FragmentStateAdapter.FragmentTransactionCallback

abstract class FragmentStateAdapter.FragmentTransactionCallback

Callback interface for listening to fragment lifecycle changes that happen inside the adapter.

Summary

Nested types

Callback returned by onFragmentPreAdded, onFragmentPreRemoved, onFragmentMaxLifecyclePreUpdated called after the operation ends.

Public constructors

Public functions
FragmentStateAdapter.FragmentTransactionCallback.OnPostEventListener
onFragmentMaxLifecyclePreUpdated(
    fragment: Fragment,
    maxLifecycleState: Lifecycle.State
)

Called right before Fragment's maximum state is capped via setMaxLifecycle.
FragmentStateAdapter.FragmentTransactionCallback.OnPostEventListener

Called right before the Fragment is added to adapter's FragmentManager.
FragmentStateAdapter.FragmentTransactionCallback.OnPostEventListener

Called right before the Fragment is removed from adapter's FragmentManager.
FragmentStateAdapter.FragmentTransactionCallback.OnPostEventListener

Called right before Fragment's state is being saved through a saveFragmentInstanceState call.

Public constructors

FragmentTransactionCallback

Added in 1.1.0
FragmentTransactionCallback()

Public functions

onFragmentMaxLifecyclePreUpdated

Added in 1.1.0
fun onFragmentMaxLifecyclePreUpdated(
    fragment: Fragment,
    maxLifecycleState: Lifecycle.State
): FragmentStateAdapter.FragmentTransactionCallback.OnPostEventListener

Called right before Fragment's maximum state is capped via setMaxLifecycle.

Parameters
fragment: Fragment

Fragment to have its state capped
maxLifecycleState: Lifecycle.State

Ceiling state for the fragment
Returns
FragmentStateAdapter.FragmentTransactionCallback.OnPostEventListener

Listener called after the operation

onFragmentPreAdded

Added in 1.1.0
fun onFragmentPreAdded(fragment: Fragment): FragmentStateAdapter.FragmentTransactionCallback.OnPostEventListener

Called right before the Fragment is added to adapter's FragmentManager.

Parameters
fragment: Fragment

Fragment changing state
Returns
FragmentStateAdapter.FragmentTransactionCallback.OnPostEventListener

Listener called after the operation

onFragmentPreRemoved

Added in 1.1.0
fun onFragmentPreRemoved(fragment: Fragment): FragmentStateAdapter.FragmentTransactionCallback.OnPostEventListener

Called right before the Fragment is removed from adapter's FragmentManager.

Parameters
fragment: Fragment

Fragment changing state
Returns
FragmentStateAdapter.FragmentTransactionCallback.OnPostEventListener

Listener called after the operation

onFragmentPreSavedInstanceState

Added in 1.1.0
@FragmentStateAdapter.ExperimentalFragmentStateAdapterApi
fun onFragmentPreSavedInstanceState(fragment: Fragment): FragmentStateAdapter.FragmentTransactionCallback.OnPostEventListener

Called right before Fragment's state is being saved through a saveFragmentInstanceState call.

Parameters
fragment: Fragment

Fragment which state is being saved
Returns
FragmentStateAdapter.FragmentTransactionCallback.OnPostEventListener

Listener called after the operation