Why am I unable to correctly position a Relative layout in a vertical linear layout?

[AC Question]

Unable to correctly position a Relativelayout in a vertical linearlayout

I have a vertical linearLayout. At the bottom is a placeholder to which a WebView is added programmatically. Below that is a relativeLayout which contains a footer. However this relativeLayout is not postioned below the placeholder/webview, but behind it. How can i get a relativeLayout to position vertically below the last element in my linearLayout?