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FragmentHostCallback

public abstract class FragmentHostCallback
extends FragmentContainer

java.lang.Object
   ↳ androidx.fragment.app.FragmentContainer
     ↳ androidx.fragment.app.FragmentHostCallback<E>


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

FragmentHostCallback(Context context, Handler handler, int windowAnimations)

Public methods

void onDump(String prefix, FileDescriptor fd, PrintWriter writer, String[] args)

Print internal state into the given stream.

View onFindViewById(int id)

Return the view with the given resource ID.

abstract E onGetHost()

Return the object that's currently hosting the fragment.

LayoutInflater onGetLayoutInflater()

Return a LayoutInflater.

int onGetWindowAnimations()

Return the window animations.

boolean onHasView()

Return true if the container holds any view.

boolean onHasWindowAnimations()

Return true if there are window animations.

void onRequestPermissionsFromFragment(Fragment fragment, String[] permissions, int requestCode)

Requests permissions from the given fragment.

boolean onShouldSaveFragmentState(Fragment fragment)

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

boolean onShouldShowRequestPermissionRationale(String permission)

Checks whether to show permission rationale UI from a fragment.

void onStartActivityFromFragment(Fragment fragment, Intent intent, int requestCode, Bundle options)

Starts a new Activity from the given fragment.

void onStartActivityFromFragment(Fragment fragment, Intent intent, int requestCode)

Starts a new Activity from the given fragment.

void onStartIntentSenderFromFragment(Fragment fragment, IntentSender intent, int requestCode, Intent fillInIntent, int flagsMask, int flagsValues, int extraFlags, Bundle options)

Starts a new IntentSender from the given fragment.

void onSupportInvalidateOptionsMenu()

Invalidates the activity's options menu.

Inherited methods

Public constructors

FragmentHostCallback

public FragmentHostCallback (Context context, 
                Handler handler, 
                int windowAnimations)

Parameters
context Context

handler Handler

windowAnimations int

Public methods

onDump

public void onDump (String prefix, 
                FileDescriptor fd, 
                PrintWriter writer, 
                String[] args)

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 String: additional arguments to the dump request.

onFindViewById

public View onFindViewById (int id)

Return the view with the given resource ID. May return null if the view is not a child of this container.

Parameters
id int

Returns
View

onGetHost

public abstract E onGetHost ()

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().

Returns
E

onGetLayoutInflater

public LayoutInflater onGetLayoutInflater ()

Return a LayoutInflater. See Activity.getLayoutInflater().

Returns
LayoutInflater

onGetWindowAnimations

public int onGetWindowAnimations ()

Return the window animations.

Returns
int

onHasView

public boolean onHasView ()

Return true if the container holds any view.

Returns
boolean

onHasWindowAnimations

public boolean onHasWindowAnimations ()

Return true if there are window animations.

Returns
boolean

onRequestPermissionsFromFragment

public void onRequestPermissionsFromFragment (Fragment fragment, 
                String[] permissions, 
                int requestCode)

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

Parameters
fragment Fragment

permissions String

requestCode int

onShouldSaveFragmentState

public boolean onShouldSaveFragmentState (Fragment fragment)

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

Parameters
fragment Fragment

Returns
boolean

onShouldShowRequestPermissionRationale

public boolean onShouldShowRequestPermissionRationale (String permission)

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

Parameters
permission String

Returns
boolean

onStartActivityFromFragment

public void onStartActivityFromFragment (Fragment fragment, 
                Intent intent, 
                int requestCode, 
                Bundle options)

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

Parameters
fragment Fragment

intent Intent

requestCode int

options Bundle

onStartActivityFromFragment

public void onStartActivityFromFragment (Fragment fragment, 
                Intent intent, 
                int requestCode)

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

Parameters
fragment Fragment

intent Intent

requestCode int

onStartIntentSenderFromFragment

public void onStartIntentSenderFromFragment (Fragment fragment, 
                IntentSender intent, 
                int requestCode, 
                Intent fillInIntent, 
                int flagsMask, 
                int flagsValues, 
                int extraFlags, 
                Bundle options)

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

Parameters
fragment Fragment

intent IntentSender

requestCode int

fillInIntent Intent

flagsMask int

flagsValues int

extraFlags int

options Bundle

Throws
IntentSender.SendIntentException

onSupportInvalidateOptionsMenu

public void onSupportInvalidateOptionsMenu ()

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