Trouble generating Barcode using ZXing library with large data

Question

I need to generate barcode in 128A format with data: 900000588548001100001305000000000207201512345.6|12345.7

I'm using ZXing library and Here is my method:

private void barcodeGenerator(String data)
{
    try
    {
        com.google.zxing.MultiFormatWriter writer = new MultiFormatWriter();

        BitMatrix bm = writer.encode(data, BarcodeFormat.CODE_128, 700, 200);
        Bitmap ImageBitmap = Bitmap.createBitmap(700, 200, Config.ARGB_8888);

        for (int i = 0; i < 700; i++)
        {//width
            for (int j = 0; j < 200; j++)
            {//height
                ImageBitmap.setPixel(i, j, bm.get(i, j) ? Color.BLACK : Color.WHITE);
            }
        }

        File f = new File(Environment.getExternalStorageDirectory() + "/barcode1.png");


        FileOutputStream fos = new FileOutputStream(f);
        ImageBitmap.compress(Bitmap.CompressFormat.PNG, 100, fos);
    }
    catch(Exception e)
    {
        e.printStackTrace();
    }
}

This method generates and stores the barcode image in SDCard which m scanning using ZXing Barcode Scanner.

Barcode is successfully scanned when data is small. eg: 123.4|456.7

But if data is large, eg: 900000588548001100001305000000000207201512345.6|12345.7

It looks like some wrong barcode is generated and Scanner is not able to scan the generated barcode.

Thanks in advance for help.

Edit: Have added generated barcode images

Answer 1

您可以将您生成的条形码图像上传到ZXing Decoder Online，以确认它是否有效：

http://zxing.org/w/decode.jspx

Code 128 barcode的长度没有内在限制，您拥有的所有字符都有效。

话虽如此，使用Code 128A条形码，编码超过20个字符会使得条形码非常宽并且难以扫描。

条形码可能有效但扫描仪相机无法获得足够清晰的条形码图片。

请查看此问题以获取更多信息：Unable to scan Code 128

如果可能，建议使用替代条形码格式，例如QR码，它可以存储更多数据而不增加条形码大小。

Answer 2

https://play.google.com/store/apps/details?id=com.srowen.bs.android android 应用程序扫描完美。但在生成条码的同时，尽量减少宽度和高度，以方便手机摄像头扫描。

我为 900000588548001100001305000000000207201512345.6|12345.7 重新生成了 CODE-128 条码，只有 300 和 150，它可以扫描，如果它不能按比例放大宽度和高度。 生成的条码：https://i.stack.imgur.com/UF0qJ.png

Screenshot after scanning