ViewPager.OnPageChangeListener
public interface ViewPager.OnPageChangeListener
ViewPager.SimpleOnPageChangeListener |
Simple implementation of the |
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(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
onPageScrollStateChanged
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 | |
|---|---|
int state |
The new scroll state. |
onPageScrolled
abstract void onPageScrolled(
int position,
float positionOffset,
@Px 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. |
@Px int positionOffsetPixels |
Value in pixels indicating the offset from position. |
onPageSelected
abstract 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. |