Описание тега contactscontract
Android's Contacts API is defined in the android.provider.ContactsContract and related classes.
The Android platform provides a Contacts API for managing and integrating contacts from multiple accounts and from other data sources.
To handle overlapping data from multiple sources, the contacts content provider aggregates similar contacts and presents them to users as a single entity.
ContactsContract defines an extensible database of contact-related information. Contact information is stored in a three-tier data model: Contacts, Raw Contacts and Data.
More information can be found in the documentation for the ContactsContract class.