学步园

FragmentManager manager = getFragmentManager();
		FragmentTransaction transation = manager.beginTransaction();
		FragmentA fra = new FragmentA();
		transation.replace(R.id.ring_main_type_f, fra);
		transation.addToBackStack(null);
		transation.setTransition(FragmentTransaction.TRANSIT_FRAGMENT_OPEN);
		transation.commit();