<com.google.android.gms.ads.AdView
        android:id="@+id/loadingAdView"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center_horizontal"
        ads:adSize="MEDIUM_RECTANGLE"
        ads:adUnitId="@string/loading_banner_ad_unit_id"
        android:layout_marginTop="10dp"
        android:layout_marginBottom="10dp"/>

AdRequest.Builder adRequestBuilder = new AdRequest.Builder();
AdRequest adRequest =adRequestBuilder.setRequestAgent("android_studio:ad_template").build();
loadingAdView.loadAd(adRequest);