在Android中通过蓝牙打印图像和文本

Question

我在同时打印账单的图像（可绘制）和文本（23行）时遇到问题。如果我省略图像部分，则所有文本都可以正常打印，但是如果我将打印图像放在文本之前（作为标题的徽标），则仅打印4行，然后停止打印。

                    OutputStream outputStream = mBluetoothSocket
                        .getOutputStream();

                os = outputStream;

                String separador = "--------------------------------";

                byte[] onlybold = new byte[]{0x1B, 0x21, 0x08}; // 1- only bold text
                byte[] normaltext = new byte[]{0x1B, 0x21, 0x00};  // 0- normal size text
                byte[] boldmedium = new byte[]{0x1B, 0x21, 0x20}; // 2- bold with medium text

                printPhoto(R.drawable.logogray); // if i omit this line the flow of the printing code reaches the end

                String preInstitucion = institucion.trim();

                String strInstitucion = "";

                if (preInstitucion.length() > 32) {
                    String oneInstitucion = preInstitucion.substring(0, 31);
                    int lastSpace = oneInstitucion.lastIndexOf(" ");
                    strInstitucion = oneInstitucion.substring(0, lastSpace - 1) + "\n" + preInstitucion.substring(lastSpace + 1, lastSpace + 30);
                } else {
                    strInstitucion = preInstitucion;
                }

                String HEADER = "";

                os.write(onlybold);

                HEADER = "\n\n" + strInstitucion.trim() + "\n" +
                        direccion1.trim() + "\n" +
                        direccion2.trim() + "\n" +
                        telefono.trim() + "\n";

                os.write(HEADER.getBytes()); // << otherwise, when I am sending the image to print, this is the last line that is executed and omits everything else RELATED TO PRINTING

                os.write(normaltext);

                String BILL = separador + "\n" ;
                BILL = BILL + String.format("%1$10s %2$13s", "Codigo", contrib.getString(0).trim());
                BILL = BILL + "\n";
                BILL = BILL + String.format("%1$10s %2$13s", "Medidor", medidor.getString(0).trim());
                BILL = BILL + "\n";
                BILL = BILL + separador;

                BILL = BILL + "\n";
                BILL = BILL + "Nombre del Contribuyente:";
                os.write(BILL.getBytes());

                os.write(onlybold);

                BILL = "";
                BILL = BILL + "\n" + contrib.getString(1).toUpperCase().trim();

                os.write(BILL.getBytes());
                os.write(normaltext);

                BILL = "";
                BILL = BILL + "\n" + "Direccion del servicio:";

                os.write(BILL.getBytes());

                os.write(onlybold);

                BILL = "";
                BILL = BILL + "\n" + contrib.getString(2).trim();

                os.write(BILL.getBytes());

                os.write(normaltext);

                BILL = "";
                BILL = BILL
                        + "\n" + separador;

                BILL = BILL + "\n" + String.format("%1$-14s %2$14s", "Lect. Anterior", String.valueOf(ultimalectura));
                BILL = BILL + "\n" + String.format("%1$-14s %2$14s", "Lect. Actual", String.valueOf(inputlectura));
                BILL = BILL + "\n" + String.format("%1$-14s %2$14s", "Consumo metros", String.valueOf(metros));
                BILL = BILL + "\n" + String.format("%1$-14s %2$14s", "Mes de Lectura", cmonth.trim() + "/" + String.valueOf(year).substring(2));

这是我第一次使用打印功能进行开发。 希望您能帮助我，我真的很困惑！