Kotlin Admob 横幅广告放置

Question

我的横幅广告位于回收站视图的底部，不随屏幕移动，但它必须位于底部导航。当用户向下滚动屏幕时，横幅广告必须随屏幕移动，但我的站在回收站视图的底部且不移动。我怎么能解决这个？

谢谢这里举个例子

<?xml version="1.0" encoding="utf-8"?>
<androidx.core.widget.NestedScrollView 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="wrap_content"
    android:background="@color/gray1"
    tools:context=".MainActivity">

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="vertical"
        android:background="@color/gray1">

        <!--Search-->
        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:orientation="horizontal"
            android:background="@drawable/shape_rect01"
            android:gravity="center"
            android:layout_margin="5dp">

            <!--EditText: Search Query-->
            <EditText
                android:id="@+id/searchEt"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_weight="1"
                android:background="@android:color/transparent"
                android:hint="Arama Kutusu"
                android:padding="10dp"
                android:textColor="@color/black"
                android:textColorHint="@color/gray1"
                tools:ignore="TouchTargetSizeCheck" />

            <!--ImageButton: Click to search-->
            <ImageButton
                android:id="@+id/searchBtn"
                android:layout_width="40dp"
                android:layout_height="40dp"
                android:layout_marginEnd="5dp"
                android:background="@drawable/shape_rect02"
                android:src="@drawable/ic_baseline_search_24"
                app:tint="@color/black"
                tools:ignore="SpeakableTextPresentCheck,TouchTargetSizeCheck" />

        </LinearLayout>


        <!--RecyclerView: load posts-->
        <androidx.recyclerview.widget.RecyclerView
            android:id="@+id/postsRv"
            tools:listitem="@layout/row_post"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            app:layoutManager="androidx.recyclerview.widget.LinearLayoutManager"/>

        <com.google.android.gms.ads.AdView
            android:id="@+id/adView"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_alignParentBottom="true"
            android:layout_centerHorizontal="true"
            app:adSize="BANNER"
            app:adUnitId="ca-app-pub-3940256099942544/6300978111">
        </com.google.android.gms.ads.AdView>

    </LinearLayout>
    
</androidx.core.widget.NestedScrollView>