public static class TabLayout.TabLayoutOnPageChangeListener extends Object implements ViewPager.OnPageChangeListener
ViewPager.OnPageChangeListener
class which contains the
necessary calls back to the provided TabLayout
so that the tab position is
kept in sync.
This class stores the provided TabLayout weakly, meaning that you can use
addOnPageChangeListener(OnPageChangeListener)
without removing the listener and
not cause a leak.
Constructor and Description |
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TabLayoutOnPageChangeListener(TabLayout tabLayout) |
Modifier and Type | Method and Description |
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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.
|
public TabLayoutOnPageChangeListener(TabLayout tabLayout)
public void onPageScrollStateChanged(int state)
ViewPager.OnPageChangeListener
onPageScrollStateChanged
in interface ViewPager.OnPageChangeListener
state
- The new scroll state.ViewPager.SCROLL_STATE_IDLE
,
ViewPager.SCROLL_STATE_DRAGGING
,
ViewPager.SCROLL_STATE_SETTLING
public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels)
ViewPager.OnPageChangeListener
onPageScrolled
in interface ViewPager.OnPageChangeListener
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.public void onPageSelected(int position)
ViewPager.OnPageChangeListener
onPageSelected
in interface ViewPager.OnPageChangeListener
position
- Position index of the new selected page.