ViewPager.SimpleOnPageChangeListener

class ViewPager.SimpleOnPageChangeListener : ViewPager.OnPageChangeListener


Simple implementation of the OnPageChangeListener interface with stub implementations of each method. Extend this if you do not intend to override every method of OnPageChangeListener.

Summary

Public constructors

Public functions

Unit

Called when the scroll state changes.

Unit
onPageScrolled(
    position: Int,
    positionOffset: Float,
    positionOffsetPixels: Int
)

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.

Unit
onPageSelected(position: Int)

This method will be invoked when a new page becomes selected.

Public constructors

SimpleOnPageChangeListener

Added in 1.1.0-alpha02
SimpleOnPageChangeListener()

Public functions

onPageScrollStateChanged

Added in 1.1.0-alpha02
fun onPageScrollStateChanged(state: Int): Unit

Called when the scroll state changes. Useful for discovering when the user begins dragging, when the pager is automatically settling to the current page, or when it is fully stopped/idle.

Parameters
state: Int

The new scroll state.

onPageScrolled

Added in 1.1.0-alpha02
fun onPageScrolled(
    position: Int,
    positionOffset: Float,
    positionOffsetPixels: Int
): Unit

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

Added in 1.1.0-alpha02
fun onPageSelected(position: Int): Unit

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.