Button Rounded Primary - with selector

btn_rounded_primary.xml

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

btn_rounded_primary_disabled.xml

<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android" android:shape="rectangle">
    <corners android:radius="@dimen/btn_radius_md"/>
    <solid android:color="@color/colorPrimaryDisabled"/>
</shape>

btn_rounded_primary_normal.xml

<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android" android:shape="rectangle">
    <corners android:radius="@dimen/btn_radius_md"/>
    <solid android:color="@color/colorPrimary"/>
</shape>

btn_rounded_primary_pressed.xml

<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android" android:shape="rectangle">
    <corners android:radius="@dimen/btn_radius_md"/>
    <solid android:color="@color/colorPrimaryDark"/>
</shape>