLayoutManager#scrollToPositionWithOffset(int, int))`(int position, int offset) ` Scroll to the specified adapter position with the given offset from resolved layout start. | | ` int` | ` `[scrollVerticallyBy](https://developer.android.com/reference/android/support/v7/widget/LinearLayoutManager#scrollVerticallyBy(int, android.support.v7.widget.RecyclerView.Recycler, android.support.v7.widget.RecyclerView.State))`(int dy, `[RecyclerView.Recycler](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.Recycler)` recycler, `[RecyclerView.State](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.State)` state) ` Scroll vertically by dy pixels in screen coordinates and return the distance traveled. | | ` void` | ` `[setInitialPrefetchItemCount](https://developer.android.com/reference/android/support/v7/widget/LinearLayoutManager#setInitialPrefetchItemCount(int))`(int itemCount) ` Sets the number of items to prefetch in[collectInitialPrefetchPositions(int, LayoutPrefetchRegistry)](https://developer.android.com/reference/android/support/v7/widget/LinearLayoutManager#collectInitialPrefetchPositions(int, android.support.v7.widget.RecyclerView.LayoutManager.LayoutPrefetchRegistry)), which defines how many inner items should be prefetched when this LayoutManager's RecyclerView is nested inside another RecyclerView. | | ` void` | ` `[setOrientation](https://developer.android.com/reference/android/support/v7/widget/LinearLayoutManager#setOrientation(int))`(int orientation) ` Sets the orientation of the layout. | | ` void` | ` `[setRecycleChildrenOnDetach](https://developer.android.com/reference/android/support/v7/widget/LinearLayoutManager#setRecycleChildrenOnDetach(boolean))`(boolean recycleChildrenOnDetach) ` Set whether LayoutManager will recycle its children when it is detached from RecyclerView. | | ` void` | ` `[setReverseLayout](https://developer.android.com/reference/android/support/v7/widget/LinearLayoutManager#setReverseLayout(boolean))`(boolean reverseLayout) ` Used to reverse item traversal and layout order. | | ` void` | ` `[setSmoothScrollbarEnabled](https://developer.android.com/reference/android/support/v7/widget/LinearLayoutManager#setSmoothScrollbarEnabled(boolean))`(boolean enabled) ` When smooth scrollbar is enabled, the position and size of the scrollbar thumb is computed based on the number of visible pixels in the visible items. | | ` void` | ` `[setStackFromEnd](https://developer.android.com/reference/android/support/v7/widget/LinearLayoutManager#setStackFromEnd(boolean))`(boolean stackFromEnd) ` Compatibility support for[setStackFromBottom(boolean)](https://developer.android.com/reference/android/widget/AbsListView.html#setStackFromBottom(boolean)) | | ` void` | ` `[smoothScrollToPosition](https://developer.android.com/reference/android/support/v7/widget/LinearLayoutManager#smoothScrollToPosition(android.support.v7.widget.RecyclerView, android.support.v7.widget.RecyclerView.State, int))`(`[RecyclerView](https://developer.android.com/reference/android/support/v7/widget/RecyclerView)` recyclerView, `[RecyclerView.State](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.State)` state, int position) `
Smooth scroll to the specified adapter position. | | ` boolean` | ` `[supportsPredictiveItemAnimations](https://developer.android.com/reference/android/support/v7/widget/LinearLayoutManager#supportsPredictiveItemAnimations())`() ` Returns whether this LayoutManager supports "predictive item animations". | ||
| [](https://developer.android.com/reference/android/support/v7/widget/GridLayoutManager#)From class` `[android.support.v7.widget.RecyclerView.LayoutManager](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutManager)` ` |------------------------------------------------------------------------------------------------------------------------------------------------------------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------| | ` void` | ` `[addDisappearingView](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutManager#addDisappearingView(android.view.View, int))`(`[View](https://developer.android.com/reference/android/view/View.html)` child, int index) ` To be called only during[onLayoutChildren(Recycler, State)](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutManager#onLayoutChildren(android.support.v7.widget.RecyclerView.Recycler, android.support.v7.widget.RecyclerView.State))to add a view to the layout that is known to be going away, either because it has been[removed](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.Adapter#notifyItemRemoved(int))or because it is actually not in the visible portion of the container but is being laid out in order to inform RecyclerView in how to animate the item out of view. | | ` void` | ` `[addDisappearingView](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutManager#addDisappearingView(android.view.View))`(`[View](https://developer.android.com/reference/android/view/View.html)` child) ` To be called only during[onLayoutChildren(Recycler, State)](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutManager#onLayoutChildren(android.support.v7.widget.RecyclerView.Recycler, android.support.v7.widget.RecyclerView.State))to add a view to the layout that is known to be going away, either because it has been[removed](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.Adapter#notifyItemRemoved(int))or because it is actually not in the visible portion of the container but is being laid out in order to inform RecyclerView in how to animate the item out of view. | | ` void` | ` `[addView](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutManager#addView(android.view.View, int))`(`[View](https://developer.android.com/reference/android/view/View.html)` child, int index) ` Add a view to the currently attached RecyclerView if needed. | | ` void` | ` `[addView](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutManager#addView(android.view.View))`(`[View](https://developer.android.com/reference/android/view/View.html)` child) ` Add a view to the currently attached RecyclerView if needed. | | ` void` | ` `[assertInLayoutOrScroll](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutManager#assertInLayoutOrScroll(java.lang.String))`(String message) ` Checks if RecyclerView is in the middle of a layout or scroll and throws an[IllegalStateException](https://developer.android.com/reference/java/lang/IllegalStateException)if it**is not**. | | ` void` | ` `[assertNotInLayoutOrScroll](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutManager#assertNotInLayoutOrScroll(java.lang.String))`(String message) ` Checks if RecyclerView is in the middle of a layout or scroll and throws an[IllegalStateException](https://developer.android.com/reference/java/lang/IllegalStateException)if it**is**. | | ` void` | ` `[attachView](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutManager#attachView(android.view.View))`(`[View](https://developer.android.com/reference/android/view/View.html)` child) ` Reattach a previously[detached](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutManager#detachView(android.view.View))view. | | ` void` | ` `[attachView](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutManager#attachView(android.view.View, int))`(`[View](https://developer.android.com/reference/android/view/View.html)` child, int index) ` Reattach a previously[detached](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutManager#detachView(android.view.View))view. | | ` void` | ` `[attachView](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutManager#attachView(android.view.View, int, android.support.v7.widget.RecyclerView.LayoutParams))`(`[View](https://developer.android.com/reference/android/view/View.html)` child, int index, `[RecyclerView.LayoutParams](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutParams)` lp) ` Reattach a previously[detached](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutManager#detachView(android.view.View))view. | | ` void` | ` `[calculateItemDecorationsForChild](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutManager#calculateItemDecorationsForChild(android.view.View, android.graphics.Rect))`(`[View](https://developer.android.com/reference/android/view/View.html)` child, `[Rect](https://developer.android.com/reference/android/graphics/Rect.html)` outRect) ` Calculates the item decor insets applied to the given child and updates the provided Rect instance with the inset values. | | ` boolean` | ` `[canScrollHorizontally](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutManager#canScrollHorizontally())`() ` Query if horizontal scrolling is currently supported. | | ` boolean` | ` `[canScrollVertically](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutManager#canScrollVertically())`() ` Query if vertical scrolling is currently supported. | | ` boolean` | ` `[checkLayoutParams](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutManager#checkLayoutParams(android.support.v7.widget.RecyclerView.LayoutParams))`(`[RecyclerView.LayoutParams](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutParams)` lp) ` Determines the validity of the supplied LayoutParams object. | | ` static int` | ` `[chooseSize](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutManager#chooseSize(int, int, int))`(int spec, int desired, int min) ` Chooses a size from the given specs and parameters that is closest to the desired size and also complies with the spec. | | ` void` | ` `[collectAdjacentPrefetchPositions](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))`(int dx, int dy, `[RecyclerView.State](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.State)` state, `[RecyclerView.LayoutManager.LayoutPrefetchRegistry](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutManager.LayoutPrefetchRegistry)` layoutPrefetchRegistry) ` Gather all positions from the LayoutManager to be prefetched, given specified momentum. | | ` void` | ` `[collectInitialPrefetchPositions](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutManager#collectInitialPrefetchPositions(int, android.support.v7.widget.RecyclerView.LayoutManager.LayoutPrefetchRegistry))`(int adapterItemCount, `[RecyclerView.LayoutManager.LayoutPrefetchRegistry](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutManager.LayoutPrefetchRegistry)` layoutPrefetchRegistry) ` Gather all positions from the LayoutManager to be prefetched in preperation for its RecyclerView to come on screen, due to the movement of another, containing RecyclerView. | | ` int` | ` `[computeHorizontalScrollExtent](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutManager#computeHorizontalScrollExtent(android.support.v7.widget.RecyclerView.State))`(`[RecyclerView.State](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.State)` state) `
Override this method if you want to support scroll bars. | | ` int` | ` `[computeHorizontalScrollOffset](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutManager#computeHorizontalScrollOffset(android.support.v7.widget.RecyclerView.State))`(`[RecyclerView.State](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.State)` state) `
Override this method if you want to support scroll bars. | | ` int` | ` `[computeHorizontalScrollRange](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutManager#computeHorizontalScrollRange(android.support.v7.widget.RecyclerView.State))`(`[RecyclerView.State](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.State)` state) `
Override this method if you want to support scroll bars. | | ` int` | ` `[computeVerticalScrollExtent](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutManager#computeVerticalScrollExtent(android.support.v7.widget.RecyclerView.State))`(`[RecyclerView.State](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.State)` state) `
Override this method if you want to support scroll bars. | | ` int` | ` `[computeVerticalScrollOffset](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutManager#computeVerticalScrollOffset(android.support.v7.widget.RecyclerView.State))`(`[RecyclerView.State](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.State)` state) `
Override this method if you want to support scroll bars. | | ` int` | ` `[computeVerticalScrollRange](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutManager#computeVerticalScrollRange(android.support.v7.widget.RecyclerView.State))`(`[RecyclerView.State](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.State)` state) `
Override this method if you want to support scroll bars. | | ` void` | ` `[detachAndScrapAttachedViews](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutManager#detachAndScrapAttachedViews(android.support.v7.widget.RecyclerView.Recycler))`(`[RecyclerView.Recycler](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.Recycler)` recycler) ` Temporarily detach and scrap all currently attached child views. | | ` void` | ` `[detachAndScrapView](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutManager#detachAndScrapView(android.view.View, android.support.v7.widget.RecyclerView.Recycler))`(`[View](https://developer.android.com/reference/android/view/View.html)` child, `[RecyclerView.Recycler](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.Recycler)` recycler) ` Detach a child view and add it to a[Recycler's](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.Recycler)scrap heap. | | ` void` | ` `[detachAndScrapViewAt](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutManager#detachAndScrapViewAt(int, android.support.v7.widget.RecyclerView.Recycler))`(int index, `[RecyclerView.Recycler](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.Recycler)` recycler) ` Detach a child view and add it to a[Recycler's](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.Recycler)scrap heap. | | ` void` | ` `[detachView](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutManager#detachView(android.view.View))`(`[View](https://developer.android.com/reference/android/view/View.html)` child) ` Temporarily detach a child view. | | ` void` | ` `[detachViewAt](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutManager#detachViewAt(int))`(int index) ` Temporarily detach a child view. | | ` void` | ` `[endAnimation](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutManager#endAnimation(android.view.View))`(`[View](https://developer.android.com/reference/android/view/View.html)` view) ` Ends all animations on the view created by the[RecyclerView.ItemAnimator](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.ItemAnimator). | | ` `[View](https://developer.android.com/reference/android/view/View.html) | ` `[findContainingItemView](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutManager#findContainingItemView(android.view.View))`(`[View](https://developer.android.com/reference/android/view/View.html)` view) ` Traverses the ancestors of the given view and returns the item view that contains it and also a direct child of the LayoutManager. | | ` `[View](https://developer.android.com/reference/android/view/View.html) | ` `[findViewByPosition](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutManager#findViewByPosition(int))`(int position) ` Finds the view which represents the given adapter position. | | ` abstract `[RecyclerView.LayoutParams](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutParams) | ` `[generateDefaultLayoutParams](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutManager#generateDefaultLayoutParams())`() ` Create a default`LayoutParams`object for a child of the RecyclerView. | | ` `[RecyclerView.LayoutParams](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutParams) | ` `[generateLayoutParams](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutManager#generateLayoutParams(android.content.Context, android.util.AttributeSet))`(`[Context](https://developer.android.com/reference/android/content/Context.html)` c, `[AttributeSet](https://developer.android.com/reference/android/util/AttributeSet.html)` attrs) ` Create a LayoutParams object suitable for this LayoutManager from an inflated layout resource. | | ` `[RecyclerView.LayoutParams](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutParams) | ` `[generateLayoutParams](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutManager#generateLayoutParams(android.view.ViewGroup.LayoutParams))`(`[ViewGroup.LayoutParams](https://developer.android.com/reference/android/view/ViewGroup.LayoutParams.html)` lp) ` Create a LayoutParams object suitable for this LayoutManager, copying relevant values from the supplied LayoutParams object if possible. | | ` int` | ` `[getBaseline](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutManager#getBaseline())`() ` Returns offset of the RecyclerView's text baseline from the its top boundary. | | ` int` | ` `[getBottomDecorationHeight](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutManager#getBottomDecorationHeight(android.view.View))`(`[View](https://developer.android.com/reference/android/view/View.html)` child) ` Returns the total height of item decorations applied to child's bottom. | | ` `[View](https://developer.android.com/reference/android/view/View.html) | ` `[getChildAt](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutManager#getChildAt(int))`(int index) ` Return the child view at the given index | | ` int` | ` `[getChildCount](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutManager#getChildCount())`() ` Return the current number of child views attached to the parent RecyclerView. | | ` static int` | ` `[getChildMeasureSpec](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutManager#getChildMeasureSpec(int, int, int, int, boolean))`(int parentSize, int parentMode, int padding, int childDimension, boolean canScroll) ` Calculate a MeasureSpec value for measuring a child view in one dimension. | | ` static int` | ` `[getChildMeasureSpec](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutManager#getChildMeasureSpec(int, int, int, boolean))`(int parentSize, int padding, int childDimension, boolean canScroll) ` *This method was deprecated in API level 24.1.0. use[getChildMeasureSpec(int, int, int, int, boolean)](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutManager#getChildMeasureSpec(int, int, int, int, boolean))* | | ` boolean` | ` `[getClipToPadding](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutManager#getClipToPadding())`() ` Check if the RecyclerView is configured to clip child views to its padding. | | ` int` | ` `[getColumnCountForAccessibility](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutManager#getColumnCountForAccessibility(android.support.v7.widget.RecyclerView.Recycler, android.support.v7.widget.RecyclerView.State))`(`[RecyclerView.Recycler](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.Recycler)` recycler, `[RecyclerView.State](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.State)` state) ` Returns the number of columns for accessibility. | | ` int` | ` `[getDecoratedBottom](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutManager#getDecoratedBottom(android.view.View))`(`[View](https://developer.android.com/reference/android/view/View.html)` child) ` Returns the bottom edge of the given child view within its parent, offset by any applied[ItemDecorations](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.ItemDecoration). | | ` void` | ` `[getDecoratedBoundsWithMargins](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutManager#getDecoratedBoundsWithMargins(android.view.View, android.graphics.Rect))`(`[View](https://developer.android.com/reference/android/view/View.html)` view, `[Rect](https://developer.android.com/reference/android/graphics/Rect.html)` outBounds) ` Returns the bounds of the view including its decoration and margins. | | ` int` | ` `[getDecoratedLeft](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutManager#getDecoratedLeft(android.view.View))`(`[View](https://developer.android.com/reference/android/view/View.html)` child) ` Returns the left edge of the given child view within its parent, offset by any applied[ItemDecorations](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.ItemDecoration). | | ` int` | ` `[getDecoratedMeasuredHeight](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutManager#getDecoratedMeasuredHeight(android.view.View))`(`[View](https://developer.android.com/reference/android/view/View.html)` child) ` Returns the measured height of the given child, plus the additional size of any insets applied by[ItemDecorations](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.ItemDecoration). | | ` int` | ` `[getDecoratedMeasuredWidth](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutManager#getDecoratedMeasuredWidth(android.view.View))`(`[View](https://developer.android.com/reference/android/view/View.html)` child) ` Returns the measured width of the given child, plus the additional size of any insets applied by[ItemDecorations](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.ItemDecoration). | | ` int` | ` `[getDecoratedRight](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutManager#getDecoratedRight(android.view.View))`(`[View](https://developer.android.com/reference/android/view/View.html)` child) ` Returns the right edge of the given child view within its parent, offset by any applied[ItemDecorations](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.ItemDecoration). | | ` int` | ` `[getDecoratedTop](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutManager#getDecoratedTop(android.view.View))`(`[View](https://developer.android.com/reference/android/view/View.html)` child) ` Returns the top edge of the given child view within its parent, offset by any applied[ItemDecorations](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.ItemDecoration). | | ` `[View](https://developer.android.com/reference/android/view/View.html) | ` `[getFocusedChild](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutManager#getFocusedChild())`() ` Returns the item View which has or contains focus. | | ` int` | ` `[getHeight](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutManager#getHeight())`() ` Returns the height that is currently relevant to the LayoutManager. | | ` int` | ` `[getHeightMode](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutManager#getHeightMode())`() ` Return the height measurement spec mode that is currently relevant to the LayoutManager. | | ` int` | ` `[getItemCount](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutManager#getItemCount())`() ` Returns the number of items in the adapter bound to the parent RecyclerView. | | ` int` | ` `[getItemViewType](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutManager#getItemViewType(android.view.View))`(`[View](https://developer.android.com/reference/android/view/View.html)` view) ` Returns the View type defined by the adapter. | | ` int` | ` `[getLayoutDirection](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutManager#getLayoutDirection())`() ` Returns the resolved layout direction for this RecyclerView. | | ` int` | ` `[getLeftDecorationWidth](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutManager#getLeftDecorationWidth(android.view.View))`(`[View](https://developer.android.com/reference/android/view/View.html)` child) ` Returns the total width of item decorations applied to child's left. | | ` int` | ` `[getMinimumHeight](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutManager#getMinimumHeight())`() ` | | ` int` | ` `[getMinimumWidth](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutManager#getMinimumWidth())`() ` | | ` int` | ` `[getPaddingBottom](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutManager#getPaddingBottom())`() ` Return the bottom padding of the parent RecyclerView | | ` int` | ` `[getPaddingEnd](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutManager#getPaddingEnd())`() ` Return the end padding of the parent RecyclerView | | ` int` | ` `[getPaddingLeft](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutManager#getPaddingLeft())`() ` Return the left padding of the parent RecyclerView | | ` int` | ` `[getPaddingRight](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutManager#getPaddingRight())`() ` Return the right padding of the parent RecyclerView | | ` int` | ` `[getPaddingStart](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutManager#getPaddingStart())`() ` Return the start padding of the parent RecyclerView | | ` int` | ` `[getPaddingTop](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutManager#getPaddingTop())`() ` Return the top padding of the parent RecyclerView | | ` int` | ` `[getPosition](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutManager#getPosition(android.view.View))`(`[View](https://developer.android.com/reference/android/view/View.html)` view) ` Returns the adapter position of the item represented by the given View. | | ` static `[RecyclerView.LayoutManager.Properties](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutManager.Properties) | ` `[getProperties](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutManager#getProperties(android.content.Context, android.util.AttributeSet, int, int))`(`[Context](https://developer.android.com/reference/android/content/Context.html)` context, `[AttributeSet](https://developer.android.com/reference/android/util/AttributeSet.html)` attrs, int defStyleAttr, int defStyleRes) ` Parse the xml attributes to get the most common properties used by layout managers. | | ` int` | ` `[getRightDecorationWidth](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutManager#getRightDecorationWidth(android.view.View))`(`[View](https://developer.android.com/reference/android/view/View.html)` child) ` Returns the total width of item decorations applied to child's right. | | ` int` | ` `[getRowCountForAccessibility](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutManager#getRowCountForAccessibility(android.support.v7.widget.RecyclerView.Recycler, android.support.v7.widget.RecyclerView.State))`(`[RecyclerView.Recycler](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.Recycler)` recycler, `[RecyclerView.State](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.State)` state) ` Returns the number of rows for accessibility. | | ` int` | ` `[getSelectionModeForAccessibility](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutManager#getSelectionModeForAccessibility(android.support.v7.widget.RecyclerView.Recycler, android.support.v7.widget.RecyclerView.State))`(`[RecyclerView.Recycler](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.Recycler)` recycler, `[RecyclerView.State](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.State)` state) ` Returns the selection mode for accessibility. | | ` int` | ` `[getTopDecorationHeight](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutManager#getTopDecorationHeight(android.view.View))`(`[View](https://developer.android.com/reference/android/view/View.html)` child) ` Returns the total height of item decorations applied to child's top. | | ` void` | ` `[getTransformedBoundingBox](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutManager#getTransformedBoundingBox(android.view.View, boolean, android.graphics.Rect))`(`[View](https://developer.android.com/reference/android/view/View.html)` child, boolean includeDecorInsets, `[Rect](https://developer.android.com/reference/android/graphics/Rect.html)` out) ` Calculates the bounding box of the View while taking into account its matrix changes (translation, scale etc) with respect to the RecyclerView. | | ` int` | ` `[getWidth](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutManager#getWidth())`() ` Returns the width that is currently relevant to the LayoutManager. | | ` int` | ` `[getWidthMode](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutManager#getWidthMode())`() ` Return the width measurement spec mode that is currently relevant to the LayoutManager. | | ` boolean` | ` `[hasFocus](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutManager#hasFocus())`() ` Returns true if the RecyclerView this LayoutManager is bound to has or contains focus. | | ` void` | ` `[ignoreView](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutManager#ignoreView(android.view.View))`(`[View](https://developer.android.com/reference/android/view/View.html)` view) ` Flags a view so that it will not be scrapped or recycled. | | ` boolean` | ` `[isAttachedToWindow](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutManager#isAttachedToWindow())`() ` Returns whether LayoutManager is currently attached to a RecyclerView which is attached to a window. | | ` boolean` | ` `[isAutoMeasureEnabled](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutManager#isAutoMeasureEnabled())`() ` Returns whether the measuring pass of layout should use the AutoMeasure mechanism of[RecyclerView](https://developer.android.com/reference/android/support/v7/widget/RecyclerView)or if it should be done by the LayoutManager's implementation of[onMeasure(Recycler, State, int, int)](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutManager#onMeasure(android.support.v7.widget.RecyclerView.Recycler, android.support.v7.widget.RecyclerView.State, int, int)). | | ` boolean` | ` `[isFocused](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutManager#isFocused())`() ` Returns true if the RecyclerView this LayoutManager is bound to has focus. | | ` final boolean` | ` `[isItemPrefetchEnabled](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutManager#isItemPrefetchEnabled())`() ` Sets whether the LayoutManager should be queried for views outside of its viewport while the UI thread is idle between frames. | | ` boolean` | ` `[isLayoutHierarchical](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutManager#isLayoutHierarchical(android.support.v7.widget.RecyclerView.Recycler, android.support.v7.widget.RecyclerView.State))`(`[RecyclerView.Recycler](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.Recycler)` recycler, `[RecyclerView.State](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.State)` state) ` Returns whether layout is hierarchical or not to be used for accessibility. | | ` boolean` | ` `[isMeasurementCacheEnabled](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutManager#isMeasurementCacheEnabled())`() ` In addition to the View Framework's measurement cache, RecyclerView uses its own additional measurement cache for its children to avoid re-measuring them when not necessary. | | ` boolean` | ` `[isSmoothScrolling](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutManager#isSmoothScrolling())`() ` | | ` boolean` | ` `[isViewPartiallyVisible](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutManager#isViewPartiallyVisible(android.view.View, boolean, boolean))`(`[View](https://developer.android.com/reference/android/view/View.html)` child, boolean completelyVisible, boolean acceptEndPointInclusion) ` Returns whether the given child view is partially or fully visible within the padded bounded area of RecyclerView, depending on the input parameters. | | ` void` | ` `[layoutDecorated](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutManager#layoutDecorated(android.view.View, int, int, int, int))`(`[View](https://developer.android.com/reference/android/view/View.html)` child, int left, int top, int right, int bottom) ` Lay out the given child view within the RecyclerView using coordinates that include any current[ItemDecorations](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.ItemDecoration). | | ` void` | ` `[layoutDecoratedWithMargins](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutManager#layoutDecoratedWithMargins(android.view.View, int, int, int, int))`(`[View](https://developer.android.com/reference/android/view/View.html)` child, int left, int top, int right, int bottom) ` Lay out the given child view within the RecyclerView using coordinates that include any current[ItemDecorations](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.ItemDecoration)and margins. | | ` void` | ` `[measureChild](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutManager#measureChild(android.view.View, int, int))`(`[View](https://developer.android.com/reference/android/view/View.html)` child, int widthUsed, int heightUsed) ` Measure a child view using standard measurement policy, taking the padding of the parent RecyclerView and any added item decorations into account. | | ` void` | ` `[measureChildWithMargins](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutManager#measureChildWithMargins(android.view.View, int, int))`(`[View](https://developer.android.com/reference/android/view/View.html)` child, int widthUsed, int heightUsed) ` Measure a child view using standard measurement policy, taking the padding of the parent RecyclerView, any added item decorations and the child margins into account. | | ` void` | ` `[moveView](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutManager#moveView(int, int))`(int fromIndex, int toIndex) ` Moves a View from one position to another. | | ` void` | ` `[offsetChildrenHorizontal](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutManager#offsetChildrenHorizontal(int))`(int dx) ` Offset all child views attached to the parent RecyclerView by dx pixels along the horizontal axis. | | ` void` | ` `[offsetChildrenVertical](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutManager#offsetChildrenVertical(int))`(int dy) ` Offset all child views attached to the parent RecyclerView by dy pixels along the vertical axis. | | ` void` | ` `[onAdapterChanged](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutManager#onAdapterChanged(android.support.v7.widget.RecyclerView.Adapter, android.support.v7.widget.RecyclerView.Adapter))`(`[Adapter](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.Adapter)` oldAdapter, `[Adapter](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.Adapter)` newAdapter) ` Called if the RecyclerView this LayoutManager is bound to has a different adapter set via[setAdapter(Adapter)](https://developer.android.com/reference/android/support/v7/widget/RecyclerView#setAdapter(android.support.v7.widget.RecyclerView.Adapter))or[swapAdapter(Adapter, boolean)](https://developer.android.com/reference/android/support/v7/widget/RecyclerView#swapAdapter(android.support.v7.widget.RecyclerView.Adapter, boolean)). | | ` boolean` | ` `[onAddFocusables](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutManager#onAddFocusables(android.support.v7.widget.RecyclerView, java.util.ArrayList, int, int))`(`[RecyclerView](https://developer.android.com/reference/android/support/v7/widget/RecyclerView)` recyclerView, ArrayList<`[View](https://developer.android.com/reference/android/view/View.html)`> views, int direction, int focusableMode) ` Called to populate focusable views within the RecyclerView. | | ` void` | ` `[onAttachedToWindow](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutManager#onAttachedToWindow(android.support.v7.widget.RecyclerView))`(`[RecyclerView](https://developer.android.com/reference/android/support/v7/widget/RecyclerView)` view) ` Called when this LayoutManager is both attached to a RecyclerView and that RecyclerView is attached to a window. | | ` void` | ` `[onDetachedFromWindow](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutManager#onDetachedFromWindow(android.support.v7.widget.RecyclerView, android.support.v7.widget.RecyclerView.Recycler))`(`[RecyclerView](https://developer.android.com/reference/android/support/v7/widget/RecyclerView)` view, `[RecyclerView.Recycler](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.Recycler)` recycler) ` Called when this LayoutManager is detached from its parent RecyclerView or when its parent RecyclerView is detached from its window. | | ` void` | ` `[onDetachedFromWindow](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutManager#onDetachedFromWindow(android.support.v7.widget.RecyclerView))`(`[RecyclerView](https://developer.android.com/reference/android/support/v7/widget/RecyclerView)` view) ` *This method was deprecated in API level 22.1.0. override[onDetachedFromWindow(RecyclerView, Recycler)](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutManager#onDetachedFromWindow(android.support.v7.widget.RecyclerView, android.support.v7.widget.RecyclerView.Recycler))* | | ` `[View](https://developer.android.com/reference/android/view/View.html) | ` `[onFocusSearchFailed](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutManager#onFocusSearchFailed(android.view.View, int, android.support.v7.widget.RecyclerView.Recycler, android.support.v7.widget.RecyclerView.State))`(`[View](https://developer.android.com/reference/android/view/View.html)` focused, int direction, `[RecyclerView.Recycler](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.Recycler)` recycler, `[RecyclerView.State](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.State)` state) ` Called when searching for a focusable view in the given direction has failed for the current content of the RecyclerView. | | ` void` | ` `[onInitializeAccessibilityEvent](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutManager#onInitializeAccessibilityEvent(android.view.accessibility.AccessibilityEvent))`(`[AccessibilityEvent](https://developer.android.com/reference/android/view/accessibility/AccessibilityEvent.html)` event) ` | | ` void` | ` `[onInitializeAccessibilityEvent](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutManager#onInitializeAccessibilityEvent(android.support.v7.widget.RecyclerView.Recycler, android.support.v7.widget.RecyclerView.State, android.view.accessibility.AccessibilityEvent))`(`[RecyclerView.Recycler](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.Recycler)` recycler, `[RecyclerView.State](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.State)` state, `[AccessibilityEvent](https://developer.android.com/reference/android/view/accessibility/AccessibilityEvent.html)` event) ` Called by the accessibility delegate to initialize an accessibility event. | | ` void` | ` `[onInitializeAccessibilityNodeInfo](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutManager#onInitializeAccessibilityNodeInfo(android.support.v7.widget.RecyclerView.Recycler, android.support.v7.widget.RecyclerView.State, android.support.v4.view.accessibility.AccessibilityNodeInfoCompat))`(`[RecyclerView.Recycler](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.Recycler)` recycler, `[RecyclerView.State](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.State)` state, `[AccessibilityNodeInfoCompat](https://developer.android.com/reference/android/support/v4/view/accessibility/AccessibilityNodeInfoCompat)` info) ` Called by the AccessibilityDelegate when the information about the current layout should be populated. | | ` void` | ` `[onInitializeAccessibilityNodeInfoForItem](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutManager#onInitializeAccessibilityNodeInfoForItem(android.support.v7.widget.RecyclerView.Recycler, android.support.v7.widget.RecyclerView.State, android.view.View, android.support.v4.view.accessibility.AccessibilityNodeInfoCompat))`(`[RecyclerView.Recycler](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.Recycler)` recycler, `[RecyclerView.State](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.State)` state, `[View](https://developer.android.com/reference/android/view/View.html)` host, `[AccessibilityNodeInfoCompat](https://developer.android.com/reference/android/support/v4/view/accessibility/AccessibilityNodeInfoCompat)` info) ` Called by the AccessibilityDelegate when the accessibility information for a specific item should be populated. | | ` `[View](https://developer.android.com/reference/android/view/View.html) | ` `[onInterceptFocusSearch](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutManager#onInterceptFocusSearch(android.view.View, int))`(`[View](https://developer.android.com/reference/android/view/View.html)` focused, int direction) ` This method gives a LayoutManager an opportunity to intercept the initial focus search before the default behavior of[FocusFinder](https://developer.android.com/reference/android/view/FocusFinder.html)is used. | | ` void` | ` `[onItemsAdded](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutManager#onItemsAdded(android.support.v7.widget.RecyclerView, int, int))`(`[RecyclerView](https://developer.android.com/reference/android/support/v7/widget/RecyclerView)` recyclerView, int positionStart, int itemCount) ` Called when items have been added to the adapter. | | ` void` | ` `[onItemsChanged](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutManager#onItemsChanged(android.support.v7.widget.RecyclerView))`(`[RecyclerView](https://developer.android.com/reference/android/support/v7/widget/RecyclerView)` recyclerView) ` Called in response to a call to[notifyDataSetChanged()](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.Adapter#notifyDataSetChanged())or[swapAdapter(Adapter, boolean)](https://developer.android.com/reference/android/support/v7/widget/RecyclerView#swapAdapter(android.support.v7.widget.RecyclerView.Adapter, boolean))()} and signals that the the entire data set has changed. | | ` void` | ` `[onItemsMoved](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutManager#onItemsMoved(android.support.v7.widget.RecyclerView, int, int, int))`(`[RecyclerView](https://developer.android.com/reference/android/support/v7/widget/RecyclerView)` recyclerView, int from, int to, int itemCount) ` Called when an item is moved withing the adapter. | | ` void` | ` `[onItemsRemoved](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutManager#onItemsRemoved(android.support.v7.widget.RecyclerView, int, int))`(`[RecyclerView](https://developer.android.com/reference/android/support/v7/widget/RecyclerView)` recyclerView, int positionStart, int itemCount) ` Called when items have been removed from the adapter. | | ` void` | ` `[onItemsUpdated](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutManager#onItemsUpdated(android.support.v7.widget.RecyclerView, int, int))`(`[RecyclerView](https://developer.android.com/reference/android/support/v7/widget/RecyclerView)` recyclerView, int positionStart, int itemCount) ` Called when items have been changed in the adapter. | | ` void` | ` `[onItemsUpdated](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutManager#onItemsUpdated(android.support.v7.widget.RecyclerView, int, int, java.lang.Object))`(`[RecyclerView](https://developer.android.com/reference/android/support/v7/widget/RecyclerView)` recyclerView, int positionStart, int itemCount, Object payload) ` Called when items have been changed in the adapter and with optional payload. | | ` void` | ` `[onLayoutChildren](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutManager#onLayoutChildren(android.support.v7.widget.RecyclerView.Recycler, android.support.v7.widget.RecyclerView.State))`(`[RecyclerView.Recycler](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.Recycler)` recycler, `[RecyclerView.State](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.State)` state) ` Lay out all relevant child views from the given adapter. | | ` void` | ` `[onLayoutCompleted](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutManager#onLayoutCompleted(android.support.v7.widget.RecyclerView.State))`(`[RecyclerView.State](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.State)` state) ` Called after a full layout calculation is finished. | | ` void` | ` `[onMeasure](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutManager#onMeasure(android.support.v7.widget.RecyclerView.Recycler, android.support.v7.widget.RecyclerView.State, int, int))`(`[RecyclerView.Recycler](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.Recycler)` recycler, `[RecyclerView.State](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.State)` state, int widthSpec, int heightSpec) ` Measure the attached RecyclerView. | | ` boolean` | ` `[onRequestChildFocus](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutManager#onRequestChildFocus(android.support.v7.widget.RecyclerView, android.view.View, android.view.View))`(`[RecyclerView](https://developer.android.com/reference/android/support/v7/widget/RecyclerView)` parent, `[View](https://developer.android.com/reference/android/view/View.html)` child, `[View](https://developer.android.com/reference/android/view/View.html)` focused) ` *This method was deprecated in API level 22.1.0. Use[onRequestChildFocus(RecyclerView, State, View, View)](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutManager#onRequestChildFocus(android.support.v7.widget.RecyclerView, android.support.v7.widget.RecyclerView.State, android.view.View, android.view.View))* | | ` boolean` | ` `[onRequestChildFocus](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutManager#onRequestChildFocus(android.support.v7.widget.RecyclerView, android.support.v7.widget.RecyclerView.State, android.view.View, android.view.View))`(`[RecyclerView](https://developer.android.com/reference/android/support/v7/widget/RecyclerView)` parent, `[RecyclerView.State](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.State)` state, `[View](https://developer.android.com/reference/android/view/View.html)` child, `[View](https://developer.android.com/reference/android/view/View.html)` focused) ` Called when a descendant view of the RecyclerView requests focus. | | ` void` | ` `[onRestoreInstanceState](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutManager#onRestoreInstanceState(android.os.Parcelable))`(`[Parcelable](https://developer.android.com/reference/android/os/Parcelable.html)` state) ` | | ` `[Parcelable](https://developer.android.com/reference/android/os/Parcelable.html) | ` `[onSaveInstanceState](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutManager#onSaveInstanceState())`() `
Called when the LayoutManager should save its state. | | ` void` | ` `[onScrollStateChanged](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutManager#onScrollStateChanged(int))`(int state) ` RecyclerView calls this method to notify LayoutManager that scroll state has changed. | | ` boolean` | ` `[performAccessibilityAction](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutManager#performAccessibilityAction(android.support.v7.widget.RecyclerView.Recycler, android.support.v7.widget.RecyclerView.State, int, android.os.Bundle))`(`[RecyclerView.Recycler](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.Recycler)` recycler, `[RecyclerView.State](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.State)` state, int action, `[Bundle](https://developer.android.com/reference/android/os/Bundle.html)` args) ` Called by AccessibilityDelegate when an action is requested from the RecyclerView. | | ` boolean` | ` `[performAccessibilityActionForItem](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutManager#performAccessibilityActionForItem(android.support.v7.widget.RecyclerView.Recycler, android.support.v7.widget.RecyclerView.State, android.view.View, int, android.os.Bundle))`(`[RecyclerView.Recycler](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.Recycler)` recycler, `[RecyclerView.State](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.State)` state, `[View](https://developer.android.com/reference/android/view/View.html)` view, int action, `[Bundle](https://developer.android.com/reference/android/os/Bundle.html)` args) ` Called by AccessibilityDelegate when an accessibility action is requested on one of the children of LayoutManager. | | ` void` | ` `[postOnAnimation](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutManager#postOnAnimation(java.lang.Runnable))`(Runnable action) ` Causes the Runnable to execute on the next animation time step. | | ` void` | ` `[removeAllViews](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutManager#removeAllViews())`() ` Remove all views from the currently attached RecyclerView. | | ` void` | ` `[removeAndRecycleAllViews](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutManager#removeAndRecycleAllViews(android.support.v7.widget.RecyclerView.Recycler))`(`[RecyclerView.Recycler](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.Recycler)` recycler) ` Removes all views and recycles them using the given recycler. | | ` void` | ` `[removeAndRecycleView](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutManager#removeAndRecycleView(android.view.View, android.support.v7.widget.RecyclerView.Recycler))`(`[View](https://developer.android.com/reference/android/view/View.html)` child, `[RecyclerView.Recycler](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.Recycler)` recycler) ` Remove a child view and recycle it using the given Recycler. | | ` void` | ` `[removeAndRecycleViewAt](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutManager#removeAndRecycleViewAt(int, android.support.v7.widget.RecyclerView.Recycler))`(int index, `[RecyclerView.Recycler](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.Recycler)` recycler) ` Remove a child view and recycle it using the given Recycler. | | ` boolean` | ` `[removeCallbacks](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutManager#removeCallbacks(java.lang.Runnable))`(Runnable action) ` Removes the specified Runnable from the message queue. | | ` void` | ` `[removeDetachedView](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutManager#removeDetachedView(android.view.View))`(`[View](https://developer.android.com/reference/android/view/View.html)` child) ` Finish removing a view that was previously temporarily[detached](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutManager#detachView(android.view.View)). | | ` void` | ` `[removeView](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutManager#removeView(android.view.View))`(`[View](https://developer.android.com/reference/android/view/View.html)` child) ` Remove a view from the currently attached RecyclerView if needed. | | ` void` | ` `[removeViewAt](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutManager#removeViewAt(int))`(int index) ` Remove a view from the currently attached RecyclerView if needed. | | ` boolean` | ` `[requestChildRectangleOnScreen](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutManager#requestChildRectangleOnScreen(android.support.v7.widget.RecyclerView, android.view.View, android.graphics.Rect, boolean, boolean))`(`[RecyclerView](https://developer.android.com/reference/android/support/v7/widget/RecyclerView)` parent, `[View](https://developer.android.com/reference/android/view/View.html)` child, `[Rect](https://developer.android.com/reference/android/graphics/Rect.html)` rect, boolean immediate, boolean focusedChildVisible) ` Requests that the given child of the RecyclerView be positioned onto the screen. | | ` boolean` | ` `[requestChildRectangleOnScreen](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutManager#requestChildRectangleOnScreen(android.support.v7.widget.RecyclerView, android.view.View, android.graphics.Rect, boolean))`(`[RecyclerView](https://developer.android.com/reference/android/support/v7/widget/RecyclerView)` parent, `[View](https://developer.android.com/reference/android/view/View.html)` child, `[Rect](https://developer.android.com/reference/android/graphics/Rect.html)` rect, boolean immediate) ` Called when a child of the RecyclerView wants a particular rectangle to be positioned onto the screen. | | ` void` | ` `[requestLayout](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutManager#requestLayout())`() ` Calls`RecyclerView#requestLayout`on the underlying RecyclerView | | ` void` | ` `[requestSimpleAnimationsInNextLayout](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutManager#requestSimpleAnimationsInNextLayout())`() ` A LayoutManager can call this method to force RecyclerView to run simple animations in the next layout pass, even if there is not any trigger to do so. | | ` int` | ` `[scrollHorizontallyBy](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutManager#scrollHorizontallyBy(int, android.support.v7.widget.RecyclerView.Recycler, android.support.v7.widget.RecyclerView.State))`(int dx, `[RecyclerView.Recycler](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.Recycler)` recycler, `[RecyclerView.State](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.State)` state) ` Scroll horizontally by dx pixels in screen coordinates and return the distance traveled. | | ` void` | ` `[scrollToPosition](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutManager#scrollToPosition(int))`(int position) ` Scroll to the specified adapter position. | | ` int` | ` `[scrollVerticallyBy](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutManager#scrollVerticallyBy(int, android.support.v7.widget.RecyclerView.Recycler, android.support.v7.widget.RecyclerView.State))`(int dy, `[RecyclerView.Recycler](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.Recycler)` recycler, `[RecyclerView.State](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.State)` state) ` Scroll vertically by dy pixels in screen coordinates and return the distance traveled. | | ` void` | ` `[setAutoMeasureEnabled](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutManager#setAutoMeasureEnabled(boolean))`(boolean enabled) ` *This method was deprecated in API level 27.1.0. Implementors of LayoutManager should define whether or not it uses AutoMeasure by overriding[isAutoMeasureEnabled()](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutManager#isAutoMeasureEnabled()).* | | ` final void` | ` `[setItemPrefetchEnabled](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutManager#setItemPrefetchEnabled(boolean))`(boolean enabled) ` Sets whether the LayoutManager should be queried for views outside of its viewport while the UI thread is idle between frames. | | ` void` | ` `[setMeasuredDimension](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutManager#setMeasuredDimension(int, int))`(int widthSize, int heightSize) ` [Set the measured dimensions](https://developer.android.com/reference/android/view/View.html#setMeasuredDimension(int, int))of the host RecyclerView. | | ` void` | ` `[setMeasuredDimension](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutManager#setMeasuredDimension(android.graphics.Rect, int, int))`(`[Rect](https://developer.android.com/reference/android/graphics/Rect.html)` childrenBounds, int wSpec, int hSpec) ` Sets the measured dimensions from the given bounding box of the children and the measurement specs that were passed into[onMeasure(int, int)](https://developer.android.com/reference/android/support/v7/widget/RecyclerView#onMeasure(int, int)). | | ` void` | ` `[setMeasurementCacheEnabled](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutManager#setMeasurementCacheEnabled(boolean))`(boolean measurementCacheEnabled) ` Sets whether RecyclerView should use its own measurement cache for the children. | | ` void` | ` `[smoothScrollToPosition](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutManager#smoothScrollToPosition(android.support.v7.widget.RecyclerView, android.support.v7.widget.RecyclerView.State, int))`(`[RecyclerView](https://developer.android.com/reference/android/support/v7/widget/RecyclerView)` recyclerView, `[RecyclerView.State](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.State)` state, int position) `
Smooth scroll to the specified adapter position. | | ` void` | ` `[startSmoothScroll](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutManager#startSmoothScroll(android.support.v7.widget.RecyclerView.SmoothScroller))`(`[RecyclerView.SmoothScroller](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.SmoothScroller)` smoothScroller) `
Starts a smooth scroll using the provided SmoothScroller. | | ` void` | ` `[stopIgnoringView](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutManager#stopIgnoringView(android.view.View))`(`[View](https://developer.android.com/reference/android/view/View.html)` view) ` View can be scrapped and recycled again. | | ` boolean` | ` `[supportsPredictiveItemAnimations](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutManager#supportsPredictiveItemAnimations())`() ` Returns whether this LayoutManager supports "predictive item animations". | ||
| [](https://developer.android.com/reference/android/support/v7/widget/GridLayoutManager#)From class` java.lang.Object ` |-------------------|-------------------------------| | ` Object` | ` clone() ` | | ` boolean` | ` equals(Object arg0) ` | | ` void` | ` finalize() ` | | ` final Class` | ` getClass() ` | | ` int` | ` hashCode() ` | | ` final void` | ` notify() ` | | ` final void` | ` notifyAll() ` | | ` String` | ` toString() ` | | ` final void` | ` wait(long arg0, int arg1) ` | | ` final void` | ` wait(long arg0) ` | | ` final void` | ` wait() ` | ||
| [](https://developer.android.com/reference/android/support/v7/widget/GridLayoutManager#)From interface` `[android.support.v7.widget.helper.ItemTouchHelper.ViewDropHandler](https://developer.android.com/reference/android/support/v7/widget/helper/ItemTouchHelper.ViewDropHandler)` ` |------------------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------| | ` abstract void` | ` `[prepareForDrop](https://developer.android.com/reference/android/support/v7/widget/helper/ItemTouchHelper.ViewDropHandler#prepareForDrop(android.view.View, android.view.View, int, int))`(`[View](https://developer.android.com/reference/android/view/View.html)` view, `[View](https://developer.android.com/reference/android/view/View.html)` target, int x, int y) ` Called by the[ItemTouchHelper](https://developer.android.com/reference/android/support/v7/widget/helper/ItemTouchHelper)after a View is dropped over another View. | ||
| [](https://developer.android.com/reference/android/support/v7/widget/GridLayoutManager#)From interface` `[android.support.v7.widget.RecyclerView.SmoothScroller.ScrollVectorProvider](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.SmoothScroller.ScrollVectorProvider)` ` |--------------------------------------------------------------------------------------------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------| | ` abstract `[PointF](https://developer.android.com/reference/android/graphics/PointF.html) | ` `[computeScrollVectorForPosition](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.SmoothScroller.ScrollVectorProvider#computeScrollVectorForPosition(int))`(int targetPosition) ` Should calculate the vector that points to the direction where the target position can be found. | ||
## XML attributes
### RecyclerView_spanCount
**Related methods:**
- [GridLayoutManager(Context,AttributeSet,int,int)](https://developer.android.com/reference/android/support/v7/widget/GridLayoutManager#GridLayoutManager(android.content.Context, android.util.AttributeSet, int, int))
## Constants
### DEFAULT_SPAN_COUNT
added in[version 22.1.0](https://developer.android.com/topic/libraries/support-library/revisions)
```
int DEFAULT_SPAN_COUNT
```
Constant Value: -1 (0xffffffff)
## Public constructors
### GridLayoutManager
added in[version 24.1.0](https://developer.android.com/topic/libraries/support-library/revisions)
```
GridLayoutManager (Context context,
AttributeSet attrs,
int defStyleAttr,
int defStyleRes)
```
Constructor used when layout manager is set in XML by RecyclerView attribute "layoutManager". If spanCount is not specified in the XML, it defaults to a single column.
**Related XML Attributes:**
- [RecyclerView_spanCount](https://developer.android.com/reference/android/support/v7/widget/GridLayoutManager#attr_RecyclerView_spanCount)
| Parameters ||
|----------------|-----------------------|
| `context` | `Context`
|
| `attrs` | `AttributeSet`
|
| `defStyleAttr` | `int`
|
| `defStyleRes` | `int`
|
### GridLayoutManager
added in[version 22.1.0](https://developer.android.com/topic/libraries/support-library/revisions)
```
GridLayoutManager (Context context,
int spanCount)
```
Creates a vertical GridLayoutManager
| Parameters ||
|-------------|----------------------------------------------------------------------|
| `context` | `Context`: Current context, will be used to access resources.
|
| `spanCount` | `int`: The number of columns in the grid
|
### GridLayoutManager
added in[version 22.1.0](https://developer.android.com/topic/libraries/support-library/revisions)
```
GridLayoutManager (Context context,
int spanCount,
int orientation,
boolean reverseLayout)
```
| Parameters ||
|-----------------|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| `context` | `Context`: Current context, will be used to access resources.
|
| `spanCount` | `int`: The number of columns or rows in the grid
|
| `orientation` | `int`: Layout orientation. Should be[HORIZONTAL](https://developer.android.com/reference/android/support/v7/widget/LinearLayoutManager#HORIZONTAL)or[VERTICAL](https://developer.android.com/reference/android/support/v7/widget/LinearLayoutManager#VERTICAL).
|
| `reverseLayout` | `boolean`: When set to true, layouts from end to start.
|
## Public methods
### checkLayoutParams
added in[version 22.1.0](https://developer.android.com/topic/libraries/support-library/revisions)
```
boolean checkLayoutParams (RecyclerView.LayoutParams lp)
```
Determines the validity of the supplied LayoutParams object.
This should check to make sure that the object is of the correct type and all values are within acceptable ranges. The default implementation returns`true`for non-null params.
| Parameters ||
|------|------------------------------------------------------------------|
| `lp` | `RecyclerView.LayoutParams`: LayoutParams object to check
|
| Returns ||
|-----------|-------------------------------------------------------------------|
| `boolean` | true if this LayoutParams object is valid, false otherwise
|
### generateDefaultLayoutParams
added in[version 22.1.0](https://developer.android.com/topic/libraries/support-library/revisions)
```
RecyclerView.LayoutParams generateDefaultLayoutParams ()
```
Create a default`LayoutParams`object for a child of the RecyclerView.
LayoutManagers will often want to use a custom`LayoutParams`type to store extra information specific to the layout. Client code should subclass[RecyclerView.LayoutParams](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutParams)for this purpose.
*Important:* if you use your own custom`LayoutParams`type you must also override[checkLayoutParams(LayoutParams)](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutManager#checkLayoutParams(android.support.v7.widget.RecyclerView.LayoutParams)),[generateLayoutParams(android.view.ViewGroup.LayoutParams)](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutManager#generateLayoutParams(android.view.ViewGroup.LayoutParams))and[generateLayoutParams(android.content.Context, android.util.AttributeSet)](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutManager#generateLayoutParams(android.content.Context, android.util.AttributeSet)).
| Returns ||
|--------------------------------------------------------------------------------------------------------------------------|--------------------------------------------|
| [RecyclerView.LayoutParams](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutParams) | A new LayoutParams for a child view
|
### generateLayoutParams
added in[version 22.1.0](https://developer.android.com/topic/libraries/support-library/revisions)
```
RecyclerView.LayoutParams generateLayoutParams (Context c,
AttributeSet attrs)
```
Create a LayoutParams object suitable for this LayoutManager from an inflated layout resource.
*Important:* if you use your own custom`LayoutParams`type you must also override[checkLayoutParams(LayoutParams)](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutManager#checkLayoutParams(android.support.v7.widget.RecyclerView.LayoutParams)),[generateLayoutParams(android.view.ViewGroup.LayoutParams)](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutManager#generateLayoutParams(android.view.ViewGroup.LayoutParams))and[generateLayoutParams(android.content.Context, android.util.AttributeSet)](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutManager#generateLayoutParams(android.content.Context, android.util.AttributeSet)).
| Parameters ||
|---------|-----------------------------------------------------------------------|
| `c` | `Context`: Context for obtaining styled attributes
|
| `attrs` | `AttributeSet`: AttributeSet describing the supplied arguments
|
| Returns ||
|--------------------------------------------------------------------------------------------------------------------------|----------------------------------|
| [RecyclerView.LayoutParams](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutParams) | a new LayoutParams object
|
### generateLayoutParams
added in[version 22.1.0](https://developer.android.com/topic/libraries/support-library/revisions)
```
RecyclerView.LayoutParams generateLayoutParams (ViewGroup.LayoutParams lp)
```
Create a LayoutParams object suitable for this LayoutManager, copying relevant values from the supplied LayoutParams object if possible.
*Important:* if you use your own custom`LayoutParams`type you must also override[checkLayoutParams(LayoutParams)](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutManager#checkLayoutParams(android.support.v7.widget.RecyclerView.LayoutParams)),[generateLayoutParams(android.view.ViewGroup.LayoutParams)](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutManager#generateLayoutParams(android.view.ViewGroup.LayoutParams))and[generateLayoutParams(android.content.Context, android.util.AttributeSet)](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutManager#generateLayoutParams(android.content.Context, android.util.AttributeSet)).
| Parameters ||
|------|---------------------------------------------------------------------------------|
| `lp` | `ViewGroup.LayoutParams`: Source LayoutParams object to copy values from
|
| Returns ||
|--------------------------------------------------------------------------------------------------------------------------|----------------------------------|
| [RecyclerView.LayoutParams](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutParams) | a new LayoutParams object
|
### getColumnCountForAccessibility
added in[version 22.1.0](https://developer.android.com/topic/libraries/support-library/revisions)
```
int getColumnCountForAccessibility (RecyclerView.Recycler recycler,
RecyclerView.State state)
```
Returns the number of columns for accessibility.
Default implementation returns the number of items in the adapter if LayoutManager supports horizontal scrolling or 1 if LayoutManager does not support horizontal scrolling.
| Parameters ||
|------------|----------------------------------------------------------------------------------------------------------------|
| `recycler` | `RecyclerView.Recycler`: The Recycler that can be used to convert view positions into adapter positions
|
| `state` | `RecyclerView.State`: The current state of RecyclerView
|
| Returns ||
|-------|---------------------------------------------------------------|
| `int` | The number of rows in LayoutManager for accessibility.
|
### getRowCountForAccessibility
added in[version 22.1.0](https://developer.android.com/topic/libraries/support-library/revisions)
```
int getRowCountForAccessibility (RecyclerView.Recycler recycler,
RecyclerView.State state)
```
Returns the number of rows for accessibility.
Default implementation returns the number of items in the adapter if LayoutManager supports vertical scrolling or 1 if LayoutManager does not support vertical scrolling.
| Parameters ||
|------------|----------------------------------------------------------------------------------------------------------------|
| `recycler` | `RecyclerView.Recycler`: The Recycler that can be used to convert view positions into adapter positions
|
| `state` | `RecyclerView.State`: The current state of RecyclerView
|
| Returns ||
|-------|---------------------------------------------------------------|
| `int` | The number of rows in LayoutManager for accessibility.
|
### getSpanCount
added in[version 22.1.0](https://developer.android.com/topic/libraries/support-library/revisions)
```
int getSpanCount ()
```
Returns the number of spans laid out by this grid.
| Returns ||
|-------|----------------------------|
| `int` | The number of spans
|
**See also:**
- [setSpanCount(int)](https://developer.android.com/reference/android/support/v7/widget/GridLayoutManager#setSpanCount(int))
### getSpanSizeLookup
added in[version 22.1.0](https://developer.android.com/topic/libraries/support-library/revisions)
```
GridLayoutManager.SpanSizeLookup getSpanSizeLookup ()
```
Returns the current[GridLayoutManager.SpanSizeLookup](https://developer.android.com/reference/android/support/v7/widget/GridLayoutManager.SpanSizeLookup)used by the GridLayoutManager.
| Returns ||
|----------------------------------------------------------------------------------------------------------------------------------------|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| [GridLayoutManager.SpanSizeLookup](https://developer.android.com/reference/android/support/v7/widget/GridLayoutManager.SpanSizeLookup) | The current[GridLayoutManager.SpanSizeLookup](https://developer.android.com/reference/android/support/v7/widget/GridLayoutManager.SpanSizeLookup)used by the GridLayoutManager.
|
### onFocusSearchFailed
added in[version 22.1.0](https://developer.android.com/topic/libraries/support-library/revisions)
```
View onFocusSearchFailed (View focused,
int focusDirection,
RecyclerView.Recycler recycler,
RecyclerView.State state)
```
Called when searching for a focusable view in the given direction has failed for the current content of the RecyclerView.
This is the LayoutManager's opportunity to populate views in the given direction to fulfill the request if it can. The LayoutManager should attach and return the view to be focused, if a focusable view in the given direction is found. Otherwise, if all the existing (or the newly populated views) are unfocusable, it returns the next unfocusable view to become visible on the screen. This unfocusable view is typically the first view that's either partially or fully out of RV's padded bounded area in the given direction. The default implementation returns null.
| Parameters ||
|------------------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| `focused` | `View`: The currently focused view
|
| `focusDirection` | `int`: One of[FOCUS_UP](https://developer.android.com/reference/android/view/View.html#FOCUS_UP),[FOCUS_DOWN](https://developer.android.com/reference/android/view/View.html#FOCUS_DOWN),[FOCUS_LEFT](https://developer.android.com/reference/android/view/View.html#FOCUS_LEFT),[FOCUS_RIGHT](https://developer.android.com/reference/android/view/View.html#FOCUS_RIGHT),[FOCUS_BACKWARD](https://developer.android.com/reference/android/view/View.html#FOCUS_BACKWARD),[FOCUS_FORWARD](https://developer.android.com/reference/android/view/View.html#FOCUS_FORWARD)or 0 for not applicable
|
| `recycler` | `RecyclerView.Recycler`: The recycler to use for obtaining views for currently offscreen items
|
| `state` | `RecyclerView.State`: Transient state of RecyclerView
|
| Returns ||
|------------------------------------------------------------------------|------------------------------------------------------------------------------------------------------------------------------------------------|
| [View](https://developer.android.com/reference/android/view/View.html) | The chosen view to be focused if a focusable view is found, otherwise an unfocusable view to become visible onto the screen, else null.
|
### onInitializeAccessibilityNodeInfoForItem
added in[version 22.1.0](https://developer.android.com/topic/libraries/support-library/revisions)
```
void onInitializeAccessibilityNodeInfoForItem (RecyclerView.Recycler recycler,
RecyclerView.State state,
View host,
AccessibilityNodeInfoCompat info)
```
Called by the AccessibilityDelegate when the accessibility information for a specific item should be populated.
Default implementation adds basic positioning information about the item.
| Parameters ||
|------------|----------------------------------------------------------------------------------------------------------------|
| `recycler` | `RecyclerView.Recycler`: The Recycler that can be used to convert view positions into adapter positions
|
| `state` | `RecyclerView.State`: The current state of RecyclerView
|
| `host` | `View`: The child for which accessibility node info should be populated
|
| `info` | `AccessibilityNodeInfoCompat`: The info to fill out about the item
|
### onItemsAdded
added in[version 22.1.0](https://developer.android.com/topic/libraries/support-library/revisions)
```
void onItemsAdded (RecyclerView recyclerView,
int positionStart,
int itemCount)
```
Called when items have been added to the adapter. The LayoutManager may choose to requestLayout if the inserted items would require refreshing the currently visible set of child views. (e.g. currently empty space would be filled by appended items, etc.)
### onItemsChanged
added in[version 22.1.0](https://developer.android.com/topic/libraries/support-library/revisions)
```
void onItemsChanged (RecyclerView recyclerView)
```
Called in response to a call to[notifyDataSetChanged()](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.Adapter#notifyDataSetChanged())or[swapAdapter(Adapter, boolean)](https://developer.android.com/reference/android/support/v7/widget/RecyclerView#swapAdapter(android.support.v7.widget.RecyclerView.Adapter, boolean))()} and signals that the the entire data set has changed.
### onItemsMoved
added in[version 22.1.0](https://developer.android.com/topic/libraries/support-library/revisions)
```
void onItemsMoved (RecyclerView recyclerView,
int from,
int to,
int itemCount)
```
Called when an item is moved withing the adapter.
Note that, an item may also change position in response to another ADD/REMOVE/MOVE operation. This callback is only called if and only if[notifyItemMoved(int, int)](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.Adapter#notifyItemMoved(int, int))is called.
### onItemsRemoved
added in[version 22.1.0](https://developer.android.com/topic/libraries/support-library/revisions)
```
void onItemsRemoved (RecyclerView recyclerView,
int positionStart,
int itemCount)
```
Called when items have been removed from the adapter.
### onItemsUpdated
added in[version 24.1.0](https://developer.android.com/topic/libraries/support-library/revisions)
```
void onItemsUpdated (RecyclerView recyclerView,
int positionStart,
int itemCount,
Object payload)
```
Called when items have been changed in the adapter and with optional payload. Default implementation calls[onItemsUpdated(RecyclerView, int, int)](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutManager#onItemsUpdated(android.support.v7.widget.RecyclerView, int, int)).
### onLayoutChildren
added in[version 22.1.0](https://developer.android.com/topic/libraries/support-library/revisions)
```
void onLayoutChildren (RecyclerView.Recycler recycler,
RecyclerView.State state)
```
Lay out all relevant child views from the given adapter. The LayoutManager is in charge of the behavior of item animations. By default, RecyclerView has a non-null[ItemAnimator](https://developer.android.com/reference/android/support/v7/widget/RecyclerView#getItemAnimator()), and simple item animations are enabled. This means that add/remove operations on the adapter will result in animations to add new or appearing items, removed or disappearing items, and moved items. If a LayoutManager returns false from[supportsPredictiveItemAnimations()](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutManager#supportsPredictiveItemAnimations()), which is the default, and runs a normal layout operation during[onLayoutChildren(Recycler, State)](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutManager#onLayoutChildren(android.support.v7.widget.RecyclerView.Recycler, android.support.v7.widget.RecyclerView.State)), the RecyclerView will have enough information to run those animations in a simple way. For example, the default ItemAnimator,[DefaultItemAnimator](https://developer.android.com/reference/android/support/v7/widget/DefaultItemAnimator), will simply fade views in and out, whether they are actually added/removed or whether they are moved on or off the screen due to other add/remove operations.
A LayoutManager wanting a better item animation experience, where items can be animated onto and off of the screen according to where the items exist when they are not on screen, then the LayoutManager should return true from[supportsPredictiveItemAnimations()](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutManager#supportsPredictiveItemAnimations())and add additional logic to[onLayoutChildren(Recycler, State)](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutManager#onLayoutChildren(android.support.v7.widget.RecyclerView.Recycler, android.support.v7.widget.RecyclerView.State)). Supporting predictive animations means that[onLayoutChildren(Recycler, State)](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutManager#onLayoutChildren(android.support.v7.widget.RecyclerView.Recycler, android.support.v7.widget.RecyclerView.State))will be called twice; once as a "pre" layout step to determine where items would have been prior to a real layout, and again to do the "real" layout. In the pre-layout phase, items will remember their pre-layout positions to allow them to be laid out appropriately. Also,[removed](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutParams#isItemRemoved())items will be returned from the scrap to help determine correct placement of other items. These removed items should not be added to the child list, but should be used to help calculate correct positioning of other views, including views that were not previously onscreen (referred to as APPEARING views), but whose pre-layout offscreen position can be determined given the extra information about the pre-layout removed views.
The second layout pass is the real layout in which only non-removed views will be used. The only additional requirement during this pass is, if[supportsPredictiveItemAnimations()](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutManager#supportsPredictiveItemAnimations())returns true, to note which views exist in the child list prior to layout and which are not there after layout (referred to as DISAPPEARING views), and to position/layout those views appropriately, without regard to the actual bounds of the RecyclerView. This allows the animation system to know the location to which to animate these disappearing views.
The default LayoutManager implementations for RecyclerView handle all of these requirements for animations already. Clients of RecyclerView can either use one of these layout managers directly or look at their implementations of onLayoutChildren() to see how they account for the APPEARING and DISAPPEARING views.
| Parameters ||
|------------|------------------------------------------------------------------------------------------------------|
| `recycler` | `RecyclerView.Recycler`: Recycler to use for fetching potentially cached views for a position
|
| `state` | `RecyclerView.State`: Transient state of RecyclerView
|
### onLayoutCompleted
added in[version 24.1.0](https://developer.android.com/topic/libraries/support-library/revisions)
```
void onLayoutCompleted (RecyclerView.State state)
```
Called after a full layout calculation is finished. The layout calculation may include multiple[onLayoutChildren(Recycler, State)](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutManager#onLayoutChildren(android.support.v7.widget.RecyclerView.Recycler, android.support.v7.widget.RecyclerView.State))calls due to animations or layout measurement but it will include only one[onLayoutCompleted(State)](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutManager#onLayoutCompleted(android.support.v7.widget.RecyclerView.State))call. This method will be called at the end of[layout(int, int, int, int)](https://developer.android.com/reference/android/view/View.html#layout(int, int, int, int))call.
This is a good place for the LayoutManager to do some cleanup like pending scroll position, saved state etc.
| Parameters ||
|---------|--------------------------------------------------------------|
| `state` | `RecyclerView.State`: Transient state of RecyclerView
|
### scrollHorizontallyBy
added in[version 22.1.0](https://developer.android.com/topic/libraries/support-library/revisions)
```
int scrollHorizontallyBy (int dx,
RecyclerView.Recycler recycler,
RecyclerView.State state)
```
Scroll horizontally by dx pixels in screen coordinates and return the distance traveled. The default implementation does nothing and returns 0.
| Parameters ||
|------------|------------------------------------------------------------------------------------------------------|
| `dx` | `int`: distance to scroll by in pixels. X increases as scroll position approaches the right.
|
| `recycler` | `RecyclerView.Recycler`: Recycler to use for fetching potentially cached views for a position
|
| `state` | `RecyclerView.State`: Transient state of RecyclerView
|
| Returns ||
|-------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| `int` | The actual distance scrolled. The return value will be negative if dx was negative and scrolling proceeeded in that direction.`Math.abs(result)`may be less than dx if a boundary was reached.
|
### scrollVerticallyBy
added in[version 22.1.0](https://developer.android.com/topic/libraries/support-library/revisions)
```
int scrollVerticallyBy (int dy,
RecyclerView.Recycler recycler,
RecyclerView.State state)
```
Scroll vertically by dy pixels in screen coordinates and return the distance traveled. The default implementation does nothing and returns 0.
| Parameters ||
|------------|------------------------------------------------------------------------------------------------------|
| `dy` | `int`: distance to scroll in pixels. Y increases as scroll position approaches the bottom.
|
| `recycler` | `RecyclerView.Recycler`: Recycler to use for fetching potentially cached views for a position
|
| `state` | `RecyclerView.State`: Transient state of RecyclerView
|
| Returns ||
|-------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| `int` | The actual distance scrolled. The return value will be negative if dy was negative and scrolling proceeeded in that direction.`Math.abs(result)`may be less than dy if a boundary was reached.
|
### setMeasuredDimension
added in[version 24.1.0](https://developer.android.com/topic/libraries/support-library/revisions)
```
void setMeasuredDimension (Rect childrenBounds,
int wSpec,
int hSpec)
```
Sets the measured dimensions from the given bounding box of the children and the measurement specs that were passed into[onMeasure(int, int)](https://developer.android.com/reference/android/support/v7/widget/RecyclerView#onMeasure(int, int)). It is only called if a LayoutManager returns`true`from[isAutoMeasureEnabled()](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutManager#isAutoMeasureEnabled())and it is called after the RecyclerView calls[onLayoutChildren(Recycler, State)](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutManager#onLayoutChildren(android.support.v7.widget.RecyclerView.Recycler, android.support.v7.widget.RecyclerView.State))in the execution of[onMeasure(int, int)](https://developer.android.com/reference/android/support/v7/widget/RecyclerView#onMeasure(int, int)).
This method must call[setMeasuredDimension(int, int)](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutManager#setMeasuredDimension(int, int)).
The default implementation adds the RecyclerView's padding to the given bounding box then caps the value to be within the given measurement specs.
| Parameters ||
|------------------|----------------------------------------------------------------------------|
| `childrenBounds` | `Rect`: The bounding box of all children
|
| `wSpec` | `int`: The widthMeasureSpec that was passed into the RecyclerView.
|
| `hSpec` | `int`: The heightMeasureSpec that was passed into the RecyclerView.
|
### setSpanCount
added in[version 22.1.0](https://developer.android.com/topic/libraries/support-library/revisions)
```
void setSpanCount (int spanCount)
```
Sets the number of spans to be laid out.
If[getOrientation()](https://developer.android.com/reference/android/support/v7/widget/LinearLayoutManager#getOrientation())is[VERTICAL](https://developer.android.com/reference/android/support/v7/widget/LinearLayoutManager#VERTICAL), this is the number of columns. If[getOrientation()](https://developer.android.com/reference/android/support/v7/widget/LinearLayoutManager#getOrientation())is[HORIZONTAL](https://developer.android.com/reference/android/support/v7/widget/LinearLayoutManager#HORIZONTAL), this is the number of rows.
| Parameters ||
|-------------|-----------------------------------------------------|
| `spanCount` | `int`: The total number of spans in the grid
|
**See also:**
- [getSpanCount()](https://developer.android.com/reference/android/support/v7/widget/GridLayoutManager#getSpanCount())
### setSpanSizeLookup
added in[version 22.1.0](https://developer.android.com/topic/libraries/support-library/revisions)
```
void setSpanSizeLookup (GridLayoutManager.SpanSizeLookup spanSizeLookup)
```
Sets the source to get the number of spans occupied by each item in the adapter.
| Parameters ||
|------------------|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| `spanSizeLookup` | `GridLayoutManager.SpanSizeLookup`:[GridLayoutManager.SpanSizeLookup](https://developer.android.com/reference/android/support/v7/widget/GridLayoutManager.SpanSizeLookup)instance to be used to query number of spans occupied by each item
|
### setStackFromEnd
added in[version 22.1.0](https://developer.android.com/topic/libraries/support-library/revisions)
```
void setStackFromEnd (boolean stackFromEnd)
```
stackFromEnd is not supported by GridLayoutManager. Consider using[setReverseLayout(boolean)](https://developer.android.com/reference/android/support/v7/widget/LinearLayoutManager#setReverseLayout(boolean)).
| Parameters ||
|----------------|------------------|
| `stackFromEnd` | `boolean`
|
### supportsPredictiveItemAnimations
added in[version 22.1.0](https://developer.android.com/topic/libraries/support-library/revisions)
```
boolean supportsPredictiveItemAnimations ()
```
Returns whether this LayoutManager supports "predictive item animations".
"Predictive item animations" are automatically created animations that show where items came from, and where they are going to, as items are added, removed, or moved within a layout.
A LayoutManager wishing to support predictive item animations must override this method to return true (the default implementation returns false) and must obey certain behavioral contracts outlined in[onLayoutChildren(Recycler, State)](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutManager#onLayoutChildren(android.support.v7.widget.RecyclerView.Recycler, android.support.v7.widget.RecyclerView.State)).
Whether item animations actually occur in a RecyclerView is actually determined by both the return value from this method and the[ItemAnimator](https://developer.android.com/reference/android/support/v7/widget/RecyclerView#setItemAnimator(android.support.v7.widget.RecyclerView.ItemAnimator))set on the RecyclerView itself. If the RecyclerView has a non-null ItemAnimator but this method returns false, then only "simple item animations" will be enabled in the RecyclerView, in which views whose position are changing are simply faded in/out. If the RecyclerView has a non-null ItemAnimator and this method returns true, then predictive item animations will be enabled in the RecyclerView.
| Returns ||
|-----------|-----------------------------------------------------------------------------------------|
| `boolean` | true if this LayoutManager supports predictive item animations, false otherwise.
|
-
## 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)