Скачать или смотреть How to Scan QR Code in Android Programmatically

Learn how to implement QR code scanning functionality in your Android app using programmatically controlled methods. Explore step-by-step instructions to integrate QR code scanning into your Android application with ease.
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QR (Quick Response) codes have become ubiquitous in today's digital landscape, offering a convenient way to transfer data or access information. Implementing QR code scanning functionality in your Android app can enhance user experience and streamline various processes. In this guide, we'll walk through the steps to achieve this programmatically.

Step 1: Add Dependencies
Ensure your project's build.gradle file includes the necessary dependencies for QR code scanning. The most common library used for this purpose is ZXing (Zebra Crossing). Add the ZXing library to your dependencies:

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Step 2: Design Layout
Design your app's layout to include a surface view or a texture view to display the camera preview. Additionally, you may include UI elements like buttons for initiating the scanning process.

Step 3: Initialize Scanner
In your activity or fragment, initialize the barcode scanner. Configure the scanner settings as needed, such as enabling specific barcode formats (e.g., QR_CODE) and setting up callbacks to handle scan results.

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Step 4: Handle Scan Results
Define a method to handle the scan results returned by the scanner. Typically, this involves extracting the scanned data from the result object and performing the desired actions based on the data.

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Step 5: Customize Scanner Activity (Optional)
Optionally, you can create a custom scanner activity to customize the scanner's appearance or behavior according to your app's requirements. Extend CaptureActivity from the ZXing library and implement the necessary customization.

Conclusion
By following these steps, you can seamlessly integrate QR code scanning functionality into your Android application. Whether you're building a shopping app, a ticketing system, or a digital payment solution, QR code scanning offers a versatile solution for various use cases. With the ZXing library and programmatically controlled methods, you have the flexibility to tailor the scanning experience to suit your app's needs.