private void setupViewPager(ViewPager viewPager) {
PagerAdapter adapter = new PagerAdapter(getSupportFragmentManager());
adapter.addFragment(new RouteWalkFragment(), "");
adapter.addFragment(new RouteWalkFragment(), "");
adapter.addFragment(new RouteWalkFragment(), "");
adapter.addFragment(new RouteBusFragment(), "");
viewPager.setAdapter(adapter);
viewPager.setCurrentItem(0);
}