我有一个简单的 Facebook 登录/注销活动,运行成功。
然而,在我从应用程序注销后,我尝试再次登录,但 facebook 给出了无效的密钥哈希错误。
请注意,我第一次登录并注销成功,但在我注销并尝试再次登录后,Facebook 给出了该错误。应该做什么?
感谢您的关注。
这是我的代码:
public class MainFragment extends Fragment {
private static final String TAG = MainFragment.class.getSimpleName();
private UiLifecycleHelper uiHelper;
private final List<String> permissions;
public MainFragment() {
permissions = Arrays.asList("user_status");
}
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
uiHelper = new UiLifecycleHelper(getActivity(), callback);
uiHelper.onCreate(savedInstanceState);
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.activity_main, container, false);
LoginButton authButton = (LoginButton) view.findViewById(R.id.authButton);
authButton.setFragment(this);
authButton.setReadPermissions(permissions);
return view;
}
@Override
public void onResume() {
super.onResume();
// For scenarios where the main activity is launched and user
// session is not null, the session state change notification
// may not be triggered. Trigger it if it's open/closed.
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()) {
Log.i(TAG, "Logged in...");
} else if (state.isClosed()) {
if (Session.getActiveSession() != null) {
Session.getActiveSession().closeAndClearTokenInformation();
}
Session.setActiveSession(null);
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);
}
};
}