viewpager+多个fragment+recycleview 切换来回 会变空白的问题

protected WeakReference mRootView;

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
                         Bundle savedInstanceState) {
    // Inflate the layout for this fragment
    if (mRootView == null || mRootView.get() == null) {
        View view=inflater.inflate(R.layout.fragment_double_eleven_child, null);
        mRootView = new WeakReference(view);
    } else {
        ViewGroup parent = (ViewGroup) mRootView.get().getParent();
        if (parent != null) {
            parent.removeView(mRootView.get());
        }
    }
    return mRootView.get();
}