Android打印机--小票打印格式及模板设置实例代码

小票打印就是向打印设备发送控制打印格式的指令集，而这些打印格式需要去查询对应打印机的API文档，这里我把常用的api给封装了一下

文字对齐方式 打印字体大小 字体是否加粗 打印二维码 打印条形码 切纸 打开钱箱 字符串转字节数组 字符拼接

PrintFormatUtils.Java

public class PrintFormatUtils {
  // 对齐方式
  public static final int ALIGN_LEFT = 0;   // 靠左
  public static final int ALIGN_CENTER = 1;  // 居中
  public static final int ALIGN_RIGHT = 2;  // 靠右
  //字体大小
  public static final int FONT_NORMAL = 0;  // 正常
  public static final int FONT_MIDDLE = 1;  // 中等
  public static final int FONT_BIG = 2;    // 大
  //加粗模式
  public static final int FONT_BOLD = 0;       // 字体加粗
  public static final int FONT_BOLD_CANCEL = 1;    // 取消加粗
  
  public static String getQrCodeCmd(String qrCode) {
    byte[] data;
    int store_len = qrCode.length() + 3;
    byte store_pL = (byte) (store_len % 256);
    byte store_pH = (byte) (store_len / 256);
    // QR Code: Select the model
    //       Hex   1D   28   6B   04   00   31   41   n1(x32)   n2(x00) - size of model
    // set n1 [49 x31, model 1] [50 x32, model 2] [51 x33, micro qr code]
    // https://reference.epson-biz.com/modules/ref_escpos/index.php?content_id=140
    byte[] modelQR = {(byte)0x1d, (byte)0x28, (byte)0x6b, (byte)0x04, (byte)0x00, (byte)0x31, (byte)0x41, (byte)0x32, (byte)0x00};
    // QR Code: Set the size of module
    // Hex   1D   28   6B   03   00   31   43   n
    // n depends on the printer
    // https://reference.epson-biz.com/modules/ref_escpos/index.php?content_id=141
    byte[] sizeQR = {(byte)0x1d, (byte)0x28, (byte)0x6b, (byte)0x03, (byte)0x00, (byte)0x31, (byte)0x43, (byte)0x08};
    //     Hex   1D   28   6B   03   00   31   45   n
    // Set n for error correction [48 x30 -> 7%] [49 x31-> 15%] [50 x32 -> 25%] [51 x33 -> 30%]
    // https://reference.epson-biz.com/modules/ref_escpos/index.php?content_id=142
    byte[] errorQR = {(byte)0x1d, (byte)0x28, (byte)0x6b, (byte)0x03, (byte)0x00, (byte)0x31, (byte)0x45, (byte)0x31};
    // QR Code: Store the data in the symbol storage area
    // Hex   1D   28   6B   pL   pH   31   50   30   d1...dk
    // https://reference.epson-biz.com/modules/ref_escpos/index.php?content_id=143
    //            1D     28     6B     pL     pH cn(49->x31) fn(80->x50) m(48->x30) d1…dk
    byte[] storeQR = {(byte)0x1d, (byte)0x28, (byte)0x6b, store_pL, store_pH, (byte)0x31, (byte)0x50, (byte)0x30};
    // QR Code: Print the symbol data in the symbol storage area
    // Hex   1D   28   6B   03   00   31   51   m
    // https://reference.epson-biz.com/modules/ref_escpos/index.php?content_id=144
    byte[] printQR = {(byte)0x1d, (byte)0x28, (byte)0x6b, (byte)0x03, (byte)0x00, (byte)0x31, (byte)0x51, (byte)0x30};
    data = byteMerger(modelQR, sizeQR);
    data = byteMerger(data, errorQR);
    data = byteMerger(data, storeQR);
    data = byteMerger(data, qrCode.getBytes());
    data = byteMerger(data, printQR);
    return new String(data);
  }
  
  public static String getBarcodeCmd(String barcode) {
    // 打印 Code-128 条码时需要使用字符集前缀
    // "{A" 表示大写字母
    // "{B" 表示所有字母，数字，符号
    // "{C" 表示数字，可以表示 00 - 99 的范围
    byte[] data;
    String btEncode;
    if (barcode.length() < 18) {
      // 字符长度小于15的时候直接输出字符串
      btEncode = "{B" + barcode;
    } else {
      // 否则做一点优化
      int startPos = 0;
      btEncode = "{B";
      for (int i = 0; i < barcode.length(); i++) {
        char curChar = barcode.charAt(i);
        if (curChar < 48 || curChar > 57 || i == (barcode.length() - 1)) {
          // 如果是非数字或者是最后一个字符
          if (i - startPos >= 10) {
            if (startPos == 0) {
              btEncode = "";
            }
            btEncode += "{C";
            boolean isFirst = true;
            int numCode = 0;
            for (int j = startPos; j < i; j++) {
              if (isFirst) { // 处理第一位
                numCode = (barcode.charAt(j) - 48) * 10;
                isFirst = false;
              } else { // 处理第二位
                numCode += (barcode.charAt(j) - 48);
                btEncode += (char) numCode;
                isFirst = true;
              }
            }
            btEncode += "{B";
            if (!isFirst) {
              startPos = i - 1;
            } else {
              startPos = i;
            }
          }
          for (int k = startPos; k <= i; k++) {
            btEncode += barcode.charAt(k);
          }
          startPos = i + 1;
        }
      }
    }
    // 设置 HRI 的位置，02 表示下方
    byte[] hriPosition = {(byte) 0x1d, (byte) 0x48, (byte) 0x02};
    // 最后一个参数表示宽度 取值范围 1-6 如果条码超长则无法打印
    byte[] width = {(byte) 0x1d, (byte) 0x77, (byte) 0x02};
    byte[] height = {(byte) 0x1d, (byte) 0x68, (byte) 0xfe};
    // 最后两个参数 73 ： CODE 128 || 编码的长度
    byte[] barcodeType = {(byte) 0x1d, (byte) 0x6b, (byte) 73, (byte) btEncode.length()};
    byte[] print = {(byte) 10, (byte) 0};
    data = PrintFormatUtils.byteMerger(hriPosition, width);
    data = PrintFormatUtils.byteMerger(data, height);
    data = PrintFormatUtils.byteMerger(data, barcodeType);
    data = PrintFormatUtils.byteMerger(data, btEncode.getBytes());
    data = PrintFormatUtils.byteMerger(data, print);
    return new String(data);
  }
  
  public static String getCutPaperCmd() {
    // 走纸并切纸，最后一个参数控制走纸的长度
    byte[] data = {(byte) 0x1d, (byte) 0x56, (byte) 0x42, (byte) 0x15};
    return new String(data);
  }
  
  public static String getAlignCmd(int alignMode) {
    byte[] data = {(byte) 0x1b, (byte) 0x61, (byte) 0x0};
    if (alignMode == ALIGN_LEFT) {
      data[2] = (byte) 0x00;
    } else if (alignMode == ALIGN_CENTER) {
      data[2] = (byte) 0x01;
    } else if (alignMode == ALIGN_RIGHT) {
      data[2] = (byte) 0x02;
    }
    return new String(data);
  }
  
  public static String getFontSizeCmd(int fontSize) {
    byte[] data = {(byte) 0x1d, (byte) 0x21, (byte) 0x0};
    if (fontSize == FONT_NORMAL) {
      data[2] = (byte) 0x00;
    } else if (fontSize == FONT_MIDDLE) {
      data[2] = (byte) 0x01;
    } else if (fontSize == FONT_BIG) {
      data[2] = (byte) 0x11;
    }
    return new String(data);
  }
  
  public static String getFontBoldCmd(int fontBold) {
    byte[] data = {(byte) 0x1b, (byte) 0x45, (byte) 0x0};
    if (fontBold == FONT_BOLD) {
      data[2] = (byte) 0x01;
    } else if (fontBold == FONT_BOLD_CANCEL) {
      data[2] = (byte) 0x00;
    }
    return new String(data);
  }
  
  public static String getOpenDrawerCmd() {
    byte[] data = new byte[4];
    data[0] = 0x10;
    data[1] = 0x14;
    data[2] = 0x00;
    data[3] = 0x00;
    return new String(data);
  }
  
  public static byte[] stringToBytes(String str) {
    byte[] data = null;
    try {
      byte[] strBytes = str.getBytes("utf-8");
      data = (new String(strBytes, "utf-8")).getBytes("gbk");
    } catch (UnsupportedEncodingException exception) {
      exception.printStackTrace();
    }
    return data;
  }
  
  public static byte[] byteMerger(byte[] bytesA, byte[] bytesB) {
    byte[] bytes = new byte[bytesA.length + bytesB.length];
    System.arraycopy(bytesA, 0, bytes, 0, bytesA.length);
    System.arraycopy(bytesB, 0, bytes, bytesA.length, bytesB.length);
    return bytes;
  }
}

有了打印格式，还要对具体的打印小票设置打印模板，主要就是利用上面的打印格式工具类，进行字符或字符串拼接，设置文字间空格的长度，以及使用换行符换行等。

有些小票打印的内容有可能是通用的，比如底部结束语–可能是公司宣传语或广告语，这些内容是否展示需要根据具体需求加以控制，还有二维码、条形码打印，是否切纸等需要根据实际场景取舍，所以最好封装一个打印配置类，以控制打印内容显示。

public class PrintContract {
  
  public static StringBuilder createXxTxt(String ...) {
    StringBuilder builder = new StringBuilder();
    //设置大号字体以及加粗
    builder.append(PrintFormatUtils.getFontSizeCmd(PrintFormatUtils.FONT_BIG));
    builder.append(PrintFormatUtils.getFontBoldCmd(PrintFormatUtils.FONT_BOLD));
    // 标题
    builder.append("Title");
    //换行，调用次数根据换行数来控制
    addLineSeparator(builder);
    //设置普通字体大小、不加粗
    builder.append(PrintFormatUtils.getFontSizeCmd(PrintFormatUtils.FONT_NORMAL));
    builder.append(PrintFormatUtils.getFontBoldCmd(PrintFormatUtils.FONT_BOLD_CANCEL));
    //内容
    ......
    //设置某两列文字间空格数, x需要计算出来
    addIdenticalStrToStringBuilder(builder, x, " ");
    //切纸
    builder.append(PrintFormatUtils.getCutPaperCmd());
    return builder;
  }
  
  private static void addIdenticalStrToStringBuilder(StringBuilder builder, int printCount, String identicalStr) {
    for (int i = 0; i < printCount; i++) {
      builder.append(identicalStr);
    }
  }
  
  private static String subStringByGBK(String str, int len) {
    String result = null;
    if (str != null) {
      try {
        byte[] a = str.getBytes("GBK");
        if (a.length <= len) {
          result = str;
        } else if (len > 0) {
          result = new String(a, 0, len, "GBK");
          int length = result.length();
          if (str.charAt(length - 1) != result.charAt(length - 1)) {
            if (length < 2) {
              result = null;
            } else {
              result = result.substring(0, length - 1);
            }
          }
        }
      } catch (Exception e) {
        e.printStackTrace();
      }
    }
    return result;
  }
  
  private static void addLineSeparator(StringBuilder builder) {
    builder.append("\n");
  }
  
  private static int getCharCountByGBKEncoding(String text) {
    try {
      return text.getBytes("GBK").length;
    } catch (Exception e) {
      e.printStackTrace();
      return 0;
    }
  }
  
  public static class PrintConfig {
    public int maxLength = 30;
    public boolean printBarcode = false; // 打印条码
    public boolean printQrCode = false;  // 打印二维码
    public boolean printEndText = true;  // 打印结束语
    public boolean needCutPaper = false; // 是否切纸
  }
}

有了打印模板，接下来就是调用打印设备打印方法发送打印指令

//调用打印机打印方法，传入上面某个小票打印模板返回的字符串
String str = PrintContract.createXxTxt(...);
printer.print(str, null);
//打开钱箱方法
printer.print(PrintFormatUtils.getOpenDrawerCmd(), null);

您可能感兴趣的文章:Android实现PDF预览打印功能Android gradle插件打印时间戳的方法详解Android编程实现计算两个日期之间天数并打印所有日期的方法Android中如何安全地打印日志详解Mac 下 Android Studio 不打印日志的解决办法Android jni调试打印char阵列的实例详解Android下的POS打印机调用的简单实现Android 蓝牙连接 ESC/POS 热敏打印机打印实例（ESC/POS指令篇）Android 蓝牙连接 ESC/POS 热敏打印机打印实例（蓝牙连接篇）Android进阶——安卓调用ESC/POS打印机打印实例Android手机通过蓝牙连接佳博打印机的实例代码Android实现系统打印功能