How to batch update datas in ContentProvider,something confused me

问题

How can i execute this sql in content Provider as below:

update dtrips set dtp_day_idx=dtp_day_idx+2 where tp_id=1

Can anyone help me fix the code

    DTrip dTrip = new DTrip();
    ContentValues values = createContentValues(dTrip);
    values.put("dtp_day_idx" ,...);
    String select ="tp_id="+tripId;
    mContentResolver.update(UsersColumns.CONTENT_URI, values, select, null);

Thanks.

来源：https://stackoverflow.com/questions/9155395/how-to-batch-update-datas-in-contentprovider-something-confused-me