android.support.design.widget.TabLayout select Tab Programmatically

This is because that view is still not initialized properly, and you are trying to perform some action.

As a solution you just need to put one hadler before selecting perticular tab.

new Handler().postDelayed(
    new Runnable(){
        @Override
        public void run() {
            tabLayout.getTabAt(yourTabIndex).select();
        }
}, 100);

This is how I solved it:

tabLayout.getTabAt(CurrentItem).getCustomView().setSelected(true);