A Computer Engineer

You can programmatically add, hide or show items in NavigationView in Android.

First set your Android Project with NavigationView from Android Studio.

Follow the below code for that.

NavigationView navigationView = (NavigationView) findViewById(R.id.nav_view);

//add new item at the end of NavigationView menu
MenuItem mi = navigationView.getMenu().add(Menu.NONE, Menu.NONE, Menu.NONE, "Menu Item 1");

//set icon for that menu item
mi.setIcon(R.drawable.ic_icon_menu_item);

//hide the menuitem
mi.setVisible(false);

//show the menuitem
mi.setVisible(true);

//highlight the menuitem
mi.setChecked(true);

//un-highlight the menuitem
mi.setChecked(false);