core/androidx.core.view/[main]NestedScrollingChild2

NestedScrollingChild2

interface NestedScrollingChild2 : NestedScrollingChild(source)

This interface should be implemented by View subclasses that wish to support dispatching nested scrolling operations to a cooperating parent ViewGroup.

Classes implementing this interface should create a final instance of a NestedScrollingChildHelper as a field and delegate any View methods to the NestedScrollingChildHelper 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

Functions

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abstract fun dispatchNestedPreScroll(dx: Int, dy: Int, consumed: @Nullable Array<Int>, offsetInWindow: @Nullable Array<Int>, type: Int): Boolean
Dispatch one step of a nested scroll in progress before this view consumes any portion of it.
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abstract fun dispatchNestedScroll(dxConsumed: Int, dyConsumed: Int, dxUnconsumed: Int, dyUnconsumed: Int, offsetInWindow: @Nullable Array<Int>, type: Int): Boolean
Dispatch one step of a nested scroll in progress.
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abstract fun hasNestedScrollingParent(type: Int): Boolean
Returns true if this view has a nested scrolling parent for the given input type.
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abstract fun startNestedScroll(axes: Int, type: Int): Boolean
Begin a nestable scroll operation along the given axes, for the given input type.
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abstract fun stopNestedScroll(type: Int)
Stop a nested scroll in progress for the given input type.