Question

I have application with an activity and a service, I need to save some value in the activity and retrieve in the service.

i could save the value using SharedPreferences in the activity, however, when I try to retrieve the value in the BroadcastReceiver, it says getPreferences is undefined for service.

how could I retrieve my value in BroadcastReceiver?

Answer 1

EDITED to reflect change of the original question from Service to BroadcastReceiver.

Instead of using getPreferences(int mode) in the Activity use…

getSharedPreferences(String name, int mode).

The getPreferences(int mode) method is a convenience method for the above and simply passes the Activity class name as the name parameter. This implies it should really only be used for a given Activity to store its own internal preferences and not preferences that need to be global to other app components.

In the case of a BroadcastReceiver the onReceive(...) method is passed a Context parameter so you can use context.getSharePreferences(<some_name>, <mode>) to get the SharedPreferences saved by the Activity.