更新时间:2023-01-01 15:55:33
最后,我自己解决了这个问题,问题是我发送给打印机的标头字节才是真正的罪魁祸首.实际上,我正在发送170,1(其中170是打印机必须接收的第一个字节,第二个字节是打印机ID,我的意思是一些打印机端口,这两个值由打印机控制卡设计人员提供).实际上,我必须发送170,2,其中2是打印机ID,这样它才能给出正确的打印,并且对于每台打印机,通常都基于其控制卡发送数据.
Finally I solved this problem by my self and the problem is that the header byte which I am sending to the printer is the real culprit. Actually I am sending 170,1 (where 170 is the first byte that the printer must receive and the second byte is the printer id I mean some com port which these two values are given by Printer control card designer). Actual I have to send 170,2 where 2 is the Printer Id so that it gives the correct print and for every printer it is common of sending the data based on their control card's.
感谢很多朋友,这是我的代码,您可以将这些代码用于所有类型的打印机(用于POS热敏打印机)
Thanks a lot friends and here is my code that u can use these code for all types of printers(for POS-Thermal Printers)
public void IntentPrint(String txtvalue)
{
byte[] buffer = txtvalue.getBytes();
byte[] PrintHeader = { (byte) 0xAA, 0x55,2,0 };
PrintHeader[3]=(byte) buffer.length;
InitPrinter();
if(PrintHeader.length>128)
{
value+="\nValue is more than 128 size\n";
txtLogin.setText(value);
}
else
{
try
{
for(int i=0;i<=PrintHeader.length-1;i++)
{
mmOutputStream.write(PrintHeader[i]);
}
for(int i=0;i<=buffer.length-1;i++)
{
mmOutputStream.write(buffer[i]);
}
mmOutputStream.close();
mmSocket.close();
}
catch(Exception ex)
{
value+=ex.toString()+ "\n" +"Excep IntentPrint \n";
txtLogin.setText(value);
}
}
}
剩下的代码:
public void InitPrinter()
{
try
{
if(!bluetoothAdapter.isEnabled())
{
Intent enableBluetooth = new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE);
startActivityForResult(enableBluetooth, 0);
}
Set<BluetoothDevice> pairedDevices = bluetoothAdapter.getBondedDevices();
if(pairedDevices.size() > 0)
{
for(BluetoothDevice device : pairedDevices)
{
if(device.getName().equals("Your Device Name")) //Note, you will need to change this to match the name of your device
{
mmDevice = device;
break;
}
}
UUID uuid = UUID.fromString("00001101-0000-1000-8000-00805F9B34FB"); //Standard SerialPortService ID
//Method m = mmDevice.getClass().getMethod("createRfcommSocket", new Class[] { int.class });
//mmSocket = (BluetoothSocket) m.invoke(mmDevice, uuid);
mmSocket = mmDevice.createRfcommSocketToServiceRecord(uuid);
bluetoothAdapter.cancelDiscovery();
if(mmDevice.getBondState()==2)
{
mmSocket.connect();
mmOutputStream = mmSocket.getOutputStream();
}
else
{
value+="Device not connected";
txtLogin.setText(value);
}
}
else
{
value+="No Devices found";
txtLogin.setText(value);
return;
}
}
catch(Exception ex)
{
value+=ex.toString()+ "\n" +" InitPrinter \n";
txtLogin.setText(value);
}
}