android - Clearing searchable listview -

i following android hive tutorial make custom list view + searchable listview . tutorials easy follow when added getfilter() in lazyadapter , problem occured. seach editbox can filter listview on clearing textview original data of listview not showing.

this code

 package com.example.androidhive;  import java.util.arraylist; import java.util.hashmap;  import android.app.activity; import android.content.context; import android.text.textutils; import android.util.log; import android.view.layoutinflater; import android.view.view; import android.view.viewgroup; import android.widget.baseadapter; import android.widget.imageview; import android.widget.textview;  public class lazyadapter extends baseadapter {      private activity activity;     private arraylist<hashmap<string, string>> data;     private static layoutinflater inflater=null;     public imageloader imageloader;       public lazyadapter(activity a, arraylist<hashmap<string, string>> d) {         activity = a;         data=d;         inflater = (layoutinflater)activity.getsystemservice(context.layout_inflater_service);         imageloader=new imageloader(activity.getapplicationcontext());     }      public int getcount() {         return data.size();     }      public object getitem(int position) {         return position;     }      public long getitemid(int position) {         return position;     }      public view getview(int position, view convertview, viewgroup parent) {         view vi=convertview;         if(convertview==null)             vi = inflater.inflate(r.layout.list_row, null);          textview title = (textview)vi.findviewbyid(r.id.title); // title         textview artist = (textview)vi.findviewbyid(r.id.artist); // artist name         textview duration = (textview)vi.findviewbyid(r.id.duration); // duration         imageview thumb_image=(imageview)vi.findviewbyid(r.id.list_image); // thumb image          hashmap<string, string> song = new hashmap<string, string>();         song = data.get(position);          // setting values in listview         title.settext(song.get(customizedlistview.key_title));         artist.settext(song.get(customizedlistview.key_artist));         duration.settext(song.get(customizedlistview.key_duration));         imageloader.displayimage(song.get(customizedlistview.key_thumb_url), thumb_image);         return vi;     }      public android.widget.filter getfilter() {         // todo auto-generated method stub         return new android.widget.filter() {              @override             protected filterresults performfiltering(charsequence constraint) {                 filterresults result = new filterresults();                 // if constraint empty return original names                 if (textutils.isempty(constraint)){                     //result.values = storedata;                     result.count = data.size();                     result.values = data;                     return result;                 }                  arraylist<hashmap<string, string>> filtered_names = new arraylist<hashmap<string, string>>();                 string filterstring = constraint.tostring().tolowercase();                 string filterablestring;                  for(int = 0; i<data.size(); i++){                     hashmap<string,string> searchdata = data.get(i);                     string itemsearched = searchdata.get(customizedlistview.key_title);                      filterablestring = itemsearched;                     if(filterablestring.tolowercase().contains(filterstring)){                     filtered_names.add(data.get(i));                     log.e("added", string.valueof(filtered_names.size()));                     }                      }                 result.values = filtered_names;                 result.count = filtered_names.size();                 log.e("results", result.values.tostring() + string.valueof(result.count));                 return result;             }              @override             protected void publishresults(charsequence constraint,                     filterresults results) {                 // todo auto-generated method stub                     arraylist<hashmap<string, string>> resultlist = (arraylist<hashmap<string, string>>) results.values;                     lazyadapter.this.data = resultlist;                     lazyadapter.this.notifydatasetchanged();             }          };     } } 

this line lazyadapter.this.data = resultlist; changes value of data, when go in empty constraint part, not modifying current filtering.

keep reference first data set :

1. declaring private arraylist<hashmap<string, string>> origdata;
2. affecting in constructor : origdata = d;
3. using in filter empty constraint case

like follows

result.count = origdata.size(); result.values = origdata;