Fragment切换

private void switchFragment(Fragment from, Fragment to) {

 

        if (from == null && to == null){

            return;

        }

        FragmentTransaction fragmentTransaction= fragManager.beginTransaction();

        if (!to.isAdded()) {

           fragmentTransaction.add(R.id.frame_layout, to).hide(from).show(to);

            localFragment = to;

        } else {

           fragmentTransaction.hide(from).show(to);

            localFragment = to;

        }

        fragmentTransaction.commit();

 

    }