belongs to Maven artifact com.android.support:support-compat:28.0.0-alpha1
NestedScrollingChildHelper
public
class
NestedScrollingChildHelper
extends Object
java.lang.Object | |
↳ | android.support.v4.view.NestedScrollingChildHelper |
Helper class for implementing nested scrolling child views compatible with Android platform versions earlier than Android 5.0 Lollipop (API 21).
View
subclasses should instantiate a final instance of this
class as a field at construction. For each View
method that has a matching
method signature in this class, delegate the operation to the helper instance in an overridden
method implementation. This implements the standard framework policy for nested scrolling.
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 Android
5.0 Lollipop and newer.
Summary
Public constructors | |
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NestedScrollingChildHelper(View view)
Construct a new helper for a given view. |
Public methods | |
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boolean
|
dispatchNestedFling(float velocityX, float velocityY, boolean consumed)
Dispatch a nested fling operation to the current nested scrolling parent. |
boolean
|
dispatchNestedPreFling(float velocityX, float velocityY)
Dispatch a nested pre-fling operation to the current nested scrolling parent. |
boolean
|
dispatchNestedPreScroll(int dx, int dy, int[] consumed, int[] offsetInWindow)
Dispatch one step of a nested pre-scrolling operation to the current nested scrolling parent. |
boolean
|
dispatchNestedPreScroll(int dx, int dy, int[] consumed, int[] offsetInWindow, int type)
Dispatch one step of a nested pre-scrolling operation to the current nested scrolling parent. |
boolean
|
dispatchNestedScroll(int dxConsumed, int dyConsumed, int dxUnconsumed, int dyUnconsumed, int[] offsetInWindow, int type)
Dispatch one step of a nested scrolling operation to the current nested scrolling parent. |
boolean
|
dispatchNestedScroll(int dxConsumed, int dyConsumed, int dxUnconsumed, int dyUnconsumed, int[] offsetInWindow)
Dispatch one step of a nested scrolling operation to the current nested scrolling parent. |
boolean
|
hasNestedScrollingParent()
Check if this view has a nested scrolling parent view currently receiving events for a nested scroll in progress with the type of touch. |
boolean
|
hasNestedScrollingParent(int type)
Check if this view has a nested scrolling parent view currently receiving events for a nested scroll in progress with the given type. |
boolean
|
isNestedScrollingEnabled()
Check if nested scrolling is enabled for this view. |
void
|
onDetachedFromWindow()
View subclasses should always call this method on their
|
void
|
onStopNestedScroll(View child)
Called when a nested scrolling child stops its current nested scroll operation. |
void
|
setNestedScrollingEnabled(boolean enabled)
Enable nested scrolling. |
boolean
|
startNestedScroll(int axes)
Start a new nested scroll for this view. |
boolean
|
startNestedScroll(int axes, int type)
Start a new nested scroll for this view. |
void
|
stopNestedScroll()
Stop a nested scroll in progress. |
void
|
stopNestedScroll(int type)
Stop a nested scroll in progress. |
Inherited methods | |
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java.lang.Object
|