flutter_scan's Introduction

scan

scan qrcode & barcode in widget tree.

decode qrcode & barcode image from path.

if you want to generate qrcode image, you should use qr_flutter

Features

use ScanView in widget tree to show scan view.
custom identifiable area.
decode qrcode from image path by Scan.parse.

prepare

ios

info.list

<key>NSCameraUsageDescription</key>
<string>Your Description</string>

<key>io.flutter.embedded_views_preview</key>
<string>YES</string>

android

<uses-permission android:name="android.permission.CAMERA" />

<application>
  <meta-data
    android:name="flutterEmbedding"
    android:value="2" />
</application>

scan: ^newest

import 'package:scan/scan.dart';

Usage

show scan view in widget tree

ScanController controller = ScanController();
String qrcode = 'Unknown';

Container(
  width: 250, // custom wrap size
  height: 250,
  child: ScanView(
    controller: controller,
// custom scan area, if set to 1.0, will scan full area
    scanAreaScale: .7,
    scanLineColor: Colors.green.shade400,
    onCapture: (data) {
      // do something
    },
  ),
),

you can use controller.resume() and controller.pause() resume/pause camera

controller.resume();
controller.pause();

get qrcode string from image path

String result = await Scan.parse(imagePath);

toggle flash light

controller.toggleTorchMode();

proguard-rules

-ignorewarnings
-keepattributes *Annotation*
-keepattributes Exceptions
-keepattributes InnerClasses
-keepattributes Signature
-keepattributes SourceFile,LineNumberTable
-keep class com.huawei.hianalytics.**{*;}
-keep class com.huawei.updatesdk.**{*;}
-keep class com.huawei.hms.**{*;}