I develop a mobile point of sale with flutter, but I don't know how to print the receipt on a Bluetooth thermal printer
I currently develop a plugin for it but it doesn't work yet
protected void printBill() {
if(btsocket == null){
btsocket = DeviceList.getSocket();
Intent BTIntent = new Intent(getApplicationContext(), DeviceList.class);
this.startActivityForResult(BTIntent, DeviceList.REQUEST_CONNECT_BT);
Toast.makeText(activity,"tes",Toast.LENGTH_LONG).show();
}
else{
OutputStream opstream = null;
try {
opstream = btsocket.getOutputStream();
} catch (IOException e) {
e.printStackTrace();
}
outputStream = opstream;
//print command
try {
try {
Thread.sleep(1000);
} catch (InterruptedException e) {
e.printStackTrace();
}
outputStream = btsocket.getOutputStream();
byte[] printformat = new byte[]{0x1B,0x21,0x03};
outputStream.write(printformat);
printCustom("Fair Group BD",2,1);
printCustom("Pepperoni Foods Ltd.",0,1);
printCustom("H-123, R-123, Dhanmondi, Dhaka-1212",0,1);
printCustom("Hot Line: +88000 000000",0,1);
printCustom("Vat Reg : 0000000000,Mushak : 11",0,1);
String dateTime[] = getDateTime();
printText(leftRightAlign(dateTime[0], dateTime[1]));
printText(leftRightAlign("Qty: Name" , "Price "));
printCustom(new String(new char[32]).replace("\0", "."),0,1);
printText(leftRightAlign("Total" , "2,0000/="));
printNewLine();
printCustom("Thank you for coming & we look",0,1);
printCustom("forward to serve you again",0,1);
printNewLine();
printNewLine();
outputStream.flush();
} catch (IOException e) {
e.printStackTrace();
}
}
}
The source code can be found here
Please help me develop this plugin, at least it can print text
I finally created my own plugin
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