I’d like to use Muzei to change the wallpaper every day. Unfortunately, the wallpaper reverts to the default after a few minutes. ticari is having the same problem.
I contacted the developer and this was their reply:
Good news: that bug report captured the wallpaper changing back to the default one!
Bad news: it didn’t say who requested the wallpaper change, only a message stating, ‘Wallpaper changed from background app.’
But just before that, I see the Settings app encountering an error whilst trying to read the lock screen wallpaper.
So I looked into Fairphone’s source code and discovered that if retrieving the file representing the lock screen wallpaper fails, they reset the wallpaper.
Of course, for a live wallpaper app like Muzei, there is never a ‘file’ representing the lock screen wallpaper – it is a dynamic background that the app creates on the fly (which is how Muzei offers the double-tap-to-unblur effect, etc.).
The original change that added that code actually had nothing to do with the wallpaper code; the rest of that change involved battery health, so I’m not sure why that code is there in the first place. The default Android operating system doesn’t include anything like this code, which is probably why only Fairphone devices are randomly resetting their wallpaper.
So how can I get Fairphone to fix this issue?