How to native convert string -> base64 and base64 -> string

Question

How to native convert string -> base64 and base64 -> string

I\'m find only this bytes to base64string

would like this:

Answer 1

You can use the BASE64 codec (renamed base64 in Dart 2) and the LATIN1 codec (renamed latin1 in Dart 2) from convert library.

var stringToEncode = 'Dart is awesome';

// encoding

var bytesInLatin1 = LATIN1.encode(stringToEncode);
// [68, 97, 114, 116, 32, 105, 115, 32, 97, 119, 101, 115, 111, 109, 101]

var base64encoded = BASE64.encode(bytesInLatin1);
// RGFydCBpcyBhd2Vzb21l

// decoding

var bytesInLatin1_decoded = BASE64.decode(base64encoded);
// [68, 97, 114, 116, 32, 105, 115, 32, 97, 119, 101, 115, 111, 109, 101]

var initialValue = LATIN1.decode(bytesInLatin1_decoded);
// Dart is awesome

If you always use LATIN1 to generate the encoded String you can avoid the 2 convert calls by creating a codec to directly convert a String to/from an encoded String.

var codec = LATIN1.fuse(BASE64);

print(codec.encode('Dart is awesome'));
// RGFydCBpcyBhd2Vzb21l

print(codec.decode('RGFydCBpcyBhd2Vzb21l'));
// Dart is awesome