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

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:fitsSystemWindows="true"
    android:orientation="vertical">

    <androidx.coordinatorlayout.widget.CoordinatorLayout
        android:id="@+id/drawer_layout"
        android:layout_width="match_parent"
        android:layout_height="0dp"
        android:layout_weight="1">

        <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/nav_graph"/>

        <FrameLayout
            android:id="@+id/player_bottom_sheet"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            app:behavior_hideable="true"
            app:behavior_peekHeight="@dimen/bottom_sheet_peek_height"
            app:layout_behavior="@string/bottom_sheet_behavior"/>

    </androidx.coordinatorlayout.widget.CoordinatorLayout>

    <com.google.android.material.bottomnavigation.BottomNavigationView
        android:id="@+id/bottom_navigation"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:background="@drawable/bottom_nav_shape"
        android:visibility="gone"
        app:itemIconTint="@drawable/bottom_nav_selector"
        app:labelVisibilityMode="unlabeled"
        app:menu="@menu/bottom_nav_menu"/>

    <TextView
        android:id="@+id/offline_mode_text_view"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:background="@color/colorAccent"
        android:gravity="center"
        android:textColor="@android:color/white"
        android:textSize="6dp"
        android:text="Offline mode"
        android:visibility="gone"/>
</LinearLayout>