Android Question java.lang.RuntimeException: java.lang.RuntimeException: CustomView CustomType property was not set.

Are you using an old version of B4A? If the field is empty then it means that none of the selected libraries or classes support custom views.

Hi Erel, Thanks for the reply
I am using v5.20
In Visual Designer, Add View. I added CustomView, which created customview1, which appears to be a ListView with added functions.
All the other items I have tried in the Add View work except this one.

I am not sure where to find the library, or how to find what libraries belong to the items

See this tutorial: https://www.b4x.com/android/forum/threads/custom-view-with-designer-support.28953/#content