The Facebook Android app has a very cool, I can only assume, PopupWindow(). I really, really struggle with layouts. Any idea how they implemented the popup.xml?

I've tried nesting a couple of LinearLayouts. Their border looks like a 9-patch drawable. Is that even possible?

```
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/outerLinear"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:orientation="vertical"
    android:background="@drawable/darkGrey" >

        <TextView
            android:id="@+id/groupTitle"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="some text" />
    <LinearLayout
        android:id="@+id/innerLinear"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_margin="10dp"
        android:background="@drawable/white"
        android:orientation="vertical" >

        <ListView
            android:id="@+id/listView1"
            android:layout_width="match_parent"
            android:layout_height="wrap_content" >
        </ListView>

    </LinearLayout>

</LinearLayout>

```

![Facebook Friend Requests Popup](https://i.stack.imgur.com/fAGQD.png)