AArkiwi/res/drawable-hdpi/pl_backward.xml

<selector xmlns:android="http://schemas.android.com/apk/res/android">
    <item android:drawable="@drawable/pli_btn_backward_pressed"
        android:state_focused="true"
        android:state_pressed="true" />
    <item android:drawable="@drawable/pli_btn_backward_pressed"
        android:state_focused="false"
        android:state_pressed="true" />
    <item android:drawable="@drawable/pli_btn_backward_pressed"
         android:state_focused="true" />
    <item android:drawable="@drawable/pli_btn_backward"
        android:state_focused="false"
        android:state_pressed="false" />
</selector>