WeX5 3.8开发工具之蓝牙打印(全流程记录不是最全,胜似最全)

技术分享

记录踩过的坑和别的大佬没有叽歪的点

开始做蓝牙打印看到网上很多做混合开发和安卓开发,ios开发的例子,插件等等版本大同小异,并不是像其他博客上所说的那么简单,[下载插件,无需改动,连接打印开始,图片为证],没那么简单.往往困扰我们没有进行下去的是细节,那么

为了能让小伙伴们少走弯路我来分享一下吧,

这个插件很多随便下载一个列表,连接,打印断连这四个功能

蓝牙打印插件下载

插件放在软件目录 WeX5_V3.8\model\Native\plugins 下

插件内java文件可以手动修改根据自己的需要, 有的需要改写蓝牙连接功能, new一个线程去连接,我这里没有new,连接需要时间, 可能会报错 read failed,socket might closed or timeout,read ret:-1

java

package cordova.plugin.bluetooth.printer;import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.Hashtable;
import java.util.Set;
import java.util.UUID;import org.apache.cordova.CallbackContext;
import org.apache.cordova.CordovaPlugin;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;import android.bluetooth.BluetoothAdapter;
import android.bluetooth.BluetoothDevice;
import android.bluetooth.BluetoothSocket;
import android.content.Intent;
import android.os.Handler;
import android.util.Log;import android.content.Context;public class BluetoothPrinter extends CordovaPlugin {private static final String LOG_TAG = "BluetoothPrinter";BluetoothAdapter mBluetoothAdapter;BluetoothSocket mmSocket;BluetoothDevice mmDevice;OutputStream mmOutputStream;InputStream mmInputStream;Thread workerThread;byte[] readBuffer;int readBufferPosition;int counter;volatile boolean stopWorker;public BluetoothPrinter() {}@Overridepublic boolean execute(String action, JSONArray args, CallbackContext callbackContext) throws JSONException {if (action.equals("list")) {listBT(callbackContext);////return true;} else if (action.equals("connect")) {String name = args.getString(0);if (findBT(callbackContext, name)) {try {connectBT(callbackContext);} catch (IOException e) {Log.e(LOG_TAG, e.getMessage());e.printStackTrace();}} else {callbackContext.error("Bluetooth Device Not Found: " + name);}return true;} else if (action.equals("disconnect")) {try {disconnectBT(callbackContext);} catch (IOException e) {Log.e(LOG_TAG, e.getMessage());e.printStackTrace();}return true;}else if (action.equals("print")) {try {String msg = args.getString(0);print(callbackContext, msg);} catch (IOException e) {Log.e(LOG_TAG, e.getMessage());e.printStackTrace();}return true;}else if (action.equals("printPOSCommand")) {try {String msg = args.getString(0);printPOSCommand(callbackContext, hexStringToBytes(msg));} catch (IOException e) {Log.e(LOG_TAG, e.getMessage());e.printStackTrace();}return true;}return false;}//This will return the array list of paired bluetooth printersvoid listBT(CallbackContext callbackContext) {BluetoothAdapter mBluetoothAdapter = null;String errMsg = null;try {mBluetoothAdapter = BluetoothAdapter.getDefaultAdapter();if (mBluetoothAdapter == null) {errMsg = "No bluetooth adapter available";Log.e(LOG_TAG, errMsg);callbackContext.error(errMsg);return;}if (!mBluetoothAdapter.isEnabled()) {Intent enableBluetooth = new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE);this.cordova.getActivity().startActivityForResult(enableBluetooth, 0);}Set<BluetoothDevice> pairedDevices = mBluetoothAdapter.getBondedDevices();if (pairedDevices.size() > 0) {JSONArray json = new JSONArray();for (BluetoothDevice device : pairedDevices) {/*Hashtable map = new Hashtable();map.put("type", device.getType());map.put("address", device.getAddress());map.put("name", device.getName());JSONObject jObj = new JSONObject(map);*/json.put(device.getName());}callbackContext.success(json);} else {callbackContext.error("No Bluetooth Device Found");}//Log.d(LOG_TAG, "Bluetooth Device Found: " + mmDevice.getName());} catch (Exception e) {errMsg = e.getMessage();Log.e(LOG_TAG, errMsg);e.printStackTrace();callbackContext.error(errMsg);}}// This will find a bluetooth printer deviceboolean findBT(CallbackContext callbackContext, String name) {try {mBluetoothAdapter = BluetoothAdapter.getDefaultAdapter();if (mBluetoothAdapter == null) {Log.e(LOG_TAG, "No bluetooth adapter available");}if (!mBluetoothAdapter.isEnabled()) {Intent enableBluetooth = new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE);this.cordova.getActivity().startActivityForResult(enableBluetooth, 0);}Set<BluetoothDevice> pairedDevices = mBluetoothAdapter.getBondedDevices();if (pairedDevices.size() > 0) {for (BluetoothDevice device : pairedDevices) {if (device.getName().equalsIgnoreCase(name)) {mmDevice = device;return true;}}}Log.d(LOG_TAG, "Bluetooth Device Found: " + mmDevice.getName());} catch (Exception e) {String errMsg = e.getMessage();Log.e(LOG_TAG, errMsg);e.printStackTrace();callbackContext.error(errMsg);}return false;}// Tries to open a connection to the bluetooth printer deviceboolean connectBT(CallbackContext callbackContext) throws IOException {try {// Standard SerialPortService IDUUID uuid = UUID.fromString("00001101-0000-1000-8000-00805f9b34fb");mmSocket = mmDevice.createRfcommSocketToServiceRecord(uuid);//String cmd="Qsprinter";//PrintService.pl.connect(cmd);mmSocket.connect();mmOutputStream = mmSocket.getOutputStream();mmInputStream = mmSocket.getInputStream();beginListenForData();//Log.d(LOG_TAG, "Bluetooth Opened: " + mmDevice.getName());callbackContext.success("Bluetooth Opened: " + mmDevice.getName());//callbackContext.success("Bluetooth Opened: " + "ceshi_shebei");return true;} catch (Exception e) {String errMsg = e.getMessage();Log.e(LOG_TAG, errMsg);e.printStackTrace();callbackContext.error(errMsg);}return false;}// After opening a connection to bluetooth printer device, // we have to listen and check if a data were sent to be printed.void beginListenForData() {try {final Handler handler = new Handler();// This is the ASCII code for a newline characterfinal byte delimiter = 10;stopWorker = false;readBufferPosition = 0;readBuffer = new byte[1024];workerThread = new Thread(new Runnable() {public void run() {while (!Thread.currentThread().isInterrupted() && !stopWorker) {try {int bytesAvailable = mmInputStream.available();if (bytesAvailable > 0) {byte[] packetBytes = new byte[bytesAvailable];mmInputStream.read(packetBytes);for (int i = 0; i < bytesAvailable; i++) {byte b = packetBytes[i];if (b == delimiter) {byte[] encodedBytes = new byte[readBufferPosition];System.arraycopy(readBuffer, 0, encodedBytes, 0, encodedBytes.length);/*final String data = new String(encodedBytes, "US-ASCII");readBufferPosition = 0;handler.post(new Runnable() {public void run() {myLabel.setText(data);}});*/} else {readBuffer[readBufferPosition++] = b;}}}} catch (IOException ex) {stopWorker = true;}}}});workerThread.start();} catch (NullPointerException e) {e.printStackTrace();} catch (Exception e) {e.printStackTrace();}}//This will send data to bluetooth printerboolean print(CallbackContext callbackContext, String msg) throws IOException {try {//mmOutputStream.write(new byte[] { 0x1b, 0x74,0x15 });//后添加//mmOutputStream.write(msg.getBytes());mmOutputStream.write(msg.getBytes("GBK"));//防止中文打印乱码//mmOutputStream.write(new byte[] { 0x1d, 0x0c });//后添加/*String message="20160825888";if (message.length() > 0) {byte[] btdata=null;try {btdata=message.getBytes("ASCII");} catch (UnsupportedEncodingException e) {// TODO Auto-generated catch blocke.printStackTrace();}//Enable the barcodemmOutputStream.write(new byte[]{0x1d,0x45,0x43,0x01});//Set the barcode height is 162mmOutputStream.write(new byte[]{0x1d,0x68,(byte) 0xa2});//Set HRI character print location on bottommmOutputStream.write(new byte[]{0x1d,0x48,0x02});mmOutputStream.write(new byte[]{0x1d,0x77,0x02});//Print the barcode use code128byte[] qrHead=new byte[]{0x1d,0x6b,0x49,(byte) btdata.length};
//              byte[] qrHead=new byte[]{0x1d,0x6b,0x44,(byte) btdata.length};byte[] barCodeData=new byte[qrHead.length+btdata.length];System.arraycopy(qrHead, 0, barCodeData, 0, qrHead.length);System.arraycopy(btdata, 0, barCodeData, qrHead.length, btdata.length);mmOutputStream.write(barCodeData);mmOutputStream.write(new byte[] { 0x1d, 0x0c });//mmOutputStream.printText("\r\n");//               Bitmap btMap = BarcodeCreater.creatBarcode(PrintBarCodeActivity.this,
//                      message, 384, 100, true, 1);
//              PrintService.pl.printImage(btMap);
//              PrintService.pl.write(new byte[] { 0x1d, 0x0c });}//结束*///mmOutputStream.write(new byte[] { 0x1b, 0x74,0x15 });////mmOutputStream.write(msg.getBytes("UTF-8"));//mmOutputStream.write(new byte[] { 0x1d, 0x0c });///*mmOutputStream.write(new byte[] { 0x1b, 0x74,0x15 });////mmOutputStream.write(msg.getBytes());mmOutputStream.write(msg.getBytes("GBK"));//防止中文打印乱码mmOutputStream.write(new byte[] { 0x1d, 0x0c });//*/// tell the user data were sent//Log.d(LOG_TAG, "Data Sent");callbackContext.success("Data Sent success");return true;} catch (Exception e) {String errMsg = e.getMessage();Log.e(LOG_TAG, errMsg);e.printStackTrace();callbackContext.error(errMsg);}return false;}boolean printPOSCommand(CallbackContext callbackContext, byte[] buffer) throws IOException {try {mmOutputStream.write(buffer);// tell the user data were sentLog.d(LOG_TAG, "Data Sent");callbackContext.success("Data Sent");return true;} catch (Exception e) {String errMsg = e.getMessage();Log.e(LOG_TAG, errMsg);e.printStackTrace();callbackContext.error(errMsg);}return false;}// disconnect bluetooth printer.boolean disconnectBT(CallbackContext callbackContext) throws IOException {try {stopWorker = true;mmOutputStream.close();mmInputStream.close();mmSocket.close();callbackContext.success("Bluetooth Disconnect");return true;} catch (Exception e) {String errMsg = e.getMessage();Log.e(LOG_TAG, errMsg);e.printStackTrace();callbackContext.error(errMsg);}return false;}public byte[] getText(String textStr) {// TODO Auto-generated method stubbyte[] send;byte[] send=null;try {send = textStr.getBytes("GBK");} catch (UnsupportedEncodingException e) {send = textStr.getBytes();}return send;}public static byte[] hexStringToBytes(String hexString) {hexString = hexString.toLowerCase();String[] hexStrings = hexString.split(" ");byte[] bytes = new byte[hexStrings.length];for (int i = 0; i < hexStrings.length; i++) {char[] hexChars = hexStrings[i].toCharArray();bytes[i] = (byte) (charToByte(hexChars[0]) << 4 | charToByte(hexChars[1]));}return bytes;}private static byte charToByte(char c) {return (byte) "0123456789abcdef".indexOf(c);}}

var exec = require('cordova/exec');var BTPrinter = {list: function(fnSuccess, fnError){exec(fnSuccess, fnError, "BluetoothPrinter", "list", []);},connect: function(fnSuccess, fnError, name){exec(fnSuccess, fnError, "BluetoothPrinter", "connect", [name]);},disconnect: function(fnSuccess, fnError){exec(fnSuccess, fnError, "BluetoothPrinter", "disconnect", []);},print: function(fnSuccess, fnError, str){exec(fnSuccess, fnError, "BluetoothPrinter", "print", [str]);},printPOSCommand: function(fnSuccess, fnError, str){exec(fnSuccess, fnError, "BluetoothPrinter", "printPOSCommand", [str]);}
};module.exports = BTPrinter;

示例下载

//蓝牙打印Model.prototype.btClick = function(event){debugger;var strCmd1 = "T 12 2 0 10 12号字体测试\n";//文本var strCmd2 = addCPCLQRCode(0,40,'M', 2, 5, "12号中文字二维码测试");//二维码         var strCmd3 = addCPCLBarCode(150,10,'128',50,0,1,1,'123456');//条形码var strCmd4 = "T 12 2 180 70 123456\n";//文本var byte2 = "! 0 200 200 300 1\n" //这是开始代码+strCmd1+strCmd2+strCmd3+strCmd4+"PRINT\n";//这是结束代码//蓝牙打印if( this.blueConect) {var packageID = this.packageID;BTPrinter.print ( function (data){console.log ( "success" ) ;console.log (packageID) ;alert (data) ;},function(err){console.log ( "Error") ;console.log (err);alert (err) ;}, byte2);}};

最后说几个问题

图一

连接蓝牙之前需要用手机的蓝牙模块先连接蓝牙打印机点击蓝牙列表>> 蓝牙连接(3秒左右会连接成功)>>打印

用手机连接蓝牙时也是我被坑的地方这个手没有出现 ble_name,但是不影响我阐述, 看图4图5 打印机有两个蓝牙信号一个name[打印机信号名] 一个ble_name[打印机蓝牙信号名]

咱不知道为啥要两个看图标一个是蓝牙标识,一个是打印机标识两个名字只差一个L字母开始我连接的是带L的信号(蓝牙信号),不用配对密码可以直接连接,打印机也会显示连接成功的信号,

所以没在意一直以为是程序问题功能上只有列表可以用,连接打印都无法使用,就是因为当初输了1234没成功所以固执的认为这个是给配对用的参考,就没有输入0000,

其实0000才是配对密码,打印不需要输入配对是默认的,只要在手机一方输入即可配对成功,后来才知道要用带打印机图标的信号,程序没有问题,是信号选择的问题.每一个细节都肯能困扰你打印失败,让你排错的方向走叉

总结一下,1插件名错误,

2,修改插件要重新编译打包

3.cordova 基本插件引入

4.测试最好单开app 减少干扰项,后期排错方便

5.打印机说明书

6.打印机信号都试试

7.UI2 打包网络网速影响app

8.打印纸安装

9.打印距离

10.手机版本4.2以上.

11.蓝牙打印机蓝牙低功耗4.0以上

记着的就这么多,有问题的可以留言,其实功能很简单无非是一些细节没有控制好,知道了就简单的一逼

祝你们好运