Set Android NavigationView below Toolbar in default Android Studio Project Template

activity_main.xml

<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">

    <android.support.v7.widget.Toolbar
        android:id="@+id/toolbar"
        android:layout_width="match_parent"
        android:layout_height="@dimen/abc_action_bar_default_height_material"
        android:background="?attr/colorPrimary"
        android:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar"/>

    <android.support.v4.widget.DrawerLayout
        android:id="@+id/drawer_layout"
        android:layout_width="match_parent"
        android:layout_height="match_parent">

        <!-- content_main in app_bar_main put here -->
        <FrameLayout
            android:id="@+id/content_main"
            android:layout_width="match_parent"
            android:layout_height="match_parent"/>
            
        <!-- or you can use same method as default android studio default template by including content_main -->
        <!--        <include layout="@layout/content_main"/>    -->

        <!-- The navigation drawer -->
        <android.support.design.widget.NavigationView
            android:id="@+id/nav_view"
            android:layout_width="wrap_content"
            android:layout_height="match_parent"
            android:layout_gravity="start"
            app:headerLayout="@layout/nav_header_main"
            app:menu="@menu/activity_main_drawer"/>

    </android.support.v4.widget.DrawerLayout>
</LinearLayout>