android – Facebook登录 – 注销问题无效密钥哈希错误,同时尝试再次登录

我有一个简单的Facebook登录注销活动,该活动正在成功运行.

但是,在我从应用程序注销后,我尝试再次登录,但facebook提供了无效的密钥哈希错误.

请注意,我第一次成功登录并注销,但在我退出并尝试再次登录后,Facebook会出现该错误.应该做什么？

谢谢你的关注.

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,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,Exception exception) {
        onSessionStateChange(session,state,exception);
    }
};

}

解决方法

假设您已经将keyhash添加到您的Facebook应用程序中.

请确保在设置 – > Android系统.在“类名”字段中,您的第一个活动是所有包.例：com.yourcompany.yourapp.MyFirstActivity