java - how to sort trimmed values in hash map -

i'm having trouble sorting trimmed values in hash map after parsing json string.

//read data string line; while ((line = bufferedreader.readline()) != null) {        result.append(line);        }  jsonobject jsonobjectresult = new jsonobject(result.tostring().trim()); jsonarray jsonarrayapps = jsonobjectresult.getjsonarray("apps"); try {     (int i=0; i<jsonarrayapps.length(); i++)      {          hashmap<string, string> map = new hashmap<string, string>();          jsonobject e = jsonarrayapps.getjsonobject(i);          map.put("name", e.getstring("package").trim() );          map.put("cate", e.getstring("category").trim());          mylist.add(map);  //mylist variable listview      } } catch (jsonexception e) {     log.e("log_tag", "error parsing data "+e.tostring()); } 

the following results

list of installed apps , categories (click view)

i need in sorting out trimmed values sorted data can in own categories. click here

here json code

public class extends asynctask <httpurlconnection, void,void> {     private void getappcategories() throws ioexception, jsonexception     {         bufferedreader bufferedreader = null;         httpurlconnection urlconnection = null;         bufferedwriter bufferedwriter = null;          stringbuilder result = new stringbuilder();          //create json object send webservice         jsonobject jsonobjectsend = new jsonobject();         jsonarray jsonarraypakages = new jsonarray();         packagemanager packagemanager;         list<resolveinfo> listapps; //this list store app in device          try         {             packagemanager = getactivity().getpackagemanager();             intent filterapp = new intent(intent.action_main);             filterapp.addcategory(intent.category_launcher);             listapps = packagemanager.queryintentactivities(filterapp,    packagemanager.get_meta_data);              (resolveinfo app : listapps)             {             jsonarraypakages.put(app.activityinfo.packagename.trim());             }              jsonobjectsend.put("packages", jsonarraypakages);              log.d("json", jsonobjectsend.tostring());              url url = new url("http://getdatafor.appspot.com/data?key=53972606b926d38191a5446fdff89e377873d767fabedf6d");             urlconnection = (httpurlconnection) url.openconnection();             urlconnection.setconnecttimeout(30000); /* milliseconds */             urlconnection.setreadtimeout(30000); /* milliseconds */             urlconnection.setrequestmethod("post");             urlconnection.setrequestproperty("content-type", "application-json");             urlconnection.setdooutput(true); /* allow output send data */             urlconnection.connect();              outputstream outputstream = urlconnection.getoutputstream();             bufferedwriter =  new bufferedwriter(new outputstreamwriter(outputstream));             bufferedwriter.write(jsonobjectsend.tostring());             bufferedwriter.flush();              inputstream inputstream = urlconnection.getinputstream();             bufferedreader = new bufferedreader(new inputstreamreader(inputstream));              //continues (//read line)         }     } }  @override protected void doinbackground(httpurlconnection... params) {     try {             getappcategories();         } catch (ioexception e) {             log.d("tag", "net work error: " + e.getmessage(), e);         } catch (jsonexception e) {             log.d("tag", "json not valid:  " + e.getmessage(), e);         }         return null; } 

for (int i=0; i<jsonarrayapps.length(); i++)      {          hashmap<string, string> map = new hashmap<string, string>();          jsonobject e = jsonarrayapps.getjsonobject(i);          map.put("name", e.getstring("package").trim() );          map.put("cate", e.getstring("category").trim());          mylist.add(map);  //mylist variable listview      } 

here making hashmap each item. need first check hashmap category added if yes, added in existing list otherwise create new list.

hashmap<string, list<string>> mylist = new hashmap<string, list<string>>(); (int i=0; i<jsonarrayapps.length(); i++)      {          jsonobject e = jsonarrayapps.getjsonobject(i);          string appname = e.getstring("package").trim();          string category = e.getstring("category").trim();          list<string> applist = mylist.get(category);          if(applist == null) {             applist = new arraylist<string>();             //add category if not exist             mylist.put(category, applist);          }          applist.add(appname);      } 

btw, need bit tweak inside listview adapter class though (i think).