nav_view.xml

		<?xml version="1.0" encoding="utf-8"?>
		<navigation xmlns:android="http://schemas.android.com/apk/res/android"
		    xmlns:app="http://schemas.android.com/apk/res-auto"
		    xmlns:tools="http://schemas.android.com/tools"
		    app:startDestination="@+id/navigation_home">
		
		    <fragment
		        android:id="@+id/navigation_home"
		        android:name="com.example.bottomnavigationkotlin.fragments.HomeFragment"
		        tools:layout="@layout/fragment_home" />
		
		    <fragment
		        android:id="@+id/navigation_chat"
		        android:name="com.example.bottomnavigationkotlin.fragments.ChatFragment"
		        tools:layout="@layout/fragment_chat" />
		
		    <fragment
		        android:id="@+id/navigation_profile"
		        android:name="com.example.bottomnavigationkotlin.fragments.ProfileFragment"
		        tools:layout="@layout/fragment_profile" />
		</navigation>