Android; I only have 2 contacts, yet I can obtain 5 from a query, why?

Question

I have setup 2 test contacts in my emulator.

I\'m running the following query, it should pick them both out, populate my domain object, and add to a list. The output

Answer 1

You are querying ContactsContract.Data, which is a generic container that holds a list of various contact details, such as phone numbers, postal codes etc.. You must filter the results for the rows whose ContactsContract.Data.MIMETYPE column equals StructuredPostal.CONTENT_ITEM_TYPE:

So change the query to:

Cursor cursor = cr.query(ContactsContract.Data.CONTENT_URI,
     null, null, ContacsContract.Data.MIMETYPE +  "='" + 
ContactsContract.StructuredPostal.CONTENT_ITEM_TYPE + "'", null);

See ContactsContract.Data

Answer 2

a contact that is registered to multiple groups will show up multiple times if you query the Uri CONTENT_URI = ContactsContract.Data.CONTENT_URI

Add this to your SELECTION:

 + ContactsContract.Data.DATA1 + " = 1 " ;  //show only contacts in group 1

Answer 3

After API 21 We Write this Query for remove contact duplicacy.

String select = ContactsContract.Data.HAS_PHONE_NUMBER + " != 0 AND " + 
ContactsContract.Data.MIMETYPE
                + " = " + ContactsContract.CommonDataKinds.Phone.CONTENT_ITEM_TYPE + " 
AND "+ ContactsContract.Data.RAW_CONTACT_ID + " = " + 
ContactsContract.Data.NAME_RAW_CONTACT_ID;

Cursor cursor = mContent.query(ContactsContract.Data.CONTENT_URI, null, select, 
 null, null);