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

[BigGitWorld]

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?