March 19, 2024 - val concatenatedArray = ByteArray(byteArray.size + bytesToAdd.size) byteArray.copyInto(concatenatedArray) bytesToAdd.copyInto(concatenatedArray, destinationOffset = byteArray.size) We must note that we don’t need to specify the destinationOffset argument for the first copy operation, as the default offset is 0. However, we need to explicitly specify the destinationOffset for the subsequent copy operations to ensure we don’t override existing bytes. Since Kotlin is fully interoperable with Java, we can use Java classes and libraries to solve our use case.

kotlin-stdlib/kotlin/ByteArray · CommonJSJVMNativeWasm-JSWasm-WASI · expect class ByteArray(size: Int)(source) An array of bytes. When targeting the JVM, instances of this class are represented as byte[]. See Kotlin language documentation ...

October 13, 2012 - I am trying to convert the Java method below into Kotlin one and I have dificulties doing so. Issues are commented at the end of every troubled line. Any hint or idea will do Java code: public static ByteArrayOutputStream convert(InputStream stream) { final ByteArrayOutputStream out = new ByteArrayOutputStream(8192); byte buffer = new byte[8192]; int length; try { while ((length = stream.read(buffer)) > 0) { out.write(buffer, 0, length); } out.flush(); ...

October 17, 2024 - The ByteArray() constructor is the simplest way to create a new byte array in Kotlin. When you initialize a byte array using this constructor, you need to specify the size of the array, which determines how many bytes it will hold.

Represents an array (specifically, a Java array when targeting the JVM platform). Array instances can be created using the arrayOf, arrayOfNulls and emptyArray standard library functions. See Kotlin language documentation for more information on arrays.

... Returns an array of Byte containing all of the elements of this collection. ... Returns an array of type ByteArray, which is a copy of this array where each element is a signed reinterpretation of the corresponding element of this array.

March 11, 2024 - The Kotlin language provides a straightforward solution for this case. The String class provides a toByteArray() method. It converts the String object to a byte array object. Moreover, it converts the object using the UTF-8 Charset.

kotlin-stdlib/kotlin.collections/toByteArray · fun Array<out Byte>.toByteArray(): ByteArray(source) Returns an array of Byte containing all of the elements of this generic array.

January 31, 2024 - A quick tutorial on converting a file to a byte array in Kotlin.

Try the revamped Kotlin docs design! ... open fun nextBytes( array: ByteArray, fromIndex: Int = 0, toIndex: Int = array.size ): ByteArray (source)

In this program, you'll learn to convert a File object to byte[] and vice-versa in Kotlin.

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import kotlin.test.* fun main() ... } actual fun byteArrayOf(vararg elements: Byte): ByteArray(source) Returns an array containing the specified Byte numbers....

November 11, 2024 - The simplest way to convert a bytearray into a string is by using the default charset. In Kotlin, the ByteArray class provides a toString method, but it’s not suitable for direct conversion because it does not decode bytes into readable characters.

kotlin-stdlib/kotlin.collections/toUByteArray · @ExperimentalUnsignedTypesfun Array<out UByte>.toUByteArray(): UByteArray(source) Returns an array of UByte containing all of the elements of this generic array. 1.3 · @ExperimentalUnsignedTypesinline fun ByteArray.toUByteArray(): UByteArray(source) Returns an array of type UByteArray, which is a copy of this array where each element is an unsigned reinterpretation of the corresponding element of this array.

October 13, 2012 - kotlin-stdlib / kotlin / byteArrayOf · Common · JVM · JS · Native ·

kotlinx-serialization-core/kotlinx.serialization/decodeFromByteArray · inline fun <T> BinaryFormat.decodeFromByteArray(bytes: ByteArray): T(source) Decodes and deserializes the given byte array to the value of type T using deserializer retrieved from the reified type parameter.

expect fun String.encodeToByteArray(startIndex: Int = 0, endIndex: Int = this.length, throwOnInvalidSequence: Boolean = false): ByteArray(source) Encodes this string or its substring to an array of bytes in UTF-8 encoding.

import java.util.Locale import kotlin.test.* fun main(args: Array<String>) { //sampleStart val charset = Charsets.UTF_8 val byteArray = "Hello".toByteArray(charset) println(byteArray.contentToString()) // [72, 101, 108, 108, 111] println(byteArray.toString(charset)) // Hello //sampleEnd }