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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?
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To convert a byte array to string in Kotlin, use String() constructor. String() constructor can take a Byte Array as argument and return a new string formed with the bytes in the given array.
There are two ways to convert byte array to String: By using String class constructor. By using UTF-8 encoding.
The second one is roughly equivalent to float[] arr2 = new float[12]; . By default, it sets all the values to 0, but you can customize that with FloatArray(12) { 1f } , where 1f can be any number you want to initialize all the items in the array as. You don't need that if you just want to set it to 0 though.
To create a Byte Array in Kotlin, use arrayOf() function. arrayOf() function creates an array of specified type and given elements.
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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