I currently have a free application on the market and I'd like to offer a paid version of it as well. Once the paid version is installed, I want to import the db and shared preferences from the free version so users can uninstall it without losing anything.
The problem is this: in my free version, I don't have a android:sharedUserId
set. If I add one, the app's id on the system changes and I can't access the data anymore. Both apps will be signed using the same certificate. How can I import the data without messing up the permissions of the free app?