How to apply searching facility to a listview in android -

i want know how add search functionality listview in android here listview being loaded internet. essential ,thank

please @ psudo code:---  public class searchableadapter extends baseadapter implements filterable {  private list<string>originaldata = null; private list<string>filtereddata = null; private layoutinflater minflater; private itemfilter mfilter = new itemfilter();  public searchableadapter(context context, list<string> data) {     this.filtereddata = data ;     this.originaldata = data ;     minflater = layoutinflater.from(context); }  public int getcount() {     return filtereddata.size(); }  public object getitem(int position) {     return filtereddata.get(position); }  public long getitemid(int position) {     return position; }  public view getview(int position, view convertview, viewgroup parent) {     // viewholder keeps references children views avoid unnecessary calls     // findviewbyid() on each row.     viewholder holder;      // when convertview not null, can reuse directly, there no need     // reinflate it. inflate new view when convertview supplied     // listview null.     if (convertview == null) {         convertview = minflater.inflate(r.layout.list_item, null);          // creates viewholder , store references 2 children views         // want bind data to.         holder = new viewholder();         holder.text = (textview) convertview.findviewbyid(r.id.list_view);          // bind data efficiently holder.          convertview.settag(holder);     } else {         // viewholder fast access textview         // , imageview.         holder = (viewholder) convertview.gettag();     }      // if weren't re-ordering rely on set last time     holder.text.settext(filtereddata.get(position));      return convertview; }  static class viewholder {     textview text; }  public filter getfilter() {     return mfilter; }  private class itemfilter extends filter {     @override     protected filterresults performfiltering(charsequence constraint) {          string filterstring = constraint.tostring().tolowercase();          filterresults results = new filterresults();          final list<string> list = originaldata;          int count = list.size();         final arraylist<string> nlist = new arraylist<string>(count);          string filterablestring ;          (int = 0; < count; i++) {             filterablestring = list.get(i);             if (filterablestring.tolowercase().contains(filterstring)) {                 nlist.add(filterablestring);             }         }          results.values = nlist;         results.count = nlist.size();          return results;     }      @suppresswarnings("unchecked")     @override     protected void publishresults(charsequence constraint, filterresults results) {         filtereddata = (arraylist<string>) results.values;         notifydatasetchanged();     }  } 

}

//in activity or fragment of adapter instantiated :

edittxt.addtextchangedlistener(new textwatcher() {

@override public void ontextchanged(charsequence s, int start, int before, int count) {     system.out.println("text ["+s+"]");      msearchableadapter.getfilter().filter(s.tostring());                            }  @override public void beforetextchanged(charsequence s, int start, int count,         int after) {  }  @override public void aftertextchanged(editable s) { } 

});