FragmentTabHost切换Fragment时避免重复加载UI

 1     private View rootView;//缓存Fragment view
 2     
 3     @Override
 4     public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
 5         if(rootView==null){
 6             rootView=inflater.inflate(R.layout.tab_fragment, null);
 7         }
 8  //缓存的rootView需要判断是否已经被加过parent， 如果有parent需要从parent删除，要不然会发生这个rootview已经有parent的错误。
 9         ViewGroup parent = (ViewGroup) rootView.getParent();
10         if (parent != null) {
11             parent.removeView(rootView);
12         } 
13         return rootView;
14     }