added in version 1.0.0

androidx.core.view

Interfaces

ActionProvider.VisibilityListener Listens to changes in visibility as reported by ActionProvider.refreshVisibility()
DragStartHelper.OnDragStartListener Interface definition for a callback to be invoked when a drag start gesture is detected. 
LayoutInflaterFactory This interface was deprecated in API level 1.0.0. Use LayoutInflater.Factory2 directly.  
MenuItemCompat.OnActionExpandListener This interface was deprecated in API level 1.0.0. Use MenuItem.OnActionExpandListener directly.  
NestedScrollingChild This interface should be implemented by View subclasses that wish to support dispatching nested scrolling operations to a cooperating parent ViewGroup
NestedScrollingChild2 This interface should be implemented by View subclasses that wish to support dispatching nested scrolling operations to a cooperating parent ViewGroup
NestedScrollingParent This interface should be implemented by ViewGroup subclasses that wish to support scrolling operations delegated by a nested child view. 
NestedScrollingParent2 This interface should be implemented by ViewGroup subclasses that wish to support scrolling operations delegated by a nested child view. 
OnApplyWindowInsetsListener Listener for applying window insets on a view in a custom way. 
ScrollingView An interface that can be implemented by Views to provide scroll related APIs. 
TintableBackgroundView Interface which allows a View to receive background tinting calls from ViewCompat when running on API v20 devices or lower. 
ViewCompat.OnUnhandledKeyEventListenerCompat Interface definition for a callback to be invoked when a hardware key event hasn't been handled by the view hierarchy. 
ViewPropertyAnimatorListener

An animation listener receives notifications from an animation. 

ViewPropertyAnimatorUpdateListener Implementors of this interface can add themselves as update listeners to an ViewPropertyAnimatorCompat instance to receive callbacks on every animation frame, after the current frame's values have been calculated for that ViewPropertyAnimatorCompat

Classes

AccessibilityDelegateCompat Helper for accessing View.AccessibilityDelegate
ActionProvider This class is a mediator for accomplishing a given task, for example sharing a file. 
DisplayCutoutCompat Represents the area of the display that is not functional for displaying content. 
DragAndDropPermissionsCompat Helper for accessing features in DragAndDropPermissions a backwards compatible fashion. 
DragStartHelper DragStartHelper is a utility class for implementing drag and drop support. 
GestureDetectorCompat Detects various gestures and events using the supplied MotionEvents. 
GravityCompat Compatibility shim for accessing newer functionality from Gravity
InputDeviceCompat Helper class for accessing values in InputDevice
LayoutInflaterCompat Helper for accessing features in LayoutInflater
MarginLayoutParamsCompat Helper for accessing API features in MarginLayoutParams in a backwards compatible way. 
MenuCompat Helper for accessing features in Menu
MenuItemCompat Helper for accessing features in MenuItem
MotionEventCompat Helper for accessing features in MotionEvent
NestedScrollingChildHelper Helper class for implementing nested scrolling child views compatible with Android platform versions earlier than Android 5.0 Lollipop (API 21). 
NestedScrollingParentHelper Helper class for implementing nested scrolling parent views compatible with Android platform versions earlier than Android 5.0 Lollipop (API 21). 
PointerIconCompat Helper for accessing features in PointerIcon in a backwards compatible fashion. 
ScaleGestureDetectorCompat Helper for accessing features in ScaleGestureDetector
VelocityTrackerCompat This class was deprecated in API level 1.0.0. Use VelocityTracker directly.  
ViewCompat Helper for accessing features in View
ViewConfigurationCompat Helper for accessing features in ViewConfiguration
ViewGroupCompat Helper for accessing features in ViewGroup
ViewParentCompat Helper for accessing features in ViewParent
ViewPropertyAnimatorCompat  
ViewPropertyAnimatorListenerAdapter This adapter class provides empty implementations of the methods from ViewPropertyAnimatorListener
WindowCompat Helper for accessing features in Window
WindowInsetsCompat Describes a set of insets for window content.