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Home How-to Smartphones Image credit Android It's more important than ever to know how to scan a QR code on Android, with the coronavirus pandemic having given these pixelated squares a new lease of codes provide a speedy means of sharing and receiving information, and post-Covid many businesses are now asking customers to scan QR codes to check into their venues, download their apps and place their to scan a QR code on an iPhone or iPadHow to delete apps on AndroidHow to take a screenshot on AndroidThere are hundreds of QR code scanners for Android devices in the Google Play store, but many are stuffed with ads or have dubious privacy policies. Besides, your phone should be able to scan QR codes without you needing to install an app. But beware scam QR codes, which do exist and are easily to stick anywhere.Here are the best methods to use to scan a QR code on your Android to scan a QR code on Android Use your Android camera appMost Android phones now let you scan QR codes using the built-in camera app, to save you installing a third-party QR code reader. If your phone is running Android 9 Pie or later, its camera will offer this feature through integration with Google open the camera app and point it at a QR code for a few seconds, until it comes into focus — there’s no need to take a photo. Google Lens will automatically detect and decipher the code and display a link, usually to a web page. Tap this link to open and view the code’s contents.Image credit AndroidIf nothing happens when you scan a QR code with your camera, you may need to activate Google Lens manually. Go into your camera app’s settings and switch on Google Lens there. On Samsung phones, which use their own technology for scanning QR codes, ensure that "Scan QR codes" is turned on in the Camera app’s settings. You can also access the "Scan QR code" option by swiping down from the top of your screen to open the Quick Settings to scan a QR code on older Android phonesIf your phone is running Android 8 Oreo, you can scan QR codes with Google Lens via Google Assistant. Either long-press the Home button or say “Hey Google” to open Assistant, then tap the Google Lens icon. Alternatively, install the Google Lens app to add a shortcut to your home older phones that run Android 7 Nougat or earlier, you’ll need to install a third-party app to scan QR codes. We recommend QR Code & Barcode Scanner, which works quickly even when you’re some distance from a code and doesn’t require an internet connection. Also, unlike many free QR code scanners, it’s completely free of to scan a QR code with your Android browserRather than scan a QR code with your camera app and then open its link separately in your browser, some Android browsers let you scan and open codes Samsung phones, you can activate this option in the Samsung Internet browser. Tap the three-line button in the bottom-right corner of the screen, choose Settings and select "Useful features." Switch on "QR code scanner," then tap your address bar and select "QR code icon" to add a scanning shortcut to the Firefox for Android, you can scan a QR code simply by tapping the address bar and pressing Scan. Similarly, in the Edge app for Android, just tap the camera icon in the search box and choose Barcode. Image credit AndroidOddly, Google offers a QR-code scanning feature in the iOS version of Chrome, but not in its Android browser, although Chrome for Android does let you generate your own QR How to backup and restore text messages on Android Get instant access to breaking news, the hottest reviews, great deals and helpful tips. Robert Irvine was previously the How-To Editor at Tom's Guide. He has been writing tutorials about software, hardware, websites and other tech topics since the days of dial-up modems, and was previously the editor of Web User magazine. Robert enjoys cooking, and makes a mean sausage casserole, but is definitely not the celebrity chef of the same name. Most Popular

Chances are you've seen a distinctive black-and-white square plastered somewhere on a menu, box, or subway station. These are QR codes. The initials stand for Quick Response, and these unmistakable square codes were designed to pack lots of information into an easy and fast-scanning format. They were invented in 1994, grew insanely popular, disappeared, and then made a comeback—mostly because you no longer need a dedicated app to use them. Nowadays, QR codes are used for everything from augmented reality advertisements to authenticating designer jeans, to sharing Wi-Fi passwords. More recently, QR codes are a crucial component of Covid-19 tracking programs in many countries, offering people a speedy way to check-in at different locations. They’re also increasingly employed in restaurants and retail stores as shortcuts to digital menus and order systems, and in some countries, you can pay with them without having to touch QR codes are very easy to use. Most smartphones have the ability to scan QR codes baked into the camera. We will show you how to do this, but we’ll also cover what to do if you have an older phone. Wait, do you need a phone first? Check out our guides to the Best Cheap Phones or our guide to how to factory-reset your old phone. If you buy something using links in our stories, we may earn a commission. This helps support our journalism. Learn You Have an iPhoneApple introduced QR code support in 2017. Every iPhone running iOS 11 or later can scan a QR code directly from the camera app. Here’s howOpen the camera the rear-facing camera in Photo the QR code you want to scan on the screen and hold your phone steady for a couple of the notification that pops up to open the link. You will need to be connected to the internet to do this.If You Have an Android PhoneGoogle introduced QR code support in 2018, so most, but not all, phones running Android 9 or later can scan QR codes from the camera app. Here’s howOpen the camera the rear-facing camera in Photo or Camera the QR code that you want to scan on the screen and hold your phone steady for a couple of the notification that pops up to open the link. You will need to be connected to the internet to do this.How to Scan with Google LensAnnoyingly, there’s no easy way to check whether your Android phone can scan QR codes from the camera app without trying it first. If your camera app doesn’t seem to work for you, Google Lens is a good alternative. Google's image-recognition technology can scan QR codes, among other things. It’s baked into Google Assistant, Google Photos, or the Google app on most Android phones, or you can also install the Google Lens app for free. Here’s how to use itTap the color lens icon in Google Assistant, or open the Google Lens the Search the QR code that you want to scan on the screen and hold your phone steady for a couple of the notification that pops up to open the link. You will need to be connected to the internet to do this.Use a QR Code Scanning AppUnfortunately, Google Lens mysteriously doesn’t work on certain phones, but don’t worry, there is another way. If both the camera app and Google Lens fail to work for your Android phone, it may be time to try a third-party QR code scanner app. There are tons of them in the Play Store, but most are filled with ads and demand a suspiciously long list of permissions. We recommend the open-source app QR Code No Ads because it only requires permission to access your camera and it’s ad-free. Here’s how to use itOpen the QR Code No Ads sure the QR code is inside the green corners of the highlighted box and hold your phone steady for a couple of the notification that pops up to open the link. You will need to be connected to the internet to do this.Scan a QR code with ChromeSometimes the QR code you want to scan is on a website on your phone screen. Google has added Google Lens functionality into the Chrome browser, and you can use it on an Android phone or iPhone with these stepsTap and hold on the QR code menu should pop up. Select Search With Google the notification that pops up to open the link. You will need to be connected to the internet to do this.More Great WIRED Stories📩 The latest on tech, science, and more Get our newsletters!A people's history of Black TwitterScientists just looked’ inside Mars. Here's what they foundThis tool calls out thousands of hackable websitesIntel's ambitious plan to regain chipmaking leadershipPower up anywhere with the best travel adapters👁️ Explore AI like never before with our new database🎮 WIRED Games Get the latest tips, reviews, and more🏃🏽‍♀️ Want the best tools to get healthy? Check out our Gear team’s picks for the best fitness trackers, running gear including shoes and socks, and best headphones

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shisu_ka/ QR codes have become much more popular in recent years. They’re widely used to deliver information and facilitate check-ins. While most commonly found as part of native mobile apps, you can also incorporate QR scans into your websites. Here’s how to use the popular jsQR library in combination with Web Workers to offer a high-performance QR scanning experience on the web. We’ll assume you’re already familiar with JavaScript basics and you’ve got a functioning site which you’re ready to add your code to. 1. Getting Started Begin by downloading the jsQR library in pre-compiled distributable format. Make sure it’s publicly accessible on your web server; in this article, we’re assuming the URL is / jsQR is also available as an npm package if you’ve got a build routine configured. This package provides real-time detection of QR codes visible in a video stream. It retrieves the data within the code and supplies it to your application. 2. Getting a Camera Feed The next step is to acquire a MediaStream from the browser. Use the mediaDevices API to get a new stream from the user’s camera const getCamera = async => { if ! { throw new Error"mediaDevices API unavailable."; } const devices = await const cameras = => === "videoinput"; return cameras[0]; }; We’re selecting the first camera which is found. You could add extra logic to enable selection of a specific camera indicated by the user. In a real app, you should also improve the error handling when the mediaDevices API is unavailable. This could be because the user is in an old web browser or they’ve permanently blocked the camera access permission. Use the getCamera function to acquire the video stream. Attach the stream to a element so it can be played and displayed to the user const stream = await getCamera; const video = = stream; await 3. Creating a Canvas The next step is to create a canvas element. The video data will be streamed from the camera onto the canvas where the image pixels will be extracted and fed to jsQR. The canvas needs to be sized to match the dimensions of the video stream. const videoTracks = await const videoTrackSettings = videoTracks[0].getSettings; const canvas = = = const canvasContext = The canvas context will be used in the next step to draw each frame of the video stream onto the canvas. 4. Adding jsQR Add jsQR to your code next. Running jsQR in a web worker lets the browser delegate it to a background process, improving performance. jsQR needs to scan every video frame so running it in your main JavaScript thread can incur severe slowdowns on low-end devices. The main thread and your web worker can communicate using messages. Your main thread will message the jsQR worker each time a new video frame is available. The worker will inspect that frame for QR codes in its background thread, then send a message to the main thread when the frame has been processed. Load your worker in your main JavaScript code and add a message listener const qrWorker = new Worker"/ {data} => { if data { // Data from QR code available // // Handle a successful scan here. } else { // No QR code detected in this frame // // Feed the next frame to the QR worker // now this code is introduced below. tick; } }; Next add to your project. This needs to be publicly accessible at the URL given to the Worker constructor. Browsers will download the web worker at the time it’s needed. importScripts" e => { const {data, width, height} = const qrData = jsQRdata, width, height; }; The importScripts function downloads the jsQR library. This call is equivalent to a tag in your HTML but makes the script’s contents available to your web worker. A message listener is added to receive events from your JavaScript’s main thread. Each event needs to include the data, width, and height of a video frame streamed from the camera. These values are fed to jsQR which will attempt to detect a QR code within the frame. The result is posted back to the main thread. 5. Wiring Everything Up The final step is to create an update loop that feeds video frames to the jsQR worker periodically. const updateJsQr = => { 0, 0, const imageData = 0, imageData, height width } const tick = => requestAnimationFrameupdateJsQr; tick; The tick function requests the browser allocate time to calling updateJsQr before the next repaint. This function gets the current video frame, draws it to the canvas, and then pulls out the resulting image data ready to pass to jsQR. The postMessage method on the worker instance actually sends the data. The worker will then act on the data as shown in the code above. The detection result is communicated back to the main thread which processes it as shown in Step 4. When a QR code is detected, your application should use the retrieved data to move forward in its flow. When there’s no detected code, tick is called again to pass the next frame to the QR worker, ready for assessment. This mechanism ensures you don’t end up overloading the browser by running multiple frame detections concurrently. Each call to jsQR is potentially expensive so you want to wait until the result is known before scheduling another. The loop is only sustained until a successful result is obtained, with jsQR handling one frame at a time. Your site’s UI and its real-time camera preview will remain responsive throughout as the worker runs independently in the background. 6. jsQR Result Data Each successful call to jsQR returns a result object with the following properties data – String data extracted from the QR code this is the only property used in the example above. binaryData – A Uint8ClampedArray containing the raw bytes read from the QR code. version – Detected QR code version. location – An object that describes the position of the detected QR code within the video frame, including points for each corner. No data is available when jsQR fails to detect a code in the provided image. 7. Conclusion Combining jsQR with Web Workers lets you implement high performance QR code scans in your web application. QR codes are an easy and convenient data sharing mechanism which most mobile users are now familiar with. Although you could use jsQR as part of your main loop, you’d need to implement aggressive throttling to keep your UI responsive. This would result in a longer delay before a successful detection. Web Workers are supported in all modern browsers and provide a substantial performance boost to this solution, enabling split-second scans under optimal lighting conditions. READ NEXT › FPS vs. Refresh Rate What Are the Differences?› Is It Bad to Leave Your Phone in the Sun?› Someone Turned a Broken Apple Watch Into a Mechanical Watch› How to Save and Download Instagram Stories› Microsoft Now Sells Replacement Parts for Surface Devices› Sonos One vs. Sonos One SL Which Should You Buy?

QRCode merupakan gambar matriks dua dimensi yang merepresentasikan suatu data, terutama data berbentuk teks (Pasca Nugraha & Munir, 2011). Bukan hanya karena kecepatan dan kemudahan QR Code dalam menyampaikan informasi yang menjadi daya tarik tersendiri, melainkan juga karena QR Code dapat dibuat secara gratis. Sehingga banyak

^{What I want to do is I want the users login to the account on their apps, after when they want to login on the web page, they can just scan the QR Code and automatically login the web page. Currently, I am using Xampp localhost to make my project. I only finished Login and Register web page using PHP. The problem is 1 I want to know how can I get the access token from server? 2 How the server know when I scan the QR Code, that is the same person that want to login to the web page? 3 Do I need to use OAuth2 to check from web page and apps the username or password is it match? I saw lot of example is about how Wechat just scan the QR Code then can login, but if I am using own application, how can I make it like Wechat?} DiiPhone kalian dapat menggunakan fitur Scan QR Codes yang berada di menu pengaturan. Adapun cara scan barcode di HP iPhone sebagai berikut. 6. Cara Scan Barcode di HP iPhone - Pertama buka menu pengaturan di iPhone. - Lalu pilih Kamera. - Setelah itu aktifkan Scand QR Codes dengan klik pada tombol toggle hingga berubah warna hijau.

Setelahterinstal, lakukan scan barcode dan QR code dengan menggunakan langkah-langkah berikut. 1. Buka aplikasi Google Lens, nanti akan langsung terbuka ke mode kamera Google Lens. 2. Arahkan kamera ke barcode dan QR code, lalu tekan tombol Shutter atau ikon kaca pembesar

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