BayernMessenger/vector/src/main/res/layout/fragment_home_detail.xml

<?xml version="1.0" encoding="utf-8"?>

<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">

    <androidx.appcompat.widget.Toolbar
        android:id="@+id/groupToolbar"
        style="@style/VectorToolbarStyle"
        android:layout_width="match_parent"
        android:layout_height="?attr/actionBarSize"
        android:background="#FFFFFF"
        app:contentInsetStartWithNavigation="0dp"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        app:popupTheme="@style/ThemeOverlay.AppCompat.Light"
        app:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar">

        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:gravity="center_vertical"
            android:orientation="horizontal">

            <ImageView
                android:id="@+id/groupToolbarAvatarImageView"
                android:layout_width="32dp"
                android:layout_height="32dp"
                tools:src="@tools:sample/avatars" />

            <TextView
                android:id="@+id/groupToolbarTitleView"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_marginStart="32dp"
                android:layout_marginEnd="32dp"
                android:ellipsize="end"
                android:maxLines="1"
                android:textColor="@color/dark_grey"
                android:textSize="20sp"
                android:textStyle="bold"
                tools:text="@tools:sample/lorem/random" />

        </LinearLayout>

    </androidx.appcompat.widget.Toolbar>

    <FrameLayout
        android:id="@+id/roomListContainer"
        android:layout_width="match_parent"
        android:layout_height="0dp"
        android:background="#F3F8FD"
        app:layout_constraintBottom_toTopOf="@+id/bottomNavigationView"
        app:layout_constraintTop_toBottomOf="@+id/groupToolbar" />

    <com.google.android.material.bottomnavigation.BottomNavigationView
        android:id="@+id/bottomNavigationView"
        android:layout_width="0dp"
        android:layout_height="48dp"
        android:background="#FFFFFF"
        app:itemIconTint="@color/home_bottom_nav_view_tint"
        app:itemTextColor="@color/home_bottom_nav_view_tint"
        app:labelVisibilityMode="unlabeled"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:menu="@menu/home_bottom_navigation" />

</androidx.constraintlayout.widget.ConstraintLayout>