Summary: Ctors | Methods | Inherited Methods

ViewPager2.OnPageChangeCallback

Kotlin |Java

public static abstract class ViewPager2.OnPageChangeCallback
extends Object

java.lang.Object
↳	androidx.viewpager2.widget.ViewPager2.OnPageChangeCallback

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Callback interface for responding to changing state of the selected page.

Summary

Public constructors
ViewPager2.OnPageChangeCallback()

Public methods
void	onPageScrollStateChanged(int state) Called when the scroll state changes.
void	onPageScrolled(int position, float positionOffset, int positionOffsetPixels) This method will be invoked when the current page is scrolled, either as part of a programmatically initiated smooth scroll or a user initiated touch scroll.
void	onPageSelected(int position) This method will be invoked when a new page becomes selected.

Inherited methods
From class java.lang.Object Object clone() boolean equals(Object arg0) void finalize() final Class<?> getClass() int hashCode() final void notify() final void notifyAll() String toString() final void wait(long arg0, int arg1) final void wait(long arg0) final void wait()

Public constructors

ViewPager2.OnPageChangeCallback

public ViewPager2.OnPageChangeCallback ()

Public methods

onPageScrollStateChanged

public void onPageScrollStateChanged (int state)

Called when the scroll state changes. Useful for discovering when the user begins dragging, when a fake drag is started, when the pager is automatically settling to the current page, or when it is fully stopped/idle. state can be one of ViewPager2.SCROLL_STATE_IDLE, ViewPager2.SCROLL_STATE_DRAGGING or ViewPager2.SCROLL_STATE_SETTLING.

Parameters
state	int

onPageScrolled

public void onPageScrolled (int position, 
                float positionOffset, 
                int positionOffsetPixels)

This method will be invoked when the current page is scrolled, either as part of a programmatically initiated smooth scroll or a user initiated touch scroll.

Parameters
position	int: Position index of the first page currently being displayed. Page position+1 will be visible if positionOffset is nonzero.
positionOffset	float: Value from [0, 1) indicating the offset from the page at position.
positionOffsetPixels	int: Value in pixels indicating the offset from position.

onPageSelected

public void onPageSelected (int position)

This method will be invoked when a new page becomes selected. Animation is not necessarily complete.

Parameters
position	int: Position index of the new selected page.

• Interfaces

  • ViewPager2.PageTransformer

• Classes

  • CompositePageTransformer
  • MarginPageTransformer
  • ViewPager2
  • ViewPager2.OnPageChangeCallback