Баннер Google Admob под панелью навигации

Ниже мой файл Activity_main.xml

Скриншот Activity_Main.xml

В моем макете основной активности приложения для Android Google Admob находится под верхней панелью приложений, и я хочу переключить баннер Admob на ниже навигационного баннера.

<?xml version = "1.0" encoding = "utf-8"?>
<android.support.v4.widget.DrawerLayout 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:id = "@+id/drawer_layout"
    android:layout_width = "match_parent"
    android:layout_height = "match_parent"
    android:fitsSystemWindows = "false"
    tools:openDrawer = "start">

    <RelativeLayout
        android:layout_width = "match_parent"
        android:layout_height = "match_parent" >

        <android.support.design.widget.CoordinatorLayout
            xmlns:android = "http://schemas.android.com/apk/res/android"
            xmlns:app = "http://schemas.android.com/apk/res-auto"
            android:id = "@+id/parent_view"
            android:layout_width = "match_parent"
            android:layout_height = "match_parent">

            <android.support.design.widget.AppBarLayout
                android:id = "@+id/appbar_layout"
                android:layout_width = "match_parent"
                android:layout_height = "wrap_content"
                android:background = "@color/colorPrimary"
                android:fitsSystemWindows = "true"
                android:theme = "@style/ThemeOverlay.AppCompat.Light">

                <LinearLayout
                    android:id = "@+id/appbar_main_layout"
                    android:layout_width = "match_parent"
                    android:layout_height = "wrap_content"
                    android:orientation = "vertical"
                    app:layout_scrollFlags = "scroll|enterAlways">

                    <LinearLayout
                        android:id = "@+id/container_toolbar"
                        android:layout_width = "match_parent"
                        android:layout_height = "wrap_content"
                        android:orientation = "vertical"
                        app:layout_collapseMode = "parallax">

                        <include
                            android:id = "@+id/toolbar"
                            layout = "@layout/toolbar" />

                    </LinearLayout>

                    <LinearLayout
                        android:id = "@+id/container_admob"
                        android:layout_width = "match_parent"
                        android:layout_height = "50dp"
                        android:layout_marginTop = "5dp"
                        android:layout_marginBottom = "7dp"
                        android:background = "#00ffffff"
                        android:gravity = "center"
                        android:orientation = "vertical"
                        android:visibility = "visible">

                        <com.google.android.gms.ads.AdView xmlns:ads = "http://schemas.android.com/apk/res-auto"
                            android:id = "@+id/adView"
                            android:layout_width = "wrap_content"
                            android:layout_height = "wrap_content"
                            android:layout_alignParentBottom = "true"
                            android:layout_centerHorizontal = "true"
                            ads:adSize = "BANNER"
                            ads:adUnitId = "@string/banner_ad_unit_id">

                        </com.google.android.gms.ads.AdView>

                    </LinearLayout>

                </LinearLayout>

            </android.support.design.widget.AppBarLayout>

            <LinearLayout
                android:layout_width = "match_parent"
                android:layout_height = "match_parent"
                android:background = "@color/grey_3"
                android:focusableInTouchMode = "true"
                android:layout_weight = "1"
                android:orientation = "vertical"
                app:layout_behavior = "@string/appbar_scrolling_view_behavior" >

                <FrameLayout
                    android:id = "@+id/container_body"
                    android:layout_width = "fill_parent"
                    android:layout_height = "0dp"
                    android:paddingBottom = "?android:attr/actionBarSize"
                    android:layout_weight = "1"
                    android:visibility = "visible" />

            </LinearLayout>

        </android.support.design.widget.CoordinatorLayout>

        <android.support.design.widget.BottomNavigationView
            android:id = "@+id/nav_bottom_view"
            android:layout_width = "match_parent"
            android:layout_height = "wrap_content"
            android:layout_gravity = "bottom"
            android:layout_alignParentBottom = "true"
            android:background = "@android:color/white"
            app:itemIconTint = "@drawable/color_state_primary_2"
            app:itemTextColor = "@drawable/color_state_primary_2"
            app:menu = "@menu/menu_nav_bottom" />

    </RelativeLayout>

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

В моем макете основной активности приложения для Android Google Admob находится ниже верхней панели приложений, и я хочу переключить баннер Admob на ниже баннера навигации. Пожалуйста, помогите мне решить эту проблему, заранее спасибо!