cordova-barcode-scanner-gmv

This is a fork of this project: https://www.npmjs.com/package/cordova-gmv-barcode-scanner. This plugin works for android and iOS without the use of cocoapods. Every framework will be added automatically as you install this plugin.

Purpose of this Project

The purpose of this project is to provide a barcode scanner utilizing the Google Mobile Vision library for the Cordova framework on iOS and Android. The GMV library is incredibly performant and fast in comparison to any other barcode reader that I have used that are free. Additionally, I built it to perform live validity checks on VIN numbers for use as a VIN scanner.

Installation

To install, simply run the cordova plugin add command on this git repository.

Android

If you are using this plugin for the Android platform, it is important that you place the following code inside the config.xml file in the root of your Cordova project. This is a preference that will be utilized by the cordova-custom-config library, which is included as a dependency of the plugin, so that the theming is provided to Android. If you do not do this then the plugin will crash the application when initializing a scan..

<preference name="android-manifest/application/@android:theme" value="@style/Theme.AppCompat" />

Usage

To use the plugin simply call CDV.scanner.scan(options, callback). See the sample below.

CDV.scanner.scan({vinDetector: true}, function(err, result) { 
    
	//Handle Errors
	if(err) return;
	
	//Do something with the data.
	alert(result);
	
});

Plugin Options

The default options are shown below. Note that the detectorSize.width and detectorSize.height values must be floats. If the values are greater than 1 then they will not be visible on the screen. Use them as decimal percentages to determine how large you want the scan area to be.

var options = {
	types: {
		Code128: true,
		Code39: true,
		Code93: true,
		CodaBar: true,
		DataMatrix: true,
		EAN13: true,
		EAN8: true,
		ITF: true,
		QRCode: true,
		UPCA: true,
		UPCE: true,
		PDF417: true,
		Aztec: true
	},
	detectorSize: {
		width: .5,
		height: .7
	},
	vinDetector: false
}

Android Quirks

The detectorSize option does not currently exclude the area around the detector from being scanned, which means that anything shown on the preview screen is up for grabs to the barcode detector. On iOS this is done automatically.

The flashlight/torch on Android does not currently work. I do not have an Android device to develop with, and the flashlight doesn't work in emulators, so I have yet to solve the issue. Please submit a PR if you have the solution to the issue.

VIN Scanning

VIN scanning works on both iOS and Android and utilizes both Code39 and Data Matrix formats. The scanner has a VIN checksum validator that ensures that the 9th VIN digit is correctly calculated. If it is not, the barcode will simply be skipped and the scanner will continue until it finds a valid VIN.

Commercial Use

This VIN scanner is the primary reason I built out this project, and is used in a commercial application for my company. Additionally, PDF417 scanning on drivers licenses is a massive benefit to the speed of the GMV library. I'd ask that any competitors don't utilize the VIN scanner for vehicles or PDF417 scanner for drivers licenses in applications that offer similar service to the dealr.cloud application.

Maybe it's stupid for me to ask this, but I wanted to make this project MIT and open because I have always had trouble finding a good scanner for cordova and I wanted to help out other developers. Figured a bit of an ask is in order! :-)

Project Info

I am not a native developer and basically hacked both of the implementations together. That being said, in testing the plugins look fantastic, significantly more modern than other scanners, and they scan incredibly quickly. Please send @forrestmid a private message, or just submit a pull request, if you have any inclination towards assisting the development of this project!