android - How to do this query in background with AutoCompleteTextView? -


i've made code:

 public view oncreateview(final layoutinflater inflater, viewgroup container, bundle savedinstancestate) {     view view = inflater.inflate(r.layout.fragment_search, container, false);     button search = (button)view.findviewbyid(r.id.cerca);     andata = (autocompletetextview)view.findviewbyid(r.id.andata);     ritorno = (autocompletetextview)view.findviewbyid(r.id.ritorno);     //set adapters      parsequery<parseobject>query = parsequery.getquery("stations");      query.findinbackground(new findcallback<parseobject>()     {         @override         public void done(list<parseobject> list, parseexception e)         {             if(e == null)             {                 for(int = 0; i<list.size();i++)                 {                     string name = list.get(i).getstring("code");                     stationnames.add(name);                  }                  string [] stradapter = new string[stationnames.size()];                 stradapter=stationnames.toarray(stradapter);                 arrayadapter<string>adapter = new arrayadapter<string>(getactivity(),android.r.layout.simple_list_item_1,stradapter);                 andata.setadapter(adapter);                 ritorno.setadapter(adapter);              }             else             {               e.printstacktrace();             }          }     });

and problem there 50k stations download parse..my question is: it's possible start download after 3 character written? example after digit "pin" query parse starts... thank


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