correctly print chinese text

lib/src/printer.dart

@@ -9,6 +9,7 @@
 import 'dart:convert';
 import 'dart:io';
 import 'dart:typed_data';
+import 'package:gbk_codec/gbk_codec.dart';
 import 'package:hex/hex.dart';
 import 'package:image/image.dart';
 import 'barcode.dart';
@@ -132,7 +133,7 @@ class Printer {
     if (cancelKanji) {
       _socket.add(latin1.encode(text));
     } else {
-      _socket.write(text);
+      _socket.add(gbk_bytes.encode(text));
     }
   }
 

pubspec.yaml

@@ -12,6 +12,7 @@ dependencies:
     sdk: flutter
   hex: ^0.1.2
   image: ^2.1.4
+  gbk_codec: ^0.3.1+3
 
 dev_dependencies:
   flutter_test: