即使在notifyDataSetChanged之后，抽屉中的旧标题仍会显示，只有在您单击标题后才会更新

Question

我是Android的新手，我的抽屉有问题。 我的导航抽屉里有几个选项。在我的主页中，抽屉内有一个默认的项目列表。当用户登录时，更改取决于用户的状态。

所以我的问题出在我抽屉里的默认项目列表中： 新闻 登录 约

当我登录例如普通员工时 它必须改为不同的列表 新闻 轮廓 应用 付款 关于 退出

依旧......

但是首先显示那些项目 新闻 登录 关于 付款 关于 退出

从以前的项目显示的登录和关于仍然显示即使i。删除它（）我甚至使用.clear（）当我调试它时，它删除并清除它但仍然输出显示以前的项目，但当我向下滚动它更改为我想要显示的内容时，也会在我点击其中一个项目时发生。

有人可以帮我解决吗？非常感谢你。

这是我的代码。

public class  MainActivity extends ActionBarActivity implements LoginFragment.StatusListener, View.OnClickListener,
    HomeEmployeeFragment.HomeStatusListener, HomeEmployerFragment.HomeStatusEmprListener {
private DrawerLayout mDrawerLayout;
private ListView mDrawerList;
private ActionBarDrawerToggle mDrawerToggle;

// nav drawer title
private CharSequence mDrawerTitle;

// used to store app title
private CharSequence mTitle;

// slide menu items
private String[] navMenuTitles;

private ArrayList<NavDrawerItem> navDrawerItems;
private NavDrawerListAdapter drawer_adapter;

String status;

SharedPreferences shared;
SharedPreferences.Editor edit;

final String TAG = "MainActivity";

public void onLogin(String stat){
    Log.d(TAG, "Status login: " + stat);
    edit.putString("Status", stat);
    edit.commit();
}

public void onHomeEmployee(String stat){
    Log.d(TAG, "Status HomEmp: " + stat);
    navDrawerItems.clear();
    updateDrawer();
    edit.putString("Status", stat);
    edit.commit();
}

public void onHomeEmployer(String stat){
    Log.d(TAG, "Status: " + stat);
    navDrawerItems.clear();
    updateDrawer();
    edit.putString("Status", stat);
    edit.commit();
}

@Override
protected void onResume() {
    super.onResume();
}

protected void onPause(){
    super.onPause();
}


@Override
protected void onStart() {
    super.onStart();
}

private void displayDrawer() {
    //start for drawer
    mTitle = mDrawerTitle = getTitle();

    // load slide menu items
    navMenuTitles = getResources().getStringArray(R.array.nav_drawer_items);
    mDrawerLayout = (DrawerLayout) findViewById(R.id.drawer_layout);
    mDrawerList = (ListView) findViewById(R.id.list_slidermenu);

    navDrawerItems = new ArrayList<NavDrawerItem>();
    navDrawerItems.clear();
    updateDrawer();

    // setting the nav drawer list adapter
    drawer_adapter = new NavDrawerListAdapter(getApplicationContext(), navDrawerItems);
    mDrawerList.setAdapter(drawer_adapter);
    drawer_adapter.notifyDataSetChanged();

    //replace getActionBar with getSupportActionBar
    getSupportActionBar().setDisplayHomeAsUpEnabled(true);
    getSupportActionBar().setHomeButtonEnabled(true);

    mDrawerToggle = new ActionBarDrawerToggle(this, mDrawerLayout,
            R.string.app_name, // nav drawer open - description for accessibility
            R.string.app_name // nav drawer close - description for accessibility
    ){
        public void onDrawerClosed(View view) {
            getSupportActionBar().setTitle(mTitle);
            invalidateOptionsMenu();
        }

        public void onDrawerOpened(View drawerView) {
            getSupportActionBar().setTitle(mDrawerTitle);
            invalidateOptionsMenu();
        }
    };
    mDrawerLayout.setDrawerListener(mDrawerToggle);
    mDrawerList.setOnItemClickListener(new SlideMenuClickListener());
}

private void updateDrawer(){
    navDrawerItems.clear();
    status = shared.getString("Status", "");

    if(status != null) {
        if(status.equals("employee")) {
            Log.d(TAG, "employee drawer");
            navDrawerItems.clear();

            navDrawerItems.remove(new NavDrawerItem(navMenuTitles[1])); // login
            navDrawerItems.remove(new NavDrawerItem(navMenuTitles[2])); // about


            //News
            navDrawerItems.add(new NavDrawerItem(navMenuTitles[0]));
            //Profile
            navDrawerItems.add(new NavDrawerItem(navMenuTitles[4]));
            //Application
            navDrawerItems.add(new NavDrawerItem(navMenuTitles[6]));
            //Payments
            navDrawerItems.add(new NavDrawerItem(navMenuTitles[8]));
            //Notification
            navDrawerItems.add(new NavDrawerItem(navMenuTitles[10]));
            //Message
            navDrawerItems.add(new NavDrawerItem(navMenuTitles[12]));
            // About
            navDrawerItems.add(new NavDrawerItem(navMenuTitles[2]));
            //Log out
            navDrawerItems.add(new NavDrawerItem(navMenuTitles[13]));

        } else if (status.equals("employer")) {
            Log.d(TAG, "employer drawer");
            navDrawerItems.clear();
            navDrawerItems.remove(new NavDrawerItem(navMenuTitles[1])); // login
            navDrawerItems.remove(new NavDrawerItem(navMenuTitles[2])); // about

            //News
            navDrawerItems.add(new NavDrawerItem(navMenuTitles[0]));
            //Employer Profile
            navDrawerItems.add(new NavDrawerItem(navMenuTitles[14]));
            //Message
            navDrawerItems.add(new NavDrawerItem(navMenuTitles[12]));
            // About
            navDrawerItems.add(new NavDrawerItem(navMenuTitles[2]));
            //Log out
            navDrawerItems.add(new NavDrawerItem(navMenuTitles[13]));

        } else {
            Log.d(TAG, "default drawer 1");
            navDrawerItems.clear();
            //News
            navDrawerItems.add(new NavDrawerItem(navMenuTitles[0]));
            // Login
            navDrawerItems.add(new NavDrawerItem(navMenuTitles[1]));
            // About
            navDrawerItems.add(new NavDrawerItem(navMenuTitles[2]));
        }
    } else {
        Log.d(TAG, "default drawer 2");

        //Members News
        navDrawerItems.add(new NavDrawerItem(navMenuTitles[0]));
        // Login
        navDrawerItems.add(new NavDrawerItem(navMenuTitles[1]));
        // About
        navDrawerItems.add(new NavDrawerItem(navMenuTitles[2]));
    }
}


@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    setContentView(R.layout.activity_main);

    shared = getSharedPreferences("SSSPref", Context.MODE_PRIVATE);
    edit = shared.edit();

//        status = shared.getString("Status", "");

    getSupportActionBar().setLogo(R.drawable.toolbarimage);
    getSupportActionBar().setDisplayUseLogoEnabled(true);
    getSupportActionBar().setDisplayShowHomeEnabled(true);

    displayDrawer();

    if (savedInstanceState == null) {
        // on first time display view for first nav item
        displayView(0);
    }

    initControls();
}

private class SlideMenuClickListener implements
        ListView.OnItemClickListener {
    @Override
    public void onItemClick(AdapterView<?> parent, View view, int position,
                            long id) {
        // display view for selected nav drawer item
        displayView(position);
    }
}

private void displayView(int position) {
    // update the main content by replacing fragments
    Context context = getApplicationContext();
    CharSequence text = "This is not yet available";
    int duration = Toast.LENGTH_SHORT;

    Toast toast = Toast.makeText(context, text, duration);

    Fragment fragment = null;
    Intent i;
    switch (position) {
        case 0:
            if(status.equals("employee")){
                fragment = new HomeEmployeeFragment();
            }else if(status.equals("employer")){
                fragment = new HomeEmployerFragment();
            }else{
                fragment = new HomeFragment();
            }

            break;
        case 1:
            if(status.equals("employee")){
                fragment = new EmpProfileFragment();
                btn_login_reg.setEnabled(false);
            }else if(status.equals("employer")){
                fragment = new EmprProfileFragment();
            }else{
                fragment = new LoginFragment();
            }
            break;
        case 2:
            if(status.equals("employee")){
                toast.show();
            }else if(status.equals("employer")){
                toast.show();
            }else {
                fragment = new AboutFragment();
            }
            break;
        case 3:
            if(status.equals("employee")){
                fragment = new LoanApplicationFragment();
            }else if(status.equals("employer")){
                toast.show();
            }else {
                toast.show();
            }
            break;
        case 4:
            if(status.equals("employee")){
                fragment = new DetailFragment();
            }else if(status.equals("employer")){
                toast.show();
            }else {
                toast.show();
            }
            break;
        case 5:
            if(status.equals("employee")){
                toast.show();
            }else if(status.equals("employer")){
                toast.show();
            }else{

            }
            break;
        case 6:
            if(status.equals("employee")){
                fragment = new LoanEligibilityFragment();
            }else if(status.equals("employer")){
                fragment = new AboutFragment();
            }else {
                toast.show();
            }
            break;
        case 7:
            if(status.equals("employee")){
                toast.show();
            }else if(status.equals("employer")){
                i = new Intent(this, MainActivity.class);
                startActivity(i);
                finish();
                edit.remove("Status");
                edit.commit();
            }else{

            }
            break;
        case 8:
            if(status.equals("employee")){
                toast.show();
            }else if(status.equals("employer")){
                toast.show();
            }else{
                toast.show();
            }
            break;
        case 9:
            if(status.equals("employee")){
                toast.show();
            }else if(status.equals("employer")){
                fragment = new AboutFragment();
            }else{

            }

            break;
        case 10:
            if(status.equals("employee")){
                fragment = new AboutFragment();
            }else if(status.equals("employer")){
                toast.show();
            }else{
                toast.show();
            }
            break;
        case 11:
            i = new Intent(this, MainActivity.class);
            startActivity(i);
            finish();
            edit.remove("Status");
            edit.commit();
            break;
        default:
            fragment = new HomeFragment();
            break;
    }

    if (fragment != null) {
        FragmentManager fragmentManager = getFragmentManager();
        fragmentManager.beginTransaction()
                .replace(R.id.frame_container, fragment).commit();

        // update selected item and title, then close the drawer
        mDrawerList.setItemChecked(position, true);
        mDrawerList.setSelection(position);
        setTitle(navMenuTitles[position]);
        mDrawerLayout.closeDrawer(mDrawerList);
    } else {
        // error in creating fragment
        Log.e("MainActivity", "Error in creating fragment");
    }
}