Android开发使用RecyclerView添加点击事件实例详解

implementation 'androidx.recyclerview:recyclerview:1.1.0'

class NewsAdapter(private val newsList: List<NewsInfo>, ): RecyclerView.Adapter<NewsAdapter.ViewHolder>() {
    class ViewHolder(itemView: View) : RecyclerView.ViewHolder(itemView) {
        // ViewHolder
    }
    override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): ViewHolder {
        val view = LayoutInflater.from(parent.context).inflate(R.layout.item_layout, parent, false)
        return ViewHolder(view)
    }
    override fun onBindViewHolder(holder: ViewHolder, position: Int) {
        // 绑定数据
    }
    override fun getItemCount(): Int {
        return myList.size
    }
}

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_marginHorizontal="10dp"
    android:layout_marginTop="10dp"
    android:layout_width="match_parent"
    android:layout_height="wrap_content">
    <TextView
        android:id="@+id/title"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_marginBottom="5dp"
        android:text="title"
        android:textSize="16sp"
        android:textColor="#000000" />
    <ImageView
        android:id="@+id/image"
        android:layout_width="match_parent"
        android:layout_height="200dp" />
    <View
        android:layout_width="match_parent"
        android:layout_height="0.1dp"
        android:layout_marginTop="10dp"
        android:background="#d3d3d3" />
</LinearLayout>

    // 设置LayoutManager，这里选用LinearLayoutManager线性布局作为示例
    recyclerView.layoutManager = LinearLayoutManager(MyApplication.context)
    // 创建适配器
    val newsAdapter = NewsAdapter(newsList)
    // 设置适配器
    recyclerView.adapter = newsAdapter

    //创建OnItemClickListener接口
    interface OnItemClickListener {
        fun onItemClick(position: Int)
    }

    //声明一个mItemClickListener接口
    private var mOnItemClickListener: OnItemClickListener? = null
    //添加setOnItemClickListener方法
    fun setOnItemClickListener(listener: OnItemClickListener?) {
        mOnItemClickListener = listener
    }

    override fun onBindViewHolder(holder: ViewHolder, position: Int) {
        ......
        //给每个Item的点击事件设置回调
        holder.itemView.setOnClickListener {
            mOnItemClickListener?.onItemClick(position)
        }
    }

    val adapter = YourAdapter(YourData)  //适配器
    adapter.setOnItemClickListener(object : YourAdapter.OnItemClickListener {
        override fun onItemClick(position: Int) {
            Toast.makeText(this@YourActivity, "You clicked No.${position} item.", Toast.LENGTH_SHORT).show()
        }
    })