Change NavigationView items when user is logged

I thing the best approach to this is to include all your items in the menu and the change their visibility.

<item
    android:id="@+id/login"
    android:icon="@drawable/ic_action_person"
    android:title="@string/login"
    android:visible="true" />

<item
    android:id="@+id/logout"
    android:icon="@drawable/ic_action_person"
    android:title="@string/logout"
    android:visible="false" />

then

navigationView.getMenu().findItem(R.id.login).setVisible(false);
navigationView.getMenu().findItem(R.id.logout).setVisible(true);

You can also do this with whole groups of items

<group
    android:id="@+id/group_1"
    android:checkableBehavior="single"
    android:visible="false">
    ...
</group>

and

navigationView.getMenu().setGroupVisible(R.id.group_1, true)

Simple solution:
Add two xml files in menu directory:

1. navigation_with_login.xml Navigation Menu for logged in users

   <?xml version="1.0" encoding="utf-8"?>
   <menu xmlns:android="http://schemas.android.com/apk/res/android">
   
       <group android:checkableBehavior="single">
           <item
               android:id="@+id/nav_camera"
               android:icon="@drawable/ic_menu_camera"
               android:title="Import" />
           <item
               android:id="@+id/nav_gallery"
               android:icon="@drawable/ic_menu_gallery"
               android:title="Gallery" />
           <item
               android:id="@+id/nav_slideshow"
               android:icon="@drawable/ic_menu_slideshow"
               android:title="Slideshow" />
           <item
               android:id="@+id/nav_login"
               android:icon="@drawable/ic_menu_login"
               android:title="Login" />
       </group>
   
   
   </menu>
   

2. navigation_with_logout.xml Navigation Menu for default user:

   <?xml version="1.0" encoding="utf-8"?>
   <menu xmlns:android="http://schemas.android.com/apk/res/android">
   
       <group android:checkableBehavior="single">
           <item
               android:id="@+id/nav_camera"
               android:icon="@drawable/ic_menu_camera"
               android:title="Import" />
           <item
               android:id="@+id/nav_gallery"
               android:icon="@drawable/ic_menu_gallery"
               android:title="Gallery" />
           <item
               android:id="@+id/nav_slideshow"
               android:icon="@drawable/ic_menu_slideshow"
               android:title="Slideshow" />
           <item
               android:id="@+id/nav_logout"
               android:icon="@drawable/ic_menu_logout"
               android:title="Logout" />
       </group>
   
   </menu>
   

Now you can change NavigationView items,just write few lines of code.

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

if(islogin)
    {
        navigationView.getMenu().clear();
        navigationView.inflateMenu(R.menu.navigation_with_login);
    } else
    {
        navigationView.getMenu().clear();
        navigationView.inflateMenu(R.menu.navigation_with_logout);
    }

Frst get the navigationmenu

 NavigationView navigationView = (NavigationView) findViewById(R.id.nav_view);
Menu menu = navigationView.getMenu();

To add the menu dynamically

 if(loggedOut){
        menu.add(R.id.submenu_others, R.id.action_logout, Menu.NONE, "logout");
}

Here is menu.add(groupId, menuItemId, orderOfMenu, menuItem text)

     if(loggedIn){
        menu.removeItem(R.id.action_logout);
}

I got it done, try this when you need to change the title:

navigationView.getMenu().findItem(R.id.yourItemId).setTitle("my title");

Hope it helped!