android - How to call a fragment from a fragment -

i making application. in application, have fragment contains listview. when click on item should start new fragment displays item website. listview fragment code :

 public class myfragment extends fragment {   private listview mlistviewassociation; private listviewassociationadapter mlistviewassociationadapter; private arraylist<listviewassociations> mlistviewlist;  private progressdialog progressdialog;     public myfragment () {     // required empty public constructor }   @override public view oncreateview(layoutinflater inflater, viewgroup container,                          bundle savedinstancestate) {     // inflate layout fragment     view rootview = inflater.inflate(r.layout.fragment_mwl_associations, container, false);     mlistviewassociation = (listview) rootview.findviewbyid(r.id.association_list);     mlistviewlist = new arraylist<listviewassociations>();     string[] massciation_name ;     final string webs[];     typedarray icons ;     massciation_name = getresources().getstringarray(r.array.association_names);     webs = getresources().getstringarray(r.array.association_websites) ;       icons = getresources().obtaintypedarray(r.array.association_icons);     listviewassociations mytitle ;      for(int = 0 ; i<massciation_name.length ; i++) {         mytitle = new listviewassociations(massciation_name[i],icons.getresourceid(i,r.drawable.ic_launcher));         mlistviewlist.add(mytitle);     }      mlistviewassociationadapter = new listviewassociationadapter(getactivity(),mlistviewlist);     mlistviewassociation.setadapter(mlistviewassociationadapter); 

here handling on clicking on item

    mlistviewassociation.setonitemclicklistener(new adapterview.onitemclicklistener() {         @override         public void onitemclick(adapterview<?> parent, view view, int position,                                 long id) {             blankfragment myfragment = new blankfragment();             fragmentmanager fragmentmanager = getfragmentmanager();             fragmenttransaction fragmenttransaction = fragmentmanager.begintransaction();             fragmenttransaction.replace(r.layout.fragment_mwl_associations, myfragment);             fragmenttransaction.addtobackstack(null);             fragmenttransaction.commit();          }     });      return rootview ;    } 

my blankfragment called :

public class blankfragment extends fragment {   private progressdialog progressdialog;  webview mywebview; private string url  ; public blankfragment() {     // required empty public constructor  }  public void seturl(string url) {     this.url = url; }  public string geturl() {     return url; }  @override public view oncreateview(layoutinflater inflater, viewgroup container,                          bundle savedinstancestate) {     // inflate layout fragment     view rootview = inflater.inflate(r.layout.fragment_blank, container, false);      webview mywebview = (webview) rootview.findviewbyid(r.id.frag_blank);     mywebview.setwebviewclient(new webviewclient());     mywebview.getsettings().setbuiltinzoomcontrols(true);     mywebview.requestfocusfromtouch();     mywebview.setverticalscrollbarenabled(true);     mywebview.sethorizontalscrollbarenabled(true);     mywebview.setverticalscrollbarenabled(true);     mywebview.sethorizontalscrollbarenabled(true);     mywebview.requestfocusfromtouch();     mywebview.getsettings().setjavascriptenabled(true);     mywebview.getsettings().setusewideviewport(true);     mywebview.getsettings().setloadwithoverviewmode(true);      mywebview.addjavascriptinterface(new webappinterface(getactivity()), "android");      mywebview.getsettings().setjavascriptenabled(true);     mywebview.loadurl("www.google.com");     new loadviewtask().execute();     return rootview ; } 

when click on item application crashes. mistake ??

the mistake have done in onitemclick() in line : change

fragmenttransaction.replace(r.layout.fragment_mwl_associations, myfragment); 

to

fragmenttransaction.replace(r.id.container, myfragment); 

here, entered wrong layout id replace, instead add framelayoutcontainer id r.id.container have used add fragment in mainactivity.java.

reference links more helpful: fragments basics