我找不到解决方案:我想在Spinner上显示提示文本,但设置的适配器仅接受枚举类型(IdentityType枚举),因此无法向其添加字符串(用于提示)< / p>
您还有使用适配器中的枚举的解决方案吗?
private fun initDriverIdentityTypeSpinner() {
driverIdentityTypeSpinner.adapter = object : ArrayAdapter<IdentityType>(context!!, android.R.layout.simple_spinner_item,IdentityType.values()) {
override fun getDropDownView(position: Int, convertView: View?, parent: ViewGroup): View =
(super.getDropDownView(position, convertView, parent) as CheckedTextView).also{
it.setText(getItem(position)!!.stringRes())
}
override fun getView(position: Int, convertView: View?, parent: ViewGroup) =
(super.getView(position, convertView, parent) as TextView).also {
it.setText(getItem(position)!!.stringRes())
}
override fun isEnabled(position: Int): Boolean = position != 0
}.also {
it.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item)
}
}
//IdentityType Extension
@StringRes
fun IdentityType.stringRes(): Int {
return when(this) {
IdentityType.DRIVING_LICENSE -> R.string.driving_license
IdentityType.ID_CARD -> R.string.id_card
IdentityType.PASSPORT -> R.string.passport
}
}
答案 0 :(得分:0)
在Kotlin中,可以将属性放入枚举(在这里称为枚举类)。您可以在构造函数中定义它,如下所示:
enum class IdentityType(val stringResId: Int) {
DRIVING_LICENSE(R.string.driving_license),
ID_CARD(R.string.id_card),
PASSPORT(R.string.passport)
}
然后,您可以像使用它是类的通用属性一样使用它。
val type: IdentityType = ...
val string = getString(type.stringResId)