Question

我正在使用改造来收集数据并打印我的recyclerview。我只想单击行中的任何一个，即可打开新活动。但是我在日志中看到，位置值始终为“ -1”。我找不到任何解决方案。对此有任何想法吗？此日志屏幕截图：

这是我的主要活动：

class MainActivity : AppCompatActivity(),MyItemClickListener {
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)

        ApiClient.client?.create(ApiInterface::class.java)?.tumModelleriGetir()
            ?.enqueue(object : Callback<List<AracModel>> {
                override fun onFailure(call: Call<List<AracModel>>, t: Throwable) {
                    Log.e("hata", "" + t?.printStackTrace())
                }
                override fun onResponse(
                    call: Call<List<AracModel>>,
                    response: Response<List<AracModel>>
                ) {
                    Log.e("başarılı", call?.request().url()?.toString())
                    var gelenData = response?.body()
                    var modellist= ArrayList(response.body()!!)
                    rv.layoutManager=LinearLayoutManager(this@MainActivity,LinearLayoutManager.VERTICAL,false)
                    rv.adapter=ModelAdapter(modellist,this@MainActivity)
                    //for (i in 0..response?.body()?.size!! - 1)
                      //  Log.e("başarılı", "" + response?.body()?.get(i)?.model.toString())
                } }) }

    override fun userItemClick(position: Int) {

        Log.e("pozisyon","pozisyon: "+position)
        when(position){

            3->{
                Toast.makeText(this,"deneme",Toast.LENGTH_SHORT).show()
            }
        }
    }
}

这是我的适配器：

class ModelAdapter(var modelliste: List<AracModel>, var context: Context) :
    RecyclerView.Adapter<ModelAdapter.AracModelViewHolder>() {
    private val itemClickListener = context as MyItemClickListener
    //var modellist = ArrayList(response.body()!!)

    var modellist = modelliste
    override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): AracModelViewHolder {

        var inflater = LayoutInflater.from(parent.context)
        var teksatirmodel = inflater.inflate(R.layout.tek_satir_model, parent, false)


        var opelViewHolder = AracModelViewHolder(teksatirmodel)
        teksatirmodel.setOnClickListener {
            itemClickListener.userItemClick(opelViewHolder.adapterPosition)
        }
        return AracModelViewHolder(teksatirmodel)
    }

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

    override fun onBindViewHolder(holder: AracModelViewHolder, position: Int) {
        val oAnolusturulanSatir = modellist.get(position)
        holder.setData(oAnolusturulanSatir, position)
    }
    class AracModelViewHolder(viewGroup: View) : RecyclerView.ViewHolder(viewGroup) {
        var teksatirliste = itemView as CardView
        var modeltitle = teksatirliste.tvListeBaslik

        fun setData(modelliste: AracModel, position: Int) {

            modeltitle.text = modelliste.model }
    }
}

Answer 1

只需如下更改此代码

override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): AracModelViewHolder {
        var inflater = LayoutInflater.from(parent.context)
        var teksatirmodel = inflater.inflate(R.layout.modal_layout, parent, false)

        var opelViewHolder = AracModelViewHolder(teksatirmodel)
        teksatirmodel.setOnClickListener {
            itemClickListener.userItemClick(opelViewHolder.adapterPosition)
        }
        return opelViewHolder
    }

返回opelViewHolder而不是AracModelViewHolder(teksatirmodel)个新对象

Answer 2

viewHolder.adapterPosition是屏幕上的像素位置，而不是数据列表中的位置。而且它并不总是最新的。您应该在视图持有者实现中放入var dataPosition，并在onBindView中进行设置。然后在您的点击监听器中使用它。

Answer 3

您应该将调用绑定到onBindViewHolder中的clickListener上，而不是onCreateViewHolder中，因为可以回收项目并且位置在参数中给出。

override fun onBindViewHolder(holder: AracModelViewHolder, position: Int) {
        val oAnolusturulanSatir = modellist.get(position)
        holder.setData(oAnolusturulanSatir, position)
        holder.itemView.setOnClickListener {
               itemClickListener.userItemClick(position)
        }
}

Answer 4

您可以尝试以下操作。

class ModelAdapter(var modelliste: List<AracModel>, var context: Context) :
    RecyclerView.Adapter<ModelAdapter.AracModelViewHolder>() {
    private val itemClickListener = context as MyItemClickListener
    //var modellist = ArrayList(response.body()!!)

    var modellist = modelliste
    override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): AracModelViewHolder {

        var inflater = LayoutInflater.from(parent.context)
        var teksatirmodel = inflater.inflate(R.layout.tek_satir_model, parent, false)

        return AracModelViewHolder(teksatirmodel)
    }

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

    override fun onBindViewHolder(holder: AracModelViewHolder, position: Int) {
        val oAnolusturulanSatir = modellist.get(position)
        holder.setData(oAnolusturulanSatir, position)
        // her you can set click listener on your item view
        holder.itemView.setOnClickListener {
            itemClickListener.userItemClick(position)
        }
    }
    class AracModelViewHolder(viewGroup: View) : RecyclerView.ViewHolder(viewGroup) {
        var teksatirliste = itemView as CardView
        var modeltitle = teksatirliste.tvListeBaslik

        fun setData(modelliste: AracModel, position: Int) {

            modeltitle.text = modelliste.model }
    }
}

我在Recyclerview的位置总是给我“ -1”

4 个答案: