如何以编程方式从Facebook SDK 3.0注销而不使用Facebook登录/注销按钮？

Question

标题说明了一切.我正在使用自定义按钮来获取用户的Facebook信息(用于"注册"目的).然而,我不希望应用程序记住最后一个注册用户,也不想通过Facebook本机应用程序当前登录的用户.我希望每次都能弹出Facebook登录活动.这就是为什么我想以编程方式注销任何以前的用户.

我怎样才能做到这一点？这是我登录的方式:

private void signInWithFacebook() {

    SessionTracker sessionTracker = new SessionTracker(getBaseContext(), new StatusCallback() 
    {
        @Override
        public void call(Session session, SessionState state, Exception exception) { 
        }
    }, null, false);

    String applicationId = Utility.getMetadataApplicationId(getBaseContext());
    mCurrentSession = sessionTracker.getSession();

    if (mCurrentSession == null || mCurrentSession.getState().isClosed()) {
        sessionTracker.setSession(null);
        Session session = new Session.Builder(getBaseContext()).setApplicationId(applicationId).build();
        Session.setActiveSession(session);
        mCurrentSession = session;
    }

    if (!mCurrentSession.isOpened()) {
        Session.OpenRequest openRequest = null;
        openRequest = new Session.OpenRequest(RegisterActivity.this);

        if (openRequest != null) {
            openRequest.setPermissions(null);
            openRequest.setLoginBehavior(SessionLoginBehavior.SSO_WITH_FALLBACK);

            mCurrentSession.openForRead(openRequest);
        }
    }else {
        Request.executeMeRequestAsync(mCurrentSession, new Request.GraphUserCallback() {
              @Override
              public void onCompleted(GraphUser user, Response response) {
                  fillProfileWithFacebook( user );
              }
            });
    }
}

理想情况下,我会在此方法的开头调用以注销任何以前的用户.

Answer 1

最新SDK的更新:

现在@ zeuter的答案对于Facebook SDK v4.7 +是正确的:

LoginManager.getInstance().logOut();

原始答案:

请不要使用SessionTracker.它是一个内部(包私有)类,并不打算作为公共API的一部分使用.因此,其API可能随时更改,无任何向后兼容性保证.您应该能够在代码中删除SessionTracker的所有实例,而只需使用活动会话.

要回答您的问题,如果您不想保留任何会话数据,只需在应用关闭时调用closeAndClearTokenInformation即可.

Answer 2

此方法将帮助您在android中以编程方式从facebook注销

/**
 * Logout From Facebook 
 */
public static 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

    }

}

Answer 3

自Facebook的Android SDK v4.0(请参阅changelog)以来,您需要执行以下操作:

LoginManager.getInstance().logOut();

Answer 4

这是允许我从facebook以编程方式注销的片段.如果您发现我可能需要改进的任何内容,请告诉我.

private void logout(){
    // clear any user information
    mApp.clearUserPrefs();
    // find the active session which can only be facebook in my app
    Session session = Session.getActiveSession();
    // run the closeAndClearTokenInformation which does the following
    // DOCS : Closes the local in-memory Session object and clears any persistent 
    // cache related to the Session.
    session.closeAndClearTokenInformation();
    // return the user to the login screen
    startActivity(new Intent(getApplicationContext(), LoginActivity.class));
    // make sure the user can not access the page after he/she is logged out
    // clear the activity stack
    finish();
}

Answer 5

自Facebook的Android SDK v4.0起,您需要执行以下操作:

LoginManager.getInstance().logOut();

这还不够.这会简单明确缓存的访问令牌和配置文件,以便AccessToken.getCurrentAccessToken()与Profile.getCurrentProfile()现在将成为空.

要完全注销,您需要撤消权限然后调用LoginManager.getInstance().logOut();.要撤消权限,请执行以下图API -

    GraphRequest delPermRequest = new GraphRequest(AccessToken.getCurrentAccessToken(), "/{user-id}/permissions/", null, HttpMethod.DELETE, new GraphRequest.Callback() {
        @Override
        public void onCompleted(GraphResponse graphResponse) {
            if(graphResponse!=null){
                FacebookRequestError error =graphResponse.getError();
                if(error!=null){
                    Log.e(TAG, error.toString());
                }else {
                    finish();
                }
            }
        }
    });
    Log.d(TAG,"Executing revoke permissions with graph path" + delPermRequest.getGraphPath());
    delPermRequest.executeAsync();

Answer 6

SDK 4.0上已删除会话类.登录magement通过类LoginManager完成.所以:

mLoginManager = LoginManager.getInstance();
mLoginManager.logOut();

作为参考升级到SDK 4.0说:

会话已删除 - AccessToken,LoginManager和CallbackManager类取代并替换Session类中的功能.