Android Question Loading layout into tab how to populate list


Licensed User
in my Main -> Activity_Create I load a layout containing a tabView

On Tab one I load a form
on Tab two I load a customListView

I have created a separate activity module for my customListView, where do I add the code to automatically run and populate the list when the Main activity is started, or do I have to add a custom module and call a function from my Main -> Activity_Create method?