Barcodes and QR-scanner allows using Android to recognize barcodes and display the resulting image on the screen of the device. It only takes a few seconds to process the data, but the app needs access to the phone's camera to function properly.
Advantages
In order to read the QR code, it is enough to run the program and point the camera at the image, after which the decoding procedure will take place. If a link to a website, guest book or online calendar has been encrypted, the corresponding page will open in the browser. In addition, when the decrypted code contains contact details, such as a number mobile phone or addresses Email, the application will issue a warning and prompt you to choose an action yourself. Among other features:
Barcodes and QR Scanner can be used to send important and confidential information by simply encrypting the data into a barcode. After receiving its image, it is enough to simply delete it.
The program also has an open source, which allows anyone to change and modify some of the application's functions on their own. But please note that the developers will not be held responsible if the application stops working after changes made by the user.
Conclusion
A barcode and QR scanner is an essential addition to any mobile device. QR codes can carry a huge amount of useful information. Many contests often use this method encryption and without such an application, you cannot participate in them. Due to the high speed of work and regular patches from developers, the application has gained great popularity among users of Android devices.
Probably many of you have noticed that not only flyers, but also other information, including useful information, is often accompanied by a QR code. Why is this needed? The fact is that if you write a link to the site instead of a QR code, then you will have to enter this link manually on your device, which is not very convenient. It is much more convenient to just point the camera at the square. With the help of QR codes, not only links to any materials are encrypted, but also programs such as Viber or E-Num are authorized. Therefore, absolutely every smartphone must be equipped with a tool that allows you to read the QR code.
How to scan qr code on android?
In many devices given function already there by default, for example on Xiaomi. The function can be implemented both as a separate application and as an option built into the mobile phone camera. If you haven't found the pre-installed software in your smartphone, then try pointing the camera in shooting mode at this QR code.
If you see any information about the QR code, click on it for more details. It can be a pop-up message or an icon. Here is how it worked on mine Xiaomi Redmi 3S.
After clicking on the inscription "More about the QR code" I opened the scan result. Since the result of the scan is the url address of our site, the program offered me to open the link in the browser by clicking on the "Go to the site" button.
How to read qr code android using programs?
If your smartphone is not able to read QR codes by regular means, then you just need to install third party application from PlayMarket, which allows you to do this. The choice of such applications is great, many of them have similar functionality, we will consider the QR Code Reader application.
Two-dimensional QR codes (quick response) were developed in Japan by Denso-Wave in 1994 for the needs of the automotive industry. Over time, QR codes have become widespread in various fields thanks to effective way storage of encoded information. Anything can act as the information itself: links to websites, phone numbers, email addresses, texts of several thousand characters.
In order to decipher the information embedded in the QR code, you need to scan and read it. Most modern smartphones successfully cope with this task.
How to scan a QR code
To scan the QR code, the built-in cameras of mobile devices are used. Special Application recognizes QR codes, gets their detailed display and decrypts the information contained in them.
Let's consider the solution of the problem of scanning QR codes using the example of applications for the most popular smartphone platforms: iOS for iPhone and Android for mobile devices of various manufacturers.
Application for scanning QR codes on iPhone
To enable iPhone to work with QR codes and scan them, follow these steps. 
An example of scanning QR codes on Android
On the platform android work with QR codes does not fundamentally differ from similar actions on iOS. 
Of course, the application we have reviewed is far from the only program for scanning QR codes on mobile devices. You can try other applications yourself and find the most convenient option among them.
There are also programs for reading QR codes and for personal computers. They can also be successfully used to scan single codes. If you need to work with a large number of codes, then it makes sense to think about purchasing a special hand-held barcode scanner that connects to a computer via a USB port and has much better performance.
Scan QR codes on smartphones with Android is easier than to take a photo. All you need is:
- Smartphone or tablet with a camera;
- Internet.
I will explain everything as simply as possible and give a practical lesson. Right here without departing from the article. You can also scan barcodes using the same instructions.
“The interface of my smartphone may differ from yours due to a different theme and android versions. The differences do not affect the process of installing and using the QR code scanner”
First you need a QR code scanner. I found the easiest one. It has less annoying ads and it scans - what you need. Installing it is very easy. Using is even easier.
- To start, let's go to Google Play market. And we write in the line underlined in red: “qr code scanner”, or better “smart qr scanner and generator”. We click on the search icon or just the drop-down offer that suits us.
In addition, you can download another great scanning application from us -
How to scan a code from a saved picture?
You can also recognize a QR code from an image on the Internet using special websites. I chose qrrd.ru because it is the only site that I have loaded in less than 10 seconds and had a more or less pleasant interface.
How to use it? First, we go to the site: qrrd.ru or directly to qrrd.ru/read. We see the following: 
Circled in green is the site's menu, which lists everything it can do to help you. In our case, select "Recognize QR code".
The next page opens with big button“+Select Files”. We click on it. After that, options like “select files” appear at the bottom. Here you can either immediately take a photo and send it. Or click on the documents and select a photo that is already on the phone. I went the last way. 
Here I selected the tab with pictures, clicked on the folder where the pictures are stored on my phone and clicked on the image with a QR code, the same one that was already here in the article earlier. 
Then it's up to the site. It automatically uploads a photo or picture to itself, and then immediately recognizes and shows the result. 
Ready!.
Why should I scan QR codes at all?
They may contain helpful information. The probability of this is low, but it may be there. In addition, QR codes are often used in museums so as not to put up huge signs with a bunch of information, but simply use a small QR code and give everyone the opportunity to step aside and read about the exhibit on their phone. Everything is simple and convenient. That is why Denso Wave invented them.
QR code is a great stock tool. For example, it may contain a code that must be shown to the seller in order to receive a discount. The applications are huge. Enjoy!
AT recent times two-dimensional QR codes, which are the latest development of Japanese programmers from Denso-Wave, began to gain more and more popularity. The QR code was first used in 1994 in the automotive industry. Over time, the QR code began to gain more and more popularity, the reason for which was the incredible effective method, which contributes to the almost perfect preservation of any encoded data. Today, a QR code can “hide” absolutely any information, whether it is a link to a web resource, a phone number, e-mail address or even a huge text with a volume of a thousand characters.
Like any other program that implies encryption of information, a QR code must have a method for subsequent decryption. The person to whom the data was intended will be able to see the contents only after they scan and read the encrypted message. It is important to know that almost anyone can easily cope with this, at first glance, a very difficult task. modern smartphone.
Scan principle
Initially, the user of the newfangled gadget should learn how to scan a QR code. And for this he will need the built - in camera of the mobile device . After the picture is photographed, a specialized software package will be able to recognize the QR code with high accuracy, in particular, by means of a clear display, decipher the information hidden under it.
In the article below, we will try to consider the principle that will allow you to scan a QR code using programs that can be installed on the iPhone and Android OS. It is worth noting that mobile devices that run on these operating systems can belong to absolutely any manufacturer.
A program that helps to recognize information
OS iPhone
Despite the many functions that a modern smartphone is endowed with, the list standard applications there is no program that can help the iPhone contact and act on the QR code. In order for the gadget to be endowed with specific functions and perform scanning, you need to perform a few simple steps.
To be able to enjoy all the benefits of a specific program, you need to find a resource in the AppStore that helps you download "QR Reader", a program developed by TapMedia. Despite the fact that anyone can download this application for free, while working, you will have to watch self-activated commercials several times.
After downloading the product, you need to install it. To do this, the user must launch it and place the viewfinder, equipped with a red bar moving across the screen of the gadget, directly above the readable QR code. A specific simulation of the infrared beam helps to set up special scanners.
In order to recognize the data as quickly as possible and, importantly, accurately, the code must have good picture. Only a high-quality scanned picture will help to recognize the data and, as a result, display previously encrypted information.
Using a specialized software product is quite simple, since the built-in code will allow you to automatic mode perform its functions. In other words, if a QR code hides a link to an electronic resource, then the site encrypted with the code will open in front of the user in a few seconds using the built-in web browser.
OS Android
From a practical point of view, how a typical application works in mobile device operating on the Android platform is no different from what works on the iPhone OS. The gadget user must go to " Play Store”, using a search engine to find similar in principle to the “QR Reader”.
After installation on Android, the "QR Reader" must be launched, and the previously described method should try to "catch" the QR code with the built-in viewfinder. The operation of the scanner can be tracked by a moving red bar.
At this stage, the "manual" work of the user is completed. After the response software product, indicating the successful receipt of the code, the acquired data will be decrypted, and the smartphone will automatically be able to reproduce the "hidden" actions.
It is worth noting that the article provides an example of one of the most commonly used programs that helps to quickly recognize a QR code. In fact, in the vast world wide web you can find many typical developments that will just as well cope with the tasks assigned to them. Surely, after using several options, the user will be able to choose his own, the most suitable product for him.
Conclusion
Do not assume that only a smartphone can scan a QR code, because most desktop computers have the same capabilities. True, the PC will be able to scan single codes. Therefore, if necessary, regularly work with large volumes hidden information, it is best to purchase a specialized handheld scanner that connects to a computer via a USB output. Such a device is very efficient in operation and is characterized by fast response.
