在 RecyclerView 的适配器中实现的 OnClickListener 不起作用

Posted 2023-04-19

【中文标题】在 RecyclerView 的适配器中实现的 OnClickListener 不起作用

【英文标题】：OnClickListener implemented in Adapter of RecyclerView not working

【发布时间】：2021-04-21 08:41:27

【问题描述】：

我已经为 RecyclerView 实现了以下适配器。我还包含了处理 RecyclerView 项目点击的代码。但是点击监听器不起作用。

class MyListAdapter(private val titles: ArrayList<String>) :
    RecyclerView.Adapter<MyListAdapter.MyViewHolder>() 

    override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): MyViewHolder 
        return MyViewHolder.create(parent)
    

    override fun onBindViewHolder(holder: MyViewHolder, position: Int) 
        holder.bind(titles[position])
    

    class MyViewHolder(itemView: View) : RecyclerView.ViewHolder(itemView),
        View.OnClickListener 
        private val myTextView: TextView = itemView.findViewById(R.id.myTextView)
        
        fun bind(title: String) 
            myTextView.text = title
        

        override fun onClick(v: View) 
            Toast.makeText(itemView.context, "Clicked", Toast.LENGTH_SHORT).show()
        

        companion object 
            fun create(parent: ViewGroup): MyViewHolder 
                val view: View = LayoutInflater.from(parent.context)
                    .inflate(R.layout.rv_row, parent, false)
                return MyViewHolder(view)
            
        
    

【参考方案1】：

在您的视图持有者类中添加以下代码：

init
    itemView.setOnClickListener(this)

因此，最终的适配器将如下所示：

class MyListAdapter(private val titles: ArrayList<String>) :
    RecyclerView.Adapter<MyListAdapter.MyViewHolder>() 

    override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): MyViewHolder 
        return MyViewHolder.create(parent)
    

    override fun onBindViewHolder(holder: MyViewHolder, position: Int) 
        holder.bind(titles[position])
    

    class MyViewHolder(itemView: View) : RecyclerView.ViewHolder(itemView),
        View.OnClickListener 
        private val myTextView: TextView = itemView.findViewById(R.id.myTextView)
        
        init
            itemView.setOnClickListener(this)
        

        fun bind(title: String) 
            myTextView.text = title
        

        override fun onClick(v: View) 
            Toast.makeText(itemView.context, "Clicked", Toast.LENGTH_SHORT).show()
        

        companion object 
            fun create(parent: ViewGroup): MyViewHolder 
                val view: View = LayoutInflater.from(parent.context)
                    .inflate(R.layout.rv_row, parent, false)
                return MyViewHolder(view)