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

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

Summary

Public constructors
`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

OnPageChangeCallback

public 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.