Do a logic when tab is clicked (before switch to new tab)

I want to do a logic before changing tabs.
In fact, when tab(1) is clicked, logic(1) will be performed.
if logic(1) returns true, tab(2) will be opened, otherwise tab(1) will remain open.

```onPageSelected(position)``` method of ```setOnPageChangeListener``` interface returns new tab position, while I want to do my logic before starting to switch the tabs.

how do I have to do that?