[Android] Fix: Modal Animation Repeats When Returning from Background 2

[bhavanesh2001]

Note

Are you waiting for the changes in this PR to be merged?
It would be very helpful if you could test the resulting artifacts from this PR and let us know in a comment if this change resolves your issue. Thank you!

Description of Change

This is an alternative (and improved) approach to #28538 and #28522.
As suggested by @PureWeen, a new animation style has been added, and the previous animation logic has been cleaned up.

Befor fix	After fix
before_fix.mov	new_fix.mov

Issues Fixed

Fixes #28492

[PureWeen]

/azp run

[azure-pipelines]

Azure Pipelines successfully started running 3 pipeline(s).

[bhavanesh2001]

I believe this was originally intended for

maui/src/Controls/src/Core/Compatibility/Handlers/ListView/Android/ListViewAdapter.cs

Lines 69 to 70 in acd2a94

	//TODO: MAUI
	//MessagingCenter.Subscribe<ListViewAdapter>(this, Platform.CloseContextActionsSignalName, lva => CloseContextActions());

which clearly isn’t subscribing anymore.
And since ListView is about to be kicked out of the house, I’m removing it.

[bhavanesh2001]

Everything looks good now, but there’s a limitation with this approach:
Once SetWindowAnimations() is applied during PushModalAsync(true), it appears that it cannot be dynamically altered or disabled afterward. As a result, calling PopModalAsync(false) does not suppress the exit animation — the dialog still animates during dismissal.

Call	Status
PushModalAsync(true), PopModalAsync(true)	✅ Works fine — animations play as expected.
PushModalAsync(true), PopModalAsync(false)	⚠️ Exit still animates — pop animation not skipped.
PushModalAsync(false), PopModalAsync(true)	⚠️ No animation plays — pop(true) has no effect.
PushModalAsync(false), PopModalAsync(false)	✅ Works fine — no animations, as expected.

[pictos]

On the after, the first time that you reopen the app I could see an animation very fast, and after that no more. Not sure if it's something that shiuld be fixed or we can ignore. It's definitely better than before

[bhavanesh2001]

Thanks to @PureWeen 's suggestion, I think now animation works perfectly in all cases.

anim.mov

[bhavanesh2001]

On the after, the first time that you reopen the app I could see an animation very fast, and after that no more. Not sure if it's something that shiuld be fixed or we can ignore. It's definitely better than before

Yeah I noticed that too.. But i don't think it's related to animation we set.. because same thing can be seen if we do PushModalAsync(false)

[rmarinho]

/azp run

[bhavanesh2001]

PushingNavigationPageModallyWithShellShowsToolbarCorrectly fails with API 23 😔

[bhavanesh2001]

It seems , using Dialog?.Window?.DecorView.Animation?.SetAnimationListener() only works for explicitly started view animations. It does not get triggered for window-enter/exit animations defined via styles (i.e., SetWindowAnimations).