Content Providers expose an application's data across all other applications, you can use content providers to store or retrieve data of one application from any other application. It is a part of the building blocks of the Android platform, are the only way to share data between applications. This article will focus on the data-sharing mechanism offered by Android.

Android ships with a number of content providers for common data types (audio, video, images, personal contact information, and so on). You can see some of them listed in the below table:

Contacts Interfaces for Android 1.x Support

Interface Contents
Contacts.OrganizationColumns Organization
Contacts.PeopleColumns People
Contacts.SettingsColumns Phone settings
Contacts.ContactMethodsColumns Contact methods
Contacts.ExtensionsColumns Phone extensions
Contacts.GroupsColumns Groups
Contacts.PhonesColumns Phone numbers
Contacts.PhotosColumns Contact photographs
Contacts.PresenceColumns IM presences

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