# SnapHelper added in[version 25.1.0](https://developer.android.com/topic/libraries/support-library/revisions) belongs to Maven artifact com.android.support:recyclerview-v7:28.0.0-alpha1 Summary:[Ctors](https://developer.android.com/reference/android/support/v7/widget/SnapHelper#pubctors)\|[Methods](https://developer.android.com/reference/android/support/v7/widget/SnapHelper#pubmethods)\|[Protected Methods](https://developer.android.com/reference/android/support/v7/widget/SnapHelper#promethods)\|[Inherited Methods](https://developer.android.com/reference/android/support/v7/widget/SnapHelper#inhmethods)\|[\[Expand All\]](https://developer.android.com/reference/android/support/v7/widget/SnapHelper#) # SnapHelper | 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package is part of the Android[support library](https://developer.android.com/topic/libraries/support-library)which is no longer maintained. The support library has been superseded by[AndroidX](https://developer.android.com/jetpack/androidx)which is part of[Jetpack](https://developer.android.com/jetpack).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 abstract class SnapHelper ` ` `` extends `[RecyclerView.OnFlingListener](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.OnFlingListener)` `` ` |---|---|--------------------------------------| | java.lang.Object ||| | ↳ | [android.support.v7.widget.RecyclerView.OnFlingListener](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.OnFlingListener) || | | ↳ | android.support.v7.widget.SnapHelper | |--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------| | [![](https://developer.android.com/static/assets/images/styles/disclosure_down.png)](https://developer.android.com/reference/android/support/v7/widget/SnapHelper#)Known Direct Subclasses [LinearSnapHelper](https://developer.android.com/reference/android/support/v7/widget/LinearSnapHelper),[PagerSnapHelper](https://developer.android.com/reference/android/support/v7/widget/PagerSnapHelper) |--------------------------------------------------------------------------------------------------------|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------| | [LinearSnapHelper](https://developer.android.com/reference/android/support/v7/widget/LinearSnapHelper) | Implementation of the[SnapHelper](https://developer.android.com/reference/android/support/v7/widget/SnapHelper)supporting snapping in either vertical or horizontal orientation. | | [PagerSnapHelper](https://developer.android.com/reference/android/support/v7/widget/PagerSnapHelper) | Implementation of the[SnapHelper](https://developer.android.com/reference/android/support/v7/widget/SnapHelper)supporting pager style snapping in either vertical or horizontal orientation. | |
*** ** * ** *** Class intended to support snapping for a[RecyclerView](https://developer.android.com/reference/android/support/v7/widget/RecyclerView). SnapHelper tries to handle fling as well but for this to work properly, the[RecyclerView.LayoutManager](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutManager)must implement the[RecyclerView.SmoothScroller.ScrollVectorProvider](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.SmoothScroller.ScrollVectorProvider)interface or you should override[onFling(int, int)](https://developer.android.com/reference/android/support/v7/widget/SnapHelper#onFling(int, int))and handle fling manually. ## Summary | ### Public constructors || |-----------------------------------------------------------------------------------------------------------------|---| | ` `[SnapHelper](https://developer.android.com/reference/android/support/v7/widget/SnapHelper#SnapHelper())`() ` | | ### Public methods || |------------------------------------------------------------------------------------|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------| | ` void` | ` `[attachToRecyclerView](https://developer.android.com/reference/android/support/v7/widget/SnapHelper#attachToRecyclerView(android.support.v7.widget.RecyclerView))`(`[RecyclerView](https://developer.android.com/reference/android/support/v7/widget/RecyclerView)` recyclerView) ` Attaches the[SnapHelper](https://developer.android.com/reference/android/support/v7/widget/SnapHelper)to the provided RecyclerView, by calling[setOnFlingListener(RecyclerView.OnFlingListener)](https://developer.android.com/reference/android/support/v7/widget/RecyclerView#setOnFlingListener(android.support.v7.widget.RecyclerView.OnFlingListener)). | | ` abstract int[]` | ` `[calculateDistanceToFinalSnap](https://developer.android.com/reference/android/support/v7/widget/SnapHelper#calculateDistanceToFinalSnap(android.support.v7.widget.RecyclerView.LayoutManager, android.view.View))`(`[RecyclerView.LayoutManager](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutManager)` layoutManager, `[View](https://developer.android.com/reference/android/view/View.html)` targetView) ` Override this method to snap to a particular point within the target view or the container view on any axis. | | ` int[]` | ` `[calculateScrollDistance](https://developer.android.com/reference/android/support/v7/widget/SnapHelper#calculateScrollDistance(int, int))`(int velocityX, int velocityY) ` Calculated the estimated scroll distance in each direction given velocities on both axes. | | ` abstract `[View](https://developer.android.com/reference/android/view/View.html) | ` `[findSnapView](https://developer.android.com/reference/android/support/v7/widget/SnapHelper#findSnapView(android.support.v7.widget.RecyclerView.LayoutManager))`(`[RecyclerView.LayoutManager](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutManager)` layoutManager) ` Override this method to provide a particular target view for snapping. | | ` abstract int` | ` `[findTargetSnapPosition](https://developer.android.com/reference/android/support/v7/widget/SnapHelper#findTargetSnapPosition(android.support.v7.widget.RecyclerView.LayoutManager, int, int))`(`[RecyclerView.LayoutManager](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutManager)` layoutManager, int velocityX, int velocityY) ` Override to provide a particular adapter target position for snapping. | | ` boolean` | ` `[onFling](https://developer.android.com/reference/android/support/v7/widget/SnapHelper#onFling(int, int))`(int velocityX, int velocityY) ` Override this to handle a fling given the velocities in both x and y directions. | | ### Protected methods || |---------------------------------------------------------------------------------------------------------------------------------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------| | ` `[RecyclerView.SmoothScroller](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.SmoothScroller) | ` `[createScroller](https://developer.android.com/reference/android/support/v7/widget/SnapHelper#createScroller(android.support.v7.widget.RecyclerView.LayoutManager))`(`[RecyclerView.LayoutManager](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutManager)` layoutManager) ` Creates a scroller to be used in the snapping implementation. | | ` `[LinearSmoothScroller](https://developer.android.com/reference/android/support/v7/widget/LinearSmoothScroller) | ` `[createSnapScroller](https://developer.android.com/reference/android/support/v7/widget/SnapHelper#createSnapScroller(android.support.v7.widget.RecyclerView.LayoutManager))`(`[RecyclerView.LayoutManager](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutManager)` layoutManager) ` *This method was deprecated in API level 26.1.0. use[createScroller(LayoutManager)](https://developer.android.com/reference/android/support/v7/widget/SnapHelper#createScroller(android.support.v7.widget.RecyclerView.LayoutManager))instead.* | | ### Inherited methods | |-----------------------|---| | [![](https://developer.android.com/static/assets/images/styles/disclosure_down.png)](https://developer.android.com/reference/android/support/v7/widget/SnapHelper#)From class` `[android.support.v7.widget.RecyclerView.OnFlingListener](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.OnFlingListener)` ` |---------------------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------| | ` abstract boolean` | ` `[onFling](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.OnFlingListener#onFling(int, int))`(int velocityX, int velocityY) ` Override this to handle a fling given the velocities in both x and y directions. | || | [![](https://developer.android.com/static/assets/images/styles/disclosure_down.png)](https://developer.android.com/reference/android/support/v7/widget/SnapHelper#)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() ` | || ## Public constructors ### SnapHelper added in[version 25.1.0](https://developer.android.com/topic/libraries/support-library/revisions) ``` SnapHelper () ```

## Public methods ### attachToRecyclerView added in[version 25.1.0](https://developer.android.com/topic/libraries/support-library/revisions) ``` void attachToRecyclerView (RecyclerView recyclerView) ``` Attaches the[SnapHelper](https://developer.android.com/reference/android/support/v7/widget/SnapHelper)to the provided RecyclerView, by calling[setOnFlingListener(RecyclerView.OnFlingListener)](https://developer.android.com/reference/android/support/v7/widget/RecyclerView#setOnFlingListener(android.support.v7.widget.RecyclerView.OnFlingListener)). You can call this method with`null`to detach it from the current RecyclerView.
| Parameters || |----------------|---------------------------------------------------------------------------------------------------------------------------------------------------------------| | `recyclerView` | `RecyclerView`: The RecyclerView instance to which you want to add this helper or`null`if you want to remove SnapHelper from the current RecyclerView.
| | Throws || |----------------------------|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------| | `IllegalArgumentException` | if there is already a[RecyclerView.OnFlingListener](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.OnFlingListener)attached to the provided[RecyclerView](https://developer.android.com/reference/android/support/v7/widget/RecyclerView). | | `IllegalStateException` | | ### calculateDistanceToFinalSnap added in[version 25.1.0](https://developer.android.com/topic/libraries/support-library/revisions) ``` int[] calculateDistanceToFinalSnap (RecyclerView.LayoutManager layoutManager, View targetView) ``` Override this method to snap to a particular point within the target view or the container view on any axis. This method is called when the[SnapHelper](https://developer.android.com/reference/android/support/v7/widget/SnapHelper)has intercepted a fling and it needs to know the exact distance required to scroll by in order to snap to the target view.
| Parameters || |-----------------|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------| | `layoutManager` | `RecyclerView.LayoutManager`: the[RecyclerView.LayoutManager](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutManager)associated with the attached[RecyclerView](https://developer.android.com/reference/android/support/v7/widget/RecyclerView)
| | `targetView` | `View`: the target view that is chosen as the view to snap
| | Returns || |---------|---------------------------------------------------------------------------------------------------------------------------------------------------| | `int[]` | the output coordinates the put the result into. out\[0\] is the distance on horizontal axis and out\[1\] is the distance on vertical axis.
| ### calculateScrollDistance added in[version 25.1.0](https://developer.android.com/topic/libraries/support-library/revisions) ``` int[] calculateScrollDistance (int velocityX, int velocityY) ``` Calculated the estimated scroll distance in each direction given velocities on both axes.
| Parameters || |-------------|------------------------------------------------------| | `velocityX` | `int`: Fling velocity on the horizontal axis.
| | `velocityY` | `int`: Fling velocity on the vertical axis.
| | Returns || |---------|-----------------------------------------------------------------------------------| | `int[]` | array holding the calculated distances in x and y directions respectively.
| ### findSnapView added in[version 25.1.0](https://developer.android.com/topic/libraries/support-library/revisions) ``` View findSnapView (RecyclerView.LayoutManager layoutManager) ``` Override this method to provide a particular target view for snapping. This method is called when the[SnapHelper](https://developer.android.com/reference/android/support/v7/widget/SnapHelper)is ready to start snapping and requires a target view to snap to. It will be explicitly called when the scroll state becomes idle after a scroll. It will also be called when the[SnapHelper](https://developer.android.com/reference/android/support/v7/widget/SnapHelper)is preparing to snap after a fling and requires a reference view from the current set of child views. If this method returns`null`, SnapHelper will not snap to any view.
| Parameters || |-----------------|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------| | `layoutManager` | `RecyclerView.LayoutManager`: the[RecyclerView.LayoutManager](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutManager)associated with the attached[RecyclerView](https://developer.android.com/reference/android/support/v7/widget/RecyclerView)
| | Returns || |------------------------------------------------------------------------|-------------------------------------------------------------------| | [View](https://developer.android.com/reference/android/view/View.html) | the target view to which to snap on fling or end of scroll
| ### findTargetSnapPosition added in[version 25.1.0](https://developer.android.com/topic/libraries/support-library/revisions) ``` int findTargetSnapPosition (RecyclerView.LayoutManager layoutManager, int velocityX, int velocityY) ``` Override to provide a particular adapter target position for snapping.
| Parameters || |-----------------|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------| | `layoutManager` | `RecyclerView.LayoutManager`: the[RecyclerView.LayoutManager](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutManager)associated with the attached[RecyclerView](https://developer.android.com/reference/android/support/v7/widget/RecyclerView)
| | `velocityX` | `int`: fling velocity on the horizontal axis
| | `velocityY` | `int`: fling velocity on the vertical axis
| | Returns || |-------|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------| | `int` | the target adapter position to you want to snap or[NO_POSITION](https://developer.android.com/reference/android/support/v7/widget/RecyclerView#NO_POSITION)if no snapping should happen
| ### onFling added in[version 25.1.0](https://developer.android.com/topic/libraries/support-library/revisions) ``` boolean onFling (int velocityX, int velocityY) ``` Override this to handle a fling given the velocities in both x and y directions. Note that this method will only be called if the associated[RecyclerView.LayoutManager](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutManager)supports scrolling and the fling is not handled by nested scrolls first.
| Parameters || |-------------|------------------------------------------------| | `velocityX` | `int`: the fling velocity on the X axis
| | `velocityY` | `int`: the fling velocity on the Y axis
| | Returns || |-----------|--------------------------------------------------------| | `boolean` | true if the fling was handled, false otherwise.
| ## Protected methods ### createScroller added in[version 26.1.0](https://developer.android.com/topic/libraries/support-library/revisions) ``` RecyclerView.SmoothScroller createScroller (RecyclerView.LayoutManager layoutManager) ``` Creates a scroller to be used in the snapping implementation.
| Parameters || |-----------------|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------| | `layoutManager` | `RecyclerView.LayoutManager`: The[RecyclerView.LayoutManager](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutManager)associated with the attached[RecyclerView](https://developer.android.com/reference/android/support/v7/widget/RecyclerView).
| | Returns || |------------------------------------------------------------------------------------------------------------------------------|----------------------------------------------------------------------------------------------------------------------------------------------------------------------| | [RecyclerView.SmoothScroller](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.SmoothScroller) | a[RecyclerView.SmoothScroller](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.SmoothScroller)which will handle the scrolling.
| ### createSnapScroller added in[version 25.1.0](https://developer.android.com/topic/libraries/support-library/revisions) ``` LinearSmoothScroller createSnapScroller (RecyclerView.LayoutManager layoutManager) ```
**This method was deprecated in API level 26.1.0.** use[createScroller(LayoutManager)](https://developer.android.com/reference/android/support/v7/widget/SnapHelper#createScroller(android.support.v7.widget.RecyclerView.LayoutManager))instead. Creates a scroller to be used in the snapping implementation.
| Parameters || |-----------------|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------| | `layoutManager` | `RecyclerView.LayoutManager`: The[RecyclerView.LayoutManager](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutManager)associated with the attached[RecyclerView](https://developer.android.com/reference/android/support/v7/widget/RecyclerView).
| | Returns || |----------------------------------------------------------------------------------------------------------------|--------------------------------------------------------------------------------------------------------------------------------------------------------| | [LinearSmoothScroller](https://developer.android.com/reference/android/support/v7/widget/LinearSmoothScroller) | a[LinearSmoothScroller](https://developer.android.com/reference/android/support/v7/widget/LinearSmoothScroller)which will handle the scrolling.
| - ## Annotations - [RecyclerView.EdgeEffectFactory.EdgeDirection](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.EdgeEffectFactory.EdgeDirection) - [RecyclerView.ItemAnimator.AdapterChanges](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.ItemAnimator.AdapterChanges) - ## Interfaces - [ActionMenuView.OnMenuItemClickListener](https://developer.android.com/reference/android/support/v7/widget/ActionMenuView.OnMenuItemClickListener) - [PopupMenu.OnDismissListener](https://developer.android.com/reference/android/support/v7/widget/PopupMenu.OnDismissListener) - [PopupMenu.OnMenuItemClickListener](https://developer.android.com/reference/android/support/v7/widget/PopupMenu.OnMenuItemClickListener) - [RecyclerView.ChildDrawingOrderCallback](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.ChildDrawingOrderCallback) - [RecyclerView.ItemAnimator.ItemAnimatorFinishedListener](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.ItemAnimator.ItemAnimatorFinishedListener) - [RecyclerView.LayoutManager.LayoutPrefetchRegistry](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutManager.LayoutPrefetchRegistry) - [RecyclerView.OnChildAttachStateChangeListener](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.OnChildAttachStateChangeListener) - [RecyclerView.OnItemTouchListener](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.OnItemTouchListener) - [RecyclerView.RecyclerListener](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.RecyclerListener) - [RecyclerView.SmoothScroller.ScrollVectorProvider](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.SmoothScroller.ScrollVectorProvider) - [SearchView.OnCloseListener](https://developer.android.com/reference/android/support/v7/widget/SearchView.OnCloseListener) - [SearchView.OnQueryTextListener](https://developer.android.com/reference/android/support/v7/widget/SearchView.OnQueryTextListener) - [SearchView.OnSuggestionListener](https://developer.android.com/reference/android/support/v7/widget/SearchView.OnSuggestionListener) - [ShareActionProvider.OnShareTargetSelectedListener](https://developer.android.com/reference/android/support/v7/widget/ShareActionProvider.OnShareTargetSelectedListener) - [ThemedSpinnerAdapter](https://developer.android.com/reference/android/support/v7/widget/ThemedSpinnerAdapter) - [Toolbar.OnMenuItemClickListener](https://developer.android.com/reference/android/support/v7/widget/Toolbar.OnMenuItemClickListener) - ## Classes - [ActionMenuView](https://developer.android.com/reference/android/support/v7/widget/ActionMenuView) - [ActionMenuView.LayoutParams](https://developer.android.com/reference/android/support/v7/widget/ActionMenuView.LayoutParams) - [AppCompatAutoCompleteTextView](https://developer.android.com/reference/android/support/v7/widget/AppCompatAutoCompleteTextView) - [AppCompatButton](https://developer.android.com/reference/android/support/v7/widget/AppCompatButton) - [AppCompatCheckBox](https://developer.android.com/reference/android/support/v7/widget/AppCompatCheckBox) - [AppCompatCheckedTextView](https://developer.android.com/reference/android/support/v7/widget/AppCompatCheckedTextView) - [AppCompatEditText](https://developer.android.com/reference/android/support/v7/widget/AppCompatEditText) - [AppCompatImageButton](https://developer.android.com/reference/android/support/v7/widget/AppCompatImageButton) - [AppCompatImageView](https://developer.android.com/reference/android/support/v7/widget/AppCompatImageView) - [AppCompatMultiAutoCompleteTextView](https://developer.android.com/reference/android/support/v7/widget/AppCompatMultiAutoCompleteTextView) - [AppCompatRadioButton](https://developer.android.com/reference/android/support/v7/widget/AppCompatRadioButton) - [AppCompatRatingBar](https://developer.android.com/reference/android/support/v7/widget/AppCompatRatingBar) - [AppCompatSeekBar](https://developer.android.com/reference/android/support/v7/widget/AppCompatSeekBar) - [AppCompatSpinner](https://developer.android.com/reference/android/support/v7/widget/AppCompatSpinner) - [AppCompatTextView](https://developer.android.com/reference/android/support/v7/widget/AppCompatTextView) - [CardView](https://developer.android.com/reference/android/support/v7/widget/CardView) - [DefaultItemAnimator](https://developer.android.com/reference/android/support/v7/widget/DefaultItemAnimator) - [DividerItemDecoration](https://developer.android.com/reference/android/support/v7/widget/DividerItemDecoration) - [GridLayout](https://developer.android.com/reference/android/support/v7/widget/GridLayout) - [GridLayout.Alignment](https://developer.android.com/reference/android/support/v7/widget/GridLayout.Alignment) - [GridLayout.LayoutParams](https://developer.android.com/reference/android/support/v7/widget/GridLayout.LayoutParams) - [GridLayout.Spec](https://developer.android.com/reference/android/support/v7/widget/GridLayout.Spec) - [GridLayoutManager](https://developer.android.com/reference/android/support/v7/widget/GridLayoutManager) - [GridLayoutManager.DefaultSpanSizeLookup](https://developer.android.com/reference/android/support/v7/widget/GridLayoutManager.DefaultSpanSizeLookup) - [GridLayoutManager.LayoutParams](https://developer.android.com/reference/android/support/v7/widget/GridLayoutManager.LayoutParams) - [GridLayoutManager.SpanSizeLookup](https://developer.android.com/reference/android/support/v7/widget/GridLayoutManager.SpanSizeLookup) - [LinearLayoutCompat](https://developer.android.com/reference/android/support/v7/widget/LinearLayoutCompat) - [LinearLayoutCompat.LayoutParams](https://developer.android.com/reference/android/support/v7/widget/LinearLayoutCompat.LayoutParams) - [LinearLayoutManager](https://developer.android.com/reference/android/support/v7/widget/LinearLayoutManager) - [LinearLayoutManager.LayoutChunkResult](https://developer.android.com/reference/android/support/v7/widget/LinearLayoutManager.LayoutChunkResult) - [LinearSmoothScroller](https://developer.android.com/reference/android/support/v7/widget/LinearSmoothScroller) - [LinearSnapHelper](https://developer.android.com/reference/android/support/v7/widget/LinearSnapHelper) - [ListPopupWindow](https://developer.android.com/reference/android/support/v7/widget/ListPopupWindow) - [OrientationHelper](https://developer.android.com/reference/android/support/v7/widget/OrientationHelper) - [PagerSnapHelper](https://developer.android.com/reference/android/support/v7/widget/PagerSnapHelper) - [PopupMenu](https://developer.android.com/reference/android/support/v7/widget/PopupMenu) - [RecyclerView](https://developer.android.com/reference/android/support/v7/widget/RecyclerView) - [RecyclerView.Adapter](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.Adapter) - [RecyclerView.AdapterDataObserver](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.AdapterDataObserver) - [RecyclerView.EdgeEffectFactory](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.EdgeEffectFactory) - [RecyclerView.ItemAnimator](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.ItemAnimator) - [RecyclerView.ItemAnimator.ItemHolderInfo](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.ItemAnimator.ItemHolderInfo) - [RecyclerView.ItemDecoration](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.ItemDecoration) - [RecyclerView.LayoutManager](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutManager) - [RecyclerView.LayoutManager.Properties](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutManager.Properties) - [RecyclerView.LayoutParams](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.LayoutParams) - [RecyclerView.OnFlingListener](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.OnFlingListener) - [RecyclerView.OnScrollListener](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.OnScrollListener) - [RecyclerView.RecycledViewPool](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.RecycledViewPool) - [RecyclerView.Recycler](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.Recycler) - [RecyclerView.SimpleOnItemTouchListener](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.SimpleOnItemTouchListener) - [RecyclerView.SmoothScroller](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.SmoothScroller) - [RecyclerView.SmoothScroller.Action](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.SmoothScroller.Action) - [RecyclerView.State](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.State) - [RecyclerView.ViewCacheExtension](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.ViewCacheExtension) - [RecyclerView.ViewHolder](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.ViewHolder) - [RecyclerViewAccessibilityDelegate](https://developer.android.com/reference/android/support/v7/widget/RecyclerViewAccessibilityDelegate) - [RecyclerViewAccessibilityDelegate.ItemDelegate](https://developer.android.com/reference/android/support/v7/widget/RecyclerViewAccessibilityDelegate.ItemDelegate) - [SearchView](https://developer.android.com/reference/android/support/v7/widget/SearchView) - [ShareActionProvider](https://developer.android.com/reference/android/support/v7/widget/ShareActionProvider) - [SimpleItemAnimator](https://developer.android.com/reference/android/support/v7/widget/SimpleItemAnimator) - [SnapHelper](https://developer.android.com/reference/android/support/v7/widget/SnapHelper) - [StaggeredGridLayoutManager](https://developer.android.com/reference/android/support/v7/widget/StaggeredGridLayoutManager) - [StaggeredGridLayoutManager.LayoutParams](https://developer.android.com/reference/android/support/v7/widget/StaggeredGridLayoutManager.LayoutParams) - [SwitchCompat](https://developer.android.com/reference/android/support/v7/widget/SwitchCompat) - [ThemedSpinnerAdapter.Helper](https://developer.android.com/reference/android/support/v7/widget/ThemedSpinnerAdapter.Helper) - [Toolbar](https://developer.android.com/reference/android/support/v7/widget/Toolbar) - [Toolbar.LayoutParams](https://developer.android.com/reference/android/support/v7/widget/Toolbar.LayoutParams) - [Toolbar.SavedState](https://developer.android.com/reference/android/support/v7/widget/Toolbar.SavedState) - [TooltipCompat](https://developer.android.com/reference/android/support/v7/widget/TooltipCompat)