java - 如何隐藏底部导航栏的项目

Question

大家好，我正在尝试让用户登录，如果他不是管理员，我想要一些底部导航栏 隐藏 我想在用户 Activity 显示之前隐藏项目 我正在通过激活用户登录发送某个值，并且我想在向用户显示屏幕之前验证该值是否等于用户答案隐藏图标 我尝试获取图标 id，但我不知道正确的方法，请帮助，谢谢

@Override
protected void onStart() {
    super.onStart();
    BottomNavigationViewEx bottomNavigationViewEx = new BottomNavigationViewEx().findViewById(R.id.addproudactbtnbar).setVisibility(false);
}

我的 XML

    <com.ittianyu.bottomnavigationviewex.BottomNavigationViewEx

        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:id="@+id/bottm_navigation_menu"
        android:background="@color/colorPrimary"
        app:menu="@menu/bottm_navigation_menu"
        >
    </com.ittianyu.bottomnavigationviewex.BottomNavigationViewEx>







  public void setupbottmnavigationview(){

        BottomNavigationViewEx bottomnavigationviewex = findViewById(R.id.bottm_navigation_menu);
        BottomNvigationViewHelper.botomnavigationview(bottomnavigationviewex);
        BottomNvigationViewHelper.enebleactivty(Home.this , bottomnavigationviewex);
        Menu menu = bottomnavigationviewex.getMenu();
        MenuItem menuItem = menu.getItem(ATIVYTY_NUM);
        menuItem.setChecked(true);
        }

我的导航助手

public class BottomNvigationViewHelper {


    public  static void botomnavigationview (BottomNavigationViewEx bottomNavigationViewEx){
        bottomNavigationViewEx.enableAnimation(false);
        bottomNavigationViewEx.enableItemShiftingMode(false);
        bottomNavigationViewEx.enableShiftingMode(false);
        bottomNavigationViewEx.setTextVisibility(false);


    }


    public  static  void  enebleactivty(final Context context , BottomNavigationViewEx viewEx){
        viewEx.setOnNavigationItemSelectedListener(new BottomNavigationView.OnNavigationItemSelectedListener() {
            @Override
            public boolean onNavigationItemSelected(@NonNull MenuItem item) {

                switch (item.getItemId()){
                    case R.id.homebtnbar:
                        Intent intent1 = new Intent(context, HomeScreenActivity.class);
                        context.startActivity(intent1);
                        break;
                    case R.id.profilebtnbar:
                        Intent intent2 = new Intent(context, ProfileScreenActivity.class);
                        context.startActivity(intent2);
                        break;
                    case R.id.searchusersbtnbar:
                        Intent intent3 = new Intent(context, SearchScreenActivity.class);
                        context.startActivity(intent3);
                        break;
                    case R.id.deleverybtnbar:
                        Intent intent4 = new Intent(context, DeleviryScreenActivity.class);
                        context.startActivity(intent4);
                        break;
                    case R.id.addproudactbtnbar:
                        Intent intent5 = new Intent(context, Addproudacts.class);
                        context.startActivity(intent5);
                        break;

                }

                return false;
            }
        });

    }
}

Answer 1

您可以根据用户的类型以编程方式扩展菜单

navigationView.getMenu().clear(); //clear old inflated items.
navigationView.inflateMenu(R.menu.new_navigation_drawer_items);

从此answer