FragmentManager

Kotlin |Java

abstract class FragmentManager : FragmentResultOwner

kotlin.Any
↳	androidx.fragment.app.FragmentManager

Static library support version of the framework's android.app.FragmentManager. Used to write apps that run on platforms prior to Android 3.0. When running on Android 3.0 or above, this implementation is still used; it does not try to switch to the framework's implementation. See the framework FragmentManager documentation for a class overview.

Your activity must derive from FragmentActivity to use this. From such an activity, you can acquire the FragmentManager by calling FragmentActivity#getSupportFragmentManager.

Summary

Nested classes
abstract	`BackStackEntry` Representation of an entry on the fragment back stack, as created with `FragmentTransaction.addToBackStack()`.
abstract	`FragmentLifecycleCallbacks` Callback interface for listening to fragment state changes that happen within a given FragmentManager.
abstract	`OnBackStackChangedListener` Interface to watch for changes to the back stack.

Constants
static Int	`POP_BACK_STACK_INCLUSIVE` Flag for `popBackStack(String, int)` and `popBackStack(int, int)`: If set, and the name or ID of a back stack entry has been supplied, then all matching entries will be consumed until one that doesn't match is found or the bottom of the stack is reached.

Public constructors
`<init>()` Static library support version of the framework's `android.app.FragmentManager`.

Public methods
open Unit	`addFragmentOnAttachListener(@NonNull listener: FragmentOnAttachListener)` Add a `FragmentOnAttachListener` that should receive a call to `FragmentOnAttachListener#onAttachFragment(FragmentManager, Fragment)` when a new Fragment is attached to this FragmentManager.
open Unit	`addOnBackStackChangedListener(@NonNull listener: FragmentManager.OnBackStackChangedListener)` Add a new listener for changes to the fragment back stack.
open FragmentTransaction	`beginTransaction()` Start a series of edit operations on the Fragments associated with this FragmentManager.
Unit	`clearFragmentResult(@NonNull requestKey: String)`
Unit	`clearFragmentResultListener(@NonNull requestKey: String)`
open Unit	`dump(@NonNull prefix: String, @Nullable fd: FileDescriptor?, @NonNull writer: PrintWriter, @Nullable args: Array<String!>?)` Print the FragmentManager's state into the given stream.
open static Unit	`enableDebugLogging(enabled: Boolean)` Control whether the framework's internal fragment manager debugging logs are turned on.
open static Unit	`enableNewStateManager(enabled: Boolean)` Control whether FragmentManager uses the new state manager that is responsible for: Moving Fragments through their lifecycle methods Running animations and transitions Handling postponed transactions This must only be changed before any fragment transactions are done (i.e., in your
open Boolean	`executePendingTransactions()` After a `FragmentTransaction` is committed with `FragmentTransaction.commit()`, it is scheduled to be executed asynchronously on the process's main thread.
open static F	`findFragment(@NonNull view: View)` Find a `Fragment` associated with the given `View`.
open Fragment?	`findFragmentById(@IdRes id: Int)` Finds a fragment that was identified by the given id either when inflated from XML or as the container ID when added in a transaction.
open Fragment?	`findFragmentByTag(@Nullable tag: String?)` Finds a fragment that was identified by the given tag either when inflated from XML or as supplied when added in a transaction.
open FragmentManager.BackStackEntry	`getBackStackEntryAt(index: Int)` Return the BackStackEntry at index index in the back stack; entries start index 0 being the bottom of the stack.
open Int	`getBackStackEntryCount()` Return the number of entries currently in the back stack.
open Fragment?	`getFragment(@NonNull bundle: Bundle, @NonNull key: String)` Retrieve the current Fragment instance for a reference previously placed with `putFragment(Bundle, String, Fragment)`.
open FragmentFactory	`getFragmentFactory()` Gets the current `FragmentFactory` used to instantiate new Fragment instances.
open MutableList<Fragment!>	`getFragments()` Get a list of all fragments that are currently added to the FragmentManager.
open Fragment?	`getPrimaryNavigationFragment()` Return the currently active primary navigation fragment for this FragmentManager.
open Boolean	`isDestroyed()` Returns true if the final `Activity.onDestroy()` call has been made on the FragmentManager's Activity, so this instance is now dead.
open Boolean	`isStateSaved()` Returns `true` if the FragmentManager's state has already been saved by its host.
open Unit	`popBackStack()` Pop the top state off the back stack.
open Unit	`popBackStack(@Nullable nam`