Scale background image to wrap content of layout

I have a layout that contains some text fields and has a background image that's displayed at the top of my activity. I'd like the background image to scale to wrap the content (don't care about aspect ratio). However, the image is larger than content, so the layout instead wraps the background image. Here's my original code:

<RelativeLayout 
    android:layout_width="fill_parent"
    android:id="@+id/HeaderList" 
    android:layout_gravity="top"
    android:layout_height="wrap_content" 
    android:background="@drawable/header">
    <TextView 
        android:layout_height="wrap_content"
        android:layout_width="wrap_content" 
        android:id="@+id/NameText"
        android:text="Jhn Doe" 
        android:textColor="#FFFFFF"
        android:textSize="30sp" 
        android:layout_alignParentLeft="true"
        android:layout_alignParentTop="true" 
        android:paddingLeft="4dp"
        android:paddingTop="4dp" 
    />
    <TextView 
        android:layout_height="wrap_content"
        android:layout_width="wrap_content" 
        android:textColor="#FFFFFF"
        android:layout_alignParentLeft="true"
        android:id="@+id/HoursText"
        android:text="170 hours" 
        android:textSize="23sp"
        android:layout_below="@+id/NameText" 
        android:paddingLeft="4dp" 
    />
</RelativeLayout>

After searching through some other questions, I found these two:

How to wrap content views rather than background drawable?

Scale a Drawable or background image?

Based on this, I created a FrameLayout w/ an ImageView showing the background. Unfortunately, I still can't get it to work. I want the height of the background image to shrink/expand w/ the