title: notifyDataSetChanged() from different fragment
body: <p>I currently have 3 fragments(tabs) and is currently using a viewpager. I have 1 listview for each fragment, and i want to notify the other when something happens, after clicking the view. I tried using the notifyDataSetChanged() on setOnPageChangeListener() on the mainactivity. Problem is, i can see the data being inserted when i change tabs. Since the change happens after changing tabs. </p>