C# BitConverter.ToString的Kotlin等价物

import java.util.*

fun toHexString(byteArray: ByteArray): String {
    val hexChars = CharArray(byteArray.size * 2)
    for (i in byteArray.indices) {
        val v = byteArray[i].toInt() and 0xFF
        hexChars[i * 2] = hexArray[v ushr 4]
        hexChars[i * 2 + 1] = hexArray[v and 0x0F]
    }
    return String(hexChars)
}

val hexArray = "0123456789ABCDEF".toCharArray()

fun main() {
    val byteArray = byteArrayOf(0x12, 0x34, 0x56, 0xAB)
    val hexString = toHexString(byteArray)
    println(hexString) // 输出：123456AB
}