ByteArray在Kotlin中浮动 [英] ByteArray to Float in kotlin

问题描述

我有一个4字节的数组，代表一个浮点值.由于kotlin缺少Byte的按位运算，如何将其以最佳方式转换为float?

I have a 4 bytes array which represent a float value. Since kotlin lack of bitwise operations for Byte how can I convert it to float in most optimal way?

推荐答案

您可以使用Java NIO

You can use the Java NIO ByteBuffer, it has the getFloat() and getFloat(index) functions for that:

val bytes = byteArrayOf(1, 2, 3, 4)

val buffer = ByteBuffer.wrap(bytes)
val float1 = buffer.getFloat()  // Uses current position and increments it by 4
val float2 = buffer.getFloat(0) // Uses specified position

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