Я пытался получить изображение, но пока не добился успеха.



Принтер местного производства 2 " термопринтер с разрешением печати 8 точек / мм, 384 точек / линия, 203 точек на дюйм.

Принтер основан на плате, имеющейNXP 2388 ARM v7 Microproc. " с размером флэш-памяти 512 КБ, ОЗУ 128 КБ и Размер буфера приема 16 КБ.



Я последовал заэтот вопрос до сих пор.

Проблема: Изображение, которое я пробовал напечатать, имеет разрешение 576x95.

Изображение было напечатано (с некоторой ошибкой загорелся светодиод и отладка шума зуммера: D), но ориентация изображения была вертикальной, а не горизонтальной печати; это тоже в самой левой части страницы и верхняя часть изображения была обрезана

Предполагая, что я здесьЯ прошел некоторые флаги (покапакет") совместим с принтером, который у меня есть.

Я не работал над печатью Bluetooth раньше, поэтому любая помощь заметна :)

Моя существующая основная деятельность:

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  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();
        }
    }

}