Android List Below Toggle Buttons

Android List Below Toggle Buttons

I have a list that is intended to be below toggle buttons. The list grabs
data from a server and then parses them. My XML is as follows:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:orientation="horizontal" >
<ToggleButton
android:id="@+id/toggle_button1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
android:textOff="Apps"
android:textOn="Apps" />
<ToggleButton
android:id="@+id/toggle_button2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_toRightOf="@id/toggle_button1"
android:layout_weight="1"
android:textOff="VMs"
android:textOn="VMs" />
<ToggleButton
android:id="@+id/toggle_button3"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_toRightOf="@id/toggle_button2"
android:layout_weight="1"
android:textOff="Groups"
android:textOn="Groups" />
<ListView
android:id="@+id/mylist"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_below="@id/toggle_button1" />
</RelativeLayout>
However, when I use setListAdapter(list), the buttons are overwritten.
They are visible before the app retrieves the data and parses it, but they
are overwritten after I call setListAdapter. How can i fix this?