如何在我的情况下更新菜单项？

Question

基本上，当您单击注册菜单项时，会弹出一个警告对话框，单击注册后，将发送请求并重新创建活动（这是最好的方法，我可以在关闭警报对话框后刷新活动而不重新创建它？）。我有一个布尔值，我放入共享首选项，并据此，菜单项应更新，但它保持不变。我必须退出活动，下次我回到它，然后它会更新。但是，当我注销时，菜单会自动更新。我究竟做错了什么？

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    mPreferenceAdapter = new PreferenceAdapter(this);
    loginNo = mPreferenceAdapter.getLoginNo();
    mPrefs = getSharedPreferences("mySharedPrefs", Context.MODE_PRIVATE);
    isLoggedIn = mPrefs.getBoolean("isLoggedIn", false);

    i = getIntent();
    bundle = i.getBundleExtra("products");
    parcelableProducts = bundle.getParcelable("parcelProducts");
    parcelableShop = bundle.getParcelable("parcelShop");
    bundle.putParcelable("parcelProductsFragment", parcelableProducts);
    bundle.putParcelable("parcelProductsFragmentShop", parcelableShop);

    shop = Parcels.unwrap(parcelableShop);
    Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
    setSupportActionBar(toolbar);

    viewPager = (ViewPager) findViewById(R.id.viewpager);
    setUpViewPager(viewPager);
    tabLayout = (TabLayout) findViewById(R.id.tabs);
    tabLayout.setupWithViewPager(viewPager);
}

@Override
public boolean onCreateOptionsMenu(Menu menu) {
    MenuInflater inflater = getMenuInflater();
    inflater.inflate(R.menu.menu, menu);
    menuItemRegister = menu.findItem(R.id.menu_item_register);

    if (loginNo == 0) {
        menuItemRegister.setVisible(true);
    } else {
        changeLoginItem(isLoggedIn);
    }
    return true;
}

@Override
public boolean onOptionsItemSelected(MenuItem item) {
    switch (item.getItemId()) {
        case R.id.menu_item_peems:
            i = new Intent(this, PeemActivity.class);
            i.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_CLEAR_TOP);
            startActivity(i);
            finish();
            return true;
        case R.id.menu_item_shops:
            return true;
        case R.id.menu_item_cart:
            i = new Intent(this, CheckoutActivity.class);
            startActivity(i);
            return true;
        case R.id.menu_item_login:
            //loginDialog();
            return true;
        case R.id.menu_item_register:
            if (isLoggedIn) {
                logout();
            } else {
                registerDialog();
            }

            return true;
    }
    return super.onOptionsItemSelected(item);
}

public void changeLoginItem(boolean isLoggedIn) {
    String logOut = getResources().getString(R.string.btnLogout);
    String logIn = getResources().getString(R.string.btnRegister);
    this.isLoggedIn = isLoggedIn;
    menuItemRegister.setTitle(isLoggedIn ? logOut : logIn);
}

private void registerDialog() {
    AlertDialog.Builder builder = new AlertDialog.Builder(this);
    LayoutInflater inflater = this.getLayoutInflater();
    View dialogView = inflater.inflate(R.layout.register_dialog, null);
    Button btnRegister = (Button) dialogView.findViewById(R.id.btnRegister);
    etFirstName = (EditText) dialogView.findViewById(R.id.etFirstName);
    etLastName = (EditText) dialogView.findViewById(R.id.etLastName);
    etEmail = (EditText) dialogView.findViewById(R.id.etEmail);
    etPassword = (EditText) dialogView.findViewById(R.id.etPassword);
    builder.setView(dialogView);
    final AlertDialog dialog = builder.show();
    dialog.getWindow().setSoftInputMode(WindowManager.LayoutParams.SOFT_INPUT_ADJUST_RESIZE);

    btnRegister.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            registerInShop();
            dialog.dismiss();
            finish();
            startActivity(getIntent());
            invalidateOptionsMenu();
        }
    });
}

private void logout() {
    AlertDialog.Builder builder = new AlertDialog.Builder(this);
    builder.setMessage("Are you sure you want to logout?");
    builder.setPositiveButton("YES", new DialogInterface.OnClickListener() {
        @Override
        public void onClick(DialogInterface dialog, int which) {
            mPrefs = getSharedPreferences("mySharedPrefs", Context.MODE_PRIVATE);
            mEditor = mPrefs.edit();
            mEditor.putBoolean("isLoggedIn", false);
            mEditor.apply();
            mPreferenceAdapter.removeLoginNo();
            changeLoginItem(false);
            finish();
            startActivity(getIntent());
        }
    });
    builder.setNegativeButton("NO", null);
    AlertDialog dialog = builder.create();
    dialog.show();
}

private void registerInShop() {
    JSONObject shopInfoJSON = new JSONObject();
    try {
        shopInfoJSON.put("ShopNumber", String.valueOf(shop.getShopNo()));
        shopInfoJSON.put("Server", String.valueOf(shop.getServer()));
        shopInfoJSON.put("Db", String.valueOf(shop.getDb()));
        shopInfoJSON.put("DbUser", String.valueOf(shop.getDbUser()));
        shopInfoJSON.put("DbPass", String.valueOf(shop.getDbPass()));
    } catch (JSONException e) {
        e.printStackTrace();
    }

    JSONObject userInfoJSON = new JSONObject();
    try {
        userInfoJSON.put("FirstName", etFirstName.getText().toString());
        userInfoJSON.put("LastName", etLastName.getText().toString());
        userInfoJSON.put("Email", etEmail.getText().toString());
        userInfoJSON.put("Password", etPassword.getText().toString());
        userInfoJSON.put("Honorific", "Monsieur");
        userInfoJSON.put("Company", "Company 1");
        userInfoJSON.put("Company2", "company 2");
        userInfoJSON.put("Address", "address");
        userInfoJSON.put("Address2", "address2");
        userInfoJSON.put("PostalCode", "1000");
        userInfoJSON.put("City", "SomeCity");
        userInfoJSON.put("Country", "SomeCountry");
        userInfoJSON.put("Tel", "123123");
        userInfoJSON.put("Mobile", "569852");
        userInfoJSON.put("DOB", "1985-05-20");

    } catch (JSONException e) {
        e.getMessage();
    }

    JSONObject rootJSON = new JSONObject();
    try {
        rootJSON.put("ShopInfo", shopInfoJSON);
        rootJSON.put("UserInfo", userInfoJSON);
    } catch (JSONException e) {
        e.printStackTrace();
    }

    JsonObjectRequest registerInShopRequest = new JsonObjectRequest(Request.Method.POST, API.REGISTER_IN_SHOP, rootJSON, new Response.Listener<JSONObject>() {
        @Override
        public void onResponse(JSONObject response) {
            Log.d(TAG, "Response Register: " + response);
            int loginNo = 0;
            try {
                loginNo = response.getInt("LoginNo");
            } catch (JSONException e) {
                e.printStackTrace();
            }
            mPreferenceAdapter.saveLoginNo(loginNo);
            mPrefs = getSharedPreferences("mySharedPrefs", Context.MODE_PRIVATE);
            mEditor = mPrefs.edit();
            mEditor.putBoolean("isLoggedIn", true);
            mEditor.apply();
        }
    }, new Response.ErrorListener() {
        @Override
        public void onErrorResponse(VolleyError error) {
            Log.d(TAG, "Response Error Register: " + error);
            error.printStackTrace();
        }
    }) {
        @Override
        public Map<String, String> getHeaders() {
            Map<String, String> headers = new HashMap<>();
            headers.put(KEY_CONTENT_TYPE, "application/json; charset=utf-8");
            headers.put(KEY_X_PROVIDER, "some");
            headers.put(KEY_AUTHORIZATION, "");
            return headers;
        }
    };
    ApplicationController.getInstance().addToRequestQueue(registerInShopRequest);
}

private void setUpViewPager(ViewPager viewPager) {
    ViewPagerAdapter adapter = new ViewPagerAdapter(getSupportFragmentManager());
    adapter.addFragment(WishlistFragment.newInstance(), "Wishlist");
    adapter.addFragment(HistoryFragment.newInstance(), "History");
    adapter.addFragment(OffersFragment.newInstance(bundle), "Offers");
    adapter.addFragment(ProductsFragment.newInstance(bundle), "Products");
    viewPager.setAdapter(adapter);
}

class ViewPagerAdapter extends FragmentPagerAdapter {
    private final List<Fragment> mFragmentList = new ArrayList<>();
    private final List<String> mFragmentTitleList = new ArrayList<>();

    ViewPagerAdapter(FragmentManager manager) {
        super(manager);
    }

    @Override
    public Fragment getItem(int position) {
        return mFragmentList.get(position);
    }

    @Override
    public int getCount() {
        return mFragmentList.size();
    }

    void addFragment(Fragment fragment, String title) {
        mFragmentList.add(fragment);
        mFragmentTitleList.add(title);
    }

    @Override
    public CharSequence getPageTitle(int position) {
        return mFragmentTitleList.get(position);
    }
}