try {
    ContentResolver contentResolver = getContentResolver();
    Cursor peopleCursor = contentResolver.query(
        Contacts.People.CONTENT_URI,
        new String[] {Contacts.People._ID, Contacts.People.DISPLAY_NAME},
        null,
        null,
        Contacts.People._ID);
    Cursor siCursor = contentResolver.query(
        Contacts.ContactMethods.CONTENT_URI,
        new String[] {Contacts.ContactMethods.PERSON_ID, Contacts.ContactMethods.DATA},
        "label=\"secret_identity\"",
        null,
        Contacts.ContactMethods.PERSON_ID);
    CursorJoiner joiner = new CursorJoiner(
        peopleCursor,   //left
        new String[] {Contacts.People._ID}, //left cols
        siCursor,   //right
        new String[] {Contacts.ContactMethods.PERSON_ID});  //right cols

    MatrixCursor cursor = new MatrixCursor(
        new String[] {"_id","name","secret_identity"});

    for (CursorJoiner.Result joinerResult : joiner) {
        switch (joinerResult) {
            case LEFT: //do this when the left row is absolutely unique

                break;
            case BOTH: // handle case where any row with the same key is in both cursors
                String id = peopleCursor.getString(0);
                String name = peopleCursor.getString(1);
                String secret_identity = sipCursor.getString(1);
                cursor.addRow(new String[] {id,name,secret_identity});
                break;
            case RIGHT:
                break;
        }
    }

    startManagingCursor(cursor);
    listAdapter = new SimpleCursorAdapter(
        this,
        R.layout.contacts,
        cursor,
        new String[] {"name"},
        new int[] {R.id.row_name});
    setListAdapter(listAdapter);
} catch (Exception e) {
    e.printStackTrace(); // a little more finesse in exception handling may be called for here
}