If you have achieved it in 1.5 then there can be a small difference of URI. You should go for updated/changed URI of Contacts in 2.1. For further understanding here is a sample code for 2.1updated:
ContentResolver cr = getContentResolver();
Cursor cur = cr.query(ContactsContract.Contacts.CONTENT_URI, null, null, null, null);
while (cur.moveToNext())
{
String id = cur.getString(cur.getColumnIndex(ContactsContract.Contacts._ID));
//---------------------------------------- Contact Names
//------------------------------------------------------
String DisplayName = cur.getString(cur.getColumnIndex(ContactsContract.Contacts.DISPLAY_NAME));
Cursor names = cr.query(ContactsContract.Data.CONTENT_URI, null,ContactsContract.Data.CONTACT_ID + " = " + id, null, null);
names.moveToNext();
String GivenName = names.getString(names.getColumnIndex(ContactsContract.Data.DATA2));
String FamilyName = names.getString(names.getColumnIndex(ContactsContract.Data.DATA3));
String MiddleName = names.getString(names.getColumnIndex(ContactsContract.Data.DATA5));
names.close();
//----------------------------------------- Phone Numbers
//-------------------------------------------------------
String hasPhoneNumber = cur.getString(cur.getColumnIndex(ContactsContract.Contacts.HAS_PHONE_NUMBER));
if (hasPhoneNumber.equals("1"))
{
Cursor phones = getContentResolver().query(ContactsContract.CommonDataKinds.Phone.CONTENT_URI, null, ContactsContract.CommonDataKinds.Phone.CONTACT_ID +" = "+ id,null, null);
while (phones.moveToNext())
{
......
}
}
} // AND SO ON.... Get which ever data you need.
so above is just a sample code that I used for my task. You can get what you need by making changes accordingly. I hope it helps.