android - How to filter list view using search edittext with JSON url -


am using edittext search form json url datas, give search field. search each letter type on edittext filter listview, @ same time listview reload, if edittext empty show current list. how please me...

 @override public void oncreate(bundle savedinstancestate) {     super.oncreate(savedinstancestate);     setcontentview(r.layout.electronic_main);      search = (edittext) findviewbyid(r.id.text_search);     listview = (listview) findviewbyid(r.id.listview);      search.addtextchangedlistener(new textwatcher() {         @override         public void beforetextchanged(charsequence s, int start, int count, int after) {          }          @override         public void ontextchanged(charsequence s, int start, int before, int count) {              arraylist<hashmap<string, string>> arraytemplist = new arraylist<hashmap<string, string>>();             string searchstring = search.gettext().tostring().tolowercase(locale.getdefault());             listview.settextfilterenabled(true);              (int = 0; < arraylist.size(); i++) {                 string currentstring = arraylist.get(i).get(electronic.workername);                 string currentplacestring = arraylist.get(i).get(electronic.location);                 string currentshopstring = arraylist.get(i).get(electronic.shopname);                    if (searchstring.equalsignorecase(currentstring) ||                         searchstring.equalsignorecase(currentshopstring) ||                         searchstring.equalsignorecase(currentplacestring)) {                     arraytemplist.add(arraylist.get(i));                  }       }             adapter = new electronicadapter(electronic.this, arraytemplist);             listview.setadapter(adapter);             adapter.notifydatasetchanged();          }           @override         public void aftertextchanged(editable s) {             adapter.notifydatasetchanged();          }     });      boolean isinternetpresent = cd.isconnectingtointernet(); // true or false      if (isinternetpresent) {         new downloadjson().execute();      } else {          intent lost = new intent(electronic.this, netconnection.class);         startactivity(lost);     }   }   private class downloadjson extends asynctask<void, void, boolean> {      @override     protected void onpreexecute() {         super.onpreexecute();          mprogressdialog = new progressdialog(electronic.this);         mprogressdialog.setmessage("loading...");         mprogressdialog.setindeterminate(false);         mprogressdialog.show();      }      @override     protected boolean doinbackground(void... params) {           arraylist = new arraylist<hashmap<string, string>>();          jsonobject = jsonfunctions                 .getjsonfromurl("http://beta.json-generator.com/api/json/get/d0_dgqt");          try {              jsonarray = jsonobject.getjsonarray("eletronics");              (int = 0; < jsonarray.length(); i++) {                 hashmap<string, string> map = new hashmap<string, string>();                 jsonobject = jsonarray.getjsonobject(i);                   map.put("workername", jsonobject.getstring("workername"));                 map.put("shopname", jsonobject.getstring("shopname"));                 map.put("experience", jsonobject.getstring("experience"));                 map.put("fare", jsonobject.getstring("fare"));                 map.put("location", jsonobject.getstring("location"));                 map.put("rating", jsonobject.getstring("rating"));                 map.put("address", jsonobject.getstring("address"));                 map.put("workerimage", jsonobject.getstring("workerimage"));                 map.put("shopphoto", jsonobject.getstring("shopphoto"));                 map.put("cell", jsonobject.getstring("cell"));                   arraylist.add(map);             }          } catch (jsonexception e) {             e.printstacktrace();         }         return true;     }       @override     protected void onpostexecute(boolean arg) {          listview = (listview) findviewbyid(r.id.listview);         adapter = new electronicadapter(electronic.this, arraylist);          listview.setadapter(adapter);         mprogressdialog.dismiss();      }  } } 

search=(edittext)findviewbyid(r.id.serach);     listview=(listview)findviewbyid(r.id.listview);     listview.setonitemclicklistener(new onitemclicklistener() {          @override         public void onitemclick(adapterview<?> arg0, view arg1, int arg2,                 long arg3) {             // todo auto-generated method stub             string gh = listview.gettextfilter().tostring();             text.settext(gh);         }     });     listview.settextfilterenabled(true);      search.addtextchangedlistener(new textwatcher() {          @override         public void ontextchanged(charsequence arg0, int arg1, int arg2, int arg3) {             // todo auto-generated method stub              string searchstring = search.gettext().tostring().tolowercase(locale.getdefault());              log.d("@w2w2w2w",""+searchstring);              int realtext=searchstring.length();              arraytemplist.clear();              (int = 0; < arraylist.size(); i++) {                     string currentstring = arraylist.get(i).get("name").tostring();                     string currentplacestring = arraylist.get(i).get("city").tostring();                     string currentshopstring = arraylist.get(i).get("landtype").tostring();              if(realtext<=currentstring.length()&&realtext<=currentplacestring.length()&&realtext<=currentshopstring.length())              {                       if (searchstring.equalsignorecase(currentstring.substring(0,realtext)) ||                             searchstring.equalsignorecase(currentshopstring.substring(0,realtext)) ||                             searchstring.equalsignorecase(currentplacestring.substring(0,realtext))) {                         arraytemplist.add(arraylist.get(i));                         adapter = new listviewadapter(edit.this, arraytemplist);                         listview.setadapter(adapter);                     }              }              else{                  adapter.notifydatasetchanged();              }                }}          @override         public void beforetextchanged(charsequence arg0, int arg1, int arg2,                 int arg3) {             // todo auto-generated method stub          }          @override         public void aftertextchanged(editable arg0) {             // todo auto-generated method stub          }     });     // execute downloadjson asynctask      }

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