core/androidx.core.view/[main]NestedScrollingParent2

NestedScrollingParent2

interface NestedScrollingParent2 : NestedScrollingParent(source)

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.

Inheritors

NestedScrollingParent3

Functions

onNestedPreScroll

abstract fun onNestedPreScroll(@NonNull target: View, dx: Int, dy: Int, @NonNull consumed: Array<Int>, type: Int)

React to a nested scroll in progress before the target view consumes a portion of the scroll.

onNestedScroll

abstract fun onNestedScroll(@NonNull target: View, dxConsumed: Int, dyConsumed: Int, dxUnconsumed: Int, dyUnconsumed: Int, type: Int)

React to a nested scroll in progress.

onNestedScrollAccepted

abstract fun onNestedScrollAccepted(@NonNull child: View, @NonNull target: View, axes: Int, type: Int)

React to the successful claiming of a nested scroll operation.

onStartNestedScroll

abstract fun onStartNestedScroll(@NonNull child: View, @NonNull target: View, axes: Int, type: Int): Boolean

React to a descendant view initiating a nestable scroll operation, claiming the nested scroll operation if appropriate.

onStopNestedScroll

abstract fun onStopNestedScroll(@NonNull target: View, type: Int)

React to a nested scroll operation ending.