ViewPager.SimpleOnPageChangeListener

public class ViewPager.SimpleOnPageChangeListener implements 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 methods

void

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.

Public constructors

SimpleOnPageChangeListener

Added in 1.1.0-alpha02
public SimpleOnPageChangeListener()

Public methods

onPageScrollStateChanged

Added in 1.1.0-alpha02
public 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
int state

The new scroll state.

onPageScrolled

Added in 1.1.0-alpha02
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
int position

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

float positionOffset

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

int positionOffsetPixels

Value in pixels indicating the offset from position.

onPageSelected

Added in 1.1.0-alpha02
public void onPageSelected(int position)

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

Parameters
int position

Position index of the new selected page.