Lacerta/app/src/main/res/layout/activity_main.xml

<androidx.constraintlayout.widget.ConstraintLayout 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:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="@color/colorSurface">

    <androidx.coordinatorlayout.widget.CoordinatorLayout
        android:layout_width="0dp"
        android:layout_height="0dp"
        app:layout_constraintBottom_toTopOf="@id/bottom_nav"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent">

        <com.google.android.material.appbar.AppBarLayout
            android:id="@+id/app_bar_layout"
            android:layout_width="match_parent"
            android:layout_height="wrap_content">

            <com.google.android.material.appbar.CollapsingToolbarLayout
                android:id="@+id/collapsing_toolbar"
                android:layout_width="match_parent"
                android:layout_height="160dp"
                android:background="@color/colorSurface"
                android:fitsSystemWindows="true"
                android:minHeight="?attr/actionBarSize"
                app:collapsedTitleGravity="start|center_vertical"
                app:contentScrim="@color/colorSecondaryContainer"
                app:expandedTitleGravity="start|bottom"
                app:expandedTitleMarginBottom="16dp"
                app:expandedTitleMarginStart="16dp"
                app:expandedTitleTextAppearance="@style/TextAppearance.MaterialComponents.Headline4"
                app:layout_scrollFlags="scroll|exitUntilCollapsed">

                <androidx.appcompat.widget.Toolbar
                    android:id="@+id/toolbar"
                    android:layout_width="match_parent"
                    android:layout_height="?attr/actionBarSize"
                    app:layout_collapseMode="pin"
                    app:title="HOGE" />

            </com.google.android.material.appbar.CollapsingToolbarLayout>

        </com.google.android.material.appbar.AppBarLayout>

        <androidx.fragment.app.FragmentContainerView

            android:id="@+id/nav_host_fragment"
            android:name="androidx.navigation.fragment.NavHostFragment"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            app:defaultNavHost="true"
            app:navGraph="@navigation/main_nav"
            tools:layout="@layout/fragment_home_top" />

    </androidx.coordinatorlayout.widget.CoordinatorLayout>

    <com.google.android.material.bottomnavigation.BottomNavigationView
        android:id="@+id/bottom_nav"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:background="@color/colorSecondaryContainer"
        app:itemIconTint="@color/colorOnSecondaryContainer"
        app:itemTextColor="@color/colorOnSecondaryContainer"
        app:itemActiveIndicatorStyle="@style/Lacerta.Custom.Indicator"
        app:labelVisibilityMode="selected"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:menu="@menu/bottom_nav_menu" />

</androidx.constraintlayout.widget.ConstraintLayout>