如何更新适配器数据列表？

Question

我在 recyclerView 适配器中更新我的数据列表时遇到问题，

我正在调用 webservice 来获取 main.activity 中的数据列表，如下所示：

private fun get_company_name(){
    val request = buildService(ApiInterface::class.java)
    val call = request.getCompanyList()

    call.enqueue(object : Callback<List<CompanyModel>>{
        override fun onResponse(call: Call<List<CompanyModel>>, response: Response<List<CompanyModel>>) {
            if (response.isSuccessful){
                indeterminateBar.visibility = View.INVISIBLE
                frg_holder.apply {
                    setHasFixedSize(true)
                    layoutManager = LinearLayoutManager(this@MainActivity)
                    adapter = DidebanAdapter(response.body()!!)
                }
            }
        }

        override fun onFailure(call: Call<List<CompanyModel>>, t: Throwable) {
            indeterminateBar.visibility = View.INVISIBLE
        }

    })
}

这是我的适配器：

class DidebanAdapter(val didebans: List<CompanyModel>): RecyclerView.Adapter<DidebanViewHolder>() {
    override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): DidebanViewHolder {
        val view = LayoutInflater.from(parent.context).inflate(R.layout.fragment_dideban, parent, false)
        return DidebanViewHolder(view)
    }



    override fun getItemCount(): Int {
        return didebans.size
    }

    override fun onBindViewHolder(holder: DidebanViewHolder, position: Int) {

        holder.itemView.delete_dideban.setOnClickListener(View.OnClickListener { view ->
            val id : Int = holder.itemView.dideban_id.text.toString().toInt();
            val request = ApiClient.buildService(ApiInterface::class.java)
            val call = request.deleteCompany(id)

            call.enqueue(object : Callback<Boolean> {
                override fun onResponse(call: Call<Boolean>, response: Response<Boolean>) {
                    notifyItemRemoved(position)
                }

                override fun onFailure(call: Call<Boolean>, t: Throwable) {
                    Log.e("msg","false")
                }


            })
        })

        return holder.bind(didebans[position])
    }
}

class DidebanViewHolder(itemView : View): RecyclerView.ViewHolder(itemView){
    private val title:TextView = itemView.findViewById(R.id.dideban_name)
    private val dideban_id:TextView = itemView.findViewById(R.id.dideban_id)

    fun bind(dideban: CompanyModel) {
        title.text = dideban.Title
        dideban_id.text = dideban.Id.toString()
    }

}

在 onBindViewHolder 函数中，我为单击的删除图像设置了操作，它调用另一个 Web 服务并从数据库中删除项目，它工作正常，但我希望我的适配器在项目被删除时更新。 我使用 notifyItemRemoved(position)，但它无法按需更新我的列表。

Answer 1

在notifyItemRemoved(position) 之前，您应该手动从列表中删除元素（适配器不会为您这样做）didebans.remove(position)