Summary: Constants | Methods | Inherited Methods

Base64

public class Base64
extends Object

java.lang.Object
↳	android.util.Base64

Utilities for encoding and decoding the Base64 representation of binary data. See RFCs 2045 and 3548.

Summary

Constants
`int`	`CRLF` Encoder flag bit to indicate lines should be terminated with a CRLF pair instead of just an LF.
`int`	`DEFAULT` Default values for encoder/decoder flags.
`int`	`NO_CLOSE` Flag to pass to `Base64OutputStream` to indicate that it should not close the output stream it is wrapping when it itself is closed.
`int`	`NO_PADDING` Encoder flag bit to omit the padding '=' characters at the end of the output (if any).
`int`	`NO_WRAP` Encoder flag bit to omit all line terminators (i.e., the output will be on one long line).
`int`	`URL_SAFE` Encoder/decoder flag bit to indicate using the "URL and filename safe" variant of Base64 (see RFC 3548 section 4) where `-` and `_` are used in place of `+` and `/`.

Public methods
`static byte[]`	`decode(String str, int flags)` Decode the Base64-encoded data in input and return the data in a new byte array.
`static byte[]`	`decode(byte[] input, int flags)` Decode the Base64-encoded data in input and return the data in a new byte array.
`static byte[]`	`decode(byte[] input, int offset, int len, int flags)` Decode the Base64-encoded data in input and return the data in a new byte array.
`static byte[]`	`encode(byte[] input, int flags)` Base64-encode the given data and return a newly allocated byte[] with the result.
`static byte[]`	`encode(byte[] input, int offset, int len, int flags)` Base64-encode the given data and return a newly allocated byte[] with the result.
`static String`	`encodeToString(byte[] input, int offset, int len, int flags)` Base64-encode the given data and return a newly allocated String with the result.
`static String`	`encodeToString(byte[] input, int flags)` Base64-encode the given data and return a newly allocated String with the result.

Inherited methods

From class java.lang.Object

`Object`	`clone()` Creates and returns a copy of this object.
`boolean`	`equals(Object obj)` Indicates whether some other object is "equal to" this one.
`void`	`finalize()` Called by the garbage collector on an object when garbage collection determines that there are no more references to the object.
`final Class<?>`	`getClass()` Returns the runtime class of this `Object`.
`int`	`hashCode()` Returns a hash code value for the object.
`final void`	`notify()` Wakes up a single thread that is waiting on this object's monitor.
`final void`	`notifyAll()` Wakes up all threads that are waiting on this object's monitor.
`String`	`toString()` Returns a string representation of the object.
`final void`	`wait(long timeoutMillis, int nanos)` Causes the current thread to wait until it is awakened, typically by being notified or interrupted, or until a certain amount of real time has elapsed.
`final void`	`wait(long timeoutMillis)` Causes the current thread to wait until it is awakened, typically by being notified or interrupted, or until a certain amount of real time has elapsed.
`final void`	`wait()` Causes the current thread to wait until it is awakened, typically by being notified or interrupted.

Constants

CRLF

Added in API level 8

 public static final int CRLF

Encoder flag bit to indicate lines should be terminated with a CRLF pair instead of just an LF. Has no effect if NO_WRAP is specified as well.

Constant Value: 4 (0x00000004)

DEFAULT

Added in API level 8

 public static final int DEFAULT

Default values for encoder/decoder flags.

Constant Value: 0 (0x00000000)

NO_CLOSE

Added in API level 8

 public static final int NO_CLOSE

Flag to pass to Base64OutputStream to indicate that it should not close the output stream it is wrapping when it itself is closed.

Constant Value: 16 (0x00000010)

NO_PADDING

Added in API level 8

 public static final int NO_PADDING

Encoder flag bit to omit the padding '=' characters at the end of the output (if any).

Constant Value: 1 (0x00000001)

NO_WRAP

Added in API level 8

 public static final int NO_WRAP

Encoder flag bit to omit all line terminators (i.e., the output will be on one long line).

Constant Value: 2 (0x00000002)

URL_SAFE

Added in API level 8

 public static final int URL_SAFE

Encoder/decoder flag bit to indicate using the "URL and filename safe" variant of Base64 (see RFC 3548 section 4) where - and _ are used in place of + and /.

Constant Value: 8 (0x00000008)

Public methods

decode

Added in API level 8

 public static byte[] decode (String str, int flags)

Decode the Base64-encoded data in input and return the data in a new byte array.

The padding '=' characters at the end are considered optional, but if any are present, there must be the correct number of them.

Parameters
`str`	`String`: the input String to decode, which is converted to bytes using the default charset
`flags`	`int`: controls certain features of the decoded output. Pass `DEFAULT` to decode standard Base64.

Returns
`byte[]`

Throws
`IllegalArgumentException`	if the input contains incorrect padding

decode

Added in API level 8

 public static byte[] decode (byte[] input, int flags)

Decode the Base64-encoded data in input and return the data in a new byte array.

The padding '=' characters at the end are considered optional, but if any are present, there must be the correct number of them.

Parameters
`input`	`byte`: the input array to decode
`flags`	`int`: controls certain features of the decoded output. Pass `DEFAULT` to decode standard Base64.

Returns
`byte[]`

Throws
`IllegalArgumentException`	if the input contains incorrect padding

decode

Added in API level 8

 public static byte[] decode (byte[] input, int offset, int len, int flags)

Decode the Base64-encoded data in input and return the data in a new byte array.

The padding '=' characters at the end are considered optional, but if any are present, there must be the correct number of them.

Parameters
`input`	`byte`: the data to decode
`offset`	`int`: the position within the input array at which to start
`len`	`int`: the number of bytes of input to decode
`flags`	`int`: controls certain features of the decoded output. Pass `DEFAULT` to decode standard Base64.

Returns
`byte[]`

Throws
`IllegalArgumentException`	if the input contains incorrect padding

encode

Added in API level 8

 public static byte[] encode (byte[] input, int flags)

Base64-encode the given data and return a newly allocated byte[] with the result.

Parameters
`input`	`byte`: the data to encode
`flags`	`int`: controls certain features of the encoded output. Passing `DEFAULT` results in output that adheres to RFC 2045.

Returns
`byte[]`

encode

Added in API level 8

 public static byte[] encode (byte[] input, int offset, int len, int flags)

Base64-encode the given data and return a newly allocated byte[] with the result.

Parameters
`input`	`byte`: the data to encode
`offset`	`int`: the position within the input array at which to start
`len`	`int`: the number of bytes of input to encode
`flags`	`int`: controls certain features of the encoded output. Passing `DEFAULT` results in output that adheres to RFC 2045.

Returns
`byte[]`

encodeToString

Added in API level 8

 public static String encodeToString (byte[] input, int offset, int len, int flags)

Base64-encode the given data and return a newly allocated String with the result.

Parameters
`input`	`byte`: the data to encode
`offset`	`int`: the position within the input array at which to start
`len`	`int`: the number of bytes of input to encode
`flags`	`int`: controls certain features of the encoded output. Passing `DEFAULT` results in output that adheres to RFC 2045.

Returns
`String`

encodeToString

Added in API level 8

 public static String encodeToString (byte[] input, int flags)

Base64-encode the given data and return a newly allocated String with the result.

Parameters
`input`	`byte`: the data to encode
`flags`	`int`: controls certain features of the encoded output. Passing `DEFAULT` results in output that adheres to RFC 2045.

Returns
`String`