Question

我尝试在成功退出Facebook时添加回调方法，因为onSuccess方法似乎只在登录时被调用。我在此处的其他地方获得了以下代码块：

private AccessTokenTracker fbTracker;
...
fbTracker = new AccessTokenTracker() {
            @Override
            protected void onCurrentAccessTokenChanged(AccessToken accessToken, AccessToken accessToken2) {
                if (accessToken2 == null) {


                    Log.d(TAG, "User Logged Out.");

                    mEditor.putBoolean(PREF_KEY_FACEBOOK_LOGIN, false);
                    mEditor.commit();
                    Log.d(TAG, "fbLoginButton success");

                    String msg = "Facebook successfully logged out";
                    Toast.makeText(getApplicationContext(), msg, Toast.LENGTH_LONG).show();

                    customFbLoginButton.setVisibility(View.VISIBLE);
                    customFbLogoutButton.setVisibility(View.GONE);
                }
            }
        };

在logcat中我看到：

D/LoginActivity: User Logged Out.
D/LoginActivity: fbLoginButton success
D/LoginActivity: User Logged Out.
D/LoginActivity: fbLoginButton success
D/LoginActivity: User Logged Out.
D/LoginActivity: fbLoginButton success
D/LoginActivity: User Logged Out.
D/LoginActivity: fbLoginButton success
D/LoginActivity: User Logged Out.
D/LoginActivity: fbLoginButton success
D/LoginActivity: User Logged Out.
D/LoginActivity: fbLoginButton success

在这种情况下，我认为它没有造成任何伤害，但我想尝试解决它，如果可以的话。这种行为是否可以避免？

Answer 1

在您的生命周期中，您必须禁用并启用此对象fbTracker。例如，当您的活动暂停等时，可以调用此方法stopTracking（）... 您可以随时重新启动它。

从Facebook注销期间多次调用onCurrentAccessTokenChanged

1 个答案: