The best code scanning plug-in of flutter

best code scanning plug-in plug


For a long time ,Flutter All lack a simple and easy to use , Powerful QR code 、 Bar code scanning library , Need to be able to support both camera scanning code , It can also support local image code recognition . To solve this problem , I investigated the original scanning Ecology , Select the powerful HUAWEI ScanKit SDK, It was Flutter Package of plug-in .

Huawei's ScanKit SDK Support both Android, Also support iOS, At the same time, it also has the function of scanning code interface and library selection , It's very suitable to introduce Flutter The world .

Warehouse address : flutter_scankit

Chinese document

This is a code scanner Flutter plug-in unit , It is HUAWEI ScanKit SDK Of Flutter package .HUAWEI ScanKit It's a powerful library , Easy to use , The recognition rate of fuzzy smudge code is high , Code recognition speed is super fast .

Thanks to Huawei's ability to accumulate in the field of computer vision ,Scan Kit It can realize the detection and automatic amplification of long distance code or small code , At the same time, aiming at common complex code scanning scenarios ( Like reflection 、 Dark light 、 Stain 、 Fuzzy 、 cylinder ) It has done targeted identification optimization , Improve code scanning success rate and user experience .

  • Android
  • iOS

Sweep code

Scan Kit Support scanning 13 It's a global mainstream code system . If your application only deals with some specific code formats , You can also refer to custom type in the interface to speed up code scanning . Supported code formats :

  • One dimensional code :EAN-8、EAN-13、UPC-A、UPC-E、Codabar、Code 39、Code 93、Code 128、ITF-14
  • QR code :QR Code、Data Matrix、PDF417、Aztec

Support camera scan code and local image code recognition .

usage

  1. Configure permissions
  2. Processing permission requests
  3. call API

Configure permissions

iOS

Add the following to ios/Runner/Info.plist in

 <key>NSCameraUsageDescription</key>
<string> Explain to the user why you need this permission </string>
<key>NSPhotoLibraryUsageDescription</key>
<string> Explain to the user why you need this permission </string>
 Copy code 

Be careful , Replace <string></string> Content of the label , Give the user a reason to need the permission .

Android doesn't need to be configured !

Permission request

stay Flutter in , You need a plug-in library to handle permissions , Here's another plug-in library I recommend :flutter_easy_permission, For detailed configuration, please see here .

open ios/Podfile file , Add the following configuration :

target 'Runner' do
flutter_install_all_ios_pods File.dirname(File.realpath(__FILE__))
# Add the library of permissions you need here
pod 'LBXPermission/Camera'
pod 'LBXPermission/Photo'
end
 Copy code 

Then execute the command to install .

call API

 void initState() {
super.initState();
scanKit = FlutterScankit()
..addResultListen((val) {
// Return recognition results 
debugPrint("scanning result:$val");
});
FlutterEasyPermission().addPermissionCallback(
onGranted: (requestCode, perms,perm) {
startScan();
},
onDenied: (requestCode, perms,perm, isPermanent) {});
}
 Copy code 

Scan the code:

 // If you don't have permission, request 
if (!await FlutterEasyPermission.has(perms: _permissions,permsGroup: _permissionGroup)) {
FlutterEasyPermission.request(perms: _permissions,permsGroup: _permissionGroup);
} else {
// If you have permission, call 
startScan();
}
Future<void> startScan() async {
try {
await scanKit.startScan(scanTypes: [ScanTypes.ALL]);
} on PlatformException {}
}
 Copy code 

About FlutterEasyPermission Usage of , Please check out here .

Example

A complete example , Please have a look at here .

TODO

SDK It supports custom code scanning UI, But the plug-in has not been deeply packaged yet , Unable to support custom page , I'm going to take a little space later , Deep encapsulation through external texture , Support directly in Flutter Widget Layer custom scan interface .

Plug-in development

If you are right about Flutter I'm interested in plug-in development content , You can go to my online school to check 《Flutter Full plank development - Advanced 》 Curriculum , Exclusive in-depth analysis of the whole network about Flutter All aspects of plug-in development , The actual combat explains many cases ( Contains the plug-in development process )

Welcome to the official account : The way of programming is from 0 To 1

版权声明
本文为[The way of programming from 0 to 1]所创,转载请带上原文链接,感谢
https://qdmana.com/2021/05/20210503144051145I.html

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