Start an Activity from an item in the bottom navigation (menu bar)

Question

I have the Activity main and a bottom bar navigation with 4 items. When I start the application, it starts, shows the Activity of the first item. I wanted to make it "start" from item 3. Is it possible to do this? How?

Answer 1

Statement:

AHBottomNavigationViewPager viewPagerBottom;
AHBottomNavigation bottomNavigation;

To start on the chosen Fragment do this on Oncreate or where it has already identified the items:

viewPagerBottom.setCurrentItem(posição);

To follow the selection of the corresponding button you do:

bottomNavigation.setCurrentItem(posição);