Get a contact's groups?

Question

I\'m trying to make a many-to-many mapping of contacts to groups.

For example, if I have:

• User 1, belongs to group 701, 702, 704
• User 2, belon

Answer 1

    Cursor dataCursor = getContentResolver().query(
            ContactsContract.Data.CONTENT_URI,
            new String[]{
                    ContactsContract.Data.CONTACT_ID,
                    ContactsContract.Data.DATA1
            },
            ContactsContract.Data.MIMETYPE + "=?",
            new String[]{ContactsContract.CommonDataKinds.GroupMembership.CONTENT_ITEM_TYPE}, null
    );

By using this dataCursor you will get the contact_id and group_id of all contacts in the contact database.

    Cursor groupCursor = getContentResolver().query(
            ContactsContract.Groups.CONTENT_URI,
            new String[]{
                    ContactsContract.Groups._ID,
                    ContactsContract.Groups.TITLE
            }, null, null, null
    );

By using this groupCursor you will get the group_id and group_title of all groups in the contact database.

So if you want to get all groups associated with a contact_id the first get the dataCursor using suitable select statements. Using dataCursor you can get all the group_id associated with that contact_id. Now using groupCursor you can get the information about all groups associated with that specific contact.

Answer 2

A complete answer will be: First the fetch the group cursor (same as the answer above)

Cursor groups_cursor= getContentResolver().query(
        ContactsContract.Groups.CONTENT_URI,
        new String[]{
                ContactsContract.Groups._ID,
                ContactsContract.Groups.TITLE
        }, null, null, null
);

Store all the group_id and group_title in a groups HashMap using this code:

 if(groups_cursor!=null){
        while(groups_cursor.moveToNext()){
            String group_title = groups_cursor.getString(1);
            String id = groups_cursor.getString(0);
            groups.put(id, group_title);
        }
    }

Then using the above answer's data_cursor, fetch contacts_ids and their group_ids.

Cursor dataCursor = getContentResolver().query(
        ContactsContract.Data.CONTENT_URI,
        new String[]{
                ContactsContract.Data.CONTACT_ID,
                ContactsContract.Data.DATA1
        },
        ContactsContract.Data.MIMETYPE + "=?",
        new String[]{ContactsContract.CommonDataKinds.GroupMembership.CONTENT_ITEM_TYPE}, null
);

Now using the dataCursor and the groups HashMap.

    if(dataCursor!=null){
            while(dataCursor.moveToNext()){
                String id  = dataCursor.getString(0);
                String group_id= dataCursor.getString(1);
                String groupTitle = groups.get(group_id);
                Log.d(TAG, "groupTitle : " + groupTitle + " contact_id: " + id );
           }
  }

Answer 3

 public static HashMap<String, String> getContactsForGroup(String groupID, Activity activity){
    Cursor dataCursor = activity.getContentResolver().query(
            ContactsContract.Data.CONTENT_URI,
            new String[]{                                                       // PROJECTION
                    ContactsContract.Data.CONTACT_ID,
                    ContactsContract.Data.DISPLAY_NAME,         // contact name
                    ContactsContract.Data.DATA1                 // group
            },
            ContactsContract.Data.MIMETYPE + " = ? " + "AND " +                 // SELECTION
            ContactsContract.Data.DATA1 +    " = ? ",           // set groupID
            new String[]{                                                       // SELECTION_ARGS
                    ContactsContract.CommonDataKinds.GroupMembership.CONTENT_ITEM_TYPE,
                    groupID
            },
            null
    );

    dataCursor.moveToFirst();
    HashMap<String, String> map = new HashMap<>();
    while (dataCursor.moveToNext()) //
    {
        String s0 = dataCursor.getString(0);                //contact_id
        String s1 = dataCursor.getString(1);                //contact_name
        String s2 = dataCursor.getString(2);                //group_id
        Log.d("tag", "contact_id: " + s0 + "  contact: " + s1 + "   groupID: "+ s2);
        map.put(s0, s1);
    }
    return map;
}