Use SharedPreferences on multi-process mode

Question

I\'ve defined an instance of SharedPreferences that used on multi-process mode.

public class Prefs {

    private static SharedPreferences pref         


        

Answer 1

I've worked around this by combining:

• Providing each process mutually-exclusive access to the SharedPreferences file (such as by using a socket-based locking mechanism)
• Re-initialising the SharedPreferences with the MODE_MULTI_PROCESS flag every time you want to use it to bypass in-memory caching

This seems to work OK, but it hasn't been thoroughly tested in the real world, so I don't know if it's perfectly reliable.

You can see a working example I wrote here.

Warning: Looks like MODE_MULTI_PROCESS has been deprecated in Android M. It might stop working in the future.