Can I Write To Android Sharedpreference For A Different Package?

I've written a game which I intend to upload to the marketplace as a free demo, and I intend to offer a full version for a buck. I'd like to make the download for the full version

Solution 1:

Android sharedpreferences for an application come in 4 modes.

• MODE_PRIVATE is used the most and only internal to the app

• MODE_WORLD_READABLE is used if you want your preferences to be read by another application

• MODE_WORLD_WRITEABLE is deprecated API 17 onwards.

• MODE_MULTI_PROCESS can be modified by multiple processes.

When an application wants to write preferences,it is called by Context.getSharedPreferences (String name, int mode).

So it is possible to read the preferences.But to write it that particular app should be using MODE_WORLD_WRITEABLE which is deprecated.

Moral:You cannot alter the preferences of other applications.

And you really should not want to do it either