android - Can't logout from facebook session -

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i have created facebook integrate application. can login , logout correctly no problems, , when login , close app re-open can logout correctly. problem when login run application eclipse can't logout. shows errors.

  @override     protected void oncreate(bundle savedinstancestate) {         super.oncreate(savedinstancestate);            facebook = new facebook(app_id);            masyncrunner = new asyncfacebookrunner(facebook);          sharepref = getpreferences(mode_private);         facebook.setaccesstoken(sharepref.getstring(access_token, null));         facebook.setaccessexpires(sharepref.getlong(expire_session, 0));      buttonlogin.setonclicklistener(new onclicklistener() {             @override             public void onclick(view v) {                 logintofacebook();             }         });  buttonlogout.setonclicklistener(new onclicklistener() {             @override             public void onclick(view v) {                 logoutfacebook();             }         }); }  public void logintofacebook() {           if (!facebook.issessionvalid()) {             facebook.authorize(this, permissions, facebook.force_dialog_auth,                     new dialoglistener() {                         @override                         public void onfacebookerror(facebookerror e) {                         }                          @override                         public void onerror(dialogerror e) {                         }                          @override                         public void oncomplete(bundle values) {                             sharedpreferences.editor editor = sharepref.edit();                             editor.putstring(access_token,                                     facebook.getaccesstoken());                             editor.putlong(expire_session,                                     facebook.getaccessexpires());                             editor.commit();                         }                          @override                         public void oncancel() {                         }                     });         } else {             toast.maketext(getapplicationcontext(), "you login",                     toast.length_short).show();         }     } protected void logoutfacebook() {         if (facebook.issessionvalid()) {             masyncrunner.logout(this,                     new requestlistener() {                         @override                         public void oncomplete(string response, object state) {                             log.d("logout facebook", response);                             if (boolean.parseboolean(response) == true) {                                 log.e("logout facebook", "great");                             }                         }                          @override                         public void onioexception(ioexception e, object state) {                          }                          @override                         public void onfilenotfoundexception(                                 filenotfoundexception e, object state) {                         }                          @override                         public void onmalformedurlexception(                                 malformedurlexception e, object state) {                         }                          @override                         public void onfacebookerror(facebookerror e,                                 object state) {                         }                     });         } else {             toast.maketext(getapplicationcontext(), "login first",                     toast.length_short).show();         }     }

i got type of error:

e/androidruntime( 6331): fatal exception: thread-264 e/androidruntime( 6331): java.lang.illegalargumentexception: invalid context argument e/androidruntime( 6331):    @ android.webkit.cookiesyncmanager.createinstance(cookiesyncmanager.java:86) e/androidruntime( 6331):    @ com.facebook.internal.utility.clearcookiesfordomain(utility.java:261) e/androidruntime( 6331):    @ com.facebook.internal.utility.clearfacebookcookies(utility.java:285) e/androidruntime( 6331):    @ com.facebook.session.closeandcleartokeninformation(session.java:593) e/androidruntime( 6331):    @ com.facebook.android.facebook.logoutimpl(facebook.java:698) e/androidruntime( 6331):    @ com.facebook.android.asyncfacebookrunner$1.run(asyncfacebookrunner.java:89) w/activitymanager( 1202):   force finishing activity com.facebook.androidhive/.androidfacebookconnectactivity w/windowmanager( 1202): failure taking screenshot (246x437) layer 21020 w/trace   ( 6331): unexpected value nativegetenabledtags: 0 w/trace   ( 1202): unexpected value nativegetenabledtags: 0 w/trace   ( 1202): unexpected value nativegetenabledtags: 0 w/trace   ( 1202): unexpected value nativegetenabledtags: 0 w/trace   ( 6239): unexpected value nativegetenabledtags: 0 w/trace   ( 1202): unexpected value nativegetenabledtags: 0 w/trace   ( 1202): unexpected value nativegetenabledtags: 0 w/trace   ( 1202): unexpected value nativegetenabledtags: 0 w/trace   ( 6331): unexpected value nativegetenabledtags: 0 w/trace   ( 1202): unexpected value nativegetenabledtags: 0 w/trace   ( 6239): unexpected value nativegetenabledtags: 0 w/trace   ( 6239): unexpected value nativegetenabledtags: 0 w/trace   ( 6239): unexpected value nativegetenabledtags: 0 w/trace   ( 6239): unexpected value nativegetenabledtags: 0 w/trace   ( 1202): unexpected value nativegetenabledtags: 0 w/trace   ( 1202): unexpected value nativegetenabledtags: 0 e/surfaceflinger(  786): ro.sf.lcd_density must defined build property w/trace   ( 6239): unexpected value nativegetenabledtags: 0 w/trace   ( 6239): unexpected value nativegetenabledtags: 0 w/trace   ( 6239): unexpected value nativegetenabledtags: 0 w/trace   ( 1202): unexpected value nativegetenabledtags: 0 w/trace   ( 6239): unexpected value nativegetenabledtags: 0 w/trace   ( 1202): unexpected value nativegetenabledtags: 0 w/trace   ( 6331): unexpected value nativegetenabledtags: 0 w/trace   ( 1202): unexpected value nativegetenabledtags: 0 w/trace   ( 1202): unexpected value nativegetenabledtags: 0 w/trace   ( 1202): unexpected value nativegetenabledtags: 0 w/trace   ( 1202): unexpected value nativegetenabledtags: 0 w/trace   ( 6239): unexpected value nativegetenabledtags: 0 w/trace   ( 1202): unexpected value nativegetenabledtags: 0 w/trace   ( 1202): unexpected value nativegetenabledtags: 0

try this..

delete below lines mainactivity..

sharepref = getpreferences(mode_private);         facebook.setaccesstoken(sharepref.getstring(access_token, null));         facebook.setaccessexpires(sharepref.getlong(expire_session, 0));

and add below lines inside in login function

  mprefs = getpreferences(mode_private);             string access_token = mprefs.getstring("access_token", null);             long expires = mprefs.getlong("access_expires", 0);              if (access_token != null) {                 facebook.setaccesstoken(access_token); toast.maketext(getapplicationcontext(), "you login",                     toast.length_short).show();             }              if (expires != 0) {                 facebook.setaccessexpires(expires); toast.maketext(getapplicationcontext(), "you login",                     toast.length_short).show();             }

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