java – 在android中处理facebook sdk的登录会话

目前我使用最新的sdk来实现facebook登录,但是,它与官方的实际行为略有不同

官方行为：用户点击登录按钮,权限对话框提示,如果我点击取消,它将关闭该框,只有当我点击确认时才会登录

我的应用行为：用户单击登录按钮,如果我单击取消,但如果我再次单击登录按钮,它将不会显示任何权限对话框,并将登录

我从官方样本中复制了代码,所以我很困惑为什么它在我的应用程序中表现不同.怎么解决？谢谢

Facebook示例(我使用官方代码构建我的登录按钮)

public class SessionLoginFragment extends Fragment {
    private static final String URL_PREFIX_FRIENDS = "https://graph.facebook.com/me/friends?access_token=";

    private TextView textInstructionsOrLink;
    private Button buttonLoginLogout;
    private Session.StatusCallback statusCallback = new SessionStatusCallback();

    @Override
    public View onCreateView(LayoutInflater inflater,ViewGroup container,Bundle savedInstanceState) {
        View view = inflater.inflate(R.layout.fragment,container,false);

        buttonLoginLogout = (Button) view.findViewById(R.id.buttonLoginLogout);
        textInstructionsOrLink = (TextView) view.findViewById(R.id.instructionsOrLink);

        Settings.addLoggingBehavior(LoggingBehavior.INCLUDE_ACCESS_TOKENS);

        Session session = Session.getActiveSession();
        if (session == null) {
            if (savedInstanceState != null) {
                session = Session.restoreSession(getActivity(),null,statusCallback,savedInstanceState);
            }
            if (session == null) {
                session = new Session(getActivity());
            }
            Session.setActiveSession(session);
            if (session.getState().equals(SessionState.CREATED_TOKEN_LOADED)) {
                session.openForRead(new Session.OpenRequest(this).setCallback(statusCallback));
            }
        }

        updateView();

        return view;
    }

    @Override
    public void onStart() {
        super.onStart();
        Session.getActiveSession().addCallback(statusCallback);
    }

    @Override
    public void onStop() {
        super.onStop();
        Session.getActiveSession().removeCallback(statusCallback);
    }

    @Override
    public void onActivityResult(int requestCode,int resultCode,Intent data) {
        super.onActivityResult(requestCode,resultCode,data);
        Session.getActiveSession().onActivityResult(getActivity(),requestCode,data);
    }

    @Override
    public void onSaveInstanceState(Bundle outState) {
        super.onSaveInstanceState(outState);
        Session session = Session.getActiveSession();
        Session.saveSession(session,outState);
    }

    private void updateView() {
        Session session = Session.getActiveSession();
        if (session.isOpened()) {
            textInstructionsOrLink.setText(URL_PREFIX_FRIENDS + session.getAccessToken());
            buttonLoginLogout.setText(R.string.logout);
            buttonLoginLogout.setOnClickListener(new View.OnClickListener() {
                public void onClick(View view) { onClickLogout(); }
            });
        } else {
            textInstructionsOrLink.setText(R.string.instructions);
            buttonLoginLogout.setText(R.string.login);
            buttonLoginLogout.setOnClickListener(new View.OnClickListener() {
                public void onClick(View view) { onClickLogin(); }
            });
        }
    }

    private void onClickLogin() {
        Session session = Session.getActiveSession();
        if (!session.isOpened() && !session.isClosed()) {
            session.openForRead(new Session.OpenRequest(this).setCallback(statusCallback));
        } else {
            Session.openActiveSession(getActivity(),this,true,statusCallback);
        }
    }

    private void onClickLogout() {
        Session session = Session.getActiveSession();
        if (!session.isClosed()) {
            session.closeAndClearTokenInformation();
        }
    }

    private class SessionStatusCallback implements Session.StatusCallback {
        @Override
        public void call(Session session,SessionState state,Exception exception) {
            updateView();
        }
    }
}

我的应用程序(我使用了与官方名称相同的方法名称,我没有为facebook登录添加其他代码)

public class Home extends Fragment implements LoginListener {
    private final static String TAG = "Home";
    public View rootView;
    public ImageView HomeBg;
    public ImageView buttonLoginLogout;
    public TextView chi;
    public TextView eng;
    public ColorStateList oldColor;
    public SharedPreferences prefs;
    public EasyTracker tracker = null;
    public SharedPreferences.Editor editor;
    public ArrayList<String> permission;
    public ProgressDialog pd;
    public Home ctx;

    //Facebook login
    private Session.StatusCallback statusCallback = new SessionStatusCallback();

    @Override
    public void onCreate(Bundle savedInstanceState) {
        // TODO Auto-generated method stub
        super.onCreate(savedInstanceState); 
        ctx = this;
    }

    @Override
    public View onCreateView(LayoutInflater inflater,Bundle savedInstanceState) {

        try{
            // fix for disable the hiding action bar animation
            getActivity().getActionBar().getClass().getDeclaredMethod("setShowHideAnimationEnabled",boolean.class).invoke(getActivity().getActionBar(),false);
        } catch (Exception exception){
            // animation will be run if not support
        }

        getActivity().getActionBar().hide();

        tracker = EasyTracker.getInstance(getActivity());

        if (permission == null) {
            permission = new ArrayList<String>();
            permission.add("email");
        }

        prefs = getActivity().getSharedPreferences("userInfo",0);
        editor = prefs.edit();

        rootView = inflater.inflate(R.layout.home,false);
        buttonLoginLogout = (ImageView) rootView.findViewById(R.id.home_connectFB);
        eng = (TextView) rootView.findViewById(R.id.btn_eng);
        chi = (TextView) rootView.findViewById(R.id.btn_chi);

        eng.setOnClickListener(new OnClickListener(){
            @Override
            public void onClick(View arg0) {
                if (!Utility.getLocale(getActivity()).equals("en")) {
                    tracker.send(MapBuilder.createEvent("menu_click","language","switchEN",null).build());
                    chi.setTextColor(oldColor);
                    eng.setTextColor(getActivity().getResources().getColor(android.R.color.white));
                    MyApp.updateLanguage(getActivity().getApplicationContext(),"en");
                    refreshAfterLocaleChanged("en");
                }
            }
        });

        chi.setOnClickListener(new OnClickListener(){
            @Override
            public void onClick(View arg0) {
                if (!Utility.getLocale(getActivity()).equals("zh")) {
                    tracker.send(MapBuilder.createEvent("menu_click","switchTC",null).build());
                    eng.setTextColor(oldColor);
                    chi.setTextColor(getActivity().getResources().getColor(android.R.color.white));
                    MyApp.updateLanguage(getActivity().getApplicationContext(),"zh");
                    refreshAfterLocaleChanged("zh");
                }
            }
        });

        if (Utility.getLocale(getActivity()).equals("zh")) {
            chi.setTextColor(getActivity().getResources().getColor(
                    android.R.color.white));
            oldColor = eng.getTextColors();
        } else {
            eng.setTextColor(getActivity().getResources().getColor(
                    android.R.color.white));
            oldColor = chi.getTextColors();

        }

        //Facebook login
        Settings.addLoggingBehavior(LoggingBehavior.INCLUDE_ACCESS_TOKENS);

        Session session = Session.getActiveSession();
        if (session == null) {
            if (savedInstanceState != null) {
                session = Session.restoreSession(getActivity(),savedInstanceState);
            }
            if (session == null) {
                session = new Session(getActivity());
            }
            Session.setActiveSession(session);
            if (session.getState().equals(SessionState.CREATED_TOKEN_LOADED)) {
                session.openForRead(new Session.OpenRequest(this).setCallback(statusCallback));
            }
        }

       updateView();

       return rootView;
    }

    public void refreshAfterLocaleChanged(String lang){
        SharedPreferences langPrefs = PreferenceManager.getDefaultSharedPreferences(getActivity().getApplicationContext());
        Editor editor = langPrefs.edit();
        editor.putString("lang",lang).commit();

        Intent intent = getActivity().getIntent();
        intent.addFlags(Intent.FLAG_ACTIVITY_NO_ANIMATION);
        getActivity().finish();
        getActivity().overridePendingTransition(0,0);
        startActivity(intent);
    }

    @Override
    public void onStart() {
        super.onStart();
        Session.getActiveSession().addCallback(statusCallback);
        tracker.set(Fields.SCREEN_NAME,"hk7app/CX/" + Utility.getLocale(getActivity()) + "/Landing Page");
        tracker.send(MapBuilder.createAppView().build());
    }

    @Override
    public void onStop() {
        super.onStop();

        if (pd != null)
            pd.dismiss();

        Session.getActiveSession().removeCallback(statusCallback);
        EasyTracker.getInstance(getActivity()).activityStop(getActivity());
    }

    @SuppressWarnings("deprecation")
    private void updateView() {
        Session session = Session.getActiveSession();
        if (session.isOpened()) {
             final String token = session.getAccessToken();
             Request.executeMeRequestAsync(session,new Request.GraphUserCallback() {
                    @Override
                    public void onCompleted(GraphUser user,Response response) {
                        // TODO Auto-generated method stub
                        if (user != null) {
                            if (!user.getId().equals(prefs.getString("fbId",""))) {
                                editor.putString("fbId",user.getId());
                                editor.putString("fName",user.getFirstName());
                                editor.putString("lName",user.getLastName());
                                editor.putString("email",user.asMap().get("email").toString());
                                editor.commit();
                            }
                            if (prefs.getString("memId","").equals("") || prefs.getString("token","").equals("") || !user.getId().equals(prefs.getString("fbId",""))){
                                pd = ProgressDialog.show(getActivity(),getActivity().getResources().getString(R.string.sys_info),getActivity().getResources().getString(R.string.loading));
                                new APIHandler(getActivity(),tracker,"login",pd).execute(ctx,token);
                            } else {
                                onLoginComplete("","");
                            }
                        }
                    }
             });                  
        } else {
            buttonLoginLogout.setImageResource(R.drawable.landing_btn_connect_facebook);
            buttonLoginLogout.setOnClickListener(new View.OnClickListener() {
                public void onClick(View view) { onClickLogin(); }
            });
        }
    }

    @Override
    public void onActivityResult(int requestCode,outState);
    }

    private void onClickLogin() {
        tracker.send(MapBuilder.createEvent("menu_click","Fbconnect","connectFB_" + Utility.getLocale(getActivity()),null).build());
        Session session = Session.getActiveSession();
        if (!session.isOpened() && !session.isClosed()) {
            session.openForRead(new Session.OpenRequest(this).setCallback(statusCallback));
        } else {
            Session.openActiveSession(getActivity(),statusCallback);
        }
    }

    private class SessionStatusCallback implements Session.StatusCallback {
        @Override
        public void call(Session session,Exception exception) {
            Log.d(TAG,"SessionStatusCallback");
            if (exception != null) {
                Log.d(TAG,""+exception);

                if (!session.isClosed())
                    session.closeAndClearTokenInformation(); //reset session

                if (exception instanceof FacebookAuthorizationException){
                    new AlertDialog.Builder(getActivity())
                    .setTitle(ctx.getResources().getString(R.string.sys_info))
                    .setMessage(R.string.facebook_permission_missing)
                    .setPositiveButton(ctx.getResources().getString(R.string.close),null)
                    .show();
                }
            } else {
                updateView();
            }
        }
    }

    @Override
    public void onResume() {
        super.onResume();
        AppEventsLogger.activateApp(getActivity(),getResources().getString(R.string.app_id));
    }

    @Override
    public void onLoginComplete(String memberId,String token) {    
        if (pd != null)
            pd.dismiss();

        if (!memberId.equals("") && !token.equals("")) {
            editor.putString("memId",memberId);
            editor.putString("token",token);
            editor.commit();
        }

        buttonLoginLogout.setImageResource(R.drawable.landing_btn_take_a_selfie);
        buttonLoginLogout.setOnClickListener(new View.OnClickListener() {
            public void onClick(View view) {
                 tracker.send(MapBuilder.createEvent("menu_click","TakeSelfie","Selfie_now_" + Utility.getLocale(getActivity()),null).build());
                ((LandingPage)getActivity()).tabHost.setCurrentTab(2);
            }
        });
    }

    @Override
    public void onLoginFailure(String errorMsg) {
        if (pd != null)
            pd.dismiss();

        Toast.makeText(getActivity(),errorMsg,Toast.LENGTH_LONG).show();
    }

}

public class FbActivity extends FragmentActivity {

private static final String PERMISSION = "publish_actions";


private final String PENDING_ACTION_BUNDLE_KEY = "com.facebook.samples.hellofacebook:PendingAction";

private LoginButton loginButton;
private ProfilePictureView profilePictureView;
private TextView greeting;
private PendingAction pendingAction = PendingAction.NONE;
private ViewGroup controlsContainer;
private GraphUser user;
private GraphPlace place;
private List<GraphUser> tags;
private boolean canPresentShareDialog;


private UiLifecycleHelper uiHelper;

private Session.StatusCallback callback = new Session.StatusCallback() {
    @Override
    public void call(Session session,Exception exception) {
        onSessionStateChange(session,state,exception);
    }
};

private FacebookDialog.Callback dialogCallback = new FacebookDialog.Callback() {
    @Override
    public void onError(FacebookDialog.PendingCall pendingCall,Exception error,Bundle data) {
        Log.d("HelloFacebook",String.format("Error: %s",error.toString()));
    }

    @Override
    public void onComplete(FacebookDialog.PendingCall pendingCall,"Success!");
    }
};

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    uiHelper = new UiLifecycleHelper(this,callback);
    uiHelper.onCreate(savedInstanceState);
    if (savedInstanceState != null) {
        String name = savedInstanceState
                .getString(PENDING_ACTION_BUNDLE_KEY);
        pendingAction = PendingAction.valueOf(name);
    }

    setContentView(R.layout.activity_fb);


    loginButton = (LoginButton) findViewById(R.id.login_button);
    loginButton
            .setUserInfoChangedCallback(new LoginButton.UserInfoChangedCallback() {
                @Override
                public void onUserInfoFetched(GraphUser user) {
                    FbActivity.this.user = user;

                    onClickPostPhoto();

                    updateUI();
                    // It's possible that we were waiting for this.user to
                    // be populated in order to post a
                    // status update.
                    handlePendingAction();
                }
            });

    profilePictureView = (ProfilePictureView) findViewById(R.id.profilePicture);
    greeting = (TextView) findViewById(R.id.greeting);

    controlsContainer = (ViewGroup) findViewById(R.id.main_ui_container);

    final FragmentManager fm = getSupportFragmentManager();
    Fragment fragment = fm.findFragmentById(R.id.fragment_container);
    if (fragment != null) {
        // If we're being re-created and have a fragment,we need to a) hide
        // the main UI controls and
        // b) hook up its listeners again.
        controlsContainer.setVisibility(View.GONE);

    }

    // Listen for changes in the back stack so we know if a fragment got
    // popped off because the user
    // clicked the back button.
    fm.addOnBackStackChangedListener(new FragmentManager.OnBackStackChangedListener() {
        @Override
        public void onBackStackChanged() {
            if (fm.getBackStackEntryCount() == 0) {
                // We need to re-show our UI.
                controlsContainer.setVisibility(View.VISIBLE);
            }
        }
    });

    canPresentShareDialog = FacebookDialog.canPresentShareDialog(this,FacebookDialog.ShareDialogFeature.SHARE_DIALOG);
}

@Override
protected void onResume() {
    super.onResume();
    uiHelper.onResume();

    // Call the 'activateApp' method to log an app event for use in
    // analytics and advertising reporting. Do so in
    // the onResume methods of the primary Activities that an app may be
    // launched into.
    AppEventsLogger.activateApp(this);

    updateUI();
}

@Override
protected void onSaveInstanceState(Bundle outState) {
    super.onSaveInstanceState(outState);
    uiHelper.onSaveInstanceState(outState);

    outState.putString(PENDING_ACTION_BUNDLE_KEY,pendingAction.name());
}

@Override
protected void onActivityResult(int requestCode,Intent data) {
    super.onActivityResult(requestCode,data);
    uiHelper.onActivityResult(requestCode,data,dialogCallback);
}

@Override
public void onPause() {
    super.onPause();
    uiHelper.onPause();
}

@Override
public void onDestroy() {
    super.onDestroy();
    uiHelper.onDestroy();
}

private void onSessionStateChange(Session session,Exception exception) {
    if (pendingAction != PendingAction.NONE
            && (exception instanceof FacebookOperationCanceledException || exception instanceof FacebookAuthorizationException)) {
        new AlertDialog.Builder(FbActivity.this)
                .setTitle(R.string.cancelled)
                .setMessage(R.string.permission_not_granted)
                .setPositiveButton(R.string.ok,null).show();
        pendingAction = PendingAction.NONE;
    } else if (state == SessionState.OPENED_TOKEN_UPDATED) {
        handlePendingAction();
    }
    updateUI();
}

private void updateUI() {
    Session session = Session.getActiveSession();
    boolean enableButtons = (session != null && session.isOpened());

    if (enableButtons && user != null) {
        profilePictureView.setProfileId(user.getId());
        greeting.setText(user.getFirstName());

    } else {
        profilePictureView.setProfileId(null);
        greeting.setText(null);
    }
}

@SuppressWarnings("incomplete-switch")
private void handlePendingAction() {
    PendingAction previouslyPendingAction = pendingAction;
    // These actions may re-set pendingAction if they are still pending,but
    // we assume they
    // will succeed.
    pendingAction = PendingAction.NONE;
    // pendingAction = PendingAction.POST_PHOTO;

}

private interface GraphObjectWithId extends GraphObject {
    String getId();
}
}