ViewPager2

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November 20, 2019 1.0.0 - - -

AndroidX Dependencies

To use ViewPager2, add the following AndroidX dependency to your project's build.gradle file:

dependencies {
    implementation "androidx.viewpager2:viewpager2:1.0.0"
}

Version 1.0.0

Version 1.0.0

November 20, 2019

androidx.viewpager2:viewpager2:1.0.0 is released with no changes from 1.0.0-rc01. Version 1.0.0 contains these commits.

Major features of 1.0.0

  • Improvements from the previous ViewPager implementation:
    • RTL (right-to-left) layout support
    • Vertical orientation support
    • Reliable Fragment support (including handling changes to the underlying Fragment collection)
    • Dataset change animations (including DiffUtil support)
  • Easy migration from the previous ViewPager implementation (API parity where possible). See the migration guide and the sample app.

See the guide on using ViewPager2 to slide between Fragments.

Version 1.0.0-rc01

October 23, 2019

androidx.viewpager2:viewpager2:1.0.0-rc01 is released with no changes since 1.0.0-beta05. Version 1.0.0-rc01 contains these commits.

Version 1.0.0-beta05

October 9, 2019

androidx.viewpager2:viewpager2:1.0.0-beta05 is released. Version 1.0.0-beta05 contains these commits.

Bug fixes

  • Fix for requestFocus on an off-screen page causing a page change. The behaviour is now consistent with the original ViewPager. (b/140656866)
  • Fix for focus remaining on an off-screen page after a page change. Focus is now cleared when changing the page. (b/140656866)
  • Fix for ordering of Fragment pause / resume transactions when changing the page (we now always pause the old primary item before resuming the new one). (b/139489059)
  • Fix for canScrollHorizontally(int) and canScrollVertically(int) - they now return whether ViewPager2 can scroll in the given direction. (b/141848404)
  • An issue in SwipeRefreshLayout was fixed to work better with ViewPager2.

Version 1.0.0-beta04

September 5, 2019

androidx.viewpager2:viewpager2:1.0.0-beta04 is released. The commits included in this version can be found here.

Bug fixes

  • Fix for FragmentStateAdapter edge-case issue with Fragment back stack. (b/139095195)
  • Fix for EditText with certain attribute configurations causing a scroll/page jump on typing/focus. (b/138044582, b/139432498)
  • Fix for an issue with ItemDecoration instances, and a workaround for overscroll indicator positioning. (b/139012032)
  • A number of issues were fixed in other components to work better with ViewPager2: RecyclerView, NestedScrollView, and Navigation.

Version 1.0.0-beta03

August 7, 2019

androidx.viewpager2:viewpager2:1.0.0-beta03 is released. The commits included in this version can be found here.

Bug fixes

  • Fix for FragmentStateAdapter issue with transient Fragment state. b/134246546
  • Fix for currentItem and scrollState issues when a data-set is changed during a smooth-scroll (edge cases addressed). b/137642608
  • Fix for PageTransformer (including MarginPageTransformer) animations conflicting with data-set change animations. b/134658996
  • Fix for smooth-scroll animations in large datasets (float integer value limit). b/134858960

Version 1.0.0-beta02

July 19, 2019

androidx.viewpager2:viewpager2:1.0.0-beta02 is released. The commits included in this version can be found here.

Bug fixes

  • Removed unintentional jacoco dependency that was introduced in 1.0.0-beta01. (b/137782951)

Version 1.0.0-beta01

July 17, 2019

androidx.viewpager2:viewpager2:1.0.0-beta01 is released. The commits included in this version can be found here.

Bug fixes

  • Fix for ViewPager2.updateCurrentItem crash while scrolling and updating data-set
  • Fix for NullPointerException crash related to ViewPager2.isLayoutRtl
  • TOUCH_SLOP_PAGING now a default touch slop
  • OnPageChangeCallback events fixed for empty adapters (page 0 instead of -1 for parity with ViewPager1)

Known issues

Version 1.0.0-alpha06

July 2, 2019

androidx.viewpager2:viewpager2:1.0.0-alpha06 is released. The commits included in this version can be found here.

This is our last planned alpha before freezing the API and moving to beta - please provide us with API feedback.

New features

  • Foundations for improved Accessibility: ACTION_PAGE_RIGHT, ACTION_PAGE_DOWN, etc.

API changes

  • FragmentStateAdapter: non-primary-item Fragments are capped at STARTED, and their menuVisibility is set to false.
  • PageTransformer, MarginPageTransformer, CompositePageTransformer: documentation for positionfixed.

Bug fixes

  • currentItem after data-set change / adapter change fixed.
  • MarginPageTransformer with offscreenPageLimit issue fixed.
  • Accessibility actions while in FakeDrag behaviour fixed.

Version 1.0.0-alpha05

June 5, 2019

androidx.viewpager2:viewpager2:1.0.0-alpha05 is released. The commits included in this version can be found here.

New features

  • ItemDecorator introduced with a behaviour consistent with RecyclerView.
  • MarginPageTransformer introduced to provide an ability to create space between pages (outside of page inset).
  • CompositePageTransformer introduced to provide an ability to combine multiple PageTransformers.

API changes

  • FragmentStateAdapter#getItem method renamed to FragmentStateAdapter#createFragment - previous method name has proven to be a source of bugs in the past.
  • OFFSCREEN_PAGE_LIMIT_DEFAULT value changed from 0 to -1. No need for a client code change if the OFFSCREEN_PAGE_LIMIT_DEFAULTconstant used.

Bug fixes

  • getCurrentItem() behaviour corrected when SCROLL_STATE_SETTLING gets interrupted by a drag in the opposite direction.
  • FragmentStateAdapter class loader issues addressed in the "Don't keep activities" context.
  • setOffscreenPageLimit documentation improved.

Version 1.0.0-alpha04

May 7, 2019

androidx.viewpager2:viewpager2:1.0.0-alpha04 is released. The commits included in this version can be found here.

New features

  • offscreenPageLimit: allows for a tight control of the number of page Views / Fragments kept in the view hierarchy

API changes

  • orientation and isUserScrollable attributes are no longer part of SavedState
  • saveState and restoreState methods made final in FragmentStateAdapter
  • ViewPager2.Orientation and ViewPager2.ScrollState annotations made non-public

Bug fixes

  • SavedState: fixed an issue with restoring when Activity gets destroyed / recreated
  • SavedState: delayed restoring until the adapter is set
  • OnPageChangeCallback: minor edge cases fixed

Version 1.0.0-alpha03

April 3rd, 2019

androidx.viewpager2:viewpager2:1.0.0-alpha03 is released. The commits included in this version can be found here.

New features

  • Ability to programmatically scroll ViewPager2: fakeDragBy(offsetPx).

API changes

  • FragmentStateAdapter now requires a Lifecycle object. Two utility constructors added to obtain it from the host FragmentActivity or the host Fragment.

Bug fixes

  • Numerous Fragment support fixes:
    • handling dataset updates while minimised, or during a screen rotation;
    • removing irrelevant Fragments after rotation;
    • removing saved state of removed items.
  • PageChangeCallback: fixed page offset calculation for pages with margins.

Version 1.0.0-alpha02

March 13, 2019

androidx.viewpager2:viewpager2:1.0.0-alpha02 is released. The full list of commits included in this version can be found here.

New features

  • Ability to disable user input (setUserInputEnabled, isUserInputEnabled)

API changes

  • ViewPager2 class final

Bug fixes

  • FragmentStateAdapter stability fixes

Version 1.0.0-alpha01

February 7, 2019

androidx.viewpager2:viewpager2 1.0.0-alpha01 is released. This is the first release of ViewPager2.

New features

  • Comparing to its predecessor android.support.v4.view.ViewPager (VP1):
    • Right-to-left (RTL) layout support
    • Vertical orientation support
    • notifyDataSetChanged fully functional (VP1 bugs addressed)

API changes

  • FragmentStateAdapter replaces FragmentStatePagerAdapter
  • RecyclerView.Adapter replaces PagerAdapter
  • registerOnPageChangeCallback replaces addPageChangeListener

Known issues

  • clipToPadding
  • no fakeDrag
  • JavaDoc
  • nested scrolling parallel to orientation
  • no offscreen limit control
  • needs better TabLayout integration
  • no pageWidth setter (forced 100%/100%)
  • page transformer: no hardware/software layer choice; no reverse drawing order
  • keep current item visible when inserting a page before current
  • keyboard navigation needs work
  • FragmentStateAdapter stability / performance improvements coming