java.lang.IndexOutOfBoundsException：检测到不一致无效的商品位置40偏移量：40状态：41 androidx.recyclerview.widget.RecyclerView

问题描述

我正在尝试使用齐射要求从RecyclerView中删除一个项目。该请求工作正常，但问题是当我也尝试将其从列表中删除时。我阅读了同一主题的不同文章，但没有找到解决问题的解决方案。我认为是有关使用notifyItemRemoved的，但我不知道具体如何。任何建议，将不胜感激！

这是我的适配器类：

class BooksAdapter(var deleteClickListener: OnDeleteBtnClicked) : RecyclerView.Adapter<BooksAdapter.BooksViewHolder>() {
private var booksList: List<BookItem> = ArrayList()

class BooksViewHolder(itemView: View) : RecyclerView.ViewHolder(itemView) {

    val textviewBookTitle: TextView = itemView.textView_BookTitle
    val textviewBookAuthor: TextView = itemView.textView_BookAuthor
    val textviewBookPublisher: TextView = itemView.textView_BookPublisher
    private val deleteBtn: Button = itemView.deleteBook_btn

    fun delete(bookItem: BookItem,action: OnDeleteBtnClicked) {
        deleteBtn.setOnClickListener {
            action.onDeleteClick(bookItem,adapterPosition)
        }
    }

}

fun setData(list: List<BookItem>) {
    this.booksList = list
    notifyDataSetChanged()
}

override fun onCreateViewHolder(parent: ViewGroup,viewType: Int): BooksViewHolder {
    val itemView = LayoutInflater.from(parent.context).inflate(R.layout.book_item,parent,false)

    return BooksViewHolder(itemView)
}

override fun onBindViewHolder(holder: BooksViewHolder,position: Int) {
    val currentBook = booksList[position]
    holder.textviewBookTitle.text = "Title: " + currentBook.bookTitle
    holder.textviewBookAuthor.text = "Author: " + currentBook.bookAuthor
    holder.textviewBookPublisher.text = "Publisher: " + currentBook.bookPublisher
    holder.delete(booksList[position],deleteClickListener)
}

override fun getItemCount() = booksList.size

interface OnDeleteBtnClicked {
    fun onDeleteClick(bookItem: BookItem,position: Int)
}

}

这是我的片段

class BooksFragment : Fragment(),BooksAdapter.OnDeleteBtnClicked {
    lateinit var booksModel: BooksFragmentViewModel
    var adapter: BooksAdapter = BooksAdapter(this)
    override fun onCreateView(inflater: LayoutInflater,container: ViewGroup?,savedInstanceState: Bundle?): View? {
        return inflater.inflate(R.layout.fragment_books,container,false)
    }

    override fun onViewCreated(view: View,savedInstanceState: Bundle?) {
        booksModel = ViewModelProvider(requireActivity()).get(BooksFragmentViewModel::class.java)
        booksLoading_progressBar.visibility = View.VISIBLE
        var c: Context? = context
        if (c != null) {
            booksModel.setContext(c)
        }

        recyclerView_books.layoutManager = LinearLayoutManager(context)

        booksModel.init()
        booksModel.books.observe(viewLifecycleOwner,Observer {
            if (it != null) {
                adapter.setData(it)
                recyclerView_books.adapter = adapter
                hideProgressBar()
            } else {
                showErrorMessage()
                hideProgressBar()
            }
        })


        booksModel.deletedBook.observe(viewLifecycleOwner,Observer {
            if (booksModel.triggerDeleteBook.value!!) {
                if (it == null) {
                    booksModel.init()
                    booksModel.triggerDeleteBook.value = false
                    booksModel.bookItem = null
                }
            }
        })

        recyclerView_books.setHasFixedSize(true)


        addBook_button.setOnClickListener {
            var addBookFragment = AddBookFragment()
            openAddNewBookFragment(addBookFragment)
        }
        super.onViewCreated(view,savedInstanceState)
    }

    private fun hideProgressBar() {
        booksLoading_progressBar.visibility = View.INVISIBLE
    }

    private fun showErrorMessage() {
        Toast.makeText(context,getString(R.string.getBooksErrorMessage),Toast.LENGTH_SHORT).show()
    }

    private fun openAddNewBookFragment(fragment: Fragment) {
        parentFragmentManager.beginTransaction().apply {
            replace(R.id.main_fragment,fragment).addToBackStack("addBookFrag")
            commit()
        }
    }

    override fun onDeleteClick(bookItem: BookItem,position: Int) {
        booksModel.bookItem = bookItem
        Log.i("MYTAGG",booksModel.bookItem.toString())
        booksModel.triggerDeleteBook.value = true
    }

}

解决方法

暂无找到可以解决该程序问题的有效方法，小编努力寻找整理中！

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