找了各方资料，自己写了一个USBPrinter类，代码如下：
public class USBPrinter {
public static final String ACTION_USB_PERMISSION = "com.usb.printer.USB_PERMISSION";
private static USBPrinter mInstance;
private Context mContext;
private PendingIntent mPermissionIntent;
private UsbManager mUsbManager;
private UsbDeviceConnection mUsbDeviceConnection;
private UsbEndpoint ep,printerEp;
private UsbInterface usbInterface;
private static final int TIME_OUT = 100000;
public static USBPrinter getInstance() {
if (mInstance == null) {
synchronized (USBPrinter.class) {
if (mInstance == null) {
mInstance = new USBPrinter();
}
}
}
return mInstance;
}
/**
* 初始化打印机，需要与destroy对应
*
* @param context 上下文
*/
public static void initPrinter(Context context) {
getInstance().init(context);
}
@TargetApi(Build.VERSION_CODES.LOLLIPOP)
private void init(Context context) {
// list.clear();
mContext = context;
mUsbManager = (UsbManager) mContext.getSystemService(Context.USB_SERVICE);
mPermissionIntent = PendingIntent.getBroadcast(mContext, 0, new Intent(ACTION_USB_PERMISSION), 0);
IntentFilter filter = new IntentFilter(ACTION_USB_PERMISSION);
filter.addAction(UsbManager.ACTION_USB_DEVICE_DETACHED);
filter.addAction(UsbManager.ACTION_USB_DEVICE_ATTACHED);
mContext.registerReceiver(mUsbDeviceReceiver, filter);
// 列出所有的USB设备，并且都请求获取USB权限
HashMap deviceList = mUsbManager.getDeviceList();
for (UsbDevice device : deviceList.values()) {
usbInterface = device.getInterface(0);
if (usbInterface.getInterfaceClass() == 7) {
Log.d("device", device.getProductName() + " " + device.getManufacturerName());
Log.d("device", device.getVendorId() + " " + device.getProductId() + " " + device.getDeviceId());
Log.d("device", usbInterface.getInterfaceClass() + "");
if (!mUsbManager.hasPermission(device)) {
mUsbManager.requestPermission(device, mPermissionIntent);
}else {
connectUsbPrinter(device);
}
}
}
}
private final BroadcastReceiver mUsbDeviceReceiver = new BroadcastReceiver() {
public void onReceive(Context context, Intent intent) {
String action = intent.getAction();
Log.d("action", action);
UsbDevice mUsbDevice = intent.getParcelableExtra(UsbManager.EXTRA_DEVICE);
if (ACTION_USB_PERMISSION.equals(action)) {
synchronized (this) {
if (intent.getBooleanExtra(UsbManager.EXTRA_PERMISSION_GRANTED, false) && mUsbDevice != null) {
Log.d("receiver", action);
connectUsbPrinter(mUsbDevice);
} else {
ToastUtil.showShort(context, "USB设备请求被拒绝");
}
}
} else if (UsbManager.ACTION_USB_DEVICE_DETACHED.equals(action)) {
if (mUsbDevice != null) {
ToastUtil.showShort(context, "有设备拔出");
}
} else if (UsbManager.ACTION_USB_DEVICE_ATTACHED.equals(action)) {
ToastUtil.showShort(context, "有设备插入");
if (mUsbDevice != null) {
if (!mUsbManager.hasPermission(mUsbDevice)) {
mUsbManager.requestPermission(mUsbDevice, mPermissionIntent);
}
}
}
}
};
public void close() {
if(mUsbDeviceConnection != null){
mUsbDeviceConnection.close();
mUsbDeviceConnection = null;
}
mContext.unregisterReceiver(mUsbDeviceReceiver);
mContext = null;
mUsbManager = null;
}
private void connectUsbPrinter(UsbDevice mUsbDevice) {
if (mUsbDevice != null) {
for (int i = 0; i < usbInterface.getEndpointCount(); i++) {
ep = usbInterface.getEndpoint(i);
if (ep.getType() == UsbConstants.USB_ENDPOINT_XFER_BULK) {
if (ep.getDirection() == UsbConstants.USB_DIR_OUT) {
mUsbDeviceConnection = mUsbManager.openDevice(mUsbDevice);
printerEp = ep;
if (mUsbDeviceConnection != null) {
ToastUtil.showShort(mContext, "设备已连接");
mUsbDeviceConnection.claimInterface(usbInterface, true);
mUsbDeviceConnection.releaseInterface(usbInterface);
}
}
}
}
} else {
ToastUtil.showShort(mContext, "未发现可用的打印机");
}
}
private void write(byte[] bytes) {
if (mUsbDeviceConnection != null) {
int b = mUsbDeviceConnection.bulkTransfer(printerEp, bytes, bytes.length, TIME_OUT);
Log.i("Return Status", "b-->" + b);
} else {
Looper.prepare();
handler.sendEmptyMessage(0);
Looper.loop();
}
}
private Handler handler = new Handler() {
@Override
public void handleMessage(Message msg) {
super.handleMessage(msg);
ToastUtil.showShort(mContext, "未发现可用的打印机");
}
};
/**
* 打印文字
* @param msg
*/
public void printText(String msg) {
byte[] bytes = new byte[0];
try {
bytes = msg.getBytes("gbk");
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
}
write(bytes);
}
/**
* 换行打印文字
* @param msg
*/
public void printTextNewLine(String msg) {
byte[] bytes = new byte[0];
try {
bytes = msg.getBytes("gbk");
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
}
write(new String("\n").getBytes());
write(bytes);
}
/**
* 打印空行
* @param size
*/
public void printLine(int size) {
for (int i = 0; i < size; i++) {
printText("\n");
}
}
/**
* 设置字体大小
* @param size 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 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
*/
public void setTextSize(int size) {
write(ESCUtil.setTextSize(size));
}
/**
* 字体加粗
* @param isBold
*/
public void bold(boolean isBold) {
if (isBold) write(ESCUtil.boldOn());
else write(ESCUtil.boldOff());
}
/**
* 打印一维条形码
* @param data
*/
public void printBarCode(String data) {
write(ESCUtil.getPrintBarCode(data, 5, 90, 5, 2));
}
/**
* 设置对齐方式
* @param position
*/
public void setAlign(int position) {
byte[] bytes = null;
switch (position) {
case 0:
bytes = ESCUtil.alignLeft();
break;
case 1:
bytes = ESCUtil.alignCenter();
break;
case 2:
bytes = ESCUtil.alignRight();
break;
}
write(bytes);
}
/**
* 切纸
*/
public void cutPager() {
write(ESCUtil.cutter());
}
}
请自行替换代码里的ToastUtil
里面的ESCUtil是ESC指令工具类，代码如下：
//常用指令封装
public class ESCUtil {
public static final byte ESC = 0x1B;// Escape
public static final byte FS = 0x1C;// Text delimiter
public static final byte GS = 0x1D;// Group separator
public static final byte DLE = 0x10;// data link escape
public static final byte EOT = 0x04;// End of transmission
public static final byte ENQ = 0x05;// Enquiry character
public static final byte SP = 0x20;// Spaces
public static final byte HT = 0x09;// Horizontal list
public static final byte LF = 0x0A;//Print and wrap (horizontal orientation)
public static final byte CR = 0x0D;// Home key
public static final byte FF = 0x0C;// Carriage control (print and return to the standard mode (in page mode))
public static final byte CAN = 0x18;// Canceled (cancel print data in page mode)
//初始化打印机
public static byte[] init_printer() {
byte[] result = new byte[2];
result[0] = ESC;
result[1] = 0x40;
return result;
}
//打印浓度指令
public static byte[] setPrinterDarkness(int value){
byte[] result = new byte[9];
result[0] = GS;
result[1] = 40;
result[2] = 69;
result[3] = 4;
result[4] = 0;
result[5] = 5;
result[6] = 5;
result[7] = (byte) (value >> 8);
result[8] = (byte) value;
return result;
}
/**
* 打印单个二维码 sunmi自定义指令
* @param code: 二维码数据
* @param modulesize: 二维码块大小(单位:点, 取值 1 至 16 )
* @param errorlevel: 二维码纠错等级(0 至 3)
* 0 -- 纠错级别L ( 7%)
* 1 -- 纠错级别M (15%)
* 2 -- 纠错级别Q (25%)
* 3 -- 纠错级别H (30%)
*/
public static byte[] getPrintQRCode(String code, int modulesize, int errorlevel){
ByteArrayOutputStream buffer = new ByteArrayOutputStream();
try{
buffer.write(setQRCodeSize(modulesize));
buffer.write(setQRCodeErrorLevel(errorlevel));
buffer.write(getQCodeBytes(code));
buffer.write(getBytesForPrintQRCode(true));
}catch(Exception e){
e.printStackTrace();
}
return buffer.toByteArray();
}
/**
* 横向两个二维码 sunmi自定义指令
* @param code1: 二维码数据
* @param code2: 二维码数据
* @param modulesize: 二维码块大小(单位:点, 取值 1 至 16 )
* @param errorlevel: 二维码纠错等级(0 至 3)
* 0 -- 纠错级别L ( 7%)
* 1 -- 纠错级别M (15%)
* 2 -- 纠错级别Q (25%)
* 3 -- 纠错级别H (30%)
*/
public static byte[] getPrintDoubleQRCode(String code1, String code2, int modulesize, int errorlevel){
ByteArrayOutputStream buffer = new ByteArrayOutputStream();
try{
buffer.write(setQRCodeSize(modulesize));
buffer.write(setQRCodeErrorLevel(errorlevel));
buffer.write(getQCodeBytes(code1));
buffer.write(getBytesForPrintQRCode(false));
buffer.write(getQCodeBytes(code2));
//加入横向间隔
buffer.write(new byte[]{0x1B, 0x5C, 0x18, 0x00});
buffer.write(getBytesForPrintQRCode(true));
}catch(Exception e){
e.printStackTrace();
}
return buffer.toByteArray();
}
/**
* 光栅打印二维码
*/
public static byte[] getPrintQRCode2(String data, int size){
byte[] bytes1 = new byte[4];
bytes1[0] = GS;
bytes1[1] = 0x76;
bytes1[2] = 0x30;
bytes1[3] = 0x00;
byte[] bytes2 = BytesUtil.getZXingQRCode(data, size);
return BytesUtil.byteMerger(bytes1, bytes2);
}
/**
* 打印一维条形码
*/
public static byte[] getPrintBarCode(String data, int symbology, int height, int width, int textposition){
if(symbology < 0 || symbology > 10){
return new byte[]{LF};
}
if(width < 2 || width > 6){
width = 2;
}
if(textposition <0 || textposition > 3){
textposition = 0;
}
if(height < 1 || height>255){
height = 162;
}
ByteArrayOutputStream buffer = new ByteArrayOutputStream();
try{
buffer.write(new byte[]{0x1D,0x66,0x01,0x1D,0x48,(byte)textposition,
0x1D,0x77,(byte)width,0x1D,0x68,(byte)height,0x0A});
byte[] barcode;
if(symbology == 10){
barcode = BytesUtil.getBytesFromDecString(data);
}else{
barcode = data.getBytes("GB18030");
}
if(symbology > 7){
buffer.write(new byte[]{0x1D,0x6B,0x49,(byte)(barcode.length+2),0x7B, (byte) (0x41+symbology-8)});
}else{
buffer.write(new byte[]{0x1D,0x6B,(byte)(symbology + 0x41),(byte)barcode.length});
}
buffer.write(barcode);
}catch(Exception e){
e.printStackTrace();
}
return buffer.toByteArray();
}
//光栅位图打印
public static byte[] printBitmap(Bitmap bitmap){
byte[] bytes1 = new byte[4];
bytes1[0] = GS;
bytes1[1] = 0x76;
bytes1[2] = 0x30;
bytes1[3] = 0x00;
byte[] bytes2 = BytesUtil.getBytesFromBitMap(bitmap);
return BytesUtil.byteMerger(bytes1, bytes2);
}
//光栅位图打印 设置mode
public static byte[] printBitmap(Bitmap bitmap, int mode){
byte[] bytes1 = new byte[4];
bytes1[0] = GS;
bytes1[1] = 0x76;
bytes1[2] = 0x30;
bytes1[3] = (byte) mode;
byte[] bytes2 = BytesUtil.getBytesFromBitMap(bitmap);
return BytesUtil.byteMerger(bytes1, bytes2);
}
//光栅位图打印
public static byte[] printBitmap(byte[] bytes){
byte[] bytes1 = new byte[4];
bytes1[0] = GS;
bytes1[1] = 0x76;
bytes1[2] = 0x30;
bytes1[3] = 0x00;
return BytesUtil.byteMerger(bytes1, bytes);
}
/*
* 选择位图指令 设置mode
* 需要设置1B 33 00将行间距设为0
*/
public static byte[] selectBitmap(Bitmap bitmap, int mode){
return BytesUtil.byteMerger(BytesUtil.byteMerger(new byte[]{0x1B, 0x33, 0x00}, BytesUtil.getBytesFromBitMap(bitmap, mode)), new byte[]{0x0A, 0x1B, 0x32});
}
/**
* 跳指定行数
*/
public static byte[] nextLine(int lineNum) {
byte[] result = new byte[lineNum];
for (int i = 0; i < lineNum; i++) {
result[i] = LF;
}
return result;
}
// ------------------------underline-----------------------------
//设置下划线1点
public static byte[] underlineWithOneDotWidthOn() {
byte[] result = new byte[3];
result[0] = ESC;
result[1] = 45;
result[2] = 1;
return result;
}
//设置下划线2点
public static byte[] underlineWithTwoDotWidthOn() {
byte[] result = new byte[3];
result[0] = ESC;
result[1] = 45;
result[2] = 2;
return result;
}
//取消下划线
public static byte[] underlineOff() {
byte[] result = new byte[3];
result[0] = ESC;
result[1] = 45;
result[2] = 0;
return result;
}
// ------------------------bold-----------------------------
/**
* 字体加粗
*/
public static byte[] boldOn() {
byte[] result = new byte[3];
result[0] = ESC;
result[1] = 69;
result[2] = 0xF;
return result;
}
/**
* 取消字体加粗
*/
public static byte[] boldOff() {
byte[] result = new byte[3];
result[0] = ESC;
result[1] = 69;
result[2] = 0;
return result;
}
// ------------------------character-----------------------------
/*
*单字节模式开启
*/
public static byte[] singleByte(){
byte[] result = new byte[2];
result[0] = FS;
result[1] = 0x2E;
return result;
}
/*
*单字节模式关闭
*/
public static byte[] singleByteOff(){
byte[] result = new byte[2];
result[0] = FS;
result[1] = 0x26;
return result;
}
/**
* 设置单字节字符集
*/
public static byte[] setCodeSystemSingle(byte charset){
byte[] result = new byte[3];
result[0] = ESC;
result[1] = 0x74;
result[2] = charset;
return result;
}
/**
* 设置多字节字符集
*/
public static byte[] setCodeSystem(byte charset){
byte[] result = new byte[3];
result[0] = FS;
result[1] = 0x43;
result[2] = charset;
return result;
}
// ------------------------Align-----------------------------
/**
* 居左
*/
public static byte[] alignLeft() {
byte[] result = new byte[3];
result[0] = ESC;
result[1] = 97;
result[2] = 0;
return result;
}
/**
* 居中对齐
*/
public static byte[] alignCenter() {
byte[] result = new byte[3];
result[0] = ESC;
result[1] = 97;
result[2] = 1;
return result;
}
/**
* 居右
*/
public static byte[] alignRight() {
byte[] result = new byte[3];
result[0] = ESC;
result[1] = 97;
result[2] = 2;
return result;
}
//切刀
public static byte[] cutter() {
byte[] data = new byte[]{0x1d, 0x56, 0x01};
return data;
}
//走纸到黑标
public static byte[] gogogo(){
byte[] data = new byte[]{0x1C, 0x28, 0x4C, 0x02, 0x00, 0x42, 0x31};
return data;
}
////////////////////////////////////////////////////////////////////////////////////
////////////////////////// private /////////////////////////
////////////////////////////////////////////////////////////////////////////////////
private static byte[] setQRCodeSize(int modulesize){
//二维码块大小设置指令
byte[] dtmp = new byte[8];
dtmp[0] = GS;
dtmp[1] = 0x28;
dtmp[2] = 0x6B;
dtmp[3] = 0x03;
dtmp[4] = 0x00;
dtmp[5] = 0x31;
dtmp[6] = 0x43;
dtmp[7] = (byte)modulesize;
return dtmp;
}
private static byte[] setQRCodeErrorLevel(int errorlevel){
//二维码纠错等级设置指令
byte[] dtmp = new byte[8];
dtmp[0] = GS;
dtmp[1] = 0x28;
dtmp[2] = 0x6B;
dtmp[3] = 0x03;
dtmp[4] = 0x00;
dtmp[5] = 0x31;
dtmp[6] = 0x45;
dtmp[7] = (byte)(48+errorlevel);
return dtmp;
}
private static byte[] getBytesForPrintQRCode(boolean single){
//打印已存入数据的二维码
byte[] dtmp;
if(single){ //同一行只打印一个QRCode， 后面加换行
dtmp = new byte[9];
dtmp[8] = 0x0A;
}else{
dtmp = new byte[8];
}
dtmp[0] = 0x1D;
dtmp[1] = 0x28;
dtmp[2] = 0x6B;
dtmp[3] = 0x03;
dtmp[4] = 0x00;
dtmp[5] = 0x31;
dtmp[6] = 0x51;
dtmp[7] = 0x30;
return dtmp;
}
private static byte[] getQCodeBytes(String code) {
//二维码存入指令
ByteArrayOutputStream buffer = new ByteArrayOutputStream();
try {
byte[] d = code.getBytes("GB18030");
int len = d.length + 3;
if (len > 7092) len = 7092;
buffer.write((byte) 0x1D);
buffer.write((byte) 0x28);
buffer.write((byte) 0x6B);
buffer.write((byte) len);
buffer.write((byte) (len >> 8));
buffer.write((byte) 0x31);
buffer.write((byte) 0x50);
buffer.write((byte) 0x30);
for (int i = 0; i < d.length && i < len; i++) {
buffer.write(d[i]);
}
} catch (Exception e) {
e.printStackTrace();
}
return buffer.toByteArray();
}
/**
* 设置字体大小
*/
public static byte[] setTextSize(int size) {
byte[] bytes = CMD_FontSize(size).getBytes();
return bytes;
}
// 字体的大小
// 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
public static 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;
}
Log.d("textSize",_cmdstr);
return _cmdstr;
}
}
补一个BytesUtil工具类代码，
public class BytesUtil {
//字节流转16进制字符串
public static String getHexStringFromBytes(byte[] data) {
if (data == null || data.length <= 0) {
return null;
}
String hexString = "0123456789ABCDEF";
int size = data.length * 2;
StringBuilder sb = new StringBuilder(size);
for (int i = 0; i < data.length; i++) {
sb.append(hexString.charAt((data[i] & 0xF0) >> 4));
sb.append(hexString.charAt((data[i] & 0x0F) >> 0));
}
return sb.toString();
}
//单字符转字节
private static byte charToByte(char c) {
return (byte) "0123456789ABCDEF".indexOf(c);
}
//16进制字符串转字节数组
@SuppressLint("DefaultLocale")
public static byte[] getBytesFromHexString(String hexstring){
if(hexstring == null || hexstring.equals("")){
return null;
}
hexstring = hexstring.replace(" ", "");
hexstring = hexstring.toUpperCase();
int size = hexstring.length()/2;
char[] hexarray = hexstring.toCharArray();
byte[] rv = new byte[size];
for(int i=0; i> 8);//xH
data[2] = (byte)hh;
data[3] = (byte)(hh >> 8);
int k = 4;
int m = 31;
for(int i=0; i hints = new Hashtable();
hints.put(EncodeHintType.CHARACTER_SET, "utf-8");
//图像数据转换，使用了矩阵转换
BitMatrix bitMatrix = new QRCodeWriter().encode(data, BarcodeFormat.QR_CODE, size, size, hints);
//System.out.println("bitmatrix height:" + bitMatrix.getHeight() + " width:" + bitMatrix.getWidth());
return getBytesFromBitMatrix(bitMatrix);
} catch (WriterException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return null;
}
public static byte[] getBytesFromBitMatrix(BitMatrix bits) {
if (bits == null) return null;
int h = bits.getHeight();
int w = (bits.getWidth() + 7) / 8;
byte[] rv = new byte[h * w + 4];
rv[0] = (byte) w;//xL
rv[1] = (byte) (w >> 8);//xH
rv[2] = (byte) h;
rv[3] = (byte) (h >> 8);
int k = 4;
for (int i = 0; i < h; i++) {
for (int j = 0; j < w; j++) {
for (int n = 0; n < 8; n++) {
byte b = getBitMatrixColor(bits, j * 8 + n, i);
rv[k] += rv[k] + b;
}
k++;
}
}
return rv;
}
private static byte getBitMatrixColor(BitMatrix bits, int x, int y) {
int width = bits.getWidth();
int height = bits.getHeight();
if (x >= width || y >= height || x < 0 || y < 0) return 0;
if (bits.get(x, y)) {
return 1;
} else {
return 0;
}
}
/**
* 将bitmap图转换为头四位有宽高的光栅位图
*/
public static byte[] getBytesFromBitMap(Bitmap bitmap) {
int width = bitmap.getWidth();
int height = bitmap.getHeight();
int bw = (width - 1) / 8 + 1;
byte[] rv = new byte[height * bw + 4];
rv[0] = (byte) bw;//xL
rv[1] = (byte) (bw >> 8);//xH
rv[2] = (byte) height;
rv[3] = (byte) (height >> 8);
int[] pixels = new int[width * height];
bitmap.getPixels(pixels, 0, width, 0, 0, width, height);
for (int i = 0; i < height; i++) {
for (int j = 0; j < width; j++) {
int clr = pixels[width * i + j];
int red = (clr & 0x00ff0000) >> 16;
int green = (clr & 0x0000ff00) >> 8;
int blue = clr & 0x000000ff;
byte gray = (RGB2Gray(red, green, blue));
rv[(width * i + j) / 8 + 4] = (byte) (rv[(width * i + j) / 8 + 4] | (gray << (7 - ((width * i + j) % 8))));
}
}
return rv;
}
/**
* 将bitmap转成按mode指定的N点行数据
*/
public static byte[] getBytesFromBitMap(Bitmap bitmap, int mode) {
int width = bitmap.getWidth();
int height = bitmap.getHeight();
int[] pixels = new int[width*height];
if(mode == 0 || mode == 1){
byte[] res = new byte[width*height/8 + 5*height/8];
bitmap.getPixels(pixels, 0, width, 0, 0, width, height);
for(int i = 0; i < height/8; i++){
res[0 + i*(width+5)] = 0x1b;
res[1 + i*(width+5)] = 0x2a;
res[2 + i*(width+5)] = (byte) mode;
res[3 + i*(width+5)] = (byte) (width%256);
res[4 + i*(width+5)] = (byte) (width/256);
for(int j = 0; j < width; j++){
byte gray = 0;
for(int m = 0; m < 8; m++){
int clr = pixels[j + width*(i*8+m)];
int red = (clr & 0x00ff0000) >> 16;
int green = (clr & 0x0000ff00) >> 8;
int blue = clr & 0x000000ff;
gray = (byte) ((RGB2Gray(red, green, blue)<<(7-m))|gray);
}
res[5 + j + i*(width+5)] = gray;
}
}
return res;
}else if(mode == 32 || mode == 33){
byte[] res = new byte[width*height/8 + 5*height/24];
bitmap.getPixels(pixels, 0, width, 0, 0, width, height);
for(int i = 0; i < height/24; i++){
res[0 + i*(width*3+5)] = 0x1b;
res[1 + i*(width*3+5)] = 0x2a;
res[2 + i*(width*3+5)] = (byte) mode;
res[3 + i*(width*3+5)] = (byte) (width%256);
res[4 + i*(width*3+5)] = (byte) (width/256);
for(int j = 0; j < width; j++){
for(int n = 0; n < 3; n++){
byte gray = 0;
for(int m = 0; m < 8; m++){
int clr = pixels[j + width*(i*24 + m + n*8)];
int red = (clr & 0x00ff0000) >> 16;
int green = (clr & 0x0000ff00) >> 8;
int blue = clr & 0x000000ff;
gray = (byte) ((RGB2Gray(red, green, blue)<<(7-m))|gray);
}
res[5 + j*3 + i*(width*3+5) + n] = gray;
}
}
}
return res;
}else{
return new byte[]{0x0A};
}
}
private static byte RGB2Gray(int r, int g, int b) {
return (false ? ((int) (0.29900 * r + 0.58700 * g + 0.11400 * b) > 200)
: ((int) (0.29900 * r + 0.58700 * g + 0.11400 * b) < 200)) ? (byte) 1 : (byte) 0;
}
/**
* 生成间断性黑块数据
* @param w : 打印纸宽度, 单位点
* @return
*/
public static byte[] initBlackBlock(int w){
int ww = (w + 7)/8 ;
int n = (ww + 11)/12;
int hh = n * 24;
byte[] data = new byte[ hh * ww + 5];
data[0] = (byte)ww;//xL
data[1] = (byte)(ww >> 8);//xH
data[2] = (byte)hh;
data[3] = (byte)(hh >> 8);
int k = 4;
for(int i=0; i < n; i++){
for(int j=0; j<24; j++){
for(int m =0; m> 8);//xH
data[2] = (byte)hh;
data[3] = (byte)(hh >> 8);
int k = 4;
for(int i=0; i 使用方法示例：
USBPrinter usbPrinter = USBPrinter.getInstance();
usbPrinter.initPrinter(this);
usbPrinter.bold(true);
usbPrinter.setTextSize(3);
usbPrinter.setAlign(1);
usbPrinter.printTextNewLine(tableName);
usbPrinter.printLine(1);
usbPrinter.bold(false);
usbPrinter.printTextNewLine("出品单号："+bean.getKitExpNumber());
usbPrinter.printTextNewLine("出品员："+bean.getChefName());
usbPrinter.printBarCode("6936983800013");
usbPrinter.printLine(5);
usbPrinter.cutPager();
记得在Actvity的onDestroy生命周期里调用USBPrinter.getInstance().close()方法