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

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

Make bookmark icon constant size
Make bookmark icon constant size
