Switch tracks by swipe on cover

[Koitharu]

What is it?

• Bugfix (user facing)
• Feature (user facing)
• Codebase improvement (dev facing)
• Meta improvement to the project (dev facing)

Description of changes

Simple implementation of swipe gestures support on cover in player.
I can try to implement this feature using Carousel or ViewPager if it is ok

Fixes the following issues

#94

Any additional information

output.mp4

APK testing

None yet

Due Diligence

• I have read the Contribution Guidelines.
• I have read the Why Are These Features Missing? page.

[OxygenCobalt]

Wow! This is not what I expected today at all. The implementation looks really good, I just have a few requests with the UX:

First, I'm unsure about how user-friendly this is in the context of the layout-h480dp layout. The cover in that layout is small, as can be seen below:

Skipping by swiping the cover alone would be really hard. Ideally, I think the gesture behavior should become some kind of parent ViewGroup that wraps the cover view and the song information within the layout-h480dp layout. Otherwise, it can simply wrap the cover in other layouts.

Additionally, I'd like it more if there was some kind of animated gesture indicator. Otherwise, this behavior is a bit mysterious and janky. For example, a circle with a "skip" icon inside it could grow from the end of the view and then highlight once the skip threshold was met. This is a lot like the "Swipe to Refresh" pattern, but just sideways.

There are a few other ideas I've had regarding this, but I can handle those later since they aren't really part of an MVP of #94. I just want the above issues to be resolved before I merge. If you are having trouble with working on these, I'll also be okay with merging it and then filling in the gaps myself.

Great work!

[OxygenCobalt]

Just bumping this in the case that the notification for my prior comment didn't go through @Koitharu.

[Koitharu]

I can also propose using of ViewPager2 for cover. Pros: user can see previous/next cover art while swiping

[OxygenCobalt]

I agree, but when I tried to do it once, I kept running into a visual bug when reshuffling. You can try on your end @Koitharu.

[Koitharu]

Closed in favor of #503

[OxygenCobalt]

Reopening since #503 turned out to not to create high-quality UX.