Get method documentation [Android Documentation]

Returns the user's preferred locale. This may have been overridden for this process with Locale.Default. Since the user's locale changes dynamically, avoid caching this value. Instead, use this method to look it up for each use.

Set method documentation [Android Documentation]

Overrides the default locale. This does not affect system configuration, and attempts to override the system-provided default locale may themselves be overridden by actual changes to the system configuration. Code that calls this method is usually incorrect, and should be fixed by passing the appropriate locale to each locale-sensitive method that's called.