FragmentHostCallback

Added in 1.1.0

Kotlin |Java

abstract class FragmentHostCallback<H : Any?> : FragmentContainer

kotlin.Any
↳	androidx.fragment.app.FragmentContainer
	↳	androidx.fragment.app.FragmentHostCallback

Integration points with the Fragment host.

Fragments may be hosted by any object; such as an Activity. In order to host fragments, implement FragmentHostCallback, overriding the methods applicable to the host.

FragmentManager changes its behavior based on what optional interfaces your FragmentHostCallback implements. This includes the following:

androidx.activity.result.ActivityResultRegistryOwner: Removes the need to override .onStartIntentSenderFromFragment or .onRequestPermissionsFromFragment.
FragmentOnAttachListener: Removes the need to manually call FragmentManager.addFragmentOnAttachListener from your host in order to receive FragmentOnAttachListener.onAttachFragment callbacks for the FragmentController.getSupportFragmentManager.
androidx.activity.OnBackPressedDispatcherOwner: Removes the need to manually call FragmentManager.popBackStackImmediate when handling the system back button.
androidx.lifecycle.ViewModelStoreOwner: Removes the need for your FragmentController to call FragmentController.retainNestedNonConfig or FragmentController.restoreAllState.

Parameters
`<H : Any?>`	the type of object that's currently hosting the fragments. An instance of this class must be returned by `onGetHost`.

Summary

Public constructors
`<H : Any?> FragmentHostCallback( context: Context, handler: Handler, windowAnimations: Int )`

Public functions
`open Unit`	`onDump( prefix: String, fd: FileDescriptor?, writer: PrintWriter, args: Array<String>? )` Print internal state into the given stream.
`open View?`	`onFindViewById(id: Int)` Return the view with the given resource ID.
`abstract H`	`onGetHost()` Return the object that's currently hosting the fragment.
`open LayoutInflater`	`onGetLayoutInflater()` Return a `LayoutInflater`.
`open Int`	`onGetWindowAnimations()` Return the window animations.
`open Boolean`	`onHasView()` Return `true` if the container holds any view.
`open Boolean`	`onHasWindowAnimations()` Return `true` if there are window animations.
`open Unit`	`onRequestPermissionsFromFragment( fragment: Fragment, permissions: Array<String>, requestCode: Int )` This function is deprecated. Have your FragmentHostCallback implement {@link ActivityResultRegistryOwner} to allow Fragments to use {@link Fragment#registerForActivityResult(ActivityResultContract, ActivityResultCallback)} with {@link RequestMultiplePermissions}.
`open Boolean`	`onShouldSaveFragmentState(fragment: Fragment)` Return `true` if the fragment's state needs to be saved.
`open Boolean`	`onShouldShowRequestPermissionRationale(permission: String)` Checks whether to show permission rationale UI from a fragment.
`open Unit`	`onStartActivityFromFragment( fragment: Fragment, intent: Intent, requestCode: Int )` Starts a new `Activity` from the given fragment.
`open Unit`	`onStartActivityFromFragment( fragment: Fragment, intent: Intent, requestCode: Int, options: Bundle? )` Starts a new `Activity` from the given fragment.
`open Unit`	`onStartIntentSenderFromFragment( fragment: Fragment, intent: IntentSender, requestCode: Int, fillInIntent: Intent?, flagsMask: Int, flagsValues: Int, extraFlags: Int, options: Bundle? )` This function is deprecated. Have your FragmentHostCallback implement {@link ActivityResultRegistryOwner} to allow Fragments to use {@link Fragment#registerForActivityResult(ActivityResultContract, ActivityResultCallback)} with {@link StartIntentSenderForResult}.
`open Unit`	`onSupportInvalidateOptionsMenu()` Invalidates the activity's options menu.

Inherited functions

From androidx.fragment.app.FragmentContainer

Fragment

instantiate(context: Context, className: String, arguments: Bundle?)

This function is deprecated.

Use setFragmentFactory to control how Fragments are instantiated.

Public constructors