android - Facebook SDK 3 - Session Re-log in issue -

i'm using facebook login described in "getting started" document - https://developers.facebook.com/docs/getting-started/facebook-sdk-for-android/3.0/

 // start facebook login session.openactivesession(this, true, new session.statuscallback() {    // callback when session changes state   @override   public void call(session session, sessionstate state, exception exception) {     if (session.isopened()) {        // make request /me api       request.executemerequestasync(session, new request.graphusercallback() {          // callback after graph api response user object         @override         public void oncompleted(graphuser user, response response) {           if (user != null) {             textview welcome = (textview) findviewbyid(r.id.welcome);             welcome.settext("hello " + user.getname() + "!");           }         }       });     }   } }); 

when using code facebook recognize user (that loged-in in facebook app) , assumes user want log in with.

let's want leave decision facebook account use user. how can that?

things i've tried far:

1)perform user log in this:

 sessiontracker sessiontracker = new sessiontracker(activity, new statuscallback() {              @override             public void call(session session, sessionstate state, exception exception) {             }         }, null, false);          if (sessiontracker.getsession() == null || sessiontracker.getsession().getstate().isclosed()) {             sessiontracker.setsession(null);             session session = new session.builder(activity).setapplicationid(activity.getstring(r.string.fb_app_id)).build();             session.setactivesession(session);         }          final session currentsession = sessiontracker.getsession();          if (!currentsession.isopened()) {              session.openrequest openrequest = null;             openrequest = new session.openrequest(activity);              if (openrequest != null) {                 openrequest.setdefaultaudience(sessiondefaultaudience.friends);                 openrequest.setpermissions(arrays.aslist("email", "publish_actions"));                 openrequest.setloginbehavior(sessionloginbehavior.suppress_sso);                 openrequest.setcallback(new statuscallback() {                      @override                     public void call(session session, sessionstate state, exception exception) {                          request.executemerequestasync(currentsession, new request.graphusercallback() {                              @override                             public void oncompleted(graphuser user, response response) {                                 authlistener.oncompleteauthorization(user != null, user, currentsession.getaccesstoken(), currentsession.getexpirationdate().gettime());                             }                         });                      }                 });                 currentsession.openforpublish(openrequest); 

this works fine first time, second time been called (let's after user loggin out app, , want re-login facebook account) remembers last user logged in. !!even after uninstall facebook app , app!!!!

2) calling same code before log in again:

 if (session.getactivesession() != null) {             session.getactivesession().closeandcleartokeninformation();         } 

it not anything...

please me understand how can clear previous facebook user history / cached tokens, achieve following behavior: every time user perform facebook login - facebook "enter email + password" dialog appear...

thanks in advance..

first of all, not use sessiontracker directly. it's not public class, , not meant consumed directly.

secondly, if want pop email/password dialog every time, need disable sso login. can have inside switchusersample how multiple sessions, here's gist of it:

session s = new session(this); session.setactivesession(s); session.openrequest request = new session.openrequest(this); request.setpermissions(...); // note cannot set email , publish_actions in same request request.setloginbehavior(sessionloginbehavior.suppress_sso); request.setcallback(...); s.openforread(request); 

some time later, in callback, should check if session opened, , if contains publish_actions permission, , if not request additional publish permissions (see scrumptious sample example).

lastly, when user logs out, call closeandcleartokeninformation() method you've done previously. since you're forcing dialog login now, work expect to.