How to use Android Application global SharedPreference in Fragments

Question

I have a 'SharedPreference' in my Android Application class file like this :

public class App extends Application {
    public static Context context;
    public static SharedPreferences preference;
    @Override
    public void onCreate() {
        super.onCreate();
        context = getApplicationContext();
        preference = PreferenceManager.getDefaultSharedPreferences(context);
   }
}

I put values to preference from a long running background service, so when I want to update my fragment content on fragment resume from this preference, in first load of activity and fragment everything is OK, but when I switch fragments, my fragment contents doesn't get updated. Please help with this.

score 0 · Answer 1 · answered Aug 10 '15 at 13:05

0

To get the instance of your preference in any fragment you can use following code.

((App)getActivity().getApplication()).preference

I can see that your preference refrence is declared as static. If there is no particular reason to keep it static you can remove the static modifier.

answered Aug 10 '15 at 13:05

techierishi

413
3
14

I set preference field static to access it from anywhere in my application without creating instance from App class. I want to read preference data in Background Services, Activities, Fragments and BroadcastReceivers. I am in trouble only by Fragments. – Sadjad Abbasnia Aug 11 '15 at 18:16

score 0 · Answer 2 · edited May 23 '17 at 12:06

0

Judging by this answer Fragment onResume() not called your onResume() is not called when the fragment is swapped and recreated again.

I suggest you try to update your data in onCreateView(). You can access the shared preferences from the fragment using getActivity().getSharedPreferences(...)

edited May 23 '17 at 12:06

Community

1
1

answered Aug 10 '15 at 13:13

cvetanov

363
1
3
12

How to use Android Application global SharedPreference in Fragments

2 Answers2