How do I make global changes throughout my app in Android?

Question

I have a settings menu in my app which controls the units used throughout the app - metric or US units. So when the user selects one of these in the options in the menu, I w

Answer 1

For just a boolean? If its just a single activity calling SharedPreferencesand assigning it would be fine.

If you have multiple activities in an application you could call it once and load it into a static class and call it that way or subclass the Application class.

But even then it's just a boolean and you should do whatever is most convenient for you.