Android APIs
public static interface

ViewPager.OnPageChangeListener

android.support.v4.view.ViewPager.OnPageChangeListener
Known Indirect Subclasses

Class Overview

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

Summary

Public Methods
abstract void onPageScrollStateChanged(int state)
Called when the scroll state changes.
abstract 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.
abstract void onPageSelected(int position)
This method will be invoked when a new page becomes selected.

Public Methods

public abstract void onPageScrollStateChanged (int state)

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.

public abstract 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.

public abstract 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.