Has anyone crossed into this kind of error? Appare...

# compose-android

[Lisandro Di Meo]

Has anyone crossed into this kind of error? Apparently the rendering is not working properly for a Compose App on API < 29. Any clues? I don't know if it's an emulator thing, I don't have a Physical Device with that API version 🧵.

[Lisandro Di Meo]

Screen Recording 2024-10-09 at 7.46.34 PM.mov

Screen Recording 2024-10-09 at 7.46.34 PM.mov

[romainguy]

Looks like underdraw, and you’re missing a background somewhere

[Lisandro Di Meo]

Yeah, the background is not a big issue. By underdraw, you're referring to the components when moving they're left on the screen?

[Lisandro Di Meo]

note that the only thing I'm doing is opening the keyboard, and when it's closed, the content is like replicated over the screen

[romainguy]

Yeah that’s caused by underdraw

[romainguy]

Your app is not drawing in that area, usually because there’s nobackground on the window/in the layouts

[Lisandro Di Meo]

I see. Is there a reason why this happens in api < 29?

[Lisandro Di Meo]

Added this to the 'main' container of the app, and it seems that is fixed

.background(LocalColorScheme.current.bgApp)

[Lisandro Di Meo]

but It wasn't necessary on API 29 and above

[romainguy]

Without knowing what else you do in your app it’s hard to answer. Activities always have a background by default

[Lisandro Di Meo]

It's just a NavHost inside an activity. And you can navigate between screens. I can provide more details. Probably the theme of the activity is missing a background?

[Sergey Y.]

I saw someone complaining about a similar issue, and it turned out that "android:hardwareAccelerated=true" had been added to the Manifest.

[romainguy]

That shouldn't matter, hw acceleration is on by default

[Sergey Y.]

I know, it caught me by surprise as well.

[Lisandro Di Meo]

I think that a drawing behavior changed from api 29. In any case, thanks for the help!

[Sergey Y.]

I’m not seeing anything like that on any of the supported APIs. 🤔

[Lisandro Di Meo]

Me neither, it's just a theory that came to my mind. I've tested both physical and emulator devices from api 30 onwards, and that modifier wasn't necessary