안드로이드 bindingAdapter 관련 질문 있습니다.

Question

ViewModel의 LiveData를 사용해 Recyclerview의 아이템으로 쓰고 있습니다. Databinding을 사용하고 싶어 BindingAdapter를 따로 만들어 연결해 줬습니다. 문제는 LiveData가 바뀌어도 리스트가 뿌려지지 않습니다. lifecyclerOwner를 설정해줬는데 같은 문제가 발생합니다.@JvmStatic @BindingAdapter("adapter") fun RecyclerView.bindAdapter(adapter: RecyclerView.Adapter<*>) { this.adapter = adapter } @JvmStatic @BindingAdapter("tagItems") fun RecyclerView.bindTagItems(tagList: LiveData>) { Timber.d("bindTagItems() tagList: ${tagList.value}") val boundAdapter = this.adapter if (boundAdapter is TagAdapter) { boundAdapter.submitList(tagList.value) } }class EditTagFragment : BaseFragment(R.layout.fragment_edit_tag) { override val viewModel by activityViewModels() private val adapter: TagAdapter by lazy { TagAdapter { tag -> Timber.d("$tag 삭제 클릭") viewModel.removeTag(tag) } } companion object { const val TAG = "EditTagFragment" } override fun onCreateView( inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle? ): View? { Timber.d("EditTagFragment onCreateView()") return super.onCreateView(inflater, container, savedInstanceState) } override fun onViewCreated(view: View, savedInstanceState: Bundle?) { super.onViewCreated(view, savedInstanceState) binding.viewmodel = viewModel binding.fragment = this@EditTagFragment binding.adapter = adapter binding.lifecycleOwner = this@EditTagFragment binding.back.setOnClickListener { findNavController().navigateUp() } } fun onEditorAction(actionId: Int): Boolean { if (actionId == EditorInfo.IME_ACTION_NEXT) { addTag() } return false } fun addTag() { if (binding.editText.text.isBlank()) return viewModel.addTag(binding.editText.text.toString()) binding.editText.text.clear() } override fun onDestroyView() { Timber.d("EditTagFragment onDestroyView()") super.onDestroyView() } }class EditViewModel : BaseViewModel() { private val _photoUri = MutableLiveData() val photoUri: LiveData = _photoUri private val _tagList = MutableLiveData>(mutableListOf()) val tagList: LiveData> = _tagList fun setPhotoUri(uri: Uri) { _photoUri.value = uri } fun addTag(tag: String) { _tagList.value?.add(tag) Timber.d("tagList: ${tagList.value}") } fun removeTag(tag: String) { _tagList.value?.remove(tag) } }class TagAdapter( private val itemClicked: (String) -> Unit ) : ListAdapter(diffCallback) { class TagViewHolder( private val binding: ItemTagBinding ) : RecyclerView.ViewHolder(binding.root) { fun bind(item: String) { binding.textTag.text = item } } override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): TagViewHolder { val layoutInflater = LayoutInflater.from(parent.context) val binding = DataBindingUtil.inflate(layoutInflater, R.layout.item_tag, parent, false) return TagViewHolder(binding).apply { binding.cancel.setOnClickListener { val position = bindingAdapterPosition itemClicked(getItem(position)) } } } override fun onBindViewHolder(holder: TagViewHolder, position: Int) { holder.bind(getItem(position)) } companion object { private val diffCallback = object : DiffUtil.ItemCallback() { override fun areItemsTheSame(oldItem: String, newItem: String): Boolean { return oldItem == newItem } override fun areContentsTheSame(oldItem: String, newItem: String): Boolean { return oldItem == newItem } } } }코드는 위와 같습니다. 혹시 아시는 분 답변 부탁드립니다ㅠㅠㅠ

으헝러헝헝 · Answer

notifyDataSetChanged() 같은 새로고침 메소드는 사용해보셨나요?

안드로이드 bindingAdapter 관련 질문 있습니다.

1개의 답변

#viewmodel 목록