java - Search in listview using edittext -

i need search item in listview.i have easy array of string , array adapter,put code wich find @ different questions , work!but have 1 problem,this search slow , lags 1 letter.i have word "arbuz"(one many others) , print a-nothing,some letter-and words search "a",another-and no words this.i hope unterstand me.how can improve search? code:

public class fragmentwithlist extends listfragment {     listview mainlist;     edittext inputsearch;     public view oncreateview(layoutinflater inflater, viewgroup container, bundle savedinstancestate) {         view v = inflater.inflate(r.layout.fragment_with_list, null);         mainlist = (listview) v.findviewbyid(android.r.id.list);         inputsearch = (edittext)v.findviewbyid(r.id.inputsearch);         return v;       }     public void oncreate(bundle savedinstancestate){         sethasoptionsmenu(true);         super.oncreate(savedinstancestate);      }     public void onactivitycreated(bundle savedinstancestate) {         super.onactivitycreated(savedinstancestate);         string values[] = new string[]{"arbuz","abrikos","banan","cup","charlie","derevo","grusha","ogurets","sliva","jabloko","volk","dom","igra","pharaon","muscle"};         comparator<string> alphabetical_order1 = new comparator<string>() {             public int compare(string object1, string object2) {                 int res = string.case_insensitive_order.compare(object1.tostring(), object2.tostring());                 return res;             }         };          collections.sort(arrays.aslist(values), alphabetical_order1);         final arrayadapter<string> adapter = new arrayadapter<string>(getactivity(),android.r.layout.simple_list_item_1,values);         mainlist.setadapter(adapter);         inputsearch.addtextchangedlistener(new textwatcher() {             @override             public void beforetextchanged(charsequence s, int start, int count, int after) {                 adapter.getfilter().filter(s.tostring());             }              @override             public void ontextchanged(charsequence s, int start, int before, int count) {              }              @override             public void aftertextchanged(editable s) {              }         });     } } 

add following code in aftertextchanged() method

adapter.getfilter().filter(s.tostring());