A colleague of mine tested one of my compose apps on a “Moto Z2 Play” running Android 9.0 and it tur...

# compose

[julioromano]

A colleague of mine tested one of my compose apps on a “Moto Z2 Play” running Android 9.0 and it turned out all composables render always in dark mode.

Android 9 didn’t have dark mode yet but it had a “device theme” setting under “settings -> display -> advanced”.
It seems changing that has no effect whatsoever. Every composable in the app is always displayed as if isSystemInDarkTheme() always returned true.

I have tested on an API28 emulator and can’t reproduce: the composables are always rendered in light mode (as they are supposed to).

Has anyone encountered a similar situation?

[cb]

My guess is that some app has called UiModeManager.setNightMode(). That API was a global toggle up until API 29 so is likely to be the reason

[cb]

If they run an app and call the following, it will reset the value:

val mgr = getSystemService(Context.UI_MODE_SERVICE) as UiModeManager
mgr.nightMode = UiModeManager.MODE_NIGHT_NO

[nitrog42]

On OnePlus devices, dark mode is linked to the "tone" of the screen : https://oneplus.gadgethacks.com/how-to/enable-dark-mode-your-oneplus-with-android-10-0242966/
I wonder if there is something similar on the moto z2