使用热敏打印机Android打印条形码 [英] Print barcode using thermal printer Android

问题描述

我能够打印文本，但是涉及条形码时，它不显示或仅显示不规则的文本.

I was able to print text but when it comes to barcode it not showing or just showing irregular text.

这是我的源代码

//barcode 128
                byte[] formats  = {(byte) 0x1d, (byte) 0x6b, (byte) 0x73,(byte) 0x0d};
                byte[] contents = content.getBytes();

                byte[] bytes    = new byte[formats.length + contents.length];

                System.arraycopy(formats, 0, bytes, 0, formats.length );
                System.arraycopy(contents, 0, bytes, formats.length, contents.length);


                usbCtrl.sendByte(bytes, dev);

                usbCtrl.sendByte(LineFeed(), dev);

但结果条码未显示，我是否缺少某些东西

but the result barcode is not showing, am i missing something

请帮助我

编辑

我找到了ESC/POS代码:

I found the ESC/POS code :

GS k m d1 ... dk NUL或GS k m n d1 ... d k

GS k m d1...dk NUL or GS k m n d1...d k

但是当我尝试这样做时，仍然得到相同的结果

But when I try this, still got same result

推荐答案

GS k POS代码具有两个版本(您已经发现):

The GS k POS code has two versions (as you already discovered):

GS k    - print one dimensional barcode  
   m    - barcode mode selector  
   [d]k - data bytes
   NUL  - terminator

此版本仅适用于纯ASCII数据，因为它使用 0x00 (NUL)作为终止符.

This version works only for pure ASCII data since it uses a 0x00 (NUL) as terminator.

GS k    - print one dimensional barcode  
   m    - barcode mode selector  
   n    - content length in bytes
   [d]k - data bytes

此版本使用一个额外的长度字节 n 来指示数据部分(它也仅适用于某些编码，包括 CODE128 ).

This version uses an additional length byte n to indicate the data part (it's also only suitable for certain codings including CODE128).

您的代码在命令字节中有一个流浪汉 0x0d ，并且格式可能也错误.

Your code has a stray 0x0d in the command bytes and may also be using the wrong format.

如果您打算打印纯ASCII数据格式，请使用以下命令:

If you plan to print pure ASCII data format the command like this:

byte[] formats  = {(byte) 0x1d, (byte) 0x6b, (byte) 0x49};
byte[] contents = content.getBytes();

byte[] bytes    = new byte[formats.length + contents.length + 1];

System.arraycopy(formats, 0, bytes, 0, formats.length );
System.arraycopy(contents, 0, bytes, formats.length, contents.length);

// add a terminating NULL
bytes[formats.length + contents.length] = (byte) 0x00;

或更安全的版本，因为它也具有预期的数据长度:

Or the more secure version since it also has the expected data length:

byte[] contents = content.getBytes();
// include the content length after the mode selector (0x49)
byte[] formats  = {(byte) 0x1d, (byte) 0x6b, (byte) 0x49, (byte)content.length};

byte[] bytes    = new byte[formats.length + contents.length];

System.arraycopy(formats, 0, bytes, 0, formats.length );
System.arraycopy(contents, 0, bytes, formats.length, contents.length);

如果这两种方法均 都不起作用，则您的打印机可能根本不支持 CODE128 .

If neither of the two work then your printer may simply not support CODE128.

5890是一个足够普遍的规格，市场上有许多便宜的即插即用"替代产品，它们省去了更复杂的条形码实现，并且仅包含简单的编码，例如 EAN8 ， EAN13 等.

The 5890 is a common enough specification and there are lots of cheap "drop-in" replacements on the market which leave out the more complex barcode implementations and only include simple codings like EAN8, EAN13 etc.

这篇关于使用热敏打印机Android打印条形码的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！