FragmentHostCallback

Kotlin |Java

abstract class FragmentHostCallback<E : 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.

Summary

Public constructors
`<init>(@NonNull context: Context, @NonNull handler: Handler, windowAnimations: Int)`

Public methods
open Unit	`onDump(@NonNull prefix: String, @Nullable fd: FileDescriptor?, @NonNull writer: PrintWriter, @Nullable args: Array<String!>?)` Print internal state into the given stream.
open View?	`onFindViewById(id: Int)`
abstract E?	`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()`
open Boolean	`onHasWindowAnimations()` Return `true` if there are window animations.
open Unit	`onRequestPermissionsFromFragment(@NonNull fragment: Fragment, @NonNull permissions: Array<String!>, requestCode: Int)` Requests permissions from the given fragment.
open Boolean	`onShouldSaveFragmentState(@NonNull fragment: Fragment)` Return `true` if the fragment's state needs to be saved.
open Boolean	`onShouldShowRequestPermissionRationale(@NonNull permission: String)` Checks whether to show permission rationale UI from a fragment.
open Unit	`onStartActivityFromFragment(@NonNull fragment: Fragment, intent: Intent!, requestCode: Int)` Starts a new `Activity` from the given fragment.
open Unit	`onStartActivityFromFragment(@NonNull fragment: Fragment, intent: Intent!, requestCode: Int, @Nullable options: Bundle?)` Starts a new `Activity` from the given fragment.
open Unit	`onStartIntentSenderFromFragment(@NonNull fragment: Fragment, intent: IntentSender!, requestCode: Int, @Nullable fillInIntent: Intent?, flagsMask: Int, flagsValues: Int, extraFlags: Int, @Nullable options: Bundle?)` Starts a new `IntentSender` from the given fragment.
open Unit	`onSupportInvalidateOptionsMenu()` Invalidates the activity's options menu.

Inherited functions

From class FragmentContainer

Fragment

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

Creates an instance of the specified fragment, can be overridden to construct fragments with dependencies, or change the fragment being constructed. By default just calls Fragment#instantiate(Context, String, Bundle).

Public constructors

<init>

FragmentHostCallback(
    @NonNull context: Context, 
    @NonNull handler: Handler, 
    windowAnimations: Int)

Public methods

onDump

open fun onDump(
    @NonNull prefix: String, 
    @Nullable fd: FileDescriptor?, 
    @NonNull writer: PrintWriter, 
    @Nullable args: Array<String!>?
): Unit

Print internal state into the given stream.

Parameters
`prefix`	String: Desired prefix to prepend at each line of output.
`fd`	FileDescriptor?: The raw file descriptor that the dump is being sent to.
`writer`	PrintWriter: The PrintWriter to which you should dump your state. This will be closed for you after you return.
`args`	Array<String!>?: additional arguments to the dump request.

onFindViewById

@Nullable open fun onFindViewById(id: Int): View?

onGetHost

@Nullable abstract fun onGetHost(): E?

Return the object that's currently hosting the fragment. If a Fragment is hosted by a FragmentActivity, the object returned here should be the same object returned from Fragment#getActivity().

onGetLayoutInflater

@NonNull open fun onGetLayoutInflater(): LayoutInflater

Return a LayoutInflater. See Activity#getLayoutInflater().

onGetWindowAnimations

open fun onGetWindowAnimations(): Int

Return the window animations.

onHasView

open fun onHasView(): Boolean

onHasWindowAnimations

open fun onHasWindowAnimations(): Boolean

Return true if there are window animations.

onRequestPermissionsFromFragment

open fun onRequestPermissionsFromFragment(
    @NonNull fragment: Fragment, 
    @NonNull permissions: Array<String!>, 
    requestCode: Int
): Unit

Deprecated: Have your FragmentHostCallback implement ActivityResultRegistryOwner to allow Fragments to use Fragment#registerForActivityResult(ActivityResultContract, ActivityResultCallback) with RequestMultiplePermissions. This method will still be called when Fragments call the deprecated requestPermissions() method.

Requests permissions from the given fragment. See FragmentActivity#requestPermissions(String[], int)

onShouldSaveFragmentState

open fun onShouldSaveFragmentState(@NonNull fragment: Fragment): Boolean

Return true if the fragment's state needs to be saved.

onShouldShowRequestPermissionRationale

open fun onShouldShowRequestPermissionRationale(@NonNull permission: String): Boolean

Checks whether to show permission rationale UI from a fragment. See FragmentActivity#shouldShowRequestPermissionRationale(String)

onStartActivityFromFragment

open fun onStartActivityFromFragment(
    @NonNull fragment: Fragment, 
    intent: Intent!, 
    requestCode: Int
): Unit

Starts a new Activity from the given fragment. See FragmentActivity#startActivityForResult(Intent, int).

onStartActivityFromFragment

open fun onStartActivityFromFragment(
    @NonNull fragment: Fragment, 
    intent: Intent!, 
    requestCode: Int, 
    @Nullable options: Bundle?
): Unit

Starts a new Activity from the given fragment. See FragmentActivity#startActivityForResult(Intent, int, Bundle).

onStartIntentSenderFromFragment

open fun onStartIntentSenderFromFragment(
    @NonNull fragment: Fragment, 
    intent: IntentSender!, 
    requestCode: Int, 
    @Nullable fillInIntent: Intent?, 
    flagsMask: Int, 
    flagsValues: Int, 
    extraFlags: Int, 
    @Nullable options: Bundle?
): Unit

Deprecated: Have your FragmentHostCallback implement ActivityResultRegistryOwner to allow Fragments to use Fragment#registerForActivityResult(ActivityResultContract, ActivityResultCallback) with StartIntentSenderForResult. This method will still be called when Fragments call the deprecated startIntentSenderForResult() method.

Starts a new IntentSender from the given fragment. See Activity#startIntentSender(IntentSender, Intent, int, int, int, Bundle).

onSupportInvalidateOptionsMenu

open fun onSupportInvalidateOptionsMenu(): Unit

Invalidates the activity's options menu. See FragmentActivity#supportInvalidateOptionsMenu()