Stampa di un'immagine utilizzando una stampante termica Bluetooth Da un'app per Android?

Question

Ho cercato di ottenere una stampa di un'immagine ma finora non ho avuto successo.

La stampante è una stampante termica da 2 "prodotta localmente con una risoluzione di stampa di 8 punti/mm, 384 dpi/linea, 203 dpi.
La stampante è basata su una scheda con" NXP 2388 ARM v7 Microproc ". dimensioni di 512 KB, RAM: 128 KB & un buffer di ricezione dimensioni 16KB

ho seguito this question fino ad ora

Problema:... L'immagine che ho provato la stampa è di 576x95 res

L'immagine è stata stampata (con qualche errore di illuminazione LED u p e debug rumore del buzzer: D) ma l'orientamento dell'immagine era verticale invece di essere stampato orizzontalmente; anche quello nella parte sinistra della pagina e la parte superiore dell'immagine era interrotta

Supponendo qui che non ho passato alcune delle bandiere (mentre rendevo il "pacchetto") compatibile con la stampante che Io ho.

Non ho lavorato sulla stampa Bluetooth Prima di modo che qualsiasi aiuto è apprezzabile :)

mio esistente attività principale:

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<BluetoothDevice> 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(); 
     } 
    } 

} 

La classe PrinterCommands:

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}; 
} 

Come menzionato nel manuale dev della stampante (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. 

La struttura del pacchetto richiesto:

Il pacchetto campi tabella:

tabella Orientamento & altre informazioni:

Answer 1

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 a Buffer metodo -

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; 
} 

Answer 2

ho una stampante termica con Bluetooth e connessione USB, se il vostro sostegno della stampante di ricerca dei comandi ESC/POS per i suoi comandi su internet, immagine di stampa raster è necessario inviare questo per:

[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) 

Seguire le linee guida della stampante, potrebbe essere diverso dagli altri.