Communicative Between Fragments on Android

Question

I am attempting to build an Android application that has two tabs, one for a textField/button and TreeMenu (where each element has a checkbox associated with it) and another for

Answer 1

I had the same issue a little time ago with an ArrayList and other data. In the end I decided to create a class that extends application and that holds all the global data and can be accessed everywhere from the app. Do you want and example?