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.
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 |
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
|
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
| |
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)
int DEFAULT
Default values for encoder/decoder flags.
Constant Value: 0 (0x00000000)
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)
int NO_PADDING
Encoder flag bit to omit the padding '=' characters at the end of the output (if any).
Constant Value: 1 (0x00000001)
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)
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)
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 |
Developers
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 |
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 |
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[] |
|
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[] |
|
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 |
|
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 |
|