如何在kotlin中存储android共享首选项中的二维数组？

import android.content.Context
import android.content.SharedPreferences

val PREF_NAME = "YourPrefName"
val KEY_ARRAY = "YourArrayKey"
val DEFAULT_ARRAY = emptyArray<Array<Int>>()

fun saveArray(context: Context, array: Array<Array<Int>>) {
    val sharedPrefs: SharedPreferences = context.getSharedPreferences(PREF_NAME, Context.MODE_PRIVATE)
    val editor: SharedPreferences.Editor = sharedPrefs.edit()
    val arrayString = array.joinToString(";") { it.joinToString(",") }
    editor.putString(KEY_ARRAY, arrayString)
    editor.apply()
}

fun getArray(context: Context): Array<Array<Int>> {
    val sharedPrefs: SharedPreferences = context.getSharedPreferences(PREF_NAME, Context.MODE_PRIVATE)
    val arrayString = sharedPrefs.getString(KEY_ARRAY, "") ?: ""
    if (arrayString.isNotEmpty()) {
        val arrayStringList = arrayString.split(";")
        val array = Array(arrayStringList.size) { Array(0) { 0 } }
        for (i in arrayStringList.indices) {
            val rowString = arrayStringList[i]
            val row = rowString.split(",").map { it.toInt() }.toTypedArray()
            array[i] = row
        }
        return array
    }
    return DEFAULT_ARRAY
}

// 存储二维数组
val array = arrayOf(arrayOf(1, 2), arrayOf(3, 4))
saveArray(context, array)

// 获取二维数组
val storedArray = getArray(context)