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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 -&gt; display -&gt; 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?

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

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```

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