大佬教程收集整理的这篇文章主要介绍了Android下的POS打印机调用的简单实现,大佬教程大佬觉得挺不错的,现在分享给大家,也给大家做个参考。
本文基于GP58系列,它可以兼容ESC/POS指令集,对EPSON的打印机通用.
Android下的设备调试,如果设备提供了驱动,按照厂家的驱动调试即可;设备未提供驱动,只能按照通用的方法进行调试。这里采用的是调用USB接口来控制打印机输出。
public UsbAdmin(Context context) { mUsbManager = (UsbManager) context.getSystemservice(Context.USB_serviCE); mPermissionIntent = PendingIntent.getBroadcast(context,new Intent(ACTION_USB_PERMISSION),0); IntentFilter filter = new IntentFilter(ACTION_USB_PERMISSION); context.registerReceiver(mUsbReceiver,filter); }@H_404_10@
使用一个延迟意图来接收usb接入时的广播,当广播接收到时,说明有新的设备接入。@H_607_5@
private final BroadcastReceiver mUsbReceiver = new BroadcastReceiver() { public void onReceive(Context context,Intent intent) { String action = intent.getAction(); if (ACTION_USB_PERMISSION.equals(action)) { synchronized (this) { UsbDevice device = (UsbDevicE) intent.getParcelableExtra(UsbManager.EXTRA_DEVICE); if (intent.getBooleanExtra(UsbManager.EXTRA_PERMISSION_GRANTED,falsE)) { if (device != null) { setDevice(devicE); } else { Closeusb(); // mDevice = device; } } else { Log.d(tag,"permission denied for device " + devicE); } } } } };@H_404_10@
取到usb设备的引用,android系统会询问你是否允许设备访问,默认为false;当允许了访问之后,会判断USB的引用是否为null,如果不为空则会调用setDevice来创建一个Connection,否则会关闭本次连接。@H_607_5@
在setDevice中,我们可以获取设备的功能集(UsbInterface),也可以获取通信通道(UsbEndpoint),同时也创建了host与device的连接用来传输数据。@H_607_5@
private void setDevice(UsbDevice devicE) { if (device != null) { UsbInterfacE intf = null; UsbEndpoint ep = null; int InterfaceCount = device.geTinterfaceCount(); int j; mDevice = device; for (j = 0; j < InterfaceCount; j++) { int i; intf = device.geTinterface(j); Log.i(tag,"接口是:" + j + "类是:" + intf.geTinterfaceClass()); if (intf.geTinterfaceClass() == 7) { int UsbEndpointCount = intf.getEndpointCount(); for (i = 0; i < UsbEndpointCount; i++) { ep = intf.getEndpoint(i); Log.i(tag,"端点是:" + i + "方向是:" + ep.getDirection() + "类型是:" + ep.getType()); if (ep.getDirection() == 0 && ep.getType() == UsbConstantS.USB_ENDPOINT_XFER_BULK) { Log.i(tag,"接口是:" + j + "端点是:" + i); break; } } if (i != UsbEndpointCount) { break; } } } if (j == InterfaceCount) { Log.i(tag,"没有打印机接口"); return; } mEndpoinTintr = ep; UsbDeviceConnection connection = mUsbManager.openDevice(devicE); if (connection != null && connection.claimInterface(intf,truE)) { Log.i(tag,"打开成功! "); mConnection = connection; } else { Log.i(tag,"打开失败! "); mConnection = null; } } }@H_404_10@
2.在相关的类中新建一个UsbAdmin,调用openUsb,这里首先是走了上面的setDevice()方法,获取到了设备的引用,当连接通道建立时列出所有USB设备,当设备的引用不存在时同样列出所有的USB设备,并且都请求获取USB权限。
public void openUsb() { if (mDevice != null) { setDevice(mDevicE); if (mConnection == null) { HashMap<String,UsbDevice> deviceList = mUsbManager.getDeviceList(); Iterator<UsbDevice> deviceIterator = deviceList.values().iterator(); while (deviceIterator.hasNext()) { UsbDevice device = deviceIterator.next(); mUsbManager.requestPermission(device,mPermissionIntent); } } } else { HashMap<String,UsbDevice> deviceList = mUsbManager.getDeviceList(); Iterator<UsbDevice> deviceIterator = deviceList.values().iterator(); while (deviceIterator.hasNext()) { UsbDevice device = deviceIterator.next(); mUsbManager.requestPermission(device,mPermissionIntent); } } }@H_404_10@
3.当上面两部都走完了之后,我们就可以发送指令来控制已经建立连接的打印机了,这里我们使用的是标准的ESC/POS指令集,为硬件默认,贴出代码,这里的指令集采用的是十进制表示形式,也可以替换成十六进制。
public class printerCmdUtils { /** * 这些数据源自爱普生指令集,为POS机硬件默认 */ public static final byte ESC = 27;//换码 public static final byte FS = 28;//文本分隔符 public static final byte GS = 29;//组分隔符 public static final byte DLE = 16;//数据连接换码 public static final byte EOT = 4;//传输结束 public static final byte ENQ = 5;//询问字符 public static final byte SP = 32;//空格 public static final byte HT = 9;//横向列表 public static final byte LF = 10;//打印并换行(水平定位) public static final byte CR = 13;//归位键 public static final byte FF = 12;//走纸控制(打印并回到标准模式(在页模式下) ) public static final byte CAN = 24;//作废(页模式下取消打印数据 ) //------------------------打印机初始化----------------------------- /** * 打印机初始化 * @return */ public static byte[] init_printer() { byte[] result = new byte[2]; result[0] = ESc; result[1] = 64; return result; } //------------------------换行----------------------------- /** * 换行 * @param lineNum要换几行 * @return */ public static byte[] nextLine(int lineNum) { byte[] result = new byte[lineNum]; for(int i=0;i<lineNum;i++) { result[i] = LF; } return result; } //------------------------下划线----------------------------- /** * 绘制下划线(1点宽) * @return */ public static byte[] underlineWithOneDotWidthOn() { byte[] result = new byte[3]; result[0] = ESc; result[1] = 45; result[2] = 1; return result; } /** * 绘制下划线(2点宽) * @return */ public static byte[] underlineWithTwoDotWidthOn() { byte[] result = new byte[3]; result[0] = ESc; result[1] = 45; result[2] = 2; return result; } /** * 取消绘制下划线 * @return */ public static byte[] underlineOff() { byte[] result = new byte[3]; result[0] = ESc; result[1] = 45; result[2] = 0; return result; } //------------------------加粗----------------------------- /** * 选择加粗模式 * @return */ public static byte[] boldOn() { byte[] result = new byte[3]; result[0] = ESc; result[1] = 69; result[2] = 0xF; return result; } /** * 取消加粗模式 * @return */ public static byte[] boldOff() { byte[] result = new byte[3]; result[0] = ESc; result[1] = 69; result[2] = 0; return result; } //------------------------对齐----------------------------- /** * 左对齐 * @return */ public static byte[] alignLeft() { byte[] result = new byte[3]; result[0] = ESc; result[1] = 97; result[2] = 0; return result; } /** * 居中对齐 * @return */ public static byte[] alignCenter() { byte[] result = new byte[3]; result[0] = ESc; result[1] = 97; result[2] = 1; return result; } /** * 右对齐 * @return */ public static byte[] alignRight() { byte[] result = new byte[3]; result[0] = ESc; result[1] = 97; result[2] = 2; return result; } /** * 水平方向向右移动col列 * @param col * @return */ public static byte[] set_HT_position( byte col ) { byte[] result = new byte[4]; result[0] = ESc; result[1] = 68; result[2] = col; result[3] = 0; return result; } //------------------------字体变大----------------------------- /** * 字体变大为标准的n倍 * @param num * @return */ public static byte[] fontSizeSetBig(int num) { byte realSize = 0; switch (num) { case 1: realSize = 0;break; case 2: realSize = 17;break; case 3: realSize = 34;break; case 4: realSize = 51;break; case 5: realSize = 68;break; case 6: realSize = 85;break; case 7: realSize = 102;break; case 8: realSize = 119;break; } byte[] result = new byte[3]; result[0] = 29; result[1] = 33; result[2] = realSize; return result; } //------------------------字体变小----------------------------- /** * 字体取消倍宽倍高 * @param num * @return */ public static byte[] fontSizeSetsmall(int num) { byte[] result = new byte[3]; result[0] = ESc; result[1] = 33; return result; } //------------------------切纸----------------------------- /** * 进纸并全部切割 * @return */ public static byte[] FeedPaperCutAll() { byte[] result = new byte[4]; result[0] = GS; result[1] = 86; result[2] = 65; result[3] = 0; return result; } /** * 进纸并切割(左边留一点不切) * @return */ public static byte[] FeedPaperCutPartial() { byte[] result = new byte[4]; result[0] = GS; result[1] = 86; result[2] = 66; result[3] = 0; return result; } //------------------------切纸----------------------------- public static byte[] byteMerger(byte[] byte_1,byte[] byte_2){ byte[] byte_3 = new byte[byte_1.length+byte_2.length]; System.arraycopy(byte_1,byte_3,byte_1.length); System.arraycopy(byte_2,byte_1.length,byte_2.length); return byte_3; } public static byte[] byteMerger(byte[][] byteList){ int length = 0; for(int i=0;i<byteList.length;i++) { length += byteList[i].length; } byte[] result = new byte[length]; int index = 0; for(int i=0;i<byteList.length;i++) { byte[] NowByte = byteList[i]; for(int k=0;k<byteList[i].length;k++) { result[index] = NowByte[k]; index++; } } return result; } }@H_404_10@
4.在以上都完成之后,就可以把你需要的字符串转换成byte数组并调用sendCommand方法来进行打印了
@SuppressLint("NewApi") public Boolean sendCommand(byte[] Content) { Boolean Result; synchronized (this) { int len = -1; if (mConnection != null) { len = mConnection.bulkTransfer(mEndpoinTintr,Content,Content.length,10000); } if (len < 0) { Result = false; Log.i(tag,"发送失败! " + len); } else { Result = true; Log.i(tag,"发送" + len + "字节数据"); } } return Result;@H_404_10@
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