fast_qr_reader_view 0.2.0 copy "fast_qr_reader_view: ^0.2.0" to clipboard
fast_qr_reader_view: ^0.2.0 copied to clipboard

A multi-code reader widget with live preview for both iOS and Android. Using native code for detection, scans QR, PDF417 and CODE39 among others.

Fast QR Reader View Plugin #

See in pub

A Flutter plugin for iOS and Android allowing access to the device cameras to scan multiple type of codes (QR, PDF417, CODE39, etc). Heavily based on camera

Red box is a Flutter animation (removable). Low FPS due to GIF

Features: #

  • Display live camera preview in a widget.
  • Uses native AVFoundation code detection in iOS
  • Uses ML Kit in Android

Installation #

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

iOS #

Add a row to the ios/Runner/Info.plist with the key Privacy - Camera Usage Description and a usage description.

Or in text format add the key:

<key>NSCameraUsageDescription</key>
<string>Can I use the camera please?</string>

Android #

Add Firebase to your project following this step (only that step, not the entire guide).

Change the minimum Android sdk version to 21 (or higher) in your android/app/build.gradle file.

minSdkVersion 21

Example #

Here is a small example flutter app displaying a full screen camera preview.

import 'dart:async';
import 'package:flutter/material.dart';
import 'package:fast_qr_reader_view/fast_qr_reader_view.dart';

List<CameraDescription> cameras;

Future<Null> main() async {
  cameras = await availableCameras();
  runApp(new CameraApp());
}

class CameraApp extends StatefulWidget {
  @override
  _CameraAppState createState() => new _CameraAppState();
}

class _CameraAppState extends State<CameraApp> {
  QRReaderController controller;

  @override
  void initState() {
    super.initState();
    controller = new QRReaderController(cameras[0], ResolutionPreset.medium, [CodeFormat.qr], (dynamic value){
        print(value); // the result!
    // ... do something
    // wait 3 seconds then start scanning again.
    new Future.delayed(const Duration(seconds: 3), controller.startScanning);
    });
    controller.initialize().then((_) {
      if (!mounted) {
        return;
      }
      setState(() {});
      controller.startScanning();
    });
  }

  @override
  void dispose() {
    controller?.dispose();
    super.dispose();
  }

  @override
  Widget build(BuildContext context) {
    if (!controller.value.isInitialized) {
      return new Container();
    }
    return new AspectRatio(
        aspectRatio:
        controller.value.aspectRatio,
        child: new QRReaderPreview(controller));
  }
}

For a more elaborate usage example see here.

Note: This plugin is still under development, and some APIs might not be available yet. Feedback welcome and Pull Requests are most welcome!

51
likes
40
points
20
downloads

Publisher

unverified uploader

Weekly Downloads

A multi-code reader widget with live preview for both iOS and Android. Using native code for detection, scans QR, PDF417 and CODE39 among others.

Repository (GitHub)
View/report issues

License

MIT (license)

Dependencies

flutter

More

Packages that depend on fast_qr_reader_view