Better native predictive back animations for fragments

[Pittvandewitt]

Steps to reproduce

This is more of a discussion than an a bug report.

I noticed that LibreTube (master branch) overrides the default predictive back animations that you get for free when using the navigation component. Because of this it is also not possible to override animations the usual way by setting an enterTransition or an exitTransition. Is this intended?
I created a branch yesterday with the changes I'm proposing: https://github.com/Pittvandewitt/LibreTube/tree/feat/default-animations
It is not fully implemented yet, and it takes a lot more work to do so. The enter animation should be postponed until all data is loaded in the recyclerview, among other things.

What do you think?

Expected behavior

Animations should feel "predictive" by previewing where the user would navigate to

Actual behavior

The default "exit activity" navigation is used, even in fragments

LibreTube version

0.26.0 (58)

Android version

Any

Other details

No response

Acknowledgements

• I have searched the existing issues and this is a new ticket, NOT a duplicate or related to another open issue.
• I have written a short but informative title.
• I will fill out all of the requested information in this form.

[Bnyro]

I noticed that LibreTube (master branch) overrides the default predictive back animations that you get for free when using the navigation component.

When I last tested it, there haven't actually been any predictive back animations between fragments, only between activities. Thus the current workaround.
It's possible that they added support for it recently though, can't tell.

[Pittvandewitt]

This was the missing key: f519168#diff-890c768d5041bf31eb05673f33ad9d0ff7a42a754da46062eec65969d735c7ddR44

The animations will start looking like this by default:

video_2025-01-16_22-52-15.mp4

[Bnyro]

Awesome 👍