java - Facebook login not working with signed application -

i using following code login facebook. login process works while debugging, not work signed application. have added both debug hash key , release hash key in facebook app settings without success. idea causing this?

package com.priyank.safeboard;  import java.util.arrays;  import android.content.intent; import android.os.bundle; import android.util.log; import android.view.layoutinflater; import android.view.view; import android.view.viewgroup; import android.widget.button;  import com.actionbarsherlock.app.sherlockfragment; import com.facebook.session; import com.facebook.sessionstate; import com.facebook.uilifecyclehelper; import com.facebook.widget.loginbutton;  public class mainfragment extends sherlockfragment {      private static final string tag = "mainfragment";     private uilifecyclehelper uihelper;     button b;     loginbutton authbutton;      @override     public view oncreateview(layoutinflater inflater,              viewgroup container,              bundle savedinstancestate) {         view view = inflater.inflate(r.layout.safeboardlogin, container, false);          authbutton = (loginbutton) view.findviewbyid(r.id.authbutton);         authbutton.setfragment(this);           /*b=(button) view.findviewbyid(r.id.button1);         b.setonclicklistener(new view.onclicklistener() {             @override             public void onclick(view v) {               updatedetail();             }           });*/          authbutton.setreadpermissions(arrays.aslist("user_location", "user_birthday","user_likes", "user_status"));          return view;     }     protected void updatedetail() {           intent intent = new intent();         intent.setclass(getactivity(), mainactivity.class);          startactivity(intent);       }     @override     public void oncreate(bundle savedinstancestate) {         super.oncreate(savedinstancestate);         uihelper = new uilifecyclehelper(getactivity(), callback);         uihelper.oncreate(savedinstancestate);       }     @override     public void onresume() {         super.onresume();         session session = session.getactivesession();         if (session != null &&                session.isopened() || session.isclosed() ) {             onsessionstatechange(session, session.getstate(), null);         }         uihelper.onresume();     }      @override     public void onactivityresult(int requestcode, int resultcode, intent data) {         super.onactivityresult(requestcode, resultcode, data);         uihelper.onactivityresult(requestcode, resultcode, data);     }      @override     public void onpause() {         super.onpause();         uihelper.onpause();     }      @override     public void ondestroy() {         super.ondestroy();         uihelper.ondestroy();     }      @override     public void onsaveinstancestate(bundle outstate) {         super.onsaveinstancestate(outstate);         uihelper.onsaveinstancestate(outstate);     }     private void onsessionstatechange(session session, sessionstate state, exception exception) {         if (state.isopened()) {             updatedetail();             authbutton.setvisibility(view.invisible);             //b.setvisibility(view.visible);             log.i(tag, "logged in...");         } else if (state.isclosed()) {             log.i(tag, "logged out...");         }     }      private session.statuscallback callback = new session.statuscallback() {         @override         public void call(session session, sessionstate state, exception exception) {             onsessionstatechange(session, state, exception);         }     };  } 

i have used following code obtain key hash app while debugging app in log cat how obtain "key hash" signed app?

try {         packageinfo info = getpackagemanager().getpackageinfo(                 "your package name",                  packagemanager.get_signatures);         (signature signature : info.signatures) {             messagedigest md = messagedigest.getinstance("sha");             md.update(signature.tobytearray());             log.d("your tag", base64.encodetostring(md.digest(), base64.default));             }     } catch (namenotfoundexception e) {      } catch (nosuchalgorithmexception e) {      } 

the thing changing iz application signature, it's obvious there hash. facebook gives wrong method hash calculating on pages. today had problem - solution: generating hash key app using facebook sdk works ok me.