# compose

There doesn’t seem to exist a CompositionLocal for Locale in compose right? I can see Locale is there, which only gives you a way to fetch the locale, not to update it, and looking at the implementation it doesn’t seem to use the AppCompatDelegate.setApplicationLocales aka the Per-App Language Preferences API. Oh and also it doesn’t give a java.util.Locale so there’s that. Am I missing something here? How do you folks typically fetch the proper locale in your composables aside from just passing it down the chain all the way through?

LocalContext.current.resources.configuration.locales

although that doesn't really help if you want to change it or react to changes

You should use LocalConfiguration.current.locales.

And by using that you can subscribe to configuration changes.

Right, so I should use LocalConfiguration.current.locales instead of LocalContext… right? Not in addition to it I assume. Also with that said, I assume both of these do not interact with the per-app language APIs, do they? Like if I use those APIs to manage my locale, do you know if that will update the locales inside LocalConfiguration?

Oh uhmm, lint says LocalConfiguration.current.locales requires API 24 or newer though 😵 Is this fixable in some way, with coreLibraryDesugaring or something like that? If not I guess I need to make my own LocalLocale and make sure I am also subscribing to LocalConfiguration.current myself to react to such config changes.

Okay this was silly by me, apparently .locale works fine but is deprecated over .locales which is >API24 only. Anyway, gonna use the deprecated one then.

ConfigurationCompat.getLocales(LocalConfiguration.current) And I believe per-app language API should also update the configuration.

Quite a verbose thing to write, but yeah the solution sounds like it will be this

val locale = ConfigurationCompat.getLocales(LocalConfiguration.current)[0]

This seems to cover all Android versions and I will just double check that it follows the per-app language APIs too.