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Branch: androidx-main
commit 6c888ef738c01518712ed9ae4cbf32c450aec8dc
Author: Ian Lake <ilake@google.com>
Date: Thu Oct 21 14:52:13 2021
Add ComponentDialog
Provide a stripped down equivalent to
ComponentActivity for a Dialog that implements
LifecycleOwner and OnBackPressedDispatcherOwner.
Importantly, this connects the dialog's
OnBackPressedDispatcher to the Dialog
onBackPressed() API, thus ensuring that it
is called while the dialog is on the screen.
Relnote: "Added `ComponentDialog`, a subclass of
`Dialog` that includes an `OnBackPressedDispatcher`
that will be called when the system back button is
pressed when the dialog is visible. Importantly,
this subclass also sets the
`ViewTreeOnBackPressedDispatcherOwner`, allowing views
a generic way to retrieve the correct dispatcher
whether it exists in a `ComponentActivity` or a
`ComponentDialog`."
Test: ComponentDialogTest suite
BUG: 205992875
Change-Id: I8a1bcd3c4e2b4544d4b4460e2e7fd7424af34452
M activity/activity/api/current.txt
A activity/activity/src/androidTest/java/androidx/activity/ComponentDialogTest.kt
M activity/activity/api/public_plus_experimental_current.txt
A activity/activity/src/main/java/androidx/activity/ComponentDialog.kt
M activity/activity/api/restricted_current.txt
il...@google.com
We've added a new ComponentDialog that will be available as part of Activity 1.5.0-alpha01.
ComponentDialog implements LifecycleOwner and more importantly an OnBackPressedDispatcher that plugs into the dialog's onBackPressed() API, thus ensuring that APIs that use ViewTreeOnBackPressedDispatcherOwner (like Activity Compose's BackHandler) would work out of the box as soon as Compose switches to ComponentDialog, which I suspect will be handled as part of
Description
Component used: Activity
Version used: 1.4.0
Right now the only
OnBackPressedDispatcheravailable is the one provided byComponentActivityand hooked into itsonBackPressed(). However, when a dialog is visible, the activity'sonBackPressed()won't be called at all - it is instead theDialogthat intercepts and handles the system back button.It would be nice if all of the
OnBackPressedDispatcherAPIs would also work in these cases, perhaps by also plugging into theDialogclass API ofonBackPressed().