android - Query last rows from parse.com table? -

i trying query last 20 rows parse.com table. have followed tutorial , generated code below. code returning 20 rows table not last 20 rows. returns first 20 items. how retrieve last 20 rows?

parsequery<parseobject> query = parsequery.getquery("activities"); query.setlimit(20);  query.findinbackground(new findcallback<parseobject>() {     public void done(list<parseobject> scorelist, parseexception e) {     }  }); 

it seems need different sort method on parsequery making. can order query results createddate field:

// sorts results in descending order created date field query.orderbydescending("datecreated"); 

so, in code, like:

//where "createddate", set name of created date field in table. parsequery<parseobject> query = parsequery.getquery("activities"); query.orderbydescending("createddate").setlimit(20);  query.findinbackground(new findcallback<parseobject>() {     public void done(list<parseobject> scorelist, parseexception e) {     }  }); 

in end, first 20 results, results ordered other way around, should work intended.