AndroidカスタムPopupWindow

class GiftDialog:PopupWindow {

    private var parentView: ViewGroup

    constructor(context:Context,parentView:ViewGroup):super(context){
        this.parentView=parentView
        contentView= LayoutInflater.from(context).inflate(R.layout.dialog_send_challenge,parentView,false)
        initView()
        width= ViewGroup.LayoutParams.MATCH_PARENT
        isOutsideTouchable=false
        setBackgroundDrawable(ColorDrawable(0))
    }

    private fun initView() {
        
    }
}