android - avoid a replaced fragment from calling the previous when screen is rotated -

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hey guys im trying make activity has 1 framelayout changed when item in drawer selected, problem when rotate screen fragment replaced goes previous fragment. ex. opened app , shows me fragment try select fragment drawer fragment b when try rotate while im on fragment b goes fragment a. here code.

 @override     protected void oncreate(bundle savedinstancestate) {         super.oncreate(savedinstancestate);         setcontentview(r.layout.activity_main);          initviews();          passedfragment = this.getintent().getextras().getstring("fragmentclass");          if(savedinstancestate != null){              getsupportfragmentmanager().findfragmentbytag(fragment_tag);          }             switch (passedfragment){                 case "com.serverus.oom.fragments.fragmentagency":                     fragmentclass = fragmentagency.class;                      menuitemreserve = mmenu.finditem(r.id.agency_menu_item);                     break;                 case "com.serverus.oom.fragments.fragmentservices2":                     fragmentclass = fragmentservices2.class;                     menuitemreserve = mmenu.finditem(r.id.services_menu_item);                     break;                 case "com.serverus.oom.fragments.fragmentcontactus":                     fragmentclass = fragmentcontactus.class;                     menuitemreserve = mmenu.finditem(r.id.contact_menu_item);                     break;                 default:                     fragmentclass = fragmentagency.class;                     break;             }         fragmentreplace(fragmentclass);  }    public void fragmentreplace(class fragmentclass) {          try {             fragment = (fragment) fragmentclass.newinstance();         } catch (exception e) {             e.printstacktrace();         }          // insert fragment replacing existing fragment         fragmentmanager fragmentmanager = this.getsupportfragmentmanager();         fragmenttransaction ft = fragmentmanager.begintransaction();                  ft.replace(r.id.flcontent, fragment, fragment_tag).addtobackstack(null); ft.settransition(fragmenttransaction.transit_fragment_close).commit();           }

thanks in advanced

can show code ? better..

maybe because don't store passedfragment in saveinstance , when rotate screen activity recreate itself, passedfragment contains null. "fragmentagency.class" (default value) set when rotate.

this code:

passedfragment = this.getintent().getextras().getstring("fragmentclass");

..return null, because can "fragmentclass" value when activity create @ startactivity(..).

check: http://developer.android.com/training/basics/activity-lifecycle/recreating.html see how use activity state save , load activity data.


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