WordPress/src/main/res/drawable/calypso_segmented_control_button.xml

<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
    <item android:drawable="@drawable/calypso_segmented_control_selected" android:state_checked="true" android:state_pressed="false" />
    <item android:drawable="@drawable/calypso_segmented_control_normal" android:state_checked="false" android:state_pressed="false" />
    <item android:drawable="@drawable/calypso_segmented_control_selected" android:state_checked="true" android:state_pressed="true" />
    <item android:drawable="@drawable/calypso_segmented_control_normal" android:state_checked="false" android:state_pressed="true" />
</selector>