在Android中使用爱普生蓝牙打印机打印粗体字母

// 获取蓝牙适配器
BluetoothAdapter bluetoothAdapter = BluetoothAdapter.getDefaultAdapter();

// 获取已配对设备列表
Set<BluetoothDevice> pairedDevices = bluetoothAdapter.getBondedDevices();

// 遍历设备列表，找到爱普生蓝牙打印机
BluetoothDevice epsonPrinter = null;
for (BluetoothDevice device : pairedDevices) {
    if (device.getName().equals("Epson Printer")) {
        epsonPrinter = device;
        break;
    }
}

// 建立蓝牙连接
BluetoothSocket socket = null;
try {
    socket = epsonPrinter.createRfcommSocketToServiceRecord(UUID.fromString("00001101-0000-1000-8000-00805F9B34FB"));
    socket.connect();
} catch (IOException e) {
    e.printStackTrace();
}

// 发送打印指令
OutputStream outputStream = null;
try {
    outputStream = socket.getOutputStream();

    // 设置字体样式为粗体
    byte[] boldCommand = new byte[]{0x1B, 0x45, 0x01};
    outputStream.write(boldCommand);

    // 发送要打印的文本
    String text = "Hello, World!";
    outputStream.write(text.getBytes());
} catch (IOException e) {
    e.printStackTrace();
}

// 关闭连接
try {
    outputStream.close();
    socket.close();
} catch (IOException e) {
    e.printStackTrace();
}