Android - update other tab content from tab?

If you have ListView and list adapter for B tab, You can add item to the list adapter. You can have some global singleton object and share data (lists, adapters) between tabs.

You can store the selected files from TAB A in a local database (or a file, or a static variable, or whatever you want...), and access them when initializing the TAB B.

I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.