CODEWITHSUNDEEP
androidandroid-fragmentsandroid-settings
Crismar
Crismar

Reputation: 63

How can I refresh view after a setting is changed?

I have an app that displays distances and volumes. I have a SettingsFragment that allows me to choose the units for distance, mile or km, and for volume, gallon or liter. Changing between units works but not right away, I have to flip the phone or reset the app to see the changes. I want the setting change to be reflected right away on the main activity but I'm not sure how to accomplish this. I have done some reseach and found a possible solution: The settings guide suggest that I should implement the OnSharedPreferenceChangeListener interface to listen for changes. But this is implemented on PreferenceFragment and not on a different activity. This is a similar solution.

I'm confused on what is the proper way to listen for the setting change on the main activity and how, when the change happens, I should refresh the view. Can anyone please clarify?

Upvotes: 0

Views: 429

Answers (2)

Maicon
Maicon

Reputation: 1

Observer is a good option for your problem.

Here has a sample. OBSERVER

Hope this helps!

Upvotes: 0

Gary Bak
Gary Bak

Reputation: 4798

The answer in the second link, using the onSharedPreferenceChangeListener() is what you need. Setup the listener in the fragment and then notify the main activity with a call in your fragment:

((MainActivity)getActivity()).updateData(updatedData);

You will have to implement the public method updateData(...) in your main activity.

Upvotes: 1

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