android - How to Search items in alphabetically in Listview through Base Adapter -

i want search items list view alphabetically on click on edittext not getting how this

serch_item.addtextchangedlistener(new textwatcher() {                 @override                   public void ontextchanged(charsequence s, int start, int before, int count) {                     // todo auto-generated method stub                      text = serch_item.gettext().tostring();                     //  approvedfriendlist.setfiltertext(text);                 }                 @override                 public void beforetextchanged(charsequence s, int start, int count,                         int after) {                     // todo auto-generated method stub                 }                 @override                 public void aftertextchanged(editable s) {                     // todo auto-generated method stub                  }             }); 

search_item editext , items coming through base adapter if user types name on edittext item should visible or searched

take 1 edittext & in ontextchangelistner filter listview ...

private class modelfilter extends filter         {              @override             protected filterresults performfiltering(charsequence constraint) {                  constraint = constraint.tostring().tolowercase();                 system.out.println("in performfiltering()");                 filterresults result = new filterresults();                 if(constraint != null && constraint.tostring().length() > 0)                 {                     arraylist<model> filtereditems = new arraylist<model>();                      for(int = 0, l = allmodelitemsarray.size(); < l; i++)                     {                         model m = allmodelitemsarray.get(i);                         if(m.getwebsite().tolowercase().contains(constraint))                             filtereditems.add(m);                     }                     result.count = filtereditems.size();                     result.values = filtereditems;                 }                 else                 {                     synchronized(this)                     {                         result.values = allmodelitemsarray;                         result.count = allmodelitemsarray.size();                     }                 }                 return result;             }              @suppresswarnings("unchecked")             @override             protected void publishresults(charsequence constraint, filterresults results) {                  filteredmodelitemsarray = (arraylist<model>)results.values;                 system.out.println("in publishresults()");                 notifydatasetchanged();                 clear();                 for(int = 0, l = filteredmodelitemsarray.size(); < l; i++)                     add(filteredmodelitemsarray.get(i));                 //notifydatasetinvalidated();             }        } 

your texchangelistner

@override             public void ontextchanged(charsequence s, int start, int before, int count) {                 bookmarkmanageractivity.this.adapter.getfilter().filter(s);                 adapter.notifydatasetchanged();             }                @override             public void beforetextchanged(charsequence s, int start, int count,                     int after) {             }                @override             public void aftertextchanged(editable s) {               }           });