1.获取选中id以及选中Text

private lateinit var sp_reason_remarks: Spinner
sp_reason_remarks.selectedItemId.toInt()
sp_reason_remarks.selectedItem.toString()

2.选中退出后回显(带其他选项)

private fun setSpinText(spin: Spinner, text: String) {
    for (i in 0 until spin.adapter.count) {
        if (spin.adapter.getItem(i).toString() == text) {
            spin.setSelection(i)
            reason_remarks_other.visibility = View.GONE
            break
        } else if (i == spin.adapter.count - 1) {
            spin.setSelection(i)
            reason_remarks_other.visibility = View.VISIBLE
            reason_remarks_other.setText(text)
        }
    }
}

3.设置监听事件

sp_reason_remarks.onItemSelectedListener = this
override fun onItemSelected(p0: AdapterView<*>?, p1: View?, position: Int, p3: Long) {
  when (position) {
    arr_reason_remarks.size - 1 -> {
      // reason_remarks_other是编辑其他选项内容，选中非其他时隐藏
      reason_remarks_other.visibility = View.VISIBLE 
      reason_remarks_other.setText(reasonRemarksCheck)
    }

    else -> {
      reason_remarks_other.visibility = View.GONE
    }
  }
}

4.绑定适配器

var arr_reason_remarks = resources.getStringArray(R.array.sp_reason_remarks)
val adapter = ArrayAdapter(mContext, R.layout.other_spinner_item_view, arr_reason_remarks)
sp_reason_remarks.adapter = adapter