The scanned content is retrieve from the textview. Then we create the on click listener for the browser launch button. The layout defined in the earlier activity_main.xml. It is the entry point for our android application. The onCreate() function is called when our Qr code reader application is started. ![]() Package sg.nighthour.qrcodereader import import import android.os.Bundle import import import .android.IntentIntegrator import .activity_main.* class MainActivity : AppCompatActivity () This article will not go into details on how to do this, but it can be done graphically using the designer.Īll our application and kotlin code are in the MainActivity.kt file. Using the scanned content as the website or URL.īoth the textview and the button are centered in the screen using constraint layout with chains and guidelines. The textview willīe used to display the content of the scanned QR code, and the button is used for launching an external browser In our MainActivity source code, we will refer to these views using their respective id. The id for the textview is tvResult and for the button is btnLaunch. There is a textview and a button defined. The following shows the content for activity_main.xml. This layout isĭefined in the res folder - >layout -> activity_main.xml.Īndroid Studio has a visual designer for creating layouts. The zxing embedded android library, open up the adle file for the Module:app in Android Studio.Īt the dependencies section, add in the following line.įor android development, we will also need to create the layout for the user interface.Īs explained earlier, the main user interface will have only a textview and a button. The full source code for the application is available at the Github link at the end of the article.Īndroid Studio uses gradle for dependencies and to build the application. Note, Android Studio may download the system image if it is not available locally. Give the Android Virtual Device a name, in this case, we set it to "TestphoneAndroid7".Ĭlick Finish and the device will be created. Click Next.įor System image, we select Android 7.0 (Nougat). Start up the AVD Manager after the project is created.Īt the hardware selection, we chose 5.1" WVGA. The langugae is kotlin and the minimum Android to be supported is 4.4 (Kitkat). The source are placed under the sg.nighthour.qrcodereader package. We gave our a project a name, QRCodeReader. Fill in the project details like the following You can start a new project, selecting the empty activity. Note, if you are running Android Studio for the first time, you may have to create a new project first. Select Tools -> AVD Manager from the menu. We will use the android emulator to test the application and then an actual LG android 7 phone that I am using.įor ease of testing, we can create a emulator device using the Android Studio AVD manager. The following shows a screenshot of what the user interface will look like. The zxing Qr code scanner upon start, obtain the scan result, display the detected content in the textviewĪnd launch a browser with the url address when the button is clicked. The QR code reader application contains a single main activity, with a textview and a button. The application will be written in kotlin, the new language for programming This article assumes that all the required software has been installed and setup. We will use the 3.6.0 release of the zxing embedded android library for compatibility We will build the app using a Ubuntu 18.04 LTS Desktop, with OpenJDK 11 (LTS) and the However,įor someone new to android development, there are still many things to learn. Zxing embedded android library from journeyapps does all the heavy lifting.īasically, there isn't a lot of logic required for the android application. This is also an opportunity to learn kotlin and android development. You can then use your own QR code reader application, without advertisements and without excessive permissions, for the SafeEntryĬheck in and check out. It is relatively easy to build a simple QR code reader application using the In the Google playstore, a lot of them have advertisements or require a lot of permissions. While there are many free QR code applications Older phones, there is a need to download a QR code scanner/reader application. Some of the newer android phones come with a built in functionality for scanning QR code. It uses the popular Zxing android embedded library for processing the QR code. This article shows how to create a simple android application that can scan a QR code containing a URL and To the specified URL for checking in and out. The SafeEntry system encodes specific URL into QR code that can be scanned by smartphone, which launches a browser To fight against the spread ofĬovid 19, Singapore requires the use of SafeEntry for registering entries and exits to various places. The recent Covid 19 has brought about many changes in our society. Adopt and change before any major trends of changes.
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