Android contacts Display Name and Phone Number(s) in single database query?

Try this code:

Uri uri = ContactsContract.CommonDataKinds.Phone.CONTENT_URI;
String[] projection    = new String[] {ContactsContract.CommonDataKinds.Phone.DISPLAY_NAME,
                ContactsContract.CommonDataKinds.Phone.NUMBER};

Cursor people = getContentResolver().query(uri, projection, null, null, null);

int indexName = people.getColumnIndex(ContactsContract.CommonDataKinds.Phone.DISPLAY_NAME);
int indexNumber = people.getColumnIndex(ContactsContract.CommonDataKinds.Phone.NUMBER);

if(people.moveToFirst()) {
    do {
        String name   = people.getString(indexName);
        String number = people.getString(indexNumber);
        // Do work...
    } while (people.moveToNext());
}