android - Use PreferenceActivity and save preferences in ContentProvider, how? -

In Jeff Shark, shows how to save application preferences in the database by a hack on priority activity.

It said

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I like ContentProvider is a type of coding protocol that uses data from different types of storage types, such as databases, Files, XML, network etc.

I will not search for this example because it is not advisable for preferences just to paste in inbuilt ways or how you have seen linked resources.