CodexBloom - Programming Q&A Platform

How to implement guide with custom recyclerview adapter and data binding in android 14 - items implementation guide

πŸ‘€ Views: 0 πŸ’¬ Answers: 1 πŸ“… Created: 2025-08-06
android recyclerview databinding Kotlin

I'm working with a question where my custom RecyclerView adapter does not update the item views when the underlying data set changes. I'm using Android 14 with Kotlin and the latest Data Binding library. I have a `RecyclerView` that displays a list of items, and when I update the items in the adapter, the UI doesn't reflect these changes. Here's what I have: ```kotlin class MyAdapter(private var items: List<MyItem>) : RecyclerView.Adapter<MyAdapter.MyViewHolder>() { class MyViewHolder(val binding: ItemBinding) : RecyclerView.ViewHolder(binding.root) { fun bind(item: MyItem) { binding.item = item binding.executePendingBindings() } } override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): MyViewHolder { val inflater = LayoutInflater.from(parent.context) val binding = DataBindingUtil.inflate<ItemBinding>(inflater, R.layout.item_layout, parent, false) return MyViewHolder(binding) } override fun onBindViewHolder(holder: MyViewHolder, position: Int) { holder.bind(items[position]) } override fun getItemCount(): Int = items.size fun updateItems(newItems: List<MyItem>) { this.items = newItems notifyDataSetChanged() // This doesn't seem to trigger a UI update } } ``` When I call the `updateItems()` method after modifying the list, I'm expecting the RecyclerView to refresh, but nothing happens. I'm checking the log, and the method does get called, but I see no updates in the UI. I've tried using `notifyItemRangeChanged()` instead of `notifyDataSetChanged()`, but that also doesn't work. Additionally, I’ve confirmed that the new item list is correctly populated. I’m also using the `DiffUtil` class, which I thought would help, but I'm unsure how to implement that correctly in this context. The logs don’t show any errors, but the UI is just stale. Has anyone encountered this scenario, or does anyone know what could be causing the RecyclerView not to update? Any suggestions or best practices for ensuring that data binding works correctly in this scenario would be greatly appreciated! Has anyone else encountered this?