Using Readme example not showing

[Coehill]

I have followed the readme exactly to make the additions to my build.gradle files, synced and made the a layout with the additions:
xmlns:seekarc="http://schemas.android.com/apk/res-auto"

and

<com.triggertrap.seekarc.SeekArc
        android:id="@+id/seekArc"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_gravity="center"
        android:padding="30dp"
        seekarc:rotation="180"
        seekarc:startAngle="30"
        seekarc:sweepAngle="300"
        seekarc:touchInside="true" />

Which are nested in a cardview however absolutely nothing shows up. I have tried going through the readme completely several times now and can't figure out why.

[mreram]

I've upgraded , you can see this repository
https://github.com/mreram/SeekArc