如何将 ViewBinding 与 RecyclerView Adapter 与 Kotlin 中现有的内部类一起使用？

Question

TodoAdapter.kt

class TodoAdapter (var todos:List<Todo>) : RecyclerView.Adapter<TodoAdapter.TodoViewHolder>(){

  inner class TodoViewHolder(itemView: View): RecyclerView.ViewHolder(itemView)

  override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): TodoViewHolder {

      val view= LayoutInflater.from(parent.context).inflate(R.layout.todo_layout, parent, false)
      return TodoViewHolder(view)

  }

  override fun onBindViewHolder(holder: TodoViewHolder, position: Int) {
      holder.itemView.apply {
      }

  }

  override fun getItemCount(): Int {
      return todos.size
  }
}

上面是 Recycler View Adapter 类。

我已经有一个内部类 TodoAdapter。我该如何使用 ViewBinding？

我要访问视图的布局文件是 todo_layout.xml

Answer 1

我假设您熟悉 ViewBinding。以下是如何将 ViewBinding 与 RecyclerViewAdapter 一起使用。

这里将是您的TodoAdapter.kt

class TodoAdapter (var todos:List<Todo>) : RecyclerView.Adapter<TodoAdapter.TodoViewHolder>() {

    override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): TodoViewHolder {
        val binding = TodoLayoutBinding.inflate(LayoutInflater.from(parent.context), parent, false)
        return TodoViewHolder(binding)
    }

    override fun onBindViewHolder(holder: TodoViewHolder, position: Int) {
        holder.bind()
    }

    override fun getItemCount(): Int {
        return todos.size
    }

    inner class TodoViewHolder(private val binding: TodoLayoutBinding) : RecyclerView.ViewHolder(binding.root) {
        fun bind(){
            binding.apply{
                // Assign Values
            }
        }
    }
}

现在在您的 TodoViewHolder 绑定函数调用中，您可以访问所有视图。

Answer 2

It shows like this. DataBindingUtil and getRoot() are shown in red. When I hover over it android studio asks me to create class,enum,interface,etc and for getRoot() it shows to create reference and create an extension function

Primary Constructor Call Expected Error on super(binding.root)