res/drawable/ic_2d.xml

<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
    <item android:drawable="@drawable/ic_2d_b"
          android:state_selected="true" />
    <item android:drawable="@drawable/ic_2d_w" />
</selector>