Android Kotlin：在适配器中对数据进行排序并保持翻译

Question

我正在使用以下适配器创建微调器下拉菜单。我的适配器只为每个项目显示一个文本。此项目已翻译。此代码运行良好，但最后微调器包含未按字母顺序排序的值。

如何修改代码以对数据进行排序并保留翻译？

Activity.kt:

val spinner: Spinner = findViewById(R.id.units_cars)
val carsArray = resources.getStringArray(R.array.cars_array)
spinner.adapter = CarsDropdownAdapter(this, carsArray)

汽车-array.xml:

<?xml version="1.0" encoding="utf-8"?>
<resources>
    <string-array name="units_array">
        <item>CAR_LABEL1</item>
        <item>CAR_LABEL2</item>
        <item>CAR_LABEL3</item>
    </string-array>
</resources>

CarsDropdownAdapter.kt:

class CarsDropdownAdapter(ctx: Context, private val cars: Array<String>) : ArrayAdapter<String>(ctx, 0, cars) {

    override fun getView(position: Int, recycledView: View?, parent: ViewGroup): View {
        return this.createView(position, recycledView, parent)
    }

    override fun getDropDownView(position: Int, recycledView: View?, parent: ViewGroup): View {
        return this.createView(position, recycledView, parent)
    }

    private fun createView(position: Int, recycledView: View?, parent: ViewGroup): View {
        val carLabel = getItem(position)
        val view = recycledView ?: LayoutInflater.from(parent.context).inflate(R.layout.item_car_dropdown, parent, false)

        // Used to get the translation but at the end the spinner contains Data that are not sorted alphabetically !
        view.car_name_dropdown.text = context.getString(parent.context.resources.getIdentifier(carLabel, "string", context?.packageName))

        return view
    }

}

Answer 1

您可以在创建适配器之前对字符串数组进行排序：

val spinner: Spinner = findViewById(R.id.units_cars)
val carsArray = resources.getStringArray(R.array.cars_array)
carsArray.sort()
spinner.adapter = CarsDropdownAdapter(this, carsArray)

字符串的 sort 实现按字母顺序对它们进行排序

Answer 2

使用以下代码：

val spinner: Spinner = findViewById(R.id.units_cars)
val carsArray = resources.getStringArray(R.array.cars_array)
Collections.sort(carsArray)
spinner.adapter = CarsDropdownAdapter(this, carsArray)

第 Collections.sort(carsArray) 行将按字母顺序对数组进行排序。

Android Kotlin：在适配器中对数据进行排序并保持翻译

Android Kotlin : Sort data in adapter and keeping translation

android

android-arrayadapter

kotlin