最近公司对接好多打印机，最后找到佳博。对接的时候有很多的坑，在没有技术对接的情况下我只能一个一个坑的探
首先有必要讲明一下必须完成和注重的地方
准备工作（必要）
主要是文档上说的，看文档真的很有必要。
1-sdk大致分为两部分，打印机与客显,不使用客显可以不添加so。如果只考虑打印就只把libs文件的jar拷贝的自己的项目
同样这也是我要实现的部分。
2-注册服务和权限
<?xml version="1.0" encoding="utf-8"?><manifest xmlns:android="/apk/res/android"package="com.sample"android:versionCode="1"android:versionName="1.0" ><uses-sdkandroid:minSdkVersion="14"android:targetSdkVersion="22" /><uses-permission android:name="android.permission.READ_PHONE_STATE" /><uses-permission android:name="android.permission.ACCESS_WIFI_STATE" /><uses-permission android:name="android.permission.INTERNET" /><uses-permission android:name="android.permission.BLUETOOTH_ADMIN" /><uses-permission android:name="android.permission.BLUETOOTH" /><uses-permission android:name="android.hardware.usb.accessory" /><uses-permission android:name="android.permission.WAKE_LOCK" /><uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" /><uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" /><uses-permission android:name="android.permission.MOUNT_UNMOUNT_FILESYSTEMS" /><uses-permission android:name="android.permission.GET_TASKS" /><uses-permission android:name="android.permission.CHANGE_WIFI_STATE" /><uses-permission android:name="android.permission.CHANGE_NETWORK_STATE" /><uses-permission android:name="android.permission.WRITE_SETTINGS" /><uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" /><uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" /><uses-feature android:name="android.hardware.usb.host" /><applicationandroid:allowBackup="true"android:icon="@drawable/launcher"android:label="@string/app_name"android:theme="@style/AppTheme" ><serviceandroid:name="com.gprinter.service.GpPrintService"android:enabled="true"android:exported="true"android:label="GpPrintService" ><intent-filter><action android:name="com.gprinter.aidl.GpPrintService" /></intent-filter></service><service android:name="com.gprinter.service.AllService" ></service></application></manifest>
3-添加aidl 文件
其内容大致为
package com.gprinter.aidl;interface GpService{int openPort(int PrinterId,int PortType,String DeviceName,int PortNumber);void closePort(int PrinterId);int getPrinterConnectStatus(int PrinterId);int printeTestPage(int PrinterId);void queryPrinterStatus(int PrinterId,int Timesout,int requestCode);int getPrinterCommandType(int PrinterId);int sendEscCommand(int PrinterId, String b64);int sendLabelCommand(int PrinterId, String b64);void isUserExperience(boolean userExperience);String getClientID();int setServerIP(String ip, int port);}
4-启动并绑定PrinterPrintService 服务
private PrinterServiceConnection conn = null;class PrinterServiceConnection implements ServiceConnection {@Overridepublic void onServiceDisconnected(ComponentName name) {Log.i("ServiceConnection", "onServiceDisconnected() called");mGpService = null;}@Overridepublic void onServiceConnected(ComponentName name, IBinder service) {mGpService = GpService.Stub.asInterface(service);}}@Overridepublic void onCreate(Bundle savedInstanceState) {conn = new PrinterServiceConnection();Intent intent = new Intent(this, GpPrintService.class);bindService(intent, conn, Context.BIND_AUTO_CREATE); // bindService}
5-使用打印服务
到了这一步我就开始跳坑了，一步两步似魔鬼的步伐，我就开始一步一步把自己遇到的坑的解决方法贴出来
1、USB打印调用int openPort(int PrinterId,int PortType,String DeviceName,int PortNumber);
该接口的作用主要是打开客户端打开客户端与打印机通讯端口，该接口会通过广播返回PrinterId的打印机的连接状态。这就是我遇到的第一个坑，如果仔细看文档的朋友可以看到‘DeviceName’该字段需要获取USB链接设备的名字的
我该怎么获得呢，静下心深挖以后，终于找到了方法。
/*** 获取USB打印机的名字** @return 返回的打印设备的名字， noDevices：没有获取到任何打印设备*/private String getUsbDevices() {String usbname = "";UsbManager manager = (UsbManager) context.getSystemService(Context.USB_SERVICE);HashMap<String, UsbDevice> devices = manager.getDeviceList();Iterator<UsbDevice> deviceIterator = devices.values().iterator();int count = devices.size();Log.d(DEBUG_TAG, "count " + count);if (count > 0) {while (deviceIterator.hasNext()) {UsbDevice device = deviceIterator.next();String devicename = device.getDeviceName();if (checkUsbDevicePidVid(device)) {Log.e(DEBUG_TAG, "DevicesName " + devicename);usbname = devicename;}}} else {Log.e(DEBUG_TAG, "noDevices ");usbname = "noDevices";}return usbname;}/*** 判断是否是USB打印机** @param dev* @return*/private boolean checkUsbDevicePidVid(UsbDevice dev) {int pid = dev.getProductId();int vid = dev.getVendorId();boolean rel = false;if ((vid == 34918 && pid == 256) || (vid == 1137 && pid == 85) || (vid == 6790 && pid == 30084) || (vid == 26728 && pid == 256) || (vid == 26728 && pid == 512) || (vid == 26728 && pid == 256) || (vid == 26728 && pid == 768) || (vid == 26728 && pid == 1024) || (vid == 26728 && pid == 1280) || (vid == 26728 && pid == 1536)) {rel = true;}ret
链接打印机
class PrinterServiceConnection implements ServiceConnection {
@Override
public void onServiceDisconnected(ComponentName name) {
Log.i(DEBUG_TAG, "onServiceDisconnected() called");mGpService = null;}@Overridepublic void onServiceConnected(ComponentName name, IBinder service) {mGpService = GpService.Stub.asInterface(service);initUSBDevices();}}/*** 启动打印服务*/public void connection() {conn = new PrinterServiceConnection();Log.i(DEBUG_TAG, "connection");Intent intent = new Intent(context, GpPrintService.class);context.bindService(intent, conn, Context.BIND_AUTO_CREATE); // bindService}/*** 链接USB打印设备*/private void initUSBDevices() {int rel = 0;if (TextUtils.isEmpty(DeviceName)) {if (DeviceName.equals("noDevices")) showToast("请检查打印机设备是否连接");return;}try {rel = mGpService.openPort(PrinterId, PortParameters.USB, DeviceName, 0);GpCom.ERROR_CODE r = GpCom.ERROR_CODE.values()[rel];switch (r) {case SUCCESS://正常Log.e(DEBUG_TAG, "正常");break;case FAILED://失败Log.e(DEBUG_TAG, "失败");break;case TIMEOUT:// 超时Log.e(DEBUG_TAG, "超时");break;case INVALID_DEVICE_PARAMETERS://无效的参数Log.e(DEBUG_TAG, "无效的参数");break;case DEVICE_ALREADY_OPEN://端口已经打开Log.e(DEBUG_TAG, "端口已经打开");break;case INVALID_PORT_NUMBER://无效的端口号Log.e(DEBUG_TAG, "无效的端口号");break;case INVALID_IP_ADDRESS://无效的 ip 地址Log.e(DEBUG_TAG, "无效的 ip 地址");break;case INVALID_CALLBACK_OBJECT://无效的回调Log.e(DEBUG_TAG, "无效的回调");break;case BLUETOOTH_IS_NOT_SUPPORT://设备不支持蓝牙Log.e(DEBUG_TAG, "设备不支持蓝牙");break;case OPEN_BLUETOOTH: //请打开蓝牙Log.e(DEBUG_TAG, "请打开蓝牙");break;case PORT_IS_NOT_OPEN://端口未打开Log.e(DEBUG_TAG, "端口未打开");break;case INVALID_BLUETOOTH_ADDRESS://无效的蓝牙地址Log.e(DEBUG_TAG, "无效的蓝牙地址");break;case PORT_IS_DISCONNECT://端口连接断开Log.e(DEBUG_TAG, "端口连接断开");break;}} catch (RemoteException e) {e.printStackTrace();}}
这样基本上就已经链接上打印设备了你就可以调用打印设备了。这些方法基本上我都卸载 PrinterUtils中，有什么的不明白的可以下载下来dome看一下
dome地址
