fragment巢狀fragment導致裡面fragment介面沒有顯示，例子如下：

private void InitViewPager(View parentView) {
       mPager = (ViewPager) parentView.findViewById(R.id.vPager);
       fragmentsList = new ArrayList<Fragment>();


       fragment1 = new SortHotFragment();
       fragment2 = new SortNewFragment();


       fragmentsList.add(fragment1);
       fragmentsList.add(fragment2);
       
       mPager.setAdapter(new MyFragmentPagerAdapter(getActivity().getSupportFragmentManager(), fragmentsList));
       mPager.setCurrentItem(0);
       mPager.setOnPageChangeListener(new MyOnPageChangeListener());
 }