React Native Honeywell Barcode Reader

This package works with Honeywell devices that have an integrated barcode scanner, like the Honeywell EDA50K (tested).

Actually, I custom from https://github.com/Volst/react-native-honeywell-scanner but fix cannot remove event listener (even you close the reader). And if you don't remove, the event will fire twice, triple... more and more times when you call addListener until you kill the app.

The bug at here is you can not remove event listener by call DeviceEventEmitter.removeListener(eventName, handler) since it doesn't have this method. Follow here: https://stackoverflow.com/questions/36886628/how-do-you-remove-a-listener-from-react-natives-eventemitter-instance

Installation

npm i rn-honeywell-reader

Link automatically:

react-native link rn-honeywell-reader

Link manually (recommend):

1. In app\build.gradle add

compile project(':rn-honeywell-reader')

2. In settings.gradle add

include ':rn-honeywell-reader'
project(':rn-honeywell-reader').projectDir = new File(rootProject.projectDir, '../node_modules/rn-honeywell-reader/android')

3. In MainApplication.java

Add this line to import package

import com.honeywell.reader.HoneywellBarcodeReaderPackage;

and add this line to getPackages()

new HoneywellBarcodeReaderPackage()

Usage

First you'll want to check whether the device is a Honeywell scanner:

import HoneywellBarcodeReader from "rn-honeywell-reader";

HoneywellBarcodeReader.isCompatible; // true or false

The barcode reader needs to be "claimed" by your application; meanwhile no other application can use it. You can do that like this:

HoneywellBarcodeReader.startReader().then((claimed) => {
  console.log(claimed ? "Barcode reader is claimed" : "Barcode reader is busy");
});

To get events from the barcode scanner:

HoneywellBarcodeReader.onBarcodeReadSuccess((event) => {
  console.log("Received data", event);
});

HoneywellBarcodeReader.onBarcodeReadFail(() => {
  console.log("Barcode read failed");
});

To free the claim and stop the reader, also freeing up resources:

HoneywellBarcodeReader.stopReader().then(() => {
  console.log("Freedom!");
});

To stop receiving events:

HoneywellBarcodeReader.offBarcodeReadSuccess();
HoneywellBarcodeReader.offBarcodeReadFail();