android.support.v4.view
Class ViewPager.SimpleOnPageChangeListener

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

All Implemented Interfaces:

ViewPager.OnPageChangeListener

Enclosing class:

ViewPager

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

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.

Constructor Summary

ViewPager.SimpleOnPageChangeListener()

Method Summary

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

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

ViewPager.SimpleOnPageChangeListener

public ViewPager.SimpleOnPageChangeListener()

Method Detail

onPageScrolled

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

Description copied from interface: ViewPager.OnPageChangeListener

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.

Specified by:

onPageScrolled in interface ViewPager.OnPageChangeListener

Parameters:

position - Position index of the first page currently being displayed. Page position+1 will be visible if positionOffset is nonzero.

positionOffset - Value from [0, 1) indicating the offset from the page at position.

positionOffsetPixels - Value in pixels indicating the offset from position.

onPageSelected

public void onPageSelected(int position)

Description copied from interface: ViewPager.OnPageChangeListener

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

Specified by:

onPageSelected in interface ViewPager.OnPageChangeListener

Parameters:

position - Position index of the new selected page.

onPageScrollStateChanged

public void onPageScrollStateChanged(int state)

Description copied from interface: ViewPager.OnPageChangeListener

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.

Specified by:

onPageScrollStateChanged in interface ViewPager.OnPageChangeListener

Parameters:

state - The new scroll state.

See Also:

ViewPager.SCROLL_STATE_IDLE, ViewPager.SCROLL_STATE_DRAGGING, ViewPager.SCROLL_STATE_SETTLING