android - How to Logout facebook button completely include (change text 'log out' to 'log in with facebook' ) from another activity -

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i trying logout fb button activity problem when logout activity.facebook button show logout text , not logout means again click on logout logout fb button.

try 

if (accesstoken.getcurrentaccesstoken() == null) {             return; // logged out         }else {             new graphrequest(accesstoken.getcurrentaccesstoken(), "/me/permissions/", null, httpmethod.delete, new graphrequest                     .callback() {                 @override                 public void oncompleted(graphresponse graphresponse) {                      loginmanager.getinstance().logout();                  }             }).executeasync();         }

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