[移动开发]Kotlin bye数组与基本数据类型的转换（高位-＞低位、低位-＞高位）

//byte数组转成Int值  由高位到低位
fun byteArrayToInt(params:ByteArray): Int {
   var value = 0
   for (i in 0..3) {
      val shift = (4 - 1 - i) * 8
      value += params[i].toInt() and 0x000000FF shl shift 
   }
   return value
}
//byte数组转成Int值  由低位到高位
fun byteArrayToIntLH(data:ByteArray): Int{
   var count: Int = data[0].toInt() and 0xff
   count = count or (data[1].toInt() and 0xff shl 8)
   count = count or (data[2].toInt() and 0xff shl 16)
   count = count or (data[3].toInt() and 0xff shl 24)
   return count
}
//byte数组转short，高位在前，低位在后
fun byteArrayToShort(param:ByteArray): Short {
   var value = (param[0].toInt() and 0xFF) shl 8
   value = value or (param[1].toInt() and 0xff)
   return value.toShort()
}
//byte数组转short，低位在前，高位在后
fun byteToShortLittle(b: ByteArray): Short {
    return ((b[1].toInt() shl 8) or (b[0].toInt() and 0xff)).toShort()
 }
//byte数组转成Long值  由低位到高位
fun byteArrayToLongLH(param:ByteArray): Long{
    var result = 0L
    for (i in 0..7){
    	result += ((param[i].toLong() and 0xff) shl ((8-1-(7-i))*8))
    }
	return result
}
//byteArray转Long，高位在前，低位在后
fun byteArrayToLong(param:ByteArray): Long{
   var result = 0L
   for (i in 0..7){
      result += ((param[i].toLong() and 0xff) shl ((8-1-i)*8))
    }
    return result
}