bottom_nav_graph.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"
    android:id="@+id/bottom_nav_graph.xml"
    app:startDestination="@id/homeFragment">

    <fragment
        android:id="@+id/homeFragment"
        android:name="com.wajahatkarim3.bottomnavigationdemo.HomeFragment"
        android:label="Home"
        tools:layout="@layout/fragment_home" />

    <fragment
        android:id="@+id/searchFragment"
        android:name="com.wajahatkarim3.bottomnavigationdemo.SearchFragment"
        android:label="Search"
        tools:layout="@layout/fragment_search" />

    <fragment
        android:id="@+id/notificationsFragment"
        android:name="com.wajahatkarim3.bottomnavigationdemo.NotificationsFragment"
        android:label="Notifications"
        tools:layout="@layout/fragment_notifications" >
        <action
            android:id="@+id/action_notificationsFragment_to_notificationDetailsFragment"
            app:destination="@id/notificationDetailsFragment" />
    </fragment>

    <fragment
        android:id="@+id/profileFragment"
        android:name="com.wajahatkarim3.bottomnavigationdemo.ProfileFragment"
        android:label="Profile"
        tools:layout="@layout/fragment_profile" />
    
    <fragment
        android:id="@+id/notificationDetailsFragment"
        android:name="com.wajahatkarim3.bottomnavigationdemo.NotificationDetailsFragment"
        android:label="fragment_notification_details"
        tools:layout="@layout/fragment_notification_details" />

</navigation>