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The Flutter plugin for iOS and Android to decoding QR codes.

License: MIT License

Kotlin 22.39% Swift 17.53% Objective-C 5.48% Dart 34.27% Ruby 17.75% Shell 2.58%

flutter-plugin qrcode qrcode-decoder android ios

qr_code_tools's Introduction

QR Code Tools

The Flutter plugin for iOS and Android to decoding QR codes.

Installation

First, add qr_code_tools as a dependency in your pubspec.yaml file.

iOS

Add one rows to the ios/Runner/Info.plist:

one with the key Privacy - Photo Library Usage Description and a usage description.

Or in text format add the key:

<key>NSPhotoLibraryUsageDescription</key>
<string>Can I use the photo library please?</string>

Android

Nothing to do

Example

import 'package:qr_code_tools/qr_code_tools.dart';

String _data;

/// decode from local file
Future decode(String file) async {
  String data = await QrCodeToolsPlugin.decodeFrom(file);
  setState(() {
    _data = data;
  });
}

For a more elaborate usage example see here.

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qr_code_tools's Issues

Android error

I found a problem in version 0.1.0

andoird gradle plugin version error

Crash happens when decode QR in a big size jpg image in Android.

If this image is jpg type, and size is around 20MB, will crash in Android. There is no issue with a 25MB png file.

For iOS, like iPadOS 14.5, works well.

Env:
Plugin version: 0.0.7

Android: tablet, Android 9.0.

20MB JPG Image Sample

30MB JPG Image Sample

....
E/AndroidRuntime(15350): java.lang.OutOfMemoryError: Failed to allocate a 840500016 byte allocation with 12582912 free bytes and 190MB until OOM, max allowed footprint 14148688, growth limit 201326592
E/AndroidRuntime(15350):        at com.aifeii.qrcode.tools.QrCodeToolsPlugin.onMethodCall(QrCodeToolsPlugin.kt:44)
E/AndroidRuntime(15350):        at io.flutter.plugin.common.MethodChannel$IncomingMethodCallHandler.onMessage(MethodChannel.java:233)
E/AndroidRuntime(15350):        at io.flutter.embedding.engine.dart.DartMessenger.handleMessageFromDart(DartMessenger.java:85)
E/AndroidRuntime(15350):        at io.flutter.embedding.engine.FlutterJNI.handlePlatformMessage(FlutterJNI.java:818)
E/AndroidRuntime(15350):        at android.os.MessageQueue.nativePollOnce(Native Method)
E/AndroidRuntime(15350):        at android.os.MessageQueue.next(MessageQueue.java:326)
E/AndroidRuntime(15350):        at android.os.Looper.loop(Looper.java:160)
E/AndroidRuntime(15350):        at android.app.ActivityThread.main(ActivityThread.java:6758)
E/AndroidRuntime(15350):        at java.lang.reflect.Method.invoke(Native Method)
E/AndroidRuntime(15350):        at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:493)
E/AndroidRuntime(15350):        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:858)
I/Process (15350): Sending signal. PID: 15350 SIG: 9
Lost connection to device.

SWIFT VERSION ISSUE(migrate the code to Swift 4.)

The “Swift Language Version” (SWIFT_VERSION) build setting must be set to a supported value for targets which use Swift.
Supported values are: 4.0, 4.2, 5.0. This setting can be set in the build settings editor.

And I am getting this suggestions in Xcode

The target “qr_code_tools” contains source code developed with Swift 3.x. This version of Xcode does not support building or migrating Swift 3.x targets.

Use Xcode 10.1 to migrate the code to Swift 4.

Can you please migrate it to Swift 4

assets Image or image gallery path does not work

assets Image or image gallery path does not work.

Please see this issue posted on stackoverflow:
https://stackoverflow.com/questions/56883471/how-can-i-read-a-qr-code-from-a-image-in-flutter-using-proper-package

Please share any suggestion.

support null safety

unable to scan qr

tried this:
no feedback from
scanQRDataByImage(String path, ImagePickerQRScanCallback callback) async{
print(path);
async QrCodeToolsPlugin.decodeFrom(path).then((data){
print("SCANNED DATA");
print(data);
});
}

'Specify Swift version' ?

hi there,

If i try to build on iOS, i get this:

qr_code_tools does not specify a Swift version and none of the targets (Runner) integrating it have the
SWIFT_VERSION attribute set. Please contact the author or set the SWIFT_VERSION attribute in at least one of
the targets that integrate this pod.

i'am using Flutter stable, v1.9.1+hotfix.6
on Mac OS X 10.13.6 / Xcode 10.1

do you have any idea have to make it work ?

any help appreciated :)
thanks,
matthias