Android-如何隐藏当前片段的菜单选项

我有一个带有FrameLayout和菜单的ActionBar活动。当用户单击菜单项时，我用相关的新片段替换了片段。但是，我看不到明显的方法来删除所选片段的菜单项。

public class MainActivity extends ActionBarActivity {
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        if (savedInstanceState == null) {
            StudyFragment startFragment = new StudyFragment();
            startFragment.setArguments(getIntent().getExtras());
            getSupportFragmentManager().beginTransaction().add
                                      (R.id.container, startFragment).commit();
        }
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        getMenuInflater().inflate(R.menu.main, menu);
        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        int id = item.getItemId();

        switch (id) {
        case R.id.action_study:
            replaceFragment((Fragment)new StudyFragment());
            break;
        case R.id.action_list: 
            replaceFragment((Fragment)new ListFragment());
            break;
        // etc
        }
        return super.onOptionsItemSelected(item);
    }

    private void replaceFragment(Fragment f) {
        FragmentTransaction transaction =
                                getSupportFragmentManager().beginTransaction();
        transaction.replace(R.id.container, f);
        transaction.addToBackStack(null);

        transaction.commit();
      }

Google关于更改菜单的文档说禁用onPrepareOptionsMenu中的菜单-但是我怎么知道已选择了哪个项目？

-实施解决方案-

使用下面的Muhammed Refaat解决方案，我向班级添加了两个新成员：

private Menu activityMenu;
private MenuItem curMenuItem;

在onCreateOptionsMenu中设置它们

activityMenu = menu;
curMenuItem = activityMenu.findItem(R.id.action_study);
curMenuItem.setVisible(false);

并在onOptionsItemSelected上更改了它们

curMenuItem.setVisible(true);
curMenuItem = activityMenu.findItem(id);
curMenuItem.setVisible(false);