Android listview with header and footer buttons

folks! I need to make such layout: I've got listview and I need to put buttons on top and on the bottom of it, i.e. when user scrolls list to the end, he can see bottom button, and when user is on the top of list, he can see top button. But when user is 'in the middle' of listview, he can't see those buttons. I've got no idea how to do it. Thanks for help.

UPDATE

listView=(ListView)findViewById(R.id.listSearchResults);

        LayoutInflater inflater=this.getLayoutInflater();

        View header=inflater.inflate(R.layout.list_header, null);

        btnBack=(Button)header.findViewById(R.id.btnBack);
        btnBack.setOnClickListener(this);
        btnBack.setEnabled(false);

        listView.addHeaderView(header);

        View footer=inflater.inflate(R.layout.list_footer, null);

        btnForward=(Button)footer.findViewById(R.id.btnForward);
        btnForward.setOnClickListener(this);
        btnForward.setEnabled(false);
        listView.addFooterView(footer);

First create two layout file. like as footer_layout.xml & header_layout.xml and add footerview-headerview in list view

LayoutInflater inflater = activity.getLayoutInflater();
LinearLayout listFooterView = (LinearLayout)inflater.inflate(
            R.layout.footer_layout, null);

list.addFooterView(listFooterView);


LinearLayout listHeaderView = (LinearLayout)inflater.inflate(
                R.layout.header_layout, null);

    list.addHeaderView(listHeaderView);

You can use addHeaderView() and addFooterView() on your ListView