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/nav_graph.xml"
    app:startDestination="@id/charactersFragment">

    <fragment
        android:id="@+id/charactersFragment"
        android:name="br.com.samuelnunes.rickandmortyapp.ui.charactersFragment.CharactersFragment"
        android:label="characters_fragment"
        tools:layout="@layout/characters_fragment" />
</navigation>