Using those three parameters as we have in the render function above gives the following result:Īs mentioned, RNCamera abstracts the native parts of the camera module into a universal cross-platform language. A type property which tells us what kind of barcode it is (2D, QR, etc.).A data property that shows us what is encoded in that specific barcode.A bounds property to tell us where on our screen the barcode was found, which we’ll use to render the overlay for it.Here’s how our should look after adding onGoogleVisionBarcodesDetected: ) => ( It supports only a single barcode at a time-using it as a fallback is left as an exercise for the reader. Note: The onGoogleVisionBarcodesDetected QR code technology is only available on Android, but if you’d like a cross-platform approach, you’d better go with onBarCodeRead. Note that onGoogleVisionBarcodesDetected returns an object containing the barcodes property, which contains an array of all the barcodes recognized in the camera. Let’s add that in the component and link it to a barcodeRecognized function to take care of it. In order to read barcode information, we will use the onGoogleVisionBarcodesDetected prop so that we can call a function and extract the information.
Let’s use RNCamera’s algorithm to recognize what is written inside each of them. Now we can see barcodes (as we can see our test QR codes showing on the monitor above) but we can’t read them yet. You must also add the following permissions to android/app/src/main/AndroidManifest.xml: package="com.cameraexample">Īfter adding this code, your interface should have the camera on, full-screen, just like the screenshot below: (There are others like Mostly automatic install with CocoaPods and Manual install, but we will stick to the first option, as it’s the most efficient.) Simply run: npm install react-native-camera -save We will use the “Mostly automatic install with react-native” option. Now it’s time to install the react-native-camera package in our project. It should look like the screenshot below: Now let’s deploy the first version of our React Native Camera example over our phone. (To be sure, there is a more detailed and up-to-date list in the docs.)įirst let’s get started by creating a new React Native project: react-native init CameraExample Our setup needs a minimum of JDK version 1.7 (which you most likely have) and if you’re on Android you’ll require buildToolsVersion newer than 25.0.2. Creating Your First App Using RNCameraīefore we begin our React Native QR scanner, there are some dependencies we’ll need to install. Note: React Native Camera is heavily based on the Expo camera module and going back and forth between the two is pretty easy. …so make sure to use RNCamera so that you can keep getting the latest updates. Note that RNCamera used to come in two flavors: You can build your apps around these functions without getting into the hassle of native code. This component helps you communicate with the native OS through some simple functions so you can use device hardware. React Native Camera (RNCamera) is the go-to component when it comes to implementing camera functionality in a React Native app. Facebook, Airbnb, Uber, and many others already have their latest apps built with React Native. React Native is a valuable framework that borrows React’s paradigm and design principles to enable lightning fast, cross-platform development of snappy UIs. (Note: If you need help setting this up, you can always refer to the React Native Getting Started page-don’t forget to click on the “React Native CLI Quickstart” button, as “Expo CLI Quickstart” comes preselected at the time of writing this article.) Why React Native? We will be using React Native’s CLI Quickstart. It will be able to read QR codes in real time and render their content to the screen at the time of detection. Creating QR codes is as easy as reading them.In this React Native Camera tutorial, we will create a QR code reader app. QR Code generationĬodeTwo QR Code Desktop Reader & Generator also acts as a QR code generator. To use this option, simply click From webcam, and you will be able to scan QR codes with your recording device. If you have more than one camera, the program will let you choose which one to use. That is not all, you can also use your camera to scan QR codes. Just click From clipboard and the program will automatically locate and decode the QR code for you. If you have a file copied to your clipboard, or if you make a screenshot of a QR Code, QR Code Desktop Reader & Generator will let you decode those QR codes in one click. To do that, simply click From file on the top menu of the program and select the desired image from your hard drive. You can also select an image file that contains a QR Code and the program will locate it automatically and decode it.
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