如何在WebView下面的按钮中实现此CoordinatorLayout

<androidx.coordinatorlayout.widget.CoordinatorLayout
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <WebView
        android:id="@+id/webView"
        android:layout_width="match_parent"
        android:layout_height="match_parent" />

    <Button
        android:id="@+id/button"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Button"
        app:layout_anchor="@id/webView"
        app:layout_anchorGravity="bottom|end" />

</androidx.coordinatorlayout.widget.CoordinatorLayout>

WebView webView = findViewById(R.id.webView);
Button button = findViewById(R.id.button);

// 设置WebView的布局参数
CoordinatorLayout.LayoutParams webViewParams = (CoordinatorLayout.LayoutParams) webView.getLayoutParams();
webViewParams.setBehavior(new AppBarLayout.ScrollingViewBehavior());

// 设置按钮的布局参数
CoordinatorLayout.LayoutParams buttonParams = (CoordinatorLayout.LayoutParams) button.getLayoutParams();
buttonParams.setAnchorId(R.id.webView);
buttonParams.anchorGravity = Gravity.BOTTOM | Gravity.END;