android FragmentTabHost切換Fragment時避免UI重新加載

private View rootView;// 緩存Fragment view

  @Override
  public View onCreateView(LayoutInflater inflater, ViewGroup container,
      Bundle savedInstanceState)
  {
    Log.i(TAG, "onCreateView");

    if (rootView == null)
    {
      rootView = inflater.inflate(R.layout.fragment_1, null);
    }
    // 緩存的rootView需要判斷是否已經被加過parent，如果有parent需要從parent刪除，要不然會發生這個rootview已經有parent的錯誤。
    ViewGroup parent = (ViewGroup) rootView.getParent();
    if (parent != null)
    {
      parent.removeView(rootView);
    }
    return rootView;
  }