NestedScrollingParent2

Kotlin |Java

interface NestedScrollingParent2 : NestedScrollingParent

androidx.core.view.NestedScrollingParent2

Known Direct Subclasses

CoordinatorLayout, NestedScrollingParent3, SwipeRefreshLayout

CoordinatorLayout	CoordinatorLayout is a super-powered `FrameLayout`.
NestedScrollingParent3	This interface should be implemented by `ViewGroup` subclasses that wish to support scrolling operations delegated by a nested child view.
SwipeRefreshLayout	The SwipeRefreshLayout should be used whenever the user can refresh the contents of a view via a vertical swipe gesture.

Known Indirect Subclasses

CoordinatorLayout, NestedScrollView, SwipeRefreshLayout

CoordinatorLayout	CoordinatorLayout is a super-powered `FrameLayout`.
NestedScrollView	NestedScrollView is just like `android.widget.ScrollView`, but it supports acting as both a nested scrolling parent and child on both new and old versions of Android.
SwipeRefreshLayout	The SwipeRefreshLayout should be used whenever the user can refresh the contents of a view via a vertical swipe gesture.

This interface should be implemented by ViewGroup subclasses that wish to support scrolling operations delegated by a nested child view.

Classes implementing this interface should create a final instance of a NestedScrollingParentHelper as a field and delegate any View or ViewGroup methods to the NestedScrollingParentHelper methods of the same signature.

Views invoking nested scrolling functionality should always do so from the relevant ViewCompat, ViewGroupCompat or ViewParentCompat compatibility shim static methods. This ensures interoperability with nested scrolling views on all versions of Android.

Summary

Public methods
abstract Unit	`onNestedPreScroll(@NonNull target: View, dx: Int, dy: Int, @NonNull consumed: IntArray, type: Int)` React to a nested scroll in progress before the target view consumes a portion of the scroll.
abstract Unit	`onNestedScroll(@NonNull target: View, dxConsumed: Int, dyConsumed: Int, dxUnconsumed: Int, dyUnconsumed: Int, type: Int)` React to a nested scroll in progress.
abstract Unit	`onNestedScrollAccepted(@NonNull child: View, @NonNull target: View, axes: Int, type: Int)` React to the successful claiming of a nested scroll operation.
abstract Boolean	`onStartNestedScroll(@NonNull child: View, @NonNull target: View, axes: Int, type: Int)` React to a descendant view initiating a nestable scroll operation, claiming the nested scroll operation if appropriate.
abstract Unit	`onStopNestedScroll(@NonNull target: View, type: Int)` React to a nested scroll operation ending.

Inherited functions

From class NestedScrollingParent

Int

getNestedScrollAxes()

Return the current axes of nested scrolling for this NestedScrollingParent.

A NestedScrollingParent returning something other than ViewCompat#SCROLL_AXIS_NONE is currently acting as a nested scrolling parent for one or more descendant views in the hierarchy.

Boolean

onNestedFling(@NonNull target: View, velocityX: Float, velocityY: Float, consumed: Boolean)

Request a fling from a nested scroll.

This method signifies that a nested scrolling child has detected suitable conditions for a fling. Generally this means that a touch scroll has ended with a velocity in the direction of scrolling that meets or exceeds the minimum fling velocity along a scrollable axis.

If a nested scrolling child view would normally fling but it is at the edge of its own content, it can use this method to delegate the fling to its nested scrolling parent instead. The parent may optionally consume the fling or observe a child fling.

Boolean onNestedPreFling(@NonNull target: