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setUserVisibleHint

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@Override
    public void setUserVisibleHint(boolean isVisibleToUser) {
        super.setUserVisibleHint(isVisibleToUser);
        if (isVisibleToUser){
            //¿É¼û״̬ÏÂ
        }else {
            //²»¿É¼û״̬ÏÂ
        }
       
    }