android - How to request new facebook permission without logging out -

i integrating facebook login , publish feed in application. , using android simple facebook

i implemented login flow, , working on publish flow. want following:

when user clicks on share facebook button in app, don't want publish directly want publish permission can publish later (similar instagram, permission @ first , publish when add photo).

for have done this:

if (msimplefacebook.islogin()) {     //the user logged in proceed     if (msimplefacebook.getgrantedpermissions().contains(         permission.publish_action.getvalue())) {         haspermission = true;     } else {         //we don't have permission request it.         msimplefacebook.requestnewpermissions(             socialutilities.getfacebookpublishpermissions(), true,             newpermissionlistener);     } } 

however if logged in , have session prompted login again before getting permission. have looked in code of simple facebook library , appears logging out , logging in again, , after login requests new permission.

i want ask, why done that? can't request new permission without logging out in again (similar instagram) ? overriding behavior in library impossible sessionmanager private , non accessible.

so there way request new permission without logging out , forcing user login again, using library? or have put aside , implement scratch using native facebook sdk?

thank or clarifications on matter

edit: clarification. in facebook sdk can request new permissions, , user presented new permission screen accept. similar instagram , i'm ok that, that's want. want know why simple facebook library forcing logout before doing so, there way override or have stop using library , reimplement using native facebook sdk? thank

note: please use latest fbandroid api better options , easy integrate.

if want publish permission @ beginning use following code facebook loginbutton

private static final list<string> permissions = arrays.aslist("publish_actions"); 

else use following permissions login user details

private static final list<string> permissions = arrays.aslist("public_profile","user_friends"); 

example:(request 1 permission @ time,don't use both)

loginbutton.setreadpermissions(permissions); 

for requesting new permissions use following

private void requestfor_new_permissions() {        session session = session.getactivesession();          if (session != null)         {               // check whether have granted these permissions                  list<string> permissions = session.getpermissions();               if (!issubsetof(permissions, permissions))               {                  session.newpermissionsrequest newpermissionsrequest = new session                         .newpermissionsrequest(this, permissions);                  session.requestnewpublishpermissions(newpermissionsrequest);                   return;              }           else           {               //publish items           }         } }  private boolean issubsetof(collection<string> subset, collection<string> superset) {     (string string : subset) {         if (!superset.contains(string)) {             return false;         }     }     return true; }