Question

I use ContentProvider, and SQLiteQueryBuilder:

    @Override
    public Cursor query(Uri uri, String[] projection, String selection,
                        String[] selectionArgs, String sortOrder) {

        SQLiteQueryBuilder qb = new SQLiteQueryBuilder();
        qb.setTables(NEWS_TABLE);

        switch(sUriMatcher.match(uri)){
          case NEWS_ITEM_ID: qb.appendWhere(KEY_ID+ "=" + uri.getPathSegments().get(1));
                           break;
          default: break;
        }

        String orderBy;

        if (TextUtils.isEmpty(sortOrder)) {
              orderBy = KEY_DATE;
            } else {
                /* ______  WANT TO REVERSE IT HERE _____ */
              orderBy = sortOrder;
            }
        Cursor c = qb.query(newsDB, 
                            projection, 
                            selection, selectionArgs, 
                            null, null, 
                            orderBy);

        c.setNotificationUri(getContext().getContentResolver(), uri);

        return c;
    }

How do I use reverse sort order for query? Thanks for any help.

Answer 1

ORDER BY clause in SQL may have ascending or descending order. By default ascending order is used. To set reversed sort order you need to add DESC keyword to the end of ORDER BY clause.

if (TextUtils.isEmpty(sortOrder)) {
    orderBy = KEY_DATE;
} else {
    /* ______  WANT TO REVERSE IT HERE _____ */
    orderBy = KEY_DATE + " DESC";
}