android wifi连接打印机并获取打印机状态
来源：互联网 发布：韩国历史课本 知乎 编辑：程序博客网 时间：2024/04/26 11:40
最近在做wifi连接打印机打印小票.如何获取打印机的状态是个问题,简单的写一下大家可以参考一下. /** * 获取打印机状态 * @return */ public String getPosStatus() { try { Socket sock = new Socket(ip, 4000); // ip and port of printer sock.setSoTimeout(1000); OutputStream outStream = sock.getOutputStream(); outStream.write(new byte[]{0x1B, 0x76}); outStream.flush(); InputStream stream = sock.getInputStream(); byte[] bytes = new byte[4]; stream.read(bytes); Message msg = new Message(); stream.close(); outStream.close(); sock.close(); return bytes[0] + "," + bytes[1] + "," + bytes[2] + "," + bytes[3] + ","; } catch (UnknownHostException e) { Message msg = new Message(); e.printStackTrace(); } catch (IOException e) { Message msg = new Message(); e.printStackTrace(); } return "error"; }看一下我的打印工具类
package com.example.kingprintdemo;import android.os.Message;import android.util.Log;import java.io.DataOutputStream;import java.io.IOException;import java.io.InputStream;import java.io.OutputStream;import java.io.OutputStreamWriter;import java.net.Socket;import java.net.UnknownHostException;public class Pos { //定义编码方式 private static String encoding = null; private String ip; 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) { try { this.ip = ip; boolean isSocketConnect = false; if (sock != null) { closeIOAndSocket(); } else { sock = new Socket(ip, port); } sock.setSoTimeout(1000 * 3); socketOut = new DataOutputStream(sock.getOutputStream()); this.encoding = encoding; writer = new OutputStreamWriter(socketOut, encoding); isSocketConnect = true; } catch (Exception e) { Log.e("king", e.toString()); } } /** * 获取打印机状态 * @return */ public String getPosStatus() { try { Socket sock = new Socket(ip, 4000); // ip and port of printer sock.setSoTimeout(1000); OutputStream outStream = sock.getOutputStream(); outStream.write(new byte[]{0x1B, 0x76}); outStream.flush(); InputStream stream = sock.getInputStream(); byte[] bytes = new byte[4]; stream.read(bytes); Message msg = new Message(); stream.close(); outStream.close(); sock.close(); return bytes[0] + "," + bytes[1] + "," + bytes[2] + "," + bytes[3] + ","; } catch (UnknownHostException e) { Message msg = new Message(); e.printStackTrace(); } catch (IOException e) { Message msg = new Message(); e.printStackTrace(); } return "error"; } /** * 关闭IO流和Socket * * @throws IOException */ public void closeIOAndSocket() { try { writer.close(); socketOut.close(); sock.close(); } catch (Exception e) { } } /** * 判断socket连接状态 */ public boolean isSocketConnect() throws IOException { boolean connected = sock.isConnected(); return connected; } /** * 打印二维码 * * @param qrData 二维码的内容 * @throws IOException */ public 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 * * @throws IOException */ public 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 */ public 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 */ public 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 */ public 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 */ public 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 */ public void printLocation(int position) throws IOException { writer.write((char) 27); writer.write((char) 97); writer.write((char) position); writer.flush(); } /** * 绝对打印位置 * * @throws IOException */ public 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 */ public 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 */ public 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 */ public void initPos() throws IOException { writer.write(0x1B); writer.write(0x40); writer.flush(); } /** * 加粗 * * @param flag false为不加粗 * @return * @throws IOException */ public 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(); } } public void fontSize(int size) throws IOException { writer.write(CMD_FontSize(size)); writer.flush(); } /** * 睡几秒 */ private void sleep(int time) throws InterruptedException { Thread.sleep(time); } /** * 打开钱箱 */ public void openCashBox() throws IOException { writer.write(0x1B); writer.write(0x70); writer.write(0); writer.write(100); writer.write(80); writer.flush(); } /// <summary> /// 字体的大小 /// </summary> /// <param name="nfontsize">0:正常大小 1:两倍高 2:两倍宽 3:两倍大小 4:三倍高 5:三倍宽 6:三倍大小 7:四倍高 8:四倍宽 9:四倍大小 10:五倍高 11:五倍宽 12:五倍大小</param> /// <returns></returns> public String CMD_FontSize(int nfontsize) { String _cmdstr = ""; //设置字体大小 switch (nfontsize) { case -1: _cmdstr = new StringBuffer().append((char) 29).append((char) 33).append((char) 0).toString();//29 33 break; case 0: _cmdstr = new StringBuffer().append((char) 29).append((char) 33).append((char) 0).toString();//29 33 break; case 1: _cmdstr = new StringBuffer().append((char) 29).append((char) 33).append((char) 1).toString(); break; case 2: _cmdstr = new StringBuffer().append((char) 29).append((char) 33).append((char) 16).toString(); break; case 3: _cmdstr = new StringBuffer().append((char) 29).append((char) 33).append((char) 17).toString(); break; case 4: _cmdstr = new StringBuffer().append((char) 29).append((char) 33).append((char) 2).toString(); break; case 5: _cmdstr = new StringBuffer().append((char) 29).append((char) 33).append((char) 32).toString(); break; case 6: _cmdstr = new StringBuffer().append((char) 29).append((char) 33).append((char) 34).toString(); break; case 7: _cmdstr = new StringBuffer().append((char) 29).append((char) 33).append((char) 3).toString(); break; case 8: _cmdstr = new StringBuffer().append((char) 29).append((char) 33).append((char) 48).toString(); break; case 9: _cmdstr = new StringBuffer().append((char) 29).append((char) 33).append((char) 51).toString(); break; case 10: _cmdstr = new StringBuffer().append((char) 29).append((char) 33).append((char) 4).toString(); break; case 11: _cmdstr = new StringBuffer().append((char) 29).append((char) 33).append((char) 64).toString(); break; case 12: _cmdstr = new StringBuffer().append((char) 29).append((char) 33).append((char) 68).toString(); break; } return _cmdstr; }} 0 1
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