前言
前一段时间由于工作需要，要研究一下安卓程序调用打印机打印小票，并且要求不能使用蓝牙调用，研究了一下，可以利用socket连接，来实现打印功能。写了个Demo，分享一下。
工具：一台打印机（芯烨XP-80XX），一台安卓测试机
开发环境：Android Studio 1.5
需求：点击按钮，实现打印小票功能，小票上除必要文字外，还要有二维码。
封装了一个Pos打印工具类：
package com.example.haoguibao.myapplication; import java.io.DataOutputStream; import java.io.IOException; import java.io.OutputStream; import java.io.OutputStreamWriter; import java.net.Socket; /** * Created by haoguibao on 16/2/18. * Description : 封装Pos机打印工具类 * Revision : */ public class Pos { //定义编码方式 private static String encoding = null; private Socket sock = null; // 通过socket流进行读写 private OutputStream socketOut = null; private OutputStreamWriter writer = null; /** * 初始化Pos实例 * * @param ip 打印机IP * @param port 打印机端口号 * @param encoding 编码 * @throws IOException */ public Pos(String ip, int port, String encoding) throws IOException { sock = new Socket(ip, port); socketOut = new DataOutputStream(sock.getOutputStream()); this.encoding = encoding; writer = new OutputStreamWriter(socketOut, encoding); } /** * 关闭IO流和Socket * * @throws IOException */ protected void closeIOAndSocket() throws IOException { writer.close(); socketOut.close(); sock.close(); } /** * 打印二维码 * * @param qrData 二维码的内容 * @throws IOException */ protected void qrCode(String qrData) throws IOException { int moduleSize = 8; int length = qrData.getBytes(encoding).length; //打印二维码矩阵 writer.write(0x1D);// init writer.write("(k");// adjust height of barcode writer.write(length + 3); // pl writer.write(0); // ph writer.write(49); // cn writer.write(80); // fn writer.write(48); // writer.write(qrData); writer.write(0x1D); writer.write("(k"); writer.write(3); writer.write(0); writer.write(49); writer.write(69); writer.write(48); writer.write(0x1D); writer.write("(k"); writer.write(3); writer.write(0); writer.write(49); writer.write(67); writer.write(moduleSize); writer.write(0x1D); writer.write("(k"); writer.write(3); // pl writer.write(0); // ph writer.write(49); // cn writer.write(81); // fn writer.write(48); // m writer.flush(); } /** * 进纸并全部切割 * * @return * @throws IOException */ protected void feedAndCut() throws IOException { writer.write(0x1D); writer.write(86); writer.write(65); // writer.write(0); //切纸前走纸多少 writer.write(100); writer.flush(); //另外一种切纸的方式 // byte[] bytes = {29, 86, 0}; // socketOut.write(bytes); } /** * 打印换行 * * @return length 需要打印的空行数 * @throws IOException */ protected void printLine(int lineNum) throws IOException { for (int i = 0; i < lineNum; i++) { writer.write("/n"); } writer.flush(); } /** * 打印换行(只换一行) * * @throws IOException */ protected void printLine() throws IOException { writer.write("/n"); writer.flush(); } /** * 打印空白(一个Tab的位置，约4个汉字) * * @param length 需要打印空白的长度, * @throws IOException */ protected void printTabSpace(int length) throws IOException { for (int i = 0; i < length; i++) { writer.write("/t"); } writer.flush(); } /** * 打印空白（一个汉字的位置） * * @param length 需要打印空白的长度, * @throws IOException */ protected void printWordSpace(int length) throws IOException { for (int i = 0; i < length; i++) { writer.write(" "); } writer.flush(); } /** * 打印位置调整 * * @param position 打印位置 0：居左(默认) 1：居中 2：居右 * @throws IOException */ protected void printLocation(int position) throws IOException { writer.write(0x1B); writer.write(97); writer.write(position); writer.flush(); } /** * 绝对打印位置 * * @throws IOException */ protected void printLocation(int light, int weight) throws IOException { writer.write(0x1B); writer.write(0x24); writer.write(light); writer.write(weight); writer.flush(); } /** * 打印文字 * * @param text * @throws IOException */ protected void printText(String text) throws IOException { String s = text; byte[] content = s.getBytes("gbk"); socketOut.write(content); socketOut.flush(); } /** * 新起一行，打印文字 * * @param text * @throws IOException */ protected void printTextNewLine(String text) throws IOException { //换行 writer.write("/n"); writer.flush(); String s = text; byte[] content = s.getBytes("gbk"); socketOut.write(content); socketOut.flush(); } /** * 初始化打印机 * * @throws IOException */ protected void initPos() throws IOException { writer.write(0x1B); writer.write(0x40); writer.flush(); } /** * 加粗 * * @param flag false为不加粗 * @return * @throws IOException */ protected void bold(boolean flag) throws IOException { if (flag) { //常规粗细 writer.write(0x1B); writer.write(69); writer.write(0xF); writer.flush(); } else { //加粗 writer.write(0x1B); writer.write(69); writer.write(0); writer.flush(); } } } 其中，打印机的IP和端口号从打印机的属性设置处可查。
MainActivity中进行调用：
package com.example.haoguibao.myapplication; import android.os.Bundle; import android.support.v7.app.AppCompatActivity; import android.view.View; import android.widget.Button; import java.io.IOException; import java.net.UnknownHostException; import java.util.ArrayList; import java.util.List; public class MainActivity extends AppCompatActivity { //订单菜品集合 private List<FoodsBean> foodsBean; private Pos pos; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); Button bt_print = (Button) findViewById(R.id.button); bt_print.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { // 开启一个子线程 new Thread() { public void run() { try { pos = new Pos("IP", 9100, "GBK"); //第一个参数是打印机网口IP //初始化打印机 pos.initPos(); //初始化订单数据 initData(); pos.bold(true); pos.printTabSpace(2); pos.printWordSpace(1); pos.printText("**测试店铺"); pos.printLocation(0); pos.printTextNewLine("----------------------------------------------"); pos.bold(false); pos.printTextNewLine("订 单 号：1005199"); pos.printTextNewLine("用 户 名：15712937281"); pos.printTextNewLine("桌 号：3号桌"); pos.printTextNewLine("订单状态：订单已确认"); pos.printTextNewLine("订单日期：2016/2/19 12:34:53"); pos.printTextNewLine("付 款 人：线下支付（服务员：宝哥）"); pos.printTextNewLine("服 务 员：1001"); pos.printTextNewLine("订单备注：不要辣，少盐"); pos.printLine(2); pos.printText("品项"); pos.printLocation(20, 1); pos.printText("单价"); pos.printLocation(99, 1); pos.printWordSpace(1); pos.printText("数量"); pos.printWordSpace(3); pos.printText("小计"); pos.printTextNewLine("----------------------------------------------"); for (FoodsBean foods : foodsBean) { pos.printTextNewLine(foods.getName()); pos.printLocation(20, 1); pos.printText(foods.getPrice()); pos.printLocation(99, 1); pos.printWordSpace(1); pos.printText(foods.getNumber()); pos.printWordSpace(3); pos.printText(foods.getSum()); } pos.printTextNewLine("----------------------------------------------"); pos.printLocation(1); pos.printLine(2); //打印二维码 pos.qrCode("http://blog.csdn.net/haovip123"); //切纸 pos.feedAndCut(); pos.closeIOAndSocket(); pos = null; } catch (UnknownHostException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } } }.start(); } }); } private void initData() { foodsBean = new ArrayList<>(); for (int i = 0; i < 4; i++) { FoodsBean fb = new FoodsBean(); fb.setName("测试菜品" + i); fb.setPrice("90.00"); fb.setNumber("1" + i); fb.setSum("10" + i + ".00"); foodsBean.add(fb); } } } 附：小票中菜品的Bean类
public class FoodsBean { private String name; private String price; private String number; private String sum; public String getName() { return name; } public void setName(String name) { this.name = name; } public String getPrice() { return price; } public void setPrice(String price) { this.price = price; } public String getNumber() { return number; } public void setNumber(String number) { this.number = number; } public String getSum() { return sum; } public void setSum(String sum) { this.sum = sum; } } 打印小票样品如图：
小结：
对于调用打印机，不论使用Java语言还是其他语言，思路都是一样的，利用Socket连接上打印机以后，通过IO流进行输出打印，它们的打印指令都是一样的，可以下载打印手册，针对不同的设置，使用不同的打印指令即可。
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持武林网。
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