Question

我创建了一个简单的Adapter。我想在用户点击某个项目时从Activity内启动Adapter。我无法获得context中的onClick。我在onClick课程中执行了MyViewHolder。这是我的适配器代码：

class LeadListAdapter(context:Context, private val leadList: List<Lead>) : RecyclerView.Adapter<LeadListAdapter.MyViewHolder>() {
    var activity:Context = context
    override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): MyViewHolder {
        val inflatedView = parent.inflate(R.layout.custom_lead_row, false)
        return MyViewHolder(inflatedView)
    }

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

    override fun onBindViewHolder(holder: MyViewHolder, position: Int) {
        holder.bindLead(leadList[position])
    }

    class MyViewHolder(v: View) : RecyclerView.ViewHolder(v), View.OnClickListener {
        //2
        private var view: View = v
        private var lead: Lead? = null

        //3
        init {
            v.setOnClickListener(this)
            v.trackButton.setOnClickListener(this)
        }

        //4
        override fun onClick(v: View) {
            val intent = Intent(activity) //Getting error here
        }

        fun bindLead(lead: Lead) {
            this.lead = lead
            view.leadName.text = lead.cusName
            view.leadMobileNumber.text = lead.mobileNo.toString()
            view.loanAmount.text = lead.amount.toString()
            view.leadId.text = "Lead Id: ${lead.id.toString()}"
            view.loanType.text = lead.productType
            view.loanTypeIcon.text = getCharsFromWords(lead.productType)
        }

        private fun getCharsFromWords(productType: String?): String? {
            val words = productType!!.split(Regex("\\s+"))
            val quote: String
            val sb = StringBuilder()
            for (word in words) {
                sb.append(word[0].toString())
            }
            quote = sb.toString()
            return quote
        }

        companion object {
            //5
            private val LEAD_KEY = "LEAD"
        }
    }

}

Answer 1

您在该行收到错误，因为Intents未按此声明。您还需要提供一个java Class作为第二个参数。

有关获取Intent对象的正确方法，请参阅documentation。

修改

关于我的评论，您需要将ViewHolder类声明为内部类。即：

inner class MyViewHolder(holder: View) : RecyclerView.ViewHolder(holder){}

如Kotlin Reference Manual中所述，除非修改为内部类，否则嵌套类将无法访问外部类＆＃39;成员。

如何从kotlin android中的适配器启动活动

1 个答案: