Problem using your code

[DerekJ70]

Hi, I am a student just finishing up a course on Android app development.

I pasted in the correct line to my Gradle and synced it.
When I paste in your code in the layout xml file, my project wouldn't build successfully.
I managed to guess that I had to add xmlns:custom="com.dd.processbutton"
inside the . It now builds properly.
Any help on what I might have missed would be great.

[FrancisLawlor]

This issue can be rectified by simply adding the following line to your Layout:

xmlns:custom="http://schemas.android.com/apk/res-auto"