v1.2.0 - Playlist/Shuffle feedback 3-19

[iSupremacy]

I know this app is excellent, free and solo dev so the following is treated as suggestion/advice not demand or complaint.

• The fact that there is a sole playlist includes everything you ever added and wallpapers that you may only be trying once. I dont think this is good. We should be able to make our own playlists at will (named too?)
• It says "swipe left to delete(video from playlist)" this should be re-worded so people wont think its actually deleting the file from their device
• I swear shuffle doesn't work, it just plays the videos in playlist order.
• Cannot multi-select files for import
• Instead of continuous ongoing shuffling playback (which im worried may require additional resources and battery) an alternative variant of shuffle that [changes the wallpaper at point of lock or unlock]

Cheers.

[maocide]

Hey @iSupremacy, thank you for using the app and taking the time to write your ideas here. Let's break these down:

• Re-wording the delete text: You are absolutely right about this wording. Under the hood, the function deletes a copied file from the app's local directory, so I was a bit too literal about the action. "Remove" is much better to avoid panic about original device files. I'll change this string in the very next patch!

• Shuffle not working: The shuffle is actually working, but doing it differently than you might expect! Instead of purely picking a random video every time (which can cause the exact same video to play twice in a row), it completely scrambles your playlist into a new random order behind the scenes, plays through it seamlessly, and then reshuffles again at the end. It's a balanced, non-aggressive randomization, which just isn't very visible if you have a short playlist of only 3 elements.

• Change at Lock/Unlock & Battery concerns: You don't need to worry about battery! Android's WallpaperService natively pauses the engine and stops rendering entirely the second your screen turns off or you open an app. The battery footprint is basically zero when you aren't actively looking at your home screen.
  I actually researched changing wallpapers on lock/unlock previously (see Issue [Feature] New playback mode, Lock screen dependent #24). Because Lock Screen logic is handled by custom OEM SystemUIs (Samsung, Xiaomi, etc.), listening for SCREEN_ON or USER_PRESENT intents is highly fragmented, visually janky, and would actually require an always-active background listener, which would consume more battery. So relying on the natural media timeline is the safest, most battery-efficient way!

• Named Playlists & Multi-select: I love the idea of deeper customization, but since many people appreciate Undead Wallpaper's simplicity, I want to keep it customizable but easy. Every new menu or folder system adds UI clutter.
  Also, from a technical side: to prevent Android from randomly revoking URI permissions, the app actually copies the selected files to its local directory. Adding a multi-select feature means potentially copying gigabytes of video all at once, which could freeze the app and force the user to wait for a massive background process. For now, a simple "Queue" with a few straightforward steps works without overwhelming the UI or the device storage, but I will definitely keep multi-select in the backlog to see if I can find a clean way to do it!

Thanks again for being an awesome tester and contributing to the app's refinement!