Android 更新PopupWindow里ContentView中具体的控件【显示，隐藏】

 goodLIbHisKindImg.setImageResource(R.drawable.ic_gray_down)
        mContView = View.inflate(this, R.layout.activity_pop_goodoutlib_layout, null)
        popWindow = PopupWindow(mContView,LinearLayout.LayoutParams.MATCH_PARENT, LinearLayout.LayoutParams.WRAP_CONTENT, true)
        // 在PopupWindow里面就加上下面代码，让键盘弹出时，不会挡住pop窗口。
        popWindow.inputMethodMode = PopupWindow.INPUT_METHOD_NEEDED
        popWindow.softInputMode = WindowManager.LayoutParams.SOFT_INPUT_ADJUST_NOTHING
        popWindow.isOutsideTouchable = true
        popWindow.contentView.measure(ViewUtils.makeDropDownMeasureSpec(popWindow.width), ViewUtils.makeDropDownMeasureSpec(popWindow.height))
        popWindow.showAsDropDown(goodLibHisRel,0,0, Gravity.START)
        val hisAll = popWindow.contentView.findViewById<LinearLayout>(R.id.goodsOutHisAllLin)
         hisAllImg = popWindow.contentView.findViewById(R.id.goodsOutHisAllImg)
         hisAllTv = popWindow.contentView.findViewById<TextView>(R.id.goodsOutHisAllTv)
   hisAll.setOnClickListener {
            handler.sendEmptyMessage(SHOWHISAllIMG)
        }

    private val handler = object: Handler(Looper.getMainLooper()){
        override fun handleMessage(msg: Message?) {
            super.handleMessage(msg)
            when(msg?.what) {
                SHOWHISAllIMG ->{

                    setSelect(hisAllImg,hisAllTv)
                    setNotSelect(hisHandImg, hisHandTv)
                    setNotSelect(hisOrderImg, hisOrderTv)
                    mContView.invalidate()
                    popWindow.update()
                    this.sendEmptyMessageDelayed(DISMISSPOPWINDOW,DISMISSPOPWINDOWTIME)
                }
}