Android进阶——安卓调用ESC/POS打印机打印实例

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。

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