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added in version 22.1.0
belongs to Maven artifact com.android.support:viewpager:28.0.0-alpha1

ViewPager.SimpleOnPageChangeListener

public static class ViewPager.SimpleOnPageChangeListener
extends Object implements ViewPager.OnPageChangeListener

java.lang.Object
   ↳ android.support.v4.view.ViewPager.SimpleOnPageChangeListener


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

Summary

Public constructors

ViewPager.SimpleOnPageChangeListener()

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
From interface android.support.v4.view.ViewPager.OnPageChangeListener

Public constructors

ViewPager.SimpleOnPageChangeListener

added in version 22.1.0
ViewPager.SimpleOnPageChangeListener ()

Public methods

onPageScrollStateChanged

added in version 22.1.0
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.

onPageScrolled

added in version 22.1.0
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

added in version 22.1.0
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.