java - Pass Json Object from ViewHolder to Fragment -


i have recyclerview , fragment. want pass jsonobject recyclerview fragment. so, created interface , implemented on fragment , on recyclerview. initialized variable , access method in fragment passing jsonobject it, getting npe when trying access method:

public class productresultslistfragment extends  fragment implements productresultadapterinterface{ //code here  @override public void showresultsinmap(jsonobject mapobject)  {     openmapfragment(mapobject); }

in rv class have following:

public class productsearchadapter extends recyclerview.adapter<productsearchadapter.viewholder>  {  public productresultadapterinterface mproductresultslistener;   .....  if (mapobjects.length()>0) {                                             mproductresultslistener.showresultsinmap(mapobjects); }

the if statement inside viewholder in recyclerview class instance made public.

i have tried casting mproductresultslistener dont know class cast into.

public productresultadapterinterface mproductresultslistener=((productresultadapterinterface ) ?????);

just quick comment: mapobject (jsonobject) created on onclick method inside button in viewholder, cannot pass bundle on oncreate method.

 this.btnmarkitemmap.setonclicklistener(new view.onclicklistener() {             @override             public void onclick(view v) {                  int position  =   getadapterposition();                  switch (v.getid())                 {                     case (r.id.markproductinmap):                          string mapobj=null;                         if (mapobjects !=null)                         {                             string positiondescription=string.valueof(position);                             string productlatlngvalue=txtproductprice.gettext().tostring()+";"+ txtitemlanlong.gettext().tostring();                              //tring mapposition=                              mapobj=mapobjects.optstring(string.valueof(position));                              if (mapobj!="") //button not click remove map                             {                                 btnmarkitemmap.setcolorfilter(color.rgb(0, 0, 0));                                 btnmarkitemmap.settag(color.rgb(0, 0, 0));                                 mapobjects.remove(positiondescription);                             }                             else //button click add map                             //                             {                                 btnmarkitemmap.setcolorfilter(color.rgb(255, 51, 102));                                 btnmarkitemmap.settag(position);                                 try {mapobjects.put(positiondescription, productlatlngvalue);}catch (jsonexception ex){}                                 if (mapobjects.length()>0)                                 {                                     mproductresultslistener.showresultsinmap(mapobjects);                                 }                             }                          }else{                             mapobjects=new jsonobject();                         }                          break;                 }             }         });

where have assigned variable mproductresultslistener? need assign object of fragment passing adapter. otherwise value null , nullpointeexception if call function on null object.

if have, please update question code.


Comments

Post a Comment

Popular posts from this blog

javascript - jQuery: Add class depending on URL in the best way -

i have html progress meter: <div class="col-md-3" style="margin-left: -20px;"> <div class="progress-pos active" id="progess-1"> <div class="progress-pos-inner"> login </div> </div> </div> <div class="col-md-3 progress-pos-container"> <div class="progress-pos" id="progess-2"> <div class="progress-pos-inner"> scan items </div> </div> </div> <div class="col-md-3 progress-pos-container"> <div class="progress-pos" id="progess-3"> <div class="progress-pos-inner"> confirm address </div> </div> </div> <div class="col-md-3 progress-pos-container"> <div class="progress-pos" id="progess-4"> <div class="progress-pos-in...
Read more

caching - How to check if a url path exists in the service worker cache -

i need check if particular url path exists in service worker cache. example, suppose url is: /myserviceworker/service?a=110&b=70 this url exists in cache, there many of them different values of , b. now, suppose want refresh of these urls, how can that? i want know how access key values service worker cache. if know key, plan follows: var url = new url(key); if(url.pathname === "\/myserviceworker/service") refetch key but not sure how cache key , in format is. mean, string or url? cache api has match() method returns promise resolving in response object if match or undefined if no match exists. second parameter object can specify ignoresearch not take account url parameters. the ignoresearch option supported firefox ( chrome status here ). in other hand, retrieve cache entries, can use keys() method.
Read more

Redirect to a HTTPS version using .htaccess -

i need modify .htaccess file redirect urls https version without "www". http://example.com --> https://example.com http://www.example.com --> https://example.com https://www.example.com --> https://example.com this how .htaccess file looks like: rewriteengine on rewritecond %{request_filename} !-d rewritecond %{request_filename} !-f rewriterule ^(.*)$ redirect.php?id=$1&page=$2 [qsa,l] what modifications need make .htaccess in order forward https without "www"? it depends on doing current code. looks file called redirect trying display php page seo friendly url. think might confusing people. anyway, need , force https without www, need 1 more rule above. also second rule needs two capture groups in rewriterule test string because wanting 2 different values using $1 , $2 references. rewriteengine on #rediect www non www and/or http https --- combinations. rewritecond %{http_host} !^example\.com [nc,or] rewritecond %{https} !^...
Read more