avh-plan-android/app/src/main/res/layout/app_bar_main.xml

<?xml version="1.0" encoding="utf-8"?>
<androidx.coordinatorlayout.widget.CoordinatorLayout 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"
    tools:context=".activities.Main">

    <com.google.android.material.appbar.AppBarLayout
        android:id="@+id/appbarlayout"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:background="@color/colorBackground"
        android:elevation="0dp">

        <androidx.appcompat.widget.Toolbar
            android:id="@+id/toolbar"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            app:titleTextColor="@color/colorAccent"
            app:contentInsetStart="0dp"
            android:elevation="0dp"
            app:layout_scrollFlags="scroll|enterAlwaysCollapsed">

<!--            84dp-->

            <androidx.constraintlayout.widget.ConstraintLayout
                android:layout_width="match_parent"
                android:layout_height="wrap_content">

                <TextView
                    android:id="@+id/text_greeting"
                    android:layout_width="0dp"
                    android:layout_height="wrap_content"
                    android:layout_marginStart="16dp"
                    android:layout_marginTop="8dp"
                    android:textColor="@color/colorAccent"
                    android:textSize="18sp"
                    android:fontFamily="@font/manrope_semibold"
                    app:layout_constraintTop_toTopOf="parent"
                    app:layout_constraintStart_toStartOf="parent"/>

                <TextView
                    android:id="@+id/toolbarTxt"
                    android:layout_width="0dp"
                    android:layout_height="wrap_content"
                    android:layout_gravity="start"
                    android:fontFamily="@font/manrope_extrabold"
                    android:text="@string/appName"
                    android:textColor="@color/colorAccent"
                    android:textSize="24sp"
                    android:singleLine="true"
                    android:layout_marginStart="16dp"
                    android:layout_marginEnd="16dp"
                    android:layout_marginTop="4dp"
                    android:layout_marginBottom="4dp"
                    app:layout_constraintTop_toBottomOf="@+id/text_greeting"
                    app:layout_constraintBottom_toBottomOf="parent"
                    app:layout_constraintStart_toStartOf="parent"
                    app:layout_constraintEnd_toEndOf="parent"/>

            </androidx.constraintlayout.widget.ConstraintLayout>

        </androidx.appcompat.widget.Toolbar>

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

    <include layout="@layout/content_main" />

    <View
        android:id="@+id/bottom_nav_divider"
        android:layout_width="match_parent"
        android:layout_height="1dp"
        android:layout_marginStart="8dp"
        android:layout_marginEnd="8dp"
        app:layout_anchor="@+id/bottom_nav"
        android:layout_gravity="top"
        android:background="@color/colorHintLight"
        android:clickable="false"
        android:focusable="false"/>

    <com.google.android.material.bottomnavigation.BottomNavigationView
        android:id="@+id/bottom_nav"
        android:layout_width="match_parent"
        android:layout_height="56dp"
        android:layout_marginBottom="0dp"
        app:elevation="0dp"
        android:layout_gravity="bottom"
        app:menu="@menu/nav_items"
        android:background="@color/colorBackground"
        app:itemIconTint="@color/bottom_nav_color"
        app:itemTextColor="@color/bottom_nav_color"
        app:itemRippleColor="@color/colorAccent"/>

    <androidx.coordinatorlayout.widget.CoordinatorLayout
        android:id="@+id/coordination"
        android:layout_width="match_parent"
        android:layout_height="80dp"
        app:layout_anchor="@+id/bottom_nav"
        android:layout_gravity="top"
        android:clickable="false"
        android:focusable="false"/>

</androidx.coordinatorlayout.widget.CoordinatorLayout>