Added in API level 1

CRC32

open class CRC32 : Checksum

kotlin.Any
↳	java.util.zip.CRC32

A class that can be used to compute the CRC-32 of a data stream.

Passing a null argument to a method in this class will cause a NullPointerException to be thrown.

Summary

Public constructors
`CRC32()` Creates a new CRC32 object.

Public methods
open Long	`getValue()` Returns CRC-32 value.
open Unit	`reset()` Resets CRC-32 to initial value.
open Unit	`update(b: Int)` Updates the CRC-32 checksum with the specified byte (the low eight bits of the argument b).
open Unit	`update(b: ByteArray!, off: Int, len: Int)` Updates the CRC-32 checksum with the specified array of bytes.
open Unit	`update(b: ByteArray!)` Updates the CRC-32 checksum with the specified array of bytes.
open Unit	`update(buffer: ByteBuffer!)` Updates the CRC-32 checksum with the bytes from the specified buffer.

Public constructors

CRC32

Added in API level 1

CRC32()

Creates a new CRC32 object.

Public methods

getValue

Added in API level 1

open fun getValue(): Long

Returns CRC-32 value.

Return
`Long`	the current checksum value

reset

Added in API level 1

open fun reset(): Unit

Resets CRC-32 to initial value.

update

Added in API level 1

open fun update(b: Int): Unit

Updates the CRC-32 checksum with the specified byte (the low eight bits of the argument b).

Parameters
`b`	Int: the byte to update the checksum with

update

Added in API level 1

open fun update(
    b: ByteArray!, 
    off: Int, 
    len: Int
): Unit

Updates the CRC-32 checksum with the specified array of bytes.

Parameters
`b`	ByteArray!: the byte array to update the checksum with
`off`	Int: the start offset of the data
`len`	Int: the number of bytes to use for the update

Exceptions
`java.lang.ArrayIndexOutOfBoundsException`	if `off` is negative, or `len` is negative, or `off+len` is negative or greater than the length of the array `b`.

update

Added in API level 1

open fun update(b: ByteArray!): Unit

Updates the CRC-32 checksum with the specified array of bytes.

Parameters
`b`	ByteArray!: the array of bytes to update the checksum with

Exceptions
`java.lang.NullPointerException`	if `b` is `null`

update

Added in API level 26

open fun update(buffer: ByteBuffer!): Unit

Updates the CRC-32 checksum with the bytes from the specified buffer. The checksum is updated with the remaining bytes in the buffer, starting at the buffer's position. Upon return, the buffer's position will be updated to its limit; its limit will not have been changed.

Parameters
`buffer`	ByteBuffer!: the ByteBuffer to update the checksum with

Exceptions
`java.lang.NullPointerException`	if `buffer` is `null`