Added in API level 1

Checksum

interface Checksum

java.util.zip.Checksum

Known Direct Subclasses

Adler32, CRC32, CRC32C

Adler32	A class that can be used to compute the Adler-32 checksum of a data stream.
CRC32	A class that can be used to compute the CRC-32 of a data stream.
CRC32C	A class that can be used to compute the CRC-32C of a data stream.

An interface representing a data checksum.

Summary

Public methods
abstract Long	`getValue()` Returns the current checksum value.
abstract Unit	`reset()` Resets the checksum to its initial value.
open Unit	`update(b: ByteArray!)` Updates the current checksum with the specified array of bytes.
abstract Unit	`update(b: ByteArray!, off: Int, len: Int)` Updates the current checksum with the specified array of bytes.
abstract Unit	`update(b: Int)` Updates the current checksum with the specified byte.
open Unit	`update(buffer: ByteBuffer!)` Updates the current checksum with the bytes from the specified buffer.

Public methods

getValue

Added in API level 1

abstract fun getValue(): Long

Returns the current checksum value.

Return
`Long`	the current checksum value

reset

Added in API level 1

abstract fun reset(): Unit

Resets the checksum to its initial value.

update

Added in API level 34

open fun update(b: ByteArray!): Unit

Updates the current 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 1

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

Updates the current 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

update

Added in API level 1

abstract fun update(b: Int): Unit

Updates the current checksum with the specified byte.

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

update

Added in API level 34

open fun update(buffer: ByteBuffer!): Unit

Updates the current 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`