Get groupposition of listview by String attached to it (android) -

i have listview elements , i'm trying implement basic search listview.

this function creates it's elements:

    listdataheader = new arraylist<string>();     listdatachild = new hashmap<string, list<string>>();     int counter = 0;     (int = 0; i<namesmails.size();i = i+2) {         //namesmails[0] == name && namesmails[1] == phone && namesmails[2] == email         string name = namesmails.get(i);         string mail = namesmails.get(i + 1);         string phone = returnnumber(namesphones,name);         listdataheader.add(name);         list<string> currentname = new arraylist<string>();         currentname.add(phone);         currentname.add(mail);         listdatachild.put(listdataheader.get(counter), currentname);         counter += 1;     } 

now on search have query + know input successful (the name exists in list, don't know how access it).

if (namesmails.contains(query)){     //i want position of queryed name expand-it.     //i've set static number (20) expand , select.     explistview.expandgroup(20)     explistview.setselection(20); } 

how access expandable listview name added expand , set selected?

i got friend apparently isn't user of site if in future needs help, 1 of solutions possible. not solution out there (since there's way access children directly name) came sort of work-around.

i created additional arraylist called onlynames in beginning of class, setting global variable.

in method:

listdataheader = new arraylist<string>(); listdatachild = new hashmap<string, list<string>>(); int counter = 0; (int = 0; i<namesmails.size();i = i+2) {     //namesmails[0] == name && namesmails[1] == phone && namesmails[2] == email     string name = namesmails.get(i);     string mail = namesmails.get(i + 1);     string phone = returnnumber(namesphones,name);     namesonly.add(name);     listdataheader.add(name);     list<string> currentname = new arraylist<string>();     currentname.add(phone);     currentname.add(mail);     listdatachild.put(listdataheader.get(counter), currentname);     counter += 1; } 

i added namesonly.add(name): namesonly has same position on names listdataheader can call out:

if (namesmails.contains(query)){     int el = namesonly.indexof(query);     explistview.expandgroup(el)     explistview.setselection(el); } 

and worked :).