回收器查看具有数据绑定和视图模型的非法状态异常

Question

>我正在从api获取类别列表并将它们设置为recyclerview。适配器代码在 viewModel 类中编写，由调用 API 的片段调用。以下是设置适配器的方法。

fun getAdapter(
listener: OtherVideoCategoriesRecyclerAdapter.OtherVideoCategoriesRecyclerAdapterListener,context: Context
): OtherVideoCategoriesRecyclerAdapter {
if (categoriesRecyclerAdapter == null)
categoriesRecyclerAdapter = OtherVideoCategoriesRecyclerAdapter(listener,context)
return categoriesRecyclerAdapter as OtherVideoCategoriesRecyclerAdapter
}
fun setItems(categories: ArrayList<OtherCategoriesItem>) {
categoriesList = categories
categoriesRecyclerAdapter!!.setItems(categoriesList!!)
}

这就是我从片段类中调用这些方法的方式。

otherVideoViewModel.setItems(it.first.data!!.otherCategories as ArrayList<OtherCategoriesItem>)

设置适配器方法

private fun setAdapter() {
otherVideosCategoriesBinding.recyclerView.layoutManager = LinearLayoutManager(activity)
otherVideosCategoriesBinding.recyclerView.itemAnimator = DefaultItemAnimator()
adapter = otherVideoViewModel.getAdapter(adapterListener,activity!!)
otherVideosCategoriesBinding.recyclerView.adapter = adapter
}

这就是适配器类。

class OtherVideoCategoriesRecyclerAdapter(private val listener: OtherVideoCategoriesRecyclerAdapterListener,val context: Context): RecyclerView.Adapter<OtherVideoCategoriesRecyclerAdapter.ViewHolder>() {
var categories = ArrayList<OtherCategoriesItem>()
interface OtherVideoCategoriesRecyclerAdapterListener {
fun onItemClicked(position: Int)
}
override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): OtherVideoCategoriesRecyclerAdapter.ViewHolder {
val inflater=LayoutInflater.from(context)
val binding = ItemOtherVideoCategoryBinding.inflate(inflater, parent, false)
return OtherVideoCategoriesRecyclerAdapter.ViewHolder(binding)
}
override fun getItemCount(): Int {
return categories.size
}
override fun onBindViewHolder(holder: OtherVideoCategoriesRecyclerAdapter.ViewHolder, position: Int) {
val item = categories[position]
holder.bindViews(item)
}
class ViewHolder(private val binding: ItemOtherVideoCategoryBinding): RecyclerView.ViewHolder(binding.root) {
fun bindViews(model: OtherCategoriesItem){
binding.model=model
binding.executePendingBindings()
}
}
fun setItems(categoriesList: ArrayList<OtherCategoriesItem>) {
categories = categoriesList
notifyDataSetChanged()
}
}

当我运行此代码时，它崩溃并出现以下异常。

java.lang.IllegalStateException：ViewHolder 视图在创建时不得附加。确保没有将"true"传递给 LayoutInflater.inflate(...， boolean attachToRoot) 的 attachToRoot 参数

我已经尝试了此错误的所有相关答案，但没有一个适用于我的情况，因为其中许多答案不包括数据绑定。

Answer 1

嘿，只是稍微改变了一下你的onCreateViewHolder。试试这个：

override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): OtherVideoCategoriesRecyclerAdapter.ViewHolder {
val inflater=LayoutInflater.from(context)
val binding:ItemOtherVideoCategoryBinding = DataBindingUtil.inflate(inflater,R.layout.your_layout_name, parent, false)
return OtherVideoCategoriesRecyclerAdapter.ViewHolder(binding)
}