DataBinding with RecyclerView in Android: Item implementation guide on Data Change
I'm upgrading from an older version and I'm refactoring my project and I'm stuck on something that should probably be simple... Quick question that's been bugging me - Quick question that's been bugging me - I'm working with an scenario where the items in my RecyclerView are not updating correctly when the underlying data changes... I'm using DataBinding with a ViewModel and LiveData for observing the data changes. My RecyclerView is set up with a ListAdapter, and I've noticed that while my data changes trigger the ViewModel correctly, the UI does not reflect these changes. Here's a snippet of how I've set up my ViewModel and RecyclerView: ```kotlin class MyViewModel : ViewModel() { private val _items = MutableLiveData<List<MyItem>>() val items: LiveData<List<MyItem>> = _items fun updateItems(newItems: List<MyItem>) { _items.value = newItems } } ``` In my Fragment, I'm observing the items LiveData: ```kotlin viewModel.items.observe(viewLifecycleOwner, { itemsList -> adapter.submitList(itemsList) }) ``` And my adapter looks like this: ```kotlin class MyAdapter : ListAdapter<MyItem, MyViewHolder>(MyItemDiffCallback()) { override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): MyViewHolder { val binding = DataBindingUtil.inflate<ItemBinding>(LayoutInflater.from(parent.context), R.layout.item_layout, parent, false) return MyViewHolder(binding) } override fun onBindViewHolder(holder: MyViewHolder, position: Int) { holder.bind(getItem(position)) } } ``` My scenario is that when I call `updateItems(newItems)` from my activity, the log confirms that `items` in the ViewModel is updated, but the UI does not reflect this change. The adapter’s `submitList` method is supposed to handle diffing automatically. I’ve even tried calling `notifyDataSetChanged()` after `submitList`, but that doesn’t help. I suspect it might be an scenario with how the data is structured or how the ListAdapter is handling updates. Any insights on what might be going wrong? I'm using AndroidX libraries version 1.5.0 and Kotlin version 1.7.0. I'm working on a API that needs to handle this. How would you solve this? My development environment is Ubuntu 20.04. Any pointers in the right direction? Could this be a known issue?