我想隐藏导航抽屉菜单中的一个菜单项,并根据使用应用程序的用户类型显示它。根据下面的代码,菜单项返回null:
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
ActionBarDrawerToggle toggle = new ActionBarDrawerToggle(
this, drawer, toolbar, R.string.navigation_drawer_open,R.string.navigation_drawer_close);
drawer.setDrawerListener(toggle);
toggle.syncState();
MenuItem target = (MenuItem)drawer.findViewById(R.id.nav_target);
target.setVisible(false);
menu.findItem(R.id.nav_target)
吗? - droid8421