android - java.lang.ClassCastException : CustomAdapter cannot be cast to android. widget.ArrayAdapter 在 Kotlin

Question

当我尝试在 Kotlin 中创建自定义适配器类时出现上述错误

源代码

MainActivity.kt

 var adapterC:CustomAdapter = CustomAdapter(this,Statearray)
 spinnerState.adapter=adapterC

CustomAdapter.kt

class CustomAdapter(val activity: Activity,val array:JSONArray) : BaseAdapter(), ListAdapter
{
    lateinit var ItemName: TextView

    override fun getView(position: Int, convertView: View?, parent: ViewGroup?): View? {
    var view=convertView
    if (view == null)
        view = activity.layoutInflater.inflate(R.layout.spinnerlayout, null)
    try {

        ItemName = view?.findViewById(R.id.ItemName) as TextView
        val obj = array.getJSONObject(position)
        ItemName.setText(obj.getString("Name"))
        view.setTag(obj.getString("Id"))

    } catch ( e:JSONException) {
        Log.e("At Custom Class",e.toString())
    }

    return view
}

override fun getItem(position: Int): JSONObject {
    return array.optJSONObject(position)
}

override fun getItemId(position: Int): Long {
    var jsonObject=getItem(position)
    return jsonObject.optLong("id")
}

override fun getCount(): Int {
    return array.length()
}

}

需要帮助我不知道我做错了什么。

Answer 1

我终于弄明白了..问题是，我使用的是仅支持 ArrayAdapter 的微调器库

我使用的库是

com.toptoche.searchablespinner:searchablespinnerlibrary:1.3.1

它只支持数组适配器