1 <com.facebook.widget.LoginButton2             android:id="@+id/authButton"3             android:layout_width="fill_parent"4             android:layout_height="wrap_content"5             android:layout_gravity="center_horizontal"6             android:layout_marginLeft="45dp"7             android:layout_marginRight="45dp"8             android:layout_marginTop="10dp"9             android:background="#FF3B5790" />

private UiLifecycleHelper uiHelper;private LoginButton authButton; @Override    public void onCreate(Bundle savedInstanceState)    {        super.onCreate(savedInstanceState);        uiHelper = new UiLifecycleHelper(getActivity(), callback);        uiHelper.onCreate(savedInstanceState);  　　　authButton = (LoginButton) view.findViewById(R.id.authButton);        authButton.setFragment(this);        authButton.setLoginBehavior(SessionLoginBehavior.SUPPRESS_SSO);        authButton.setReadPermissions(Arrays.asList("email", "user_likes", "user_status"));    } @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 Session.StatusCallback callback = new Session.StatusCallback()    {        @Override        public void call(Session session, SessionState state, Exception exception)        {            onSessionStateChange(session, state, exception);        }    }; private void onSessionStateChange(Session session, SessionState state, Exception exception)    {        if (state.isOpened())        {            loginByFacebookFinished(session);        }        else if (state.isClosed())        {        }    }/**
*登陆成功
**/ private void loginByFacebookFinished(final Session session)    {        Request request = Request.newMeRequest(session, new GraphUserCallback()        {            @Override            public void onCompleted(GraphUser user, Response response)            {                dismissLoadingDlg();                try                {                    AccountInfo accountInfo = null;                    accountInfo = new AccountInfo();                    accountInfo.setVip(false);                    accountInfo.setHasLogin(true);                    accountInfo.setToken(session.getAccessToken());                    //用户信息                    if (user != null)                    {                        accountInfo.setShowUserName(user.getName());                        accountInfo.setPassword(user.getLink());                        accountInfo.setLoginType(LoginType.FACEBOOK);                        accountInfo.setEmail(user.getProperty("email") + "");                        accountInfo.setLoginName(user.getProperty("name") + "");                    }                }                catch (Exception e)                {                    // TODO Auto-generated catch block                    e.printStackTrace();                }            }        });        request.executeAsync();    }

 /**     * Logout From Facebook      */    public  void callFacebookLogout(Context context) {        Session session = Session.getActiveSession();        if (session != null) {                        if (!session.isClosed()) {                session.closeAndClearTokenInformation();                //clear your preferences if saved            }        } else {                        session = new Session(context);            Session.setActiveSession(session);                        session.closeAndClearTokenInformation();            //clear your preferences if saved        }            }