How To Use A Bar Code On A Phone

Nowadays, with such a form of interaction with the electronic environment as a QR code, a person is faced at every step. The page of a newspaper or magazine, a poster in a movie theater, a sign on a monument of architecture. on all such media you can find a pattern of black and white squares in which useful information is encrypted.

And if the classic bar code in the form of stripes requires sophisticated equipment, then you can read the QR code using a regular Android smartphone and a special application.

In our article, we will talk about what a QR code is and explain how to use a QR code scanner for Android.

What is a QR code?

The history of the QR code begins in 1994 in Japan. By that time, it became clear that for the needs of the industry, a barcode with standard product information was no longer enough. It was necessary to find a way to encode data in a small graphic code that anyone could access. The solution was found by Denso-Wave developers.

The QR code proposed by the company (from English quick response. quick response) is a two-dimensional barcode consisting of points that are recognized by the sensor, converted to binary numbers and converted according to a certain algorithm.

The QR code is convenient in that it allows you to encrypt several thousand characters in one picture. At the same time, the size of the QR code can vary greatly from a small centimeter square to a large image that can be placed on any flat surface.

Where does the QR code apply

QR codes were very popular among smartphone users. Having installed the scanner program, you can follow the link to the site, receive and save text information on the phone, send SMS, add certain contacts to the phone book.

Museums place QR codes at various cultural sites. Thanks to them, tourists and residents of the city can find out interesting facts about a particular architectural monument or monument.

Progressive Japanese equipped with QR codes even gravestones in the cemetery. In this case, the code encrypts the date of birth and death of the deceased and his short biography. And in the Chinese city of Hefei, elderly people are provided with QR code badges. If an elderly person gets lost in the streets, passers-by will find out his address through a QR code and help him return home.

Video: How To Use A Bar Code On A Phone

And in 2012 in Omsk a whole poem “Eugene Onegin” was translated into a QR code and published in the form of a miniature book, thus combining literary classics and modern electronic technologies.

Android QR Code Recognition Applications

As noted above, a minimum of funds is required to read the QR code: a mobile phone with a rear or front camera and an application that will turn the camera into a scanner.

The most popular QR code scanning applications are:

  • QR Droid Code Scanner
  • QR Code Reader
  • QR Barcode Scanner
How To Use A Bar Code On A Phone

QR Droid Code Scanner

OS Version: Android 2.0 or later

A simple and convenient scanner with a quick response that allows you to read both QR codes and standard barcodes. The application recognizes codes using both the camera and manual entry of characters. In addition, the program decrypts the code from the image from the phone’s gallery.

When reading the code, the application saves it in History. Here you can open an existing code, edit it or share it with friends.

QR Code Reader

OS Version: Android 4.0 or later

Completely free application, without any annoying ads. In low light, the program automatically turns on a flashlight, which highlights the QR code. After scanning, either text is displayed on the smartphone, or a button appears to go to the site.

QR Barcode Scanner

OS Version: Android 3.0 or later

One of the most popular QR code recognition applications. It works quickly, does not load the battery and processor, and at the same time it downloads for free.

If you want to try out several applications for reading QR codes, we recommend that you do not clog the device’s memory with them, but install programs on an external SD memory card. For information on how to do this, see the article “How to install applications on a memory card”.

How to use a QR code on Android

Regardless of which application you install on your smartphone, the algorithm of actions will be similar:

  • Install and run the application
  • Point the camera lens at the QR code
  • Wait for the application to recognize the code
  • Perform an action encrypted in code

How to create a QR code

The convenience of QR codes lies in the fact that any user of a PC or smartphone can encrypt information with their help. On the computer, you can generate a QR code on the site QR

Here you can encode:

  • Text
  • Link to the site
  • Business card
  • SMS message

You can create your own QR code using one of the applications we mentioned. For example, consider the process of generating code through the QR Droid Code Scanner:

  • Open the application desktop
  • Click on Share
  • Select the contents of your QR code. It can be a business card, link, contact or text.
  • Select, for example, a URL, type in the address and click on the button in the upper right corner
  • After creating a QR code, you can edit it: put a frame, change color or size

The next lesson will be devoted to how to transfer contacts from a smartphone to a PC. Do not miss!