Activities and Places - Enabling History to reflect an updated data item

You need to somehow notify your cached data that it has changed; there are many ways to do that depending on how you architected things.

You could have the cached list in a "holder" class and simply call a method on it from your update activity.
Or you could send an event in the event bus for more decoupling.
Or you could mediate all data access through a class that handles the caching and could update the cached list in-place.

And when your list activity starts, either unconditionnally update your view, or check whether the list has changed before doing so.

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