使用蓝牙热敏打印机从Android应用程序打印图像?

我一直试图获得一张图片的印刷品,但到目前为止我还没有成功。

该打印机是本地制造的2英寸热敏打印机,打印分辨率为8点/ mm,384点/线,203 dpi。
该打印机基于具有“NXP 2388 ARM v7 Microproc”的电路板。 内存FLASH大小为512 KB,RAM:128 KB,接收缓冲区大小为16KB。

我一直跟着这个问题 。

问题:我尝试打印的图像是576×95 res。 在此处输入图像描述

打印图像(有一些错误LED点亮并调试蜂鸣器噪音:D)但图像的方向是垂直的而不是水平打印; 也是在页面的最左侧,图像的顶部也被切断了

假设我没有通过一些标志(同时使“数据包”)与我拥有的打印机兼容。

我之前没有从事蓝牙打印,所以任何帮助都很明显:)

我现有的主要活动:

public class MainActivity extends Activity { // will show the statuses TextView myLabel; // will enable user to enter any text to be printed EditText myTextbox; EditText devName; public TableLayout tl2; String devid; String[] pName; String[] LODQTY; String[] rte; String[] stk; String[] oQty; String[] oVal; String[] fQty; BitSet dots; int mWidth; int mHeight; String mStatus; String TAG = "TAG"; public String msg; // android built in classes for bluetooth operations BluetoothAdapter mBluetoothAdapter; BluetoothSocket mmSocket; BluetoothDevice mmDevice; OutputStream mmOutputStream; InputStream mmInputStream; Thread workerThread; byte[] readBuffer; int readBufferPosition; int counter; volatile boolean stopWorker; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); devName = (EditText) findViewById(R.id.etdevice); devName.setText("BTprinter0377"); String[] product_info = new String[6]; product_info[0] = "CPL400^10^1^0^4^0.4^0"; product_info[1] = "CPL400^10^1^0^4^0.4^0"; product_info[2] = "CPL400^10^1^0^4^0.4^0"; product_info[3] = "CPL400^10^1^0^4^0.4^0"; product_info[4] = "CPL400^10^1^0^4^0.4^0"; product_info[5] = "CPL400^10^1^0^4^0.4^0"; tl2 = (TableLayout) findViewById(R.id.dynSummary); LayoutInflater inflater = getLayoutInflater(); for (int current = 0; current <= (product_info.length - 1); current++) { final TableRow row = (TableRow)inflater.inflate(R.layout.table_summary_row, tl2 , false); TextView tv1 = (TextView)row.findViewById(R.id.tvSkuName); TextView tv2 = (TextView)row.findViewById(R.id.tvOrderQty); TextView tv3 = (TextView)row.findViewById(R.id.tvFreeQty); TextView tv4 = (TextView)row.findViewById(R.id.tvSampleQty); TextView tv5 = (TextView)row.findViewById(R.id.tvTotalOrderKg); TextView tv6 = (TextView)row.findViewById(R.id.tvTotalFreeKg); TextView tv7 = (TextView)row.findViewById(R.id.tvTotalSampleKg); StringTokenizer tokens = new StringTokenizer(String.valueOf(product_info[current]), "^"); //System.out.println("tokens.nextToken().trim()"+tokens.nextToken().trim()); tv1.setText(tokens.nextToken().trim()); tv2.setText(tokens.nextToken().trim()); tv3.setText(tokens.nextToken().trim()); tv4.setText(tokens.nextToken().trim()); tv5.setText(tokens.nextToken().trim()); tv6.setText(tokens.nextToken().trim()); tv7.setText(tokens.nextToken().trim()); tl2.addView(row); } try { // we have three buttons for specific functions Button openButton = (Button) findViewById(R.id.open); Button sendButton = (Button) findViewById(R.id.send); Button closeButton = (Button) findViewById(R.id.close); myLabel = (TextView) findViewById(R.id.label); // open bluetooth connection openButton.setOnClickListener(new View.OnClickListener() { public void onClick(View v) { devid = devName.getText().toString().trim(); try { findBT(); openBT(); } catch (IOException ex) { } } }); // send data typed by the user to be printed sendButton.setOnClickListener(new View.OnClickListener() { public void onClick(View v) { try { sendData(); } catch (IOException ex) { } } }); // close bluetooth connection closeButton.setOnClickListener(new View.OnClickListener() { public void onClick(View v) { try { closeBT(); } catch (IOException ex) { } } }); } catch (NullPointerException e) { e.printStackTrace(); } catch (Exception e) { e.printStackTrace(); } } /* * This will find a bluetooth printer device */ void findBT() { try { mBluetoothAdapter = BluetoothAdapter.getDefaultAdapter(); if (mBluetoothAdapter == null) { myLabel.setText("No bluetooth adapter available"); } if (!mBluetoothAdapter.isEnabled()) { Intent enableBluetooth = new Intent( BluetoothAdapter.ACTION_REQUEST_ENABLE); startActivityForResult(enableBluetooth, 0); } Set pairedDevices = mBluetoothAdapter .getBondedDevices(); if (pairedDevices.size() > 0) { for (BluetoothDevice device : pairedDevices) { System.out.println("device.getName(): "+device.getName().toString()); if (device.getName().equals("BTprinter0377")) { mmDevice = device; break; } } } myLabel.setText("Bluetooth Device Found"); } catch (NullPointerException e) { e.printStackTrace(); } catch (Exception e) { e.printStackTrace(); } } /* * Tries to open a connection to the bluetooth printer device */ void openBT() throws IOException { try { // Standard SerialPortService ID UUID uuid = UUID.fromString("00001101-0000-1000-8000-00805f9b34fb"); mmSocket = mmDevice.createRfcommSocketToServiceRecord(uuid); mmSocket.connect(); mmOutputStream = mmSocket.getOutputStream(); mmInputStream = mmSocket.getInputStream(); beginListenForData(); myLabel.setText("Bluetooth Opened"); } catch (NullPointerException e) { e.printStackTrace(); } catch (Exception e) { e.printStackTrace(); } } /* * 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 character final 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 be printed by the bluetooth printer */ void sendData() throws IOException { System.out.println("tl2.getChildCount(): "+tl2.getChildCount()); try { print_image("/sdcard/tryimg.png"); String msg22; msg22 = "\n"; msg22 += "PN Or Fr Sa TOKg TFKg TSKg"; msg22 += "\n"; //mmOutputStream.write(msg22.getBytes()); // tell the user data were sent myLabel.setText("Data Sent"); } catch (NullPointerException e) { e.printStackTrace(); } catch (Exception e) { e.printStackTrace(); } } /* * Close the connection to bluetooth printer. */ void closeBT() throws IOException { try { stopWorker = true; mmOutputStream.close(); mmInputStream.close(); mmSocket.close(); myLabel.setText("Bluetooth Closed"); } catch (NullPointerException e) { e.printStackTrace(); } catch (Exception e) { e.printStackTrace(); } } public String convertBitmap(Bitmap inputBitmap) { mWidth = inputBitmap.getWidth(); mHeight = inputBitmap.getHeight(); convertArgbToGrayscale(inputBitmap, mWidth, mHeight); mStatus = "ok"; return mStatus; } private void convertArgbToGrayscale(Bitmap bmpOriginal, int width, int height) { int pixel; int k = 0; int B = 0, G = 0, R = 0; dots = new BitSet(); try { for (int x = 0; x < height; x++) { for (int y = 0; y < width; y++) { // get one pixel color pixel = bmpOriginal.getPixel(y, x); // retrieve color of all channels R = Color.red(pixel); G = Color.green(pixel); B = Color.blue(pixel); // take conversion up to one single value by calculating // pixel intensity. R = G = B = (int) (0.299 * R + 0.587 * G + 0.114 * B); // set bit into bitset, by calculating the pixel's luma if (R < 55) { dots.set(k);//this is the bitset that i'm printing } k++; } } } catch (Exception e) { // TODO: handle exception Log.e(TAG, e.toString()); } } private void print_image(String file) throws IOException { File fl = new File(file); if (fl.exists()) { Bitmap bmp = BitmapFactory.decodeFile(file); convertBitmap(bmp); mmOutputStream.write(PrinterCommands.SET_LINE_SPACING_24); int offset = 0; while (offset < bmp.getHeight()) { mmOutputStream.write(PrinterCommands.SELECT_BIT_IMAGE_MODE); for (int x = 0; x < bmp.getWidth(); ++x) { for (int k = 0; k < 3; ++k) { byte slice = 0; for (int b = 0; b < 8; ++b) { int y = (((offset / 8) + k) * 8) + b; int i = (y * bmp.getWidth()) + x; boolean v = false; if (i < dots.length()) { v = dots.get(i); } slice |= (byte) ((v ? 1 : 0) << (7 - b)); } mmOutputStream.write(slice); } } offset += 24; mmOutputStream.write(PrinterCommands.FEED_LINE); mmOutputStream.write(PrinterCommands.FEED_LINE); mmOutputStream.write(PrinterCommands.FEED_LINE); mmOutputStream.write(PrinterCommands.FEED_LINE); mmOutputStream.write(PrinterCommands.FEED_LINE); mmOutputStream.write(PrinterCommands.FEED_LINE); } mmOutputStream.write(PrinterCommands.SET_LINE_SPACING_30); } else { Toast.makeText(this, "file doesn't exists", Toast.LENGTH_SHORT).show(); } } } 

PrinterCommands类:

 public class PrinterCommands { public static final byte[] INIT = {27, 64}; public static byte[] FEED_LINE = {10}; public static byte[] SELECT_FONT_A = {27, 33, 0}; public static byte[] SET_BAR_CODE_HEIGHT = {29, 104, 100}; public static byte[] PRINT_BAR_CODE_1 = {29, 107, 2}; public static byte[] SEND_NULL_BYTE = {0x00}; public static byte[] SELECT_PRINT_SHEET = {0x1B, 0x63, 0x30, 0x02}; public static byte[] FEED_PAPER_AND_CUT = {0x1D, 0x56, 66, 0x00}; public static byte[] SELECT_CYRILLIC_CHARACTER_CODE_TABLE = {0x1B, 0x74, 0x11}; public static byte[] SELECT_BIT_IMAGE_MODE = {0x1B, 0x2A, 33, (byte) 255, 3}; //public static byte[] SELECT_BIT_IMAGE_MODE = {0x1B, 0x2A, 0x64, 0x63, 48, (byte) 255}; public static byte[] SET_LINE_SPACING_24 = {0x1B, 0x33, 24}; public static byte[] SET_LINE_SPACING_30 = {0x1B, 0x33, 30}; public static byte[] TRANSMIT_DLE_PRINTER_STATUS = {0x10, 0x04, 0x01}; public static byte[] TRANSMIT_DLE_OFFLINE_PRINTER_STATUS = {0x10, 0x04, 0x02}; public static byte[] TRANSMIT_DLE_ERROR_STATUS = {0x10, 0x04, 0x03}; public static byte[] TRANSMIT_DLE_ROLL_PAPER_SENSOR_STATUS = {0x10, 0x04, 0x04}; } 

如打印机的dev手册中所述(pdf):

 Bit Map Image Print 1. Select the image either from PC or from mobile's SD card. 2. Convert the image into monochrome bmp. 3. Resize the image to fit into the printer paper area if it is exceeding 4. Now read the processed image through fileinputstream and save it into byte array. 5. Make the packet of image and then send it to printer over outputstream. 

所需的数据包结构: 在此处输入图像描述

包字段图表: 在此处输入图像描述

对齐表和其他信息: 在此处输入图像描述

 private byte[] printbyte = {(byte)0x1B,(byte)0x2A,(byte)0x6F,(byte)0x63} File file = new File(Environment.getExternalStorageDirectory + File.seprator()+"file_name"); FileInputStream fin = new FileInputStream(file); byte imageContent[] = new byte[(int)file.length()]; fin.read(imageContent); byte [] width = hexToBuffer(Integer.toHexString(your_width)); byte [] height = hexToBuffer(Integer.toHexString(your_height)); byte[] imageToPrint = new byte[printbyte.lenght()+imageContent.lenght()+width.lenght()+height.lenght()]; System.arraycopy(imagetoprint,0,printbyte,0,printbyte.lenght()); System.arraycopy(imagetoprint,printbyte.lenght(),width ,0,width.lenght()); System.arraycopy(imagetoprint,width.lenght(),height,0,height.lenght()); System.arraycopy(imagetoprint,height.lenght(),imageContent,0,imageContent.lenght()); mmOutputStream.write(imagetoprint); 

Hex to Buffer方法 –

 public static byte[] hexToBuffer(String hexString) throws NumberFormatException { int length = hexString.length(); byte[] buffer = new byte[(length + 1) / 2]; boolean evenByte = true; byte nextByte = 0; int bufferOffset = 0; if ((length % 2) == 1) { evenByte = false; } for (int i = 0; i < length; i++) { char c = hexString.charAt(i); int nibble; // A "nibble" is 4 bits: a decimal 0..15 if ((c >= '0') && (c <= '9')) { nibble = c - '0'; } else if ((c >= 'A') && (c <= 'F')) { nibble = c - 'A' + 0x0A; } else if ((c >= 'a') && (c <= 'f')) { nibble = c - 'a' + 0x0A; } else { throw new NumberFormatException("Invalid hex digit '" + c + "'."); } if (evenByte) { nextByte = (byte) (nibble << 4); } else { nextByte += (byte) nibble; buffer[bufferOffset++] = nextByte; } evenByte = !evenByte; } return buffer; } 

我有一个带蓝牙和USB连接的热敏打印机,如果您的打印机支持ESC / POS命令在互联网上搜索其命令,对于打印光栅图像,您应该发送:

 [Name] Print raster bit image [Format] ASCII GS v 0 m xL xH yL yH d1...dk Hex 1D 76 30 m xL xH yL yH d1...dk Decimal 29 118 48 m xL xH yL yH d1...dk [Range] 0£ m£ 3, 48£ m £ 51 0£ xL£ 255 0£ xH£ 255 0£ yL£ 255 0£ d£ 255 k=(xL+ xH*256)*(yL+yH*256) 

请遵循您的打印机指南,它可能与其他人不同。