open class MyBaseFragment : Fragment() {
    var rootView : View? = null
    var mActivity : Activity? = null

    fun initView(inflater: LayoutInflater, container: ViewGroup?, resource :Int) : View?{
        if (rootView == null) {
            // Inflate the layout for this fragment
            mActivity = super<Fragment>.getActivity()
            rootView = inflater.inflate(resource, container, false);
        } else {
            // Do not inflate the layout again.
            // The returned View of onCreateView will be added into the fragment.
            // However it is not allowed to be added twice even if the parent is same.
            // So we must remove _rootView from the existing parent view group
            // (it will be added back).
            (rootView?.getParent() as ViewGroup?)?.removeView(rootView!!);
        }
        return rootView;
    }
}