# LinearSnapHelper
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/LinearSnapHelper#pubctors)\|[Methods](https://developer.android.com/reference/android/support/v7/widget/LinearSnapHelper#pubmethods)\|[Inherited Methods](https://developer.android.com/reference/android/support/v7/widget/LinearSnapHelper#inhmethods)\|[\[Expand All\]](https://developer.android.com/reference/android/support/v7/widget/LinearSnapHelper#)
# LinearSnapHelper
| 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package is part of the Android[support library](https://developer.android.com/topic/libraries/support-library)which is no longer maintained. The support library has been superseded by[AndroidX](https://developer.android.com/jetpack/androidx)which is part of[Jetpack](https://developer.android.com/jetpack).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
LinearSnapHelper
`
`
``
``
extends `[SnapHelper](https://developer.android.com/reference/android/support/v7/widget/SnapHelper)`
``
`
|---|---|---|--------------------------------------------|
| 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/reference/android/support/v7/widget/SnapHelper) ||
| | | ↳ | 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.
The implementation will snap the center of the target child view to the center of the attached[RecyclerView](https://developer.android.com/reference/android/support/v7/widget/RecyclerView). If you intend to change this behavior then override[calculateDistanceToFinalSnap(RecyclerView.LayoutManager, View)](https://developer.android.com/reference/android/support/v7/widget/SnapHelper#calculateDistanceToFinalSnap(android.support.v7.widget.RecyclerView.LayoutManager, android.view.View)).
## Summary
| ### Public constructors ||
|-----------------------------------------------------------------------------------------------------------------------------------|---|
| ` `[LinearSnapHelper](https://developer.android.com/reference/android/support/v7/widget/LinearSnapHelper#LinearSnapHelper())`() ` |
| ### Public methods ||
|---------------------------------------------------------------------------|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| ` int[]` | ` `[calculateDistanceToFinalSnap](https://developer.android.com/reference/android/support/v7/widget/LinearSnapHelper#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. |
| ` `[View](https://developer.android.com/reference/android/view/View.html) | ` `[findSnapView](https://developer.android.com/reference/android/support/v7/widget/LinearSnapHelper#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. |
| ` int` | ` `[findTargetSnapPosition](https://developer.android.com/reference/android/support/v7/widget/LinearSnapHelper#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. |
| ### Inherited methods |
|-----------------------|---|
| [](https://developer.android.com/reference/android/support/v7/widget/LinearSnapHelper#)From class` `[android.support.v7.widget.SnapHelper](https://developer.android.com/reference/android/support/v7/widget/SnapHelper)` ` |---------------------------------------------------------------------------------------------------------------------------------|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------| | ` 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. | | ` `[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.* | | ` 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. | ||
| [](https://developer.android.com/reference/android/support/v7/widget/LinearSnapHelper#)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/reference/android/support/v7/widget/LinearSnapHelper#)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
### LinearSnapHelper
added in[version 25.1.0](https://developer.android.com/topic/libraries/support-library/revisions)
```
LinearSnapHelper ()
```
## Public methods
### 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.
|
### 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
|
-
## 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)