FragmentTabHost切换Fragment时避免重复加载UI

时间：2014-05-09 19:11:58 收藏：0 阅读：255

使用FragmentTabHost时，Fragment之间切换时每次都会调用onCreateView方法，导致每次Fragment的布局都重绘，无法保持Fragment原有状态。

解决办法：在Fragment onCreateView方法中缓存View

 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 &nbsp; &nbsp; &nbsp; &nbsp; ViewGroup parent = (ViewGroup) rootView.getParent();
10 &nbsp; &nbsp; &nbsp; &nbsp; if (parent != null) {
11 &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; parent.removeView(rootView);
12 &nbsp; &nbsp; &nbsp; &nbsp; } 
13         return rootView;
14     }

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