中国大学MOOC: 下面代码用于打开一个SummaryFragment对象，请补充完整：SummaryFragment f = new SummaryFragment();FragmentManager manger = getSupportFragmentManager();manger.beginTransaction().replace(R.id.layoutContent, ).commit();

5 TitleFragment中访问ContentFragment的方法，请补全下列代码？ContentFragment mContentFragment=(ContentFragment)getActivity(). ( ？ ）.findFragmentById(R.id.fragment_content); mContentFragment.setData(strTitle,strContent); A: getSupportManager() B: getManager() C: getFrament() D: getSupportFragmentManager()

7 Fragment可以实现动态加载，下面是实现动态加载的过程，请补全代码？private void replaceFragment(int layout,Fragment fragment){ FragmentManager manager=getSupportFragmentManager(); FragmentTransaction fragmentTransaction=manager.beginTransaction(); fragmentTransaction.replace(layout,fragment); fragmentTransaction.addToBackStack(null); ( ？ ); } A: fragmentTransaction.getFragmentById() B: fragmentTransaction.getAcitivity() C: fragmentTransaction.commitFragment() D: fragmentTransaction.commit()