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Last updated 2025-05-15 UTC.
[null,null,["Last updated 2025-05-15 UTC."],[],[],null,["# androidx.viewpager2.adapter\n===========================\n\n*** ** * ** ***\n\n[Kotlin](/reference/kotlin/androidx/viewpager2/adapter/package-summary \"View this page in Kotlin\") \\|Java\n\nAnnotations\n-----------\n\n|-------------------------------------------------------------------------------------------------------------------------------------------------------------|---|\n| [FragmentStateAdapter.ExperimentalFragmentStateAdapterApi](/reference/androidx/viewpager2/adapter/FragmentStateAdapter.ExperimentalFragmentStateAdapterApi) | |\n\nInterfaces\n----------\n\n|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|\n| [FragmentStateAdapter.FragmentTransactionCallback.OnPostEventListener](/reference/androidx/viewpager2/adapter/FragmentStateAdapter.FragmentTransactionCallback.OnPostEventListener) | Callback returned by [onFragmentPreAdded](/reference/androidx/viewpager2/adapter/FragmentStateAdapter.FragmentTransactionCallback#onFragmentPreAdded(androidx.fragment.app.Fragment)), [onFragmentPreRemoved](/reference/androidx/viewpager2/adapter/FragmentStateAdapter.FragmentTransactionCallback#onFragmentPreRemoved(androidx.fragment.app.Fragment)), [onFragmentMaxLifecyclePreUpdated](/reference/androidx/viewpager2/adapter/FragmentStateAdapter.FragmentTransactionCallback#onFragmentMaxLifecyclePreUpdated(androidx.fragment.app.Fragment,androidx.lifecycle.Lifecycle.State)) called after the operation ends. |\n| [StatefulAdapter](/reference/androidx/viewpager2/adapter/StatefulAdapter) | [ViewPager2](/reference/androidx/viewpager2/widget/ViewPager2) adapters should implement this interface to be called during [onSaveInstanceState](https://developer.android.com/reference/android/view/View.html#onSaveInstanceState()) and [onRestoreInstanceState](https://developer.android.com/reference/android/view/View.html#onRestoreInstanceState(android.os.Parcelable)) |\n\nClasses\n-------\n\n|---------------------------------------------------------------------------------------------------------------------------------------------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------|\n| [FragmentStateAdapter](/reference/androidx/viewpager2/adapter/FragmentStateAdapter) | Similar in behavior to [FragmentStatePagerAdapter](/reference/androidx/fragment/app/FragmentStatePagerAdapter) |\n| [FragmentStateAdapter.FragmentTransactionCallback](/reference/androidx/viewpager2/adapter/FragmentStateAdapter.FragmentTransactionCallback) | Callback interface for listening to fragment lifecycle changes that happen inside the adapter. |\n| [FragmentViewHolder](/reference/androidx/viewpager2/adapter/FragmentViewHolder) | [ViewHolder](/reference/androidx/recyclerview/widget/RecyclerView.ViewHolder) implementation for handling [Fragment](/reference/androidx/fragment/app/Fragment)s. |"]]
