Changing background color for TableRows when pressed

I created an xml-file (drawable) for my TableRow layout, which looks like this:

<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://ift.tt/nIICcg">
    <item android:state_pressed="true" >
        <shape>
            <solid
                android:color="#03114e" />
            <stroke
                android:width="1dp"
                android:color="#2f6699" />
            <corners
                android:radius="3dp" />
            <padding
                android:left="10dp"
                android:top="10dp"
                android:right="10dp"
                android:bottom="10dp" />
        </shape>
    </item>
    <item>
        <shape>
            <solid
                android:color="#829fbc" />
            <stroke
                android:width="1dp"
                android:color="#17456b" />
            <corners
                android:radius="3dp" />
            <padding
                android:left="6dp"
                android:top="6dp"
                android:right="6dp"
                android:bottom="6dp" />
        </shape>
    </item>
</selector>

It's actually supposed to change the background of the TableRow when the user touches it. Unfortunately, nothing happens.

The default background (defined between the second item-tag) works perfectly well. However, the state_pressed argument has no use.

I even tried state_focused, but still without use.

Ideas?