# WearableLinearLayoutManager
added in[version 26.1.0](https://developer.android.com/topic/libraries/support-library/revisions)
belongs to Maven artifact com.android.support:wear:28.0.0-alpha1
Summary:[Nested Classes](https://developer.android.com/reference/android/support/wear/widget/WearableLinearLayoutManager#nestedclasses)\|[Inherited XML Attrs](https://developer.android.com/reference/android/support/wear/widget/WearableLinearLayoutManager#inhattrs)\|[Inherited Constants](https://developer.android.com/reference/android/support/wear/widget/WearableLinearLayoutManager#inhconstants)\|[Ctors](https://developer.android.com/reference/android/support/wear/widget/WearableLinearLayoutManager#pubctors)\|[Methods](https://developer.android.com/reference/android/support/wear/widget/WearableLinearLayoutManager#pubmethods)\|[Inherited Methods](https://developer.android.com/reference/android/support/wear/widget/WearableLinearLayoutManager#inhmethods)\|[\[Expand All\]](https://developer.android.com/reference/android/support/wear/widget/WearableLinearLayoutManager#)
# WearableLinearLayoutManager
| 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package is part of the Android[support library](https://developer.android.com/topic/libraries/support-library)which is no longer maintained. The support library has been superseded by[AndroidX](https://developer.android.com/jetpack/androidx)which is part of[Jetpack](https://developer.android.com/jetpack).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
WearableLinearLayoutManager
`
`
``
``
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.wear.widget.WearableLinearLayoutManager |
*** ** * ** ***
This wear-specific implementation of[LinearLayoutManager](https://developer.android.com/reference/android/support/v7/widget/LinearLayoutManager)provides basic offsetting logic for updating child layout. For round devices it offsets the children horizontally to make them appear to travel around a circle. For square devices it aligns them in a straight list. This functionality is provided by the[CurvingLayoutCallback](https://developer.android.com/reference/android/support/wear/widget/CurvingLayoutCallback)which is set when constructing the this class with its default constructor[WearableLinearLayoutManager(Context)](https://developer.android.com/reference/android/support/wear/widget/WearableLinearLayoutManager#WearableLinearLayoutManager(android.content.Context)).
## Summary
| ### Nested classes ||
|----------|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| ` class` | [WearableLinearLayoutManager.LayoutCallback](https://developer.android.com/reference/android/support/wear/widget/WearableLinearLayoutManager.LayoutCallback) Callback for interacting with layout passes. |
| ### Inherited XML attributes |
|------------------------------|---|
| [](https://developer.android.com/reference/android/support/wear/widget/WearableLinearLayoutManager#)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/wear/widget/WearableLinearLayoutManager#)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) | | ||
| ### Inherited constants |
|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| [](https://developer.android.com/reference/android/support/wear/widget/WearableLinearLayoutManager#)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 ||
|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|---|
| ` `[WearableLinearLayoutManager](https://developer.android.com/reference/android/support/wear/widget/WearableLinearLayoutManager#WearableLinearLayoutManager(android.content.Context, android.support.wear.widget.WearableLinearLayoutManager.LayoutCallback))`(`[Context](https://developer.android.com/reference/android/content/Context.html)` context, `[WearableLinearLayoutManager.LayoutCallback](https://developer.android.com/reference/android/support/wear/widget/WearableLinearLayoutManager.LayoutCallback)` layoutCallback) ` Creates a[WearableLinearLayoutManager](https://developer.android.com/reference/android/support/wear/widget/WearableLinearLayoutManager)for a vertical list. |
| ` `[WearableLinearLayoutManager](https://developer.android.com/reference/android/support/wear/widget/WearableLinearLayoutManager#WearableLinearLayoutManager(android.content.Context))`(`[Context](https://developer.android.com/reference/android/content/Context.html)` context) ` Creates a[WearableLinearLayoutManager](https://developer.android.com/reference/android/support/wear/widget/WearableLinearLayoutManager)for a vertical list. |
| ### Public methods ||
|-----------------------------------------------------------------------------------------------------------------------------------------------------------------|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| ` `[WearableLinearLayoutManager.LayoutCallback](https://developer.android.com/reference/android/support/wear/widget/WearableLinearLayoutManager.LayoutCallback) | ` `[getLayoutCallback](https://developer.android.com/reference/android/support/wear/widget/WearableLinearLayoutManager#getLayoutCallback())`() ` |
| ` void` | ` `[onLayoutChildren](https://developer.android.com/reference/android/support/wear/widget/WearableLinearLayoutManager#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. |
| ` int` | ` `[scrollVerticallyBy](https://developer.android.com/reference/android/support/wear/widget/WearableLinearLayoutManager#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` | ` `[setLayoutCallback](https://developer.android.com/reference/android/support/wear/widget/WearableLinearLayoutManager#setLayoutCallback(android.support.wear.widget.WearableLinearLayoutManager.LayoutCallback))`(`[WearableLinearLayoutManager.LayoutCallback](https://developer.android.com/reference/android/support/wear/widget/WearableLinearLayoutManager.LayoutCallback)` layoutCallback) ` Set a particular instance of the layout callback for this[WearableLinearLayoutManager](https://developer.android.com/reference/android/support/wear/widget/WearableLinearLayoutManager). |
| ### Inherited methods |
|-----------------------|---|
| [](https://developer.android.com/reference/android/support/wear/widget/WearableLinearLayoutManager#)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/wear/widget/WearableLinearLayoutManager#)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/wear/widget/WearableLinearLayoutManager#)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/wear/widget/WearableLinearLayoutManager#)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/wear/widget/WearableLinearLayoutManager#)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. | ||
## Public constructors
### WearableLinearLayoutManager
added in[version 26.1.0](https://developer.android.com/topic/libraries/support-library/revisions)
```
WearableLinearLayoutManager (Context context,
WearableLinearLayoutManager.LayoutCallback layoutCallback)
```
Creates a[WearableLinearLayoutManager](https://developer.android.com/reference/android/support/wear/widget/WearableLinearLayoutManager)for a vertical list.
| Parameters ||
|------------------|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| `context` | `Context`: Current context, will be used to access resources.
|
| `layoutCallback` | `WearableLinearLayoutManager.LayoutCallback`: Callback to be associated with this[WearableLinearLayoutManager](https://developer.android.com/reference/android/support/wear/widget/WearableLinearLayoutManager)
|
### WearableLinearLayoutManager
added in[version 26.1.0](https://developer.android.com/topic/libraries/support-library/revisions)
```
WearableLinearLayoutManager (Context context)
```
Creates a[WearableLinearLayoutManager](https://developer.android.com/reference/android/support/wear/widget/WearableLinearLayoutManager)for a vertical list.
| Parameters ||
|-----------|----------------------------------------------------------------------|
| `context` | `Context`: Current context, will be used to access resources.
|
## Public methods
### getLayoutCallback
added in[version 26.1.0](https://developer.android.com/topic/libraries/support-library/revisions)
```
WearableLinearLayoutManager.LayoutCallback getLayoutCallback ()
```
| Returns ||
|--------------------------------------------------------------------------------------------------------------------------------------------------------------|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| [WearableLinearLayoutManager.LayoutCallback](https://developer.android.com/reference/android/support/wear/widget/WearableLinearLayoutManager.LayoutCallback) | the current[WearableLinearLayoutManager.LayoutCallback](https://developer.android.com/reference/android/support/wear/widget/WearableLinearLayoutManager.LayoutCallback)associated with this[WearableLinearLayoutManager](https://developer.android.com/reference/android/support/wear/widget/WearableLinearLayoutManager).
|
### onLayoutChildren
added in[version 26.1.0](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
|
### scrollVerticallyBy
added in[version 26.1.0](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.
|
### setLayoutCallback
added in[version 26.1.0](https://developer.android.com/topic/libraries/support-library/revisions)
```
void setLayoutCallback (WearableLinearLayoutManager.LayoutCallback layoutCallback)
```
Set a particular instance of the layout callback for this[WearableLinearLayoutManager](https://developer.android.com/reference/android/support/wear/widget/WearableLinearLayoutManager). The callback will be called on the Ui thread.
-
## Interfaces
- [CircularProgressLayout.OnTimerFinishedListener](https://developer.android.com/reference/android/support/wear/widget/CircularProgressLayout.OnTimerFinishedListener)
-
## Classes
- [BoxInsetLayout](https://developer.android.com/reference/android/support/wear/widget/BoxInsetLayout)
- [BoxInsetLayout.LayoutParams](https://developer.android.com/reference/android/support/wear/widget/BoxInsetLayout.LayoutParams)
- [CircularProgressLayout](https://developer.android.com/reference/android/support/wear/widget/CircularProgressLayout)
- [CurvingLayoutCallback](https://developer.android.com/reference/android/support/wear/widget/CurvingLayoutCallback)
- [RoundedDrawable](https://developer.android.com/reference/android/support/wear/widget/RoundedDrawable)
- [SwipeDismissFrameLayout](https://developer.android.com/reference/android/support/wear/widget/SwipeDismissFrameLayout)
- [SwipeDismissFrameLayout.Callback](https://developer.android.com/reference/android/support/wear/widget/SwipeDismissFrameLayout.Callback)
- [WearableLinearLayoutManager](https://developer.android.com/reference/android/support/wear/widget/WearableLinearLayoutManager)
- [WearableLinearLayoutManager.LayoutCallback](https://developer.android.com/reference/android/support/wear/widget/WearableLinearLayoutManager.LayoutCallback)
- [WearableRecyclerView](https://developer.android.com/reference/android/support/wear/widget/WearableRecyclerView)