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

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

    <data>

    </data>

    <androidx.appcompat.widget.LinearLayoutCompat
        style="@style/match"
        android:weightSum="1"
        android:background="@mipmap/activity_background"
        android:orientation="vertical"
        tools:context=".view.MainActivity">

        <com.google.android.material.appbar.AppBarLayout
            style="@style/fullWidth"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toTopOf="parent">

            <com.google.android.material.appbar.MaterialToolbar
                android:id="@+id/materialToolbar"
                style="@style/Widget.MaterialComponents.Toolbar.Primary"
                android:layout_width="match_parent"
                android:layout_height="?attr/actionBarSize" />

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

        <androidx.fragment.app.FragmentContainerView
            android:id="@+id/navActivity"
            android:name="androidx.navigation.fragment.NavHostFragment"
            android:layout_width="match_parent"
            android:layout_height="0dp"
            android:layout_weight="1"
            app:defaultNavHost="true"
            app:layout_constraintBottom_toBottomOf="parent"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toTopOf="parent"
            app:navGraph="@navigation/nav_main" />
    </androidx.appcompat.widget.LinearLayoutCompat>
</layout>