Hi all,
Now I have 2 activities that would simultaneously access one data/
settings.
However, two kind of solution can be applied after I study from the
Android Developer's Guild.

One is ContentProvider,
The discription in guild is as:
"Content providers store and retrieve data and make it accessible to
all applications. They're the only way to share data across
applications; there's no common storage area that all Android packages
can access."

and another is SharedPreferences,
"To use preferences that are shared across multiple application
components (activities, receivers, services, providers), you can use
the underlying Context.getSharedPreferences() method to retrieve a
preferences object stored under a specific name."

What is the differenet between these 2 ?

Thanks a lot!

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