尝试使用您的BottomNavigationView的setSelectedItemId()方法，如下所示

try this use setSelectedItemId() method of your BottomNavigationView like this

BottomNavigationView bottomNavigationView;
bottomNavigationView = (BottomNavigationView) findViewById(R.id.bottomNavigationView);
bottomNavigationView.setSelectedItemId(R.id.home_menu);

或像这样使用您的视图寻呼机的viewPager.setCurrentItem();

or use viewPager.setCurrentItem(); of your view pager like this

viewPager.setCurrentItem(2);