java - Login Facebook in android not working -


i trying implements facebook in app android when write mail , password of facebook no print "dentro1" or "dentro2" or "dentro3". why?

thank you!!

callbackmanager = callbackmanager.factory.create(); loginmanager.getinstance().registercallback(callbackmanager,         new facebookcallback<loginresult>() {             @override             public void onsuccess(loginresult loginresult) {                 system.out.println("dentro1");             }              @override             public void oncancel() {                 system.out.println("dentro2");             }              @override             public void onerror(facebookexception exception) {                 system.out.println("dentro3");             }          }); 

you need below..

@override public void onactivityresult(int requestcode, int resultcode, intent data) {     super.onactivityresult(requestcode, resultcode, data);     callbackmanager.onactivityresult(requestcode, resultcode, data); } 

and..start login permissions want.

loginmanager.getinstance().loginwithreadpermissions(this, arrays.aslist("user_friends")); 

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