Android - How to detect if night mode is on when using AppCompatDelegate.MODE_NIGHT_AUTO

Question

I'm using Androids built in day/night mode functionality and I'd like to add an option to my app for AppCompatDelegate.MODE_NIGHT_AUTO

I'm having a problem though because my app requires certain things to be colored programmatically, and I can't figure out how to check if the app considers itself in night or day mode. Without that, I can't set a flag to choose the right colors.

Calling AppCompatDelegate.getDefaultNightMode() just returns AppCompatDelegate.MODE_NIGHT_AUTO which is useless.

I don't see anything else that would tell me, but there must be something?

Answer 1

int nightModeFlags =     getContext().getResources().getConfiguration().uiMode &     Configuration.UI_MODE_NIGHT_MASK; switch (nightModeFlags) {     case Configuration.UI_MODE_NIGHT_YES:          doStuff();          break;      case Configuration.UI_MODE_NIGHT_NO:          doStuff();          break;      case Configuration.UI_MODE_NIGHT_UNDEFINED:          doStuff();          break; } 

Answer 2

If you are kotlin developer then you can use below code to judge dark mode.

when (context.resources?.configuration?.uiMode?.and(Configuration.UI_MODE_NIGHT_MASK)) {     Configuration.UI_MODE_NIGHT_YES -> {}     Configuration.UI_MODE_NIGHT_NO -> {}     Configuration.UI_MODE_NIGHT_UNDEFINED -> {} } 

For more about dark theme mode

https://github.com/android/user-interface-samples/tree/main/DarkTheme