SmartRefreshLayout class is not found when i try to use the custom view in the xml layout. Most likely an android x issue.

Caused by: java.lang.ClassNotFoundException: com.scwang.smartrefresh.layout.SmartRefreshLayout
        at java.lang.Class.classForName(Native Method)
        at java.lang.Class.forName(Class.java:454)
        at android.view.LayoutInflater.createView(LayoutInflater.java:815)
        at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:1006)
        at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:961)
        at android.view.LayoutInflater.inflate(LayoutInflater.java:659)

The sample app is not implemented the same way as the setup instructions. Would be very helpful to have the sample app support android x. Otherwise it will be further and further out of date. Thanks and the pull to refresh components are impressive, hope i can use one day :)