Android 如何从RecyclerView适配器读取布尔值

对于我的

RecyclerView

，如何使用

片段中声明的
布尔值来显示或隐藏我的
RecyclerView
项目模板中的各种项目？在我的适配器类中，我尝试使用例如
holder.mIVLanguage.visibility=（myList[position].displaySymbolLanguage）
，但没有成功


回收视图项目数据类

data class Facility (val arrowExpandCollapse: Drawable,
                       val topicSymbol: Drawable,
                       val displaySymbolLanguage: Boolean,
                       val displaySymbolPets: Boolean,
                       val displaySymbolVerifiedUser: Boolean,
                       val displaySymbolTransport: Boolean,
                       val displaySymbolSeating: Boolean,
                       val displaySymbolFingerPrint: Boolean,
                       val displaySymbolArrival: Boolean,
                       val displaySymbolDeparture: Boolean)

class MyFragment : androidx.fragment.app.Fragment() {
    private lateinit var mRecyclerView: RecyclerView

    override fun onCreateView(inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle?): View? {
        return inflater.inflate(R.layout.fragment_rv, container, false)
    }

    override fun onActivityCreated(savedInstanceState: Bundle?) {
        val v = view

        mRecyclerView = v!!.findViewById<RecyclerView>(R.id.my_recyclerview)

        mRecyclerView.layoutManager = LinearLayoutManager(activity, RecyclerView.VERTICAL, false)

        val symbolsArray = intArrayOf(R.drawable.ic_info_black_24dp,
                R.drawable.ic_language_black_24dp,
                R.drawable.ic_pets_black_24dp,
                R.drawable.ic_language_black_24dp,
                R.drawable.ic_pets_black_24dp,
                R.drawable.ic_language_black_24dp,
                R.drawable.ic_pets_black_24dp,
                R.drawable.ic_language_black_24dp,
                R.drawable.ic_pets_black_24dp,
                R.drawable.ic_pets_black_24dp)

        val myList = ArrayList<Facility>()
                     myList.add(Facility(resources.getDrawable(R.drawable.ic_keyboard_arrow_down, null),
                            resources.getDrawable(R.drawable.ic_info_black_24dp, null), true, false, false, false, true, true, true, false))
            }
        }

        val mAdapter = RVAdapterFacilities(myList)

        mRecyclerView.adapter = mAdapter

        super.onActivityCreated(savedInstanceState)
    }
}

class RVAdapterFacilities(val myList: ArrayList<Facility>): RecyclerView.Adapter<RVAdapterFacilities.ViewHolder>() {
    override fun getItemCount(): Int {
        return myList.size
    }

    override fun onBindViewHolder(holder: ViewHolder, position: Int) {      
        holder.mIVExpandCollapse.setImageDrawable(myList[position].arrowExpandCollapse)

        holder.mIVTopic.setImageDrawable(myList[position].topicSymbolol)

        holder.mIVLanguage.visibility = ¿What goes here?                  
        holder.mIVPets.visibility = ¿What goes here?
        holder.mIVVerifiedUser.visibility = ¿What goes here?                  
        holder.mIVTransport.visibility = ¿What goes here?
        holder.mIVSeat.visibility = ¿What goes here?                  
        holder.mIVFingerprint.visibility = ¿What goes here?
        holder.mIVDeparture.visibility = ¿What goes here?                  
        holder.mIVArrival.visibility = ¿What goes here?
    }

    override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): ViewHolder {
        val v = LayoutInflater.from(parent.context).inflate(R.layout.cv_facility_information, parent, false)
        return ViewHolder(v)
    }

    class ViewHolder (itemView : View):RecyclerView.ViewHolder(itemView) {
        val mCV = itemView.findViewById<CardView>(R.id.cv_facilities)
        val mIVExpandCollapse = itemView.findViewById<ImageView>(R.id.iv_expandcollapsearrow)!!
        val mIVTopic = itemView.findViewById<ImageView>(R.id.iv_topicsymbol)!!
        val mLLSymbols = itemView.findViewById<LinearLayout>(R.id.ll_symbols)!!
    }
}

回收视图片段类

data class Facility (val arrowExpandCollapse: Drawable,
                       val topicSymbol: Drawable,
                       val displaySymbolLanguage: Boolean,
                       val displaySymbolPets: Boolean,
                       val displaySymbolVerifiedUser: Boolean,
                       val displaySymbolTransport: Boolean,
                       val displaySymbolSeating: Boolean,
                       val displaySymbolFingerPrint: Boolean,
                       val displaySymbolArrival: Boolean,
                       val displaySymbolDeparture: Boolean)

class MyFragment : androidx.fragment.app.Fragment() {
    private lateinit var mRecyclerView: RecyclerView

    override fun onCreateView(inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle?): View? {
        return inflater.inflate(R.layout.fragment_rv, container, false)
    }

    override fun onActivityCreated(savedInstanceState: Bundle?) {
        val v = view

        mRecyclerView = v!!.findViewById<RecyclerView>(R.id.my_recyclerview)

        mRecyclerView.layoutManager = LinearLayoutManager(activity, RecyclerView.VERTICAL, false)

        val symbolsArray = intArrayOf(R.drawable.ic_info_black_24dp,
                R.drawable.ic_language_black_24dp,
                R.drawable.ic_pets_black_24dp,
                R.drawable.ic_language_black_24dp,
                R.drawable.ic_pets_black_24dp,
                R.drawable.ic_language_black_24dp,
                R.drawable.ic_pets_black_24dp,
                R.drawable.ic_language_black_24dp,
                R.drawable.ic_pets_black_24dp,
                R.drawable.ic_pets_black_24dp)

        val myList = ArrayList<Facility>()
                     myList.add(Facility(resources.getDrawable(R.drawable.ic_keyboard_arrow_down, null),
                            resources.getDrawable(R.drawable.ic_info_black_24dp, null), true, false, false, false, true, true, true, false))
            }
        }

        val mAdapter = RVAdapterFacilities(myList)

        mRecyclerView.adapter = mAdapter

        super.onActivityCreated(savedInstanceState)
    }
}

class RVAdapterFacilities(val myList: ArrayList<Facility>): RecyclerView.Adapter<RVAdapterFacilities.ViewHolder>() {
    override fun getItemCount(): Int {
        return myList.size
    }

    override fun onBindViewHolder(holder: ViewHolder, position: Int) {      
        holder.mIVExpandCollapse.setImageDrawable(myList[position].arrowExpandCollapse)

        holder.mIVTopic.setImageDrawable(myList[position].topicSymbolol)

        holder.mIVLanguage.visibility = ¿What goes here?                  
        holder.mIVPets.visibility = ¿What goes here?
        holder.mIVVerifiedUser.visibility = ¿What goes here?                  
        holder.mIVTransport.visibility = ¿What goes here?
        holder.mIVSeat.visibility = ¿What goes here?                  
        holder.mIVFingerprint.visibility = ¿What goes here?
        holder.mIVDeparture.visibility = ¿What goes here?                  
        holder.mIVArrival.visibility = ¿What goes here?
    }

    override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): ViewHolder {
        val v = LayoutInflater.from(parent.context).inflate(R.layout.cv_facility_information, parent, false)
        return ViewHolder(v)
    }

    class ViewHolder (itemView : View):RecyclerView.ViewHolder(itemView) {
        val mCV = itemView.findViewById<CardView>(R.id.cv_facilities)
        val mIVExpandCollapse = itemView.findViewById<ImageView>(R.id.iv_expandcollapsearrow)!!
        val mIVTopic = itemView.findViewById<ImageView>(R.id.iv_topicsymbol)!!
        val mLLSymbols = itemView.findViewById<LinearLayout>(R.id.ll_symbols)!!
    }
}

classmyfragment:androidx.fragment.app.fragment（）{
私有lateinit var mRecyclerView:RecyclerView
覆盖创建视图（充气机：布局充气机，容器：ViewGroup？，savedInstanceState:Bundle？）：视图{
返回充气机。充气（右布局图。碎片_rv，容器，假）
}
覆盖活动创建的乐趣（savedInstanceState:Bundle？）{
val v=视图
mRecyclerView=v！！.findViewById（R.id.my\u recyclerview）
mRecyclerView.layoutManager=LinearLayoutManager（活动，RecyclerView.VERTICAL，false）
val SYMBOLSRARY=intArrayOf（R.drawable.ic\U info\U black\U 24dp，
R.drawable.ic_语言_黑色_24dp，
R.drawable.ic_宠物_黑色_24dp，
R.drawable.ic_语言_黑色_24dp，
R.drawable.ic_宠物_黑色_24dp，
R.drawable.ic_语言_黑色_24dp，
R.drawable.ic_宠物_黑色_24dp，
R.drawable.ic_语言_黑色_24dp，
R.drawable.ic_宠物_黑色_24dp，
R.drawable.ic_宠物_黑色_24dp）
val myList=ArrayList（）
添加（Facility（resources.getDrawable（R.drawable.ic\u keyboard\u arrow\u down，null），
getDrawable（R.drawable.ic_info_black_24dp，null），真，假，假，假，真，真，真，假）
}
}
val mAdapter=RVADAPTER设施（myList）
mRecyclerView.adapter=mAdapter
super.onActivityCreated（savedInstanceState）
}
}

RecyclerView适配器类

data class Facility (val arrowExpandCollapse: Drawable,
                       val topicSymbol: Drawable,
                       val displaySymbolLanguage: Boolean,
                       val displaySymbolPets: Boolean,
                       val displaySymbolVerifiedUser: Boolean,
                       val displaySymbolTransport: Boolean,
                       val displaySymbolSeating: Boolean,
                       val displaySymbolFingerPrint: Boolean,
                       val displaySymbolArrival: Boolean,
                       val displaySymbolDeparture: Boolean)

class MyFragment : androidx.fragment.app.Fragment() {
    private lateinit var mRecyclerView: RecyclerView

    override fun onCreateView(inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle?): View? {
        return inflater.inflate(R.layout.fragment_rv, container, false)
    }

    override fun onActivityCreated(savedInstanceState: Bundle?) {
        val v = view

        mRecyclerView = v!!.findViewById<RecyclerView>(R.id.my_recyclerview)

        mRecyclerView.layoutManager = LinearLayoutManager(activity, RecyclerView.VERTICAL, false)

        val symbolsArray = intArrayOf(R.drawable.ic_info_black_24dp,
                R.drawable.ic_language_black_24dp,
                R.drawable.ic_pets_black_24dp,
                R.drawable.ic_language_black_24dp,
                R.drawable.ic_pets_black_24dp,
                R.drawable.ic_language_black_24dp,
                R.drawable.ic_pets_black_24dp,
                R.drawable.ic_language_black_24dp,
                R.drawable.ic_pets_black_24dp,
                R.drawable.ic_pets_black_24dp)

        val myList = ArrayList<Facility>()
                     myList.add(Facility(resources.getDrawable(R.drawable.ic_keyboard_arrow_down, null),
                            resources.getDrawable(R.drawable.ic_info_black_24dp, null), true, false, false, false, true, true, true, false))
            }
        }

        val mAdapter = RVAdapterFacilities(myList)

        mRecyclerView.adapter = mAdapter

        super.onActivityCreated(savedInstanceState)
    }
}

class RVAdapterFacilities(val myList: ArrayList<Facility>): RecyclerView.Adapter<RVAdapterFacilities.ViewHolder>() {
    override fun getItemCount(): Int {
        return myList.size
    }

    override fun onBindViewHolder(holder: ViewHolder, position: Int) {      
        holder.mIVExpandCollapse.setImageDrawable(myList[position].arrowExpandCollapse)

        holder.mIVTopic.setImageDrawable(myList[position].topicSymbolol)

        holder.mIVLanguage.visibility = ¿What goes here?                  
        holder.mIVPets.visibility = ¿What goes here?
        holder.mIVVerifiedUser.visibility = ¿What goes here?                  
        holder.mIVTransport.visibility = ¿What goes here?
        holder.mIVSeat.visibility = ¿What goes here?                  
        holder.mIVFingerprint.visibility = ¿What goes here?
        holder.mIVDeparture.visibility = ¿What goes here?                  
        holder.mIVArrival.visibility = ¿What goes here?
    }

    override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): ViewHolder {
        val v = LayoutInflater.from(parent.context).inflate(R.layout.cv_facility_information, parent, false)
        return ViewHolder(v)
    }

    class ViewHolder (itemView : View):RecyclerView.ViewHolder(itemView) {
        val mCV = itemView.findViewById<CardView>(R.id.cv_facilities)
        val mIVExpandCollapse = itemView.findViewById<ImageView>(R.id.iv_expandcollapsearrow)!!
        val mIVTopic = itemView.findViewById<ImageView>(R.id.iv_topicsymbol)!!
        val mLLSymbols = itemView.findViewById<LinearLayout>(R.id.ll_symbols)!!
    }
}

class-rvadapterfaccility（val-myList:ArrayList）：RecyclerView.Adapter（）{
重写getItemCount（）：Int{
返回myList.size
}
覆盖onBindViewHolder（holder:ViewHolder，position:Int）{
holder.mIVExpandCollapse.setImageDrawable（myList[position].arrowExpandCollapse）
holder.mIVTopic.setImageDrawable（myList[position].TopicSymbol）
holder.mIVLanguage.visibility=？这里是什么？
holder.mIVPets.visibility=？这里是什么？
holder.mIVVerifiedUser.visibility=？这里是什么？
holder.mIVTransport.visibility=？这里是什么？
holder.mIVSeat.visibility=？这里是什么？
holder.mIVFingerprint.visibility=？这里是什么？
holder.mIVDeparture.visibility=？这里是什么？
holder.mIVArrival.visibility=？这里是什么？
}
override onCreateViewHolder（父级：ViewGroup，viewType:Int）：ViewHolder{
val v=LayoutFlater.from（parent.context）。充气（R.layout.cv\u facility\u信息，parent，false）
返回视窗支架（v）
}
类ViewHolder（itemView:View）：RecyclerView.ViewHolder（itemView）{
val mCV=itemView.findviewbyd（R.id.cv_设施）
val mIVExpandCollapse=itemView.findviewbyd（R.id.iv_expandcollapsarrow）！！
val mIVTopic=itemView.findViewById（R.id.iv_topicsymbol）！！
val mLLSymbols=itemView.findviewbyd（R.id.ll_符号）！！
}
}
可用于设置视图可见性的选项有
可见
、
不可见
和
消失
。在您的情况下，您可能希望根据布尔值设置
可见
或
消失
：

holder.mIVLanguage.visibility = if (myList[position].displaySymbolLanguage) View.VISIBLE else View.GONE

正如我在评论中所说，可见性需要int，而不是boolean

您只需检查
（myList[position].displaySymbolLanguage）
的值，然后决定是将
mIVLanguage
View.VISIBLE还是View.GONE。下面是我要说的：

holder.mIVLanguage.visibility = if(myList[position].displaySymbolLanguage) View.VISIBLE else View.GONE

我希望这有帮助。。快乐的编码
 可见性需要整数，而不是布尔值。@我刚刚回滚了您的编辑。虽然
表达式非常好，但在布尔值上使用它们过于冗长，不会产生任何好处。