如何使用蓝牙热敏打印机打印发票收据

Question

我必须使用热敏打印机打印发票收据。我已经使用 Zjiang Thermal printer 打印收据。他们还提供 manual 和演示项目。在演示项目中，他们使用库 "btsdk.jar" 来实现连接和打印。

我已成功建立打印机与 android 设备之间的连接。但是没有关于文本对齐方式（居中、左、右）和单元格宽度、高度的指南。

我have try it. It only change text height by changing format2变量。

如何通过蓝牙打印机打印发票。

也请解释这一段-

 byte[] cmd = new byte[3];
 cmd[0] = 0x1b;
 cmd[1] = 0x21;
 cmd[2] |= 0x10;

cmd2 - 用于改变字体高度 cmd[0] & cmd1

有什么用

在演示项目中向蓝牙打印机发送打印消息的代码

 String msg = "";
 byte[] cmd = new byte[3];
 cmd[0] = 0x1b;
 cmd[1] = 0x21;
 cmd[2] |= 0x10;
 mService.write(cmd);           
 mService.sendMessage("Congratulations!\n", "GBK"); 
 cmd[2] &= 0xEF;
 mService.write(cmd);          
 msg = "  You have sucessfully created communications between your device and our bluetooth printer.\n\n"
      +"  the company is a high-tech enterprise which specializes" +
        " in R&D,manufacturing,marketing of thermal printers and barcode scanners.\n\n";
 mService.sendMessage(msg,"GBK");

打印信息-

       parameters:support to download the Logo trademark
       FontA:12*24 dots,1.5(W)*3.0(H) mm
       FontB:9*17 dots, 1.1(W)*2.1(H) mm
       Simplified/Traditional: 24*24 dots, 3.0(W)*3.0(H)
       Line spacing: 3.75mm (Default)
       Barcode Types:-
       1D Barcode- UPC-A/UPC-E, JAN13(EAN13), JAN8(EAN8), CODE39/ITF, CODABAR,CODE93
       2d Barcode- QR CODE

发票收据

Answer 1

我在互联网上找到了下图的文本对齐方式。希望对你有帮助

Answer 2

你可以用这个

void printLine(String txt, char type){
    byte[] format = { 27, 33, 0 };
    byte[] arrayOfByte1 = { 27, 33, 0 };

    if (type == 'b') {
        format[2] = ((byte) (0x8 | arrayOfByte1[2])); //BOLD
    }
    if (type == 'h') {
        format[2] = ((byte) (0x10 | arrayOfByte1[2])); //HEIGHT
    }
    if (type == 'w') {
        format[2] = ((byte) (0x20 | arrayOfByte1[2])); //WIDTH
    }
    if (type == 'u') {
        format[2] = ((byte) (0x80 | arrayOfByte1[2])); //UNDERLINE
    }
    if (type == 's') {
        format[2] = ((byte) (0x1 | arrayOfByte1[2])); //SMALL
    }
    mService.write(format);
    mService.sendMessage(txt,"GBK");
}

归功于 Leonardo Sapuy 和他的原创 q/a Format text in bluetooth printer 感谢 Murtaza Khursheed Hussain 派我来这里

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