android wifi连接打印机并获取打印机状态

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";

}

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;
}

}