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  • Android打印机--小票打印格式及模板设置

    小票打印就是向打印设备发送控制打印格式的指令集,而这些打印格式须要去查询相应打印机的API文档,这里我把经常使用的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

    /**
     * 打印格式
     * Created by john on 17-3-23.
     */
    
    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
    
        /**
         * 打印二维码
         * @param qrCode
         * @return
         */
        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); } /** * 打印条码 * @param barcode * @return */ public static String getBarcodeCmd(String barcode) { // 打印 Code-128 条码时须要使用字符集前缀 // "{A" 表示大写字母 // "{B" 表示全部字母。数字,符号 // "{C" 表示数字,能够表示 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)) { // 假设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}; // 最后一个參数表示宽度 取值范围 1-6 假设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}; // 最后两个參数 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); } /** * 切纸 * @return */ public static String getCutPaperCmd() { // 走纸并切纸,最后一个參数控制走纸的长度 byte[] data = {(byte) 0x1d, (byte) 0x56, (byte) 0x42, (byte) 0x15}; return new String(data); } /** * 对齐方式 * @param alignMode * @return */ 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); } /** * 字体大小 * @param fontSize * @return */ 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); } /** * 加粗模式 * @param fontBold * @return */ 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); } /** * 打开钱箱 * @return */ 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); } /** * 字符串转字节数组 * @param str * @return */ 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; } /** * 字节数组合并 * @param bytesA * @param bytesB * @return */ 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。还要对详细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。比方底部结束语–可能是公司宣传语或广告语。这些内容是否展示须要依据详细需求加以控制。还有二维码、条形码打印,是否切纸等须要依据实际场景取舍,所以最好封装一个打印配置类。以控制打印内容显示。

    /**
     * 打印模板
     */
    public class PrintContract {
    
        /**
         * 打印内容
         */
        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。调用次数依据换行数来控制
            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须要计算出来
            addIdenticalStrToStringBuilder(builder, x, " ");
    
            //切纸
            builder.append(PrintFormatUtils.getCutPaperCmd());
    
            return builder;
        }
    
        /**
         * 向StringBuilder中加入指定数量的同样字符
         *
         * @param printCount   加入的字符数量
         * @param identicalStr 加入的字符
         */
    
        private static void addIdenticalStrToStringBuilder(StringBuilder builder, int printCount, String identicalStr) {
            for (int i = 0; i < printCount; i++) {
                builder.append(identicalStr);
            }
        }
    
        /**
         * 依据字符串截取前指定字节数,依照GBK编码进行截取
         *
         * @param str 原字符串
         * @param len 截取的字节数
         * @return 截取后的字符串
         */
        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;
        }
    
        /**
         * 加入换行符
         */
        private static void addLineSeparator(StringBuilder builder) {
            builder.append("
    ");
        }
    
        /**
         * 在GBK编码下。获取其字符串占领的字符个数
         */
        private static int getCharCountByGBKEncoding(String text) {
            try {
                return text.getBytes("GBK").length;
            } catch (Exception e) {
                e.printStackTrace();
                return 0;
            }
        }
    
    
       /**
        * 打印相关配置
        */
        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);
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  • 原文地址:https://www.cnblogs.com/gccbuaa/p/7293773.html
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