materi_header.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:orientation="vertical"
    tools:context=".fragment.MateriFragment"
    android:padding="10dp">
    <TextView
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="Modul Week 1"
        android:id="@+id/modul"
        />
    <View
        android:layout_width="match_parent"
        android:layout_height="2dp"
        android:background="#C4C4C4"
        />
    <androidx.recyclerview.widget.RecyclerView
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_marginTop="8dp"
        android:id="@+id/list_materi"
        tools:listitem="@layout/materi_footer"
        />
</LinearLayout>