ekasetiawans / flutter_bluetooth_printer_plugin Goto Github PK

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20.0 2.0 35.0 2.72 MB

License: MIT License

Java 11.28% Ruby 2.93% Swift 20.73% Objective-C 0.54% Dart 63.67% Kotlin 0.85%

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flutter_bluetooth_printer_plugin's Issues

is there a way to increase the print size (printBytes())

Only prints once

After successfully printing a receipt once, subsequent attempts to print again are unsuccessful.

why not print complete? onProgress: (total, sent) ,the sent value is only 0 and total

the sent value is only 0 and total ,not has the other progress?
I/flutter ( 9951): sent = 0 ,total = 32277
I/flutter ( 9951): progress = 0.0 , sent = 0 ,total = 32277
I/flutter ( 9951): sent = 32277 ,total = 32277
I/flutter ( 9951): progress = 1.0 , sent = 32277 ,total = 32277
D/BluetoothSocket( 9951): close() this: android.bluetooth.BluetoothSocket@5fd79c3, channel: 1, mSocketIS: android.net.LocalSocketImpl$SocketInputStream@7d87240, mSocketOS: android.net.LocalSocketImpl$SocketOutputStream@7785579, mSocket: android.net.LocalSocket@cdd72be impl:android.net.LocalSocketImpl@33ef1f fd:java.io.FileDescriptor@9f2726c, mSocketState: CONNECTED
D/BluetoothSocket( 9951): close() this: android.bluetooth.BluetoothSocket@5fd79c3, channel: 1, mSocketIS: android.net.LocalSocketImpl$SocketInputStream@7d87240, mSocketOS: android.net.LocalSocketImpl$SocketOutputStream@7785579, mSocket: null, mSocketState: CLOSED
why not print complete?

Can't print in IOS 17 with XPrinter device via Bluetooth

Give me permission to create pull request, please.

I wanted to create pull request to add one more feature to this plugin, but I couldn't. Please give me permission to this account or this email [email protected]

selectDevice localization

FlutterBluetoothPrinter.selectDevice(context) is perfect to choose device, no need to rewrite it.

But is hard coded localized in English, and since it has only few texts in it i suggest to pass then m as optional parameters, i.e.:

FlutterBluetoothPrinter.selectDevice(
  context, 
  title='Choose a device',
  disabled='Bluetooth is disabled',
  permit='Bluetooth is not permitted',
  unknown='(unknown)',
);

P.S.: I really appreciate flutter_bluetooth_printer_plugin. I wrote a reporting system for ESC/POS and I use it to write to the printer. See https://github.com/claudiodriussi/dot_report

example app doesn't work

hi, i just clone an example app, it doesn't work. any idea ?

Flutter (Channel stable, 3.19.6, on macOS 14.0 23A344 darwin-arm64, locale en-KH)
    • Flutter version 3.19.6 on channel stable at /Users/kaiju/Development/flutter
    • Upstream repository https://github.com/flutter/flutter.git
    • Framework revision 54e66469a9 (3 weeks ago), 2024-04-17 13:08:03 -0700
    • Engine revision c4cd48e186
    • Dart version 3.3.4
    • DevTools version 2.31.1

Print delay too long

Thank you for the plugin it works perfectly well. I wonder if Can I reduce the delay speed on printing to faster?

Problems on the ios

First of all thank you very much for the package which is very good.
I'll explain how I'm using your plugin to print.
For greater customization I'm generating the HTML prints
and I'm converting them to image using this package https://pub.dev/packages/webcontent_converter but since it's not null-safety I forked it and I'm using it straight from my github
https://github.com/renanzdm/webcontent_convert_forked I intend to upload it if the author does not update it.

On android it works perfectly when sending the entire byte list, but on IOS there is a limitation that when the list is too much
great impression does not occur, the way I found it was to divide this list and send it in parts.

 final len = data.length;
 List<List<int>> chunks = [];
 for (var i = 0; i < len; i += 100) {
   var end = (i + 100 < len) ? i + 100 : len;
   chunks.add(data.sublist(i, end));
 }
 for (var i = 0; i < chunks.length; i++) {
 device.printBytes(bytes:Uint8List.fromList(chunks[i]));
 }

Doing this seems to work fine on ios, and on android you need to do a check to then send the list in its normal size
as I don't know the Objective-C language, it can't implement directly in native (which I think would be ideal)

On the native android I made some changes in terms of asking for location permission when scanning, and it worked well
I would like your opinion and if possible a response to these changes
Appreciate

Image Optimization

Your package has no problem. It works fine!

I generated receipts using widget but my printers (I tested on 2 diferent printers) took to much to print the image. They are using the same time to print a receipt against black receipt. When I printed a default text, it works fine.

My solution (I don't know how implement it):

Using img.Image object we can create boxes with content a remove blank spaces. The big problem, ECS Printers can't print using coordinates. For example, print image with start at Offset(5, 10).

Receipt

Screenrecorder-2021-11-05-17-12-19-904.0.mp4

Black receipt

Screenrecorder-2021-11-05-17-17-43-662.0.mp4

2.6.3 I cannot discovery bluethooth device in IOS. Please help

I updated version from 2.3.0 to 2.6.3 then I cannot discovery bluethooth device :(
In android, everything ok but IOS...And version 2.3.0 - android i print Receipt from widget Receipt it is fast and IOS is so slow :( Please help !!!!

iOS stuck on scanning device

Scanning device return null

iOS stuck on scanning device

I got a problem on :

iOS
iphone X
version 15.3.1

iso Bluetooth connection state is stuck on waiting.
so it keeps showing loading dialog.
it really slow

add line feed & disable scroll on receipt

hi, first of all i really like this package easy to use , i want to add line feed (space) when printer printed and is it possible or not if i want to disable scroll on receipt. thank in advance

can't cut paper

change the code to :
final additional = [
...generator.emptyLines(addFeeds),
...generator.text('.'),
];

final additional = [
  ...generator.emptyLines(addFeeds),
  ...generator.text('.'),
  ...generator.cut(),
];

maybe the print function could trans the custom additional bytes to blue tooth device?

How to print Image without using Receipt widget?

How to print Image without using Receipt widget?
How to use only FlutterBluetoothPrinter.printImage() ?

final byteData = capturedImage.buffer.asByteData();
    final List<int> bytes = byteData.buffer.asUint8List(byteData.offsetInBytes, byteData.lengthInBytes,);

    final buffer = await ui.ImmutableBuffer.fromUint8List(capturedImage);
    final image = await ui.ImageDescriptor.encoded(buffer);
    
    final imageWidth = image.width;
    final imageHeight = image.height;

    print("imageWidth: ${imageWidth}, imageHeight: ${imageHeight}");

    FlutterBluetoothPrinter.printImage(
        address: bluetoothDevice!.value.address,
        imageBytes: bytes,
        imageWidth: imageWidth,
        imageHeight: imageHeight,
        addFeeds: 1,
        keepConnected: true,
        useImageRaster: true,
        paperSize: PaperSize.mm58);
    }

this my code and this is error

E/flutter ( 4048): [ERROR:flutter/runtime/dart_vm_initializer.cc(41)] Unhandled Exception: RangeError (index): Index out of range: index should be less than 13186: 13186
E/flutter ( 4048): #0      Uint32List.[] (dart:typed_data-patch/typed_data_patch.dart:2560:7)
E/flutter ( 4048): #1      Image.getPixel (package:image/src/image.dart:422:37)
E/flutter ( 4048): #2      convolution (package:image/src/filter/convolution.dart:26:26)
E/flutter ( 4048): #3      smooth (package:image/src/filter/smooth.dart:10:10)
E/flutter ( 4048): #4      FlutterBluetoothPrinter._blackwhiteInternal (package:flutter_bluetooth_printer/src/flutter_bluetooth_printer_impl.dart:134:15)
E/flutter ( 4048): #5      _IsolateConfiguration.applyAndTime.<anonymous closure> (package:flutter/src/foundation/_isolates_io.dart:108:21)
E/flutter ( 4048): #6      Timeline.timeSync (dart:developer/timeline.dart:160:22)
E/flutter ( 4048): #7      _IsolateConfiguration.applyAndTime (package:flutter/src/foundation/_isolates_io.dart:106:21)
E/flutter ( 4048): #8      _spawn (package:flutter/src/foundation/_isolates_io.dart:127:67)
E/flutter ( 4048): #9      _delayEntrypointInvocation.<anonymous closure> (dart:isolate-patch/isolate_patch.dart:300:17)
E/flutter ( 4048): #10     _RawReceivePortImpl._handleMessage (dart:isolate-patch/isolate_patch.dart:192:12)

convert pdf to images

works fine on 2.3.0 ✔
after upgrade to flutter_bluetooth_printer: ^2.6.3
the api for FlutterBluetoothPrinter.printImage changed
no i have to pass a List<int> instead of image from package image

i tried to use image.getBytes()

the code i use to convert pdf to image

Future<Image> convertPdfUnit8ListToImage(
  Uint8List docBytes, [
  double? width,
]) async {
  final watch = Stopwatch()..start();
  final document = await x.PdfDocument.openData(docBytes);
  final page = await document.getPage(1);
  final image = await page.render(
    width: width ?? page.width * 3,
    height: page.height * 3,
    format: x.PdfPageImageFormat.png,
  );
  page.close();
  final img = decodeImage(image!.bytes.buffer.asUint8List());
  watch.stop();

  log('it took ${watch.elapsed.inSeconds} Seconds');
  if (img != null) return img;
  throw Exception('Could not decode image');
}

but the package print a dark image blow i will
before update :

after update and use bytes

FlutterBluetoothPrinterPlugin.java uses or overrides a deprecated API

Building my apk I got the warning: FlutterBluetoothPrinterPlugin.java uses or overrides a deprecated API.

I have to worry about it?

In my build.gradle file I changed only minSdkVersion form flutter.minSdkVersion to 18 as requested by flutter build apk

by the way, I really love flutter_bluetooth_printer.

Many thanks

Problems with Flutter 3.x

Does not work when used in newer version of Flutter. There are missing definitions like "PaperSize" Class.

How to change the paper size?

How can i change the paper size from mm58 to mm80 ?

flutter_bluetooth_printer_plugin custom language

I not able to found a method to use my personalized text for various component of this library, the language is english but if I need other language what is the way? thank you!

Mobile App shutting down after printing on iOS

Hello.

I've made a simple project based on example.

import 'package:flutter/material.dart';
import 'package:flutter/services.dart';
import 'package:flutter_bluetooth_printer/flutter_bluetooth_printer.dart';

void main() {
  runApp(const MyApp());
}

// class Ticket{
//   Future<List<int>> getSimpleTicket() async{
//
//       var profile = await CapabilityProfile.load();
//       var ticketGenerator = Generator(PaperSize.mm58, profile);
//       var ticket = <int>[];
//       ticket += ticketGenerator.feed(1);
//       return ticket;
//     }
// }

class MyApp extends StatefulWidget {
  const MyApp({Key? key}) : super(key: key);

  @override
  State<MyApp> createState() => _MyAppState();
}

class _MyAppState extends State<MyApp> {

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      theme: ThemeData(
        useMaterial3: true,
        colorSchemeSeed: Colors.blue,
        appBarTheme: const AppBarTheme(
          systemOverlayStyle: SystemUiOverlayStyle(
            statusBarColor: Colors.transparent,
          ),
        ),
      ),
      home: const ReceiptToPrint(),
    );
  }
}


class ReceiptToPrint extends StatefulWidget {
  const ReceiptToPrint({Key? key}) : super(key: key);

  @override
  State<ReceiptToPrint> createState() => _ReceiptToPrintState();
}

class _ReceiptToPrintState extends State<ReceiptToPrint> {
  ReceiptController? controller;
  String? address;

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      body: Column(
        crossAxisAlignment: CrossAxisAlignment.stretch,
        children: [
          Expanded(
            child: Receipt(
              builder: (context) {
                return Column(
                  mainAxisSize: MainAxisSize.min,
                  crossAxisAlignment: CrossAxisAlignment.stretch,
                  children: const [
                    FittedBox(
                      fit: BoxFit.cover,
                      child: Text(
                        'PURCHASE RECEIPT',
                        style: TextStyle(
                          fontWeight: FontWeight.bold,
                        ),
                      ),
                    )
                  ],
                );
              },
              onInitialized: (controller) {
                this.controller = controller;
              },
            ),
          ),
          ElevatedButton(
            onPressed: () async {
              final selectedAddress = address ??
                  (await FlutterBluetoothPrinter.selectDevice(context))
                      ?.address;

              if (selectedAddress != null) {
                controller?.print(address: selectedAddress);
              }
            },
            child: const Text('PRINT'),
          ),
        ],
      ),
    );
  }
}

After printing on paper application shutting down immediately with following exception:

Bluetooth power on
Rx:BEF8D6C9-9C21-4C9E-B632-BD58C1009F9F
Tx:BEF8D6C9-9C21-4C9E-B632-BD58C1009F9F
transparentDataReadChar -> (null)
Rx:49535343-8841-43F4-A8D4-ECBE34729BB3
Tx:49535343-1E4D-4BD9-BA61-23C647249616
Rx:49535343-8841-43F4-A8D4-ECBE34729BB3
Tx:49535343-1E4D-4BD9-BA61-23C647249616
*** Assertion failure in -[CBCentralManager cancelPeripheralConnection:options:], CBCentralManager.m:664
*** Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: 'Invalid parameter not satisfying: peripheral != nil'
*** First throw call stack:
(0x181ac90fc 0x19a319d64 0x18338539c 0x19fce30ec 0x19fce31a8 0x104a8711c 0x18173b670 0x18173eb44 0x181751c48 0x181749ac4 0x181a81d84 0x181a3bf5c 0x181a4f468 0x19d5f338c 0x1843f25d0 0x184170f74 0x104a86650 0x104bcdaa4)
libc++abi: terminating with uncaught exception of type NSException
* thread #1, queue = 'com.apple.main-thread', stop reason = signal SIGABRT
    frame #0: 0x00000001b9029964 libsystem_kernel.dylib`__pthread_kill + 8
libsystem_kernel.dylib`__pthread_kill:
->  0x1b9029964 <+8>:  b.lo   0x1b9029984               ; <+40>
    0x1b9029968 <+12>: pacibsp 
    0x1b902996c <+16>: stp    x29, x30, [sp, #-0x10]!
    0x1b9029970 <+20>: mov    x29, sp
Target 0: (Runner) stopped.
Lost connection to device.

Example project prints receipt without any problem.

Printer model: MPT-II

Updated:
If I make a break point on this line

and press resume on each hit, the exception isn't throwing. It seems that it's need to be added some delay or something.

Another Update:
Added 1 second delay before disconnecting printer. The problem is gone

[iOS] App always asks Bluetooth permission right on it start

It asks the user for Bluetooth Permissions on App launch, without making any reference to the package methods in the Apps' code
Expected: only ask for bluetooth permission if app call any method from the package.

Supported Printers

What are the supported printers?
Does it work withe the printers supported by package esc_pos_bluetooth?

Conflict dependency on image v 3.0.1

This plugin uses the esc_pos_utils_plus package, which depends on the image package of Dart in version 3. The current version of Dart is already using image v4, and this causes some conflicts with other updated packages.

Due to the fact that this esc_pos package has not been updated for some time, I found the flutter_esc_pos_utils_image_3 package, which could be used as a replacement. It uses a mirror of the image version 3, and the required changes would be minimal.
I am using Flutter version 3.7.0.
See: https://pub.dev/packages/flutter_esc_pos_utils_image_3

control the alignment of printed widget

This is my code :
Column(
mainAxisAlignment: MainAxisAlignment.center,
children: [
Expanded(
child: Receipt(
backgroundColor: AppColors.white,
onInitialized: (ctr) {
controller = ctr;
},
builder: (context) => Container(
padding: EdgeInsets.symmetric(horizontal: 4.w, vertical: 48.h),
child: Column(
children: [
SizedBox(
width: 250.w,
child: QrImage(
data: jsonEncode(qrJson),
version: QrVersions.auto,
backgroundColor: AppColors.white,
),
),
SizedBox(height: 24.h),
_buildText(
isEnglish ? event.nameEn : event.nameAr,
),
SizedBox(height: 12.h),
_buildText(phoneNumber),
SizedBox(height: 12.h),
_buildText(
DateFormatter.getDDMMYYYY2(eventDay, code: code)),
SizedBox(height: 12.h),
_buildText(isEnglish
? event.locationNameEn
: event.locationNameAr),
],
),
),
),
),
],
),

the widget is printed in leftCenter of papper. how can align it in the center? , as the widget in the center of screen.
thanks

No meaningful example

Can someone provide good example for this plugin and how to print test page? And some documentation what exactly this plugin offers?

I am trying to find something that fits both Android and iOS

CC @ekasetiawans

Permission Restricted State

StreamBuilder( stream: FlutterBluetoothPrinter.discovery, builder: (context, snapshot) { log(snapshot.data.toString()); final list = snapshot.data ?? <BluetoothDevice>[]; return Text(list.toString()); })

the list is providing me an instance of Permission Restricted State

Android 34 Namespace not specified

Hello. When I build the project with gradle 8.0, compilation fails because throwns this error: Namespace not specified

Can you add the namespace in builg.gradle?

android {
namespace "com.group_name.your_project_name"
compileSdkVersion 34

}

iOS print issues

Hi there,
Thank you for your package.
I have an issue with ios printing
as you see below image
the top one is printed by an Android device and the bottom one is printed by an iOS device (iPhone 10)
I really don't know where the white line comes from and how to solve it.
By the way, why do Android devices print faster than iOS devices?

thank you

Papersize 80mm

hi @ekasetiawans, how can i change paper size from 58mm to 80mm ? thank in advance.

The app is crashed when the Bluetooth state is change.

When I'm trying to enable bluetooth, the app is crashed, and throw this exception:

E/AndroidRuntime(21981): FATAL EXCEPTION: main
E/AndroidRuntime(21981): Process: com.paymentcollector, PID: 21981
E/AndroidRuntime(21981): java.lang.RuntimeException: Error receiving broadcast Intent { act=android.bluetooth.adapter.action.STATE_CHANGED flg=0x15000010 (has extras) } in id.flutter.plugins.FlutterBluetoothPrinterPlugin$1@940ada8
E/AndroidRuntime(21981): 	at android.app.LoadedApk$ReceiverDispatcher$Args.lambda$getRunnable$0$LoadedApk$ReceiverDispatcher$Args(LoadedApk.java:1796)
E/AndroidRuntime(21981): 	at android.app.-$$Lambda$LoadedApk$ReceiverDispatcher$Args$_BumDX2UKsnxLVrE6UJsJZkotuA.run(Unknown Source:2)
E/AndroidRuntime(21981): 	at android.os.Handler.handleCallback(Handler.java:900)
E/AndroidRuntime(21981): 	at android.os.Handler.dispatchMessage(Handler.java:103)
E/AndroidRuntime(21981): 	at android.os.Looper.loop(Looper.java:219)
E/AndroidRuntime(21981): 	at android.app.ActivityThread.main(ActivityThread.java:8668)
E/AndroidRuntime(21981): 	at java.lang.reflect.Method.invoke(Native Method)
E/AndroidRuntime(21981): 	at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:513)
E/AndroidRuntime(21981): 	at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1109)
E/AndroidRuntime(21981): Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'int android.app.Activity.checkSelfPermission(java.lang.String)' on a null object reference
E/AndroidRuntime(21981): 	at id.flutter.plugins.FlutterBluetoothPrinterPlugin.ensurePermission(FlutterBluetoothPrinterPlugin.java:127)
E/AndroidRuntime(21981): 	at id.flutter.plugins.FlutterBluetoothPrinterPlugin.startDiscovery(FlutterBluetoothPrinterPlugin.java:146)
E/AndroidRuntime(21981): 	at id.flutter.plugins.FlutterBluetoothPrinterPlugin.access$100(FlutterBluetoothPrinterPlugin.java:39)
E/AndroidRuntime(21981): 	at id.flutter.plugins.FlutterBluetoothPrinterPlugin$1.onReceive(FlutterBluetoothPrinterPlugin.java:83)
E/AndroidRuntime(21981): 	at android.app.LoadedApk$ReceiverDispatcher$Args.lambda$getRunnable$0$LoadedApk$ReceiverDispatcher$Args(LoadedApk.java:1786)
E/AndroidRuntime(21981): 	... 8 more
I/Process (21981): Sending signal. PID: 21981 SIG: 9
Lost connection to device.

Not Printing Properly (Some parts are cut)

Android Version: 13
Flutter Version: 3.19.6
Dart Version: 3.3.4
Package Version: 2.16.4

First photo is taken from the app using the Receipt widget. Second photo is the printed result. The printed barcode is smaller compared to the one in the widget. Also, the upper portion of the receipt is skipped (from Account No to Current Usage). Almost seem like it was cut-out.

The argument type 'List<int>'

../../../../.pub-cache/hosted/pub.dev/flutter_bluetooth_printer-2.8.0/lib/src/flutter_bluetooth_printer_impl.dart:66:35:
Error: The argument type 'List' can't be assigned to the parameter type 'Uint8List'.

This occurs on Flutter 3.10.7

Unable to run project when combined with esc_pos_printer library, i need to use both wifi and bluetooth printer.

Print byte characters instead of image

Hi, i got some problems when I try to print for 2nd time. First time, it when though great till it reach the end, some lines can't be create, make it missing the last line. Then, i try it again, this time, i got all symbols, nothing else. So, i try turn off the printer and turn back on, now it normal and i try to print again, it make that error again. Same go for turn off bluetooth and turn back on (Android still got crashed when turn on Bluetooth)

If any one have idea please share.

ekasetiawans / flutter_bluetooth_printer_plugin Goto Github PK

flutter_bluetooth_printer_plugin's People

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flutter_bluetooth_printer_plugin's Issues

Your package has no problem. It works fine!

My solution (I don't know how implement it):

Receipt

Black receipt

change the code to : final additional = [ ...generator.emptyLines(addFeeds), ...generator.text('.'), ];

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change the code to :
final additional = [
...generator.emptyLines(addFeeds),
...generator.text('.'),
];