Qr code reading in mobile app

[cater25]

I am developing a mobile app in PowerApps that will read a Qr code and display the information in a drop down list.

I can read the QR code and display the information on the desktop version without any problem,
But in the mobile app, the QR code can be scanned, but the information is not displayed.
I have checked the app settings and permissions and everything seems fine.

Please let me know if you know the cause of the problem.

[JatinSaini]

Hi @cater25 ,

Of course, let's go through the potential fixes step by step:

1. Screen Size and Layout: Ensure that the dropdown list is placed within the visible area of the screen and that it is not hidden behind any other elements. You can adjust the positioning of the dropdown list by moving it to a more prominent location on the screen.

2. Data Source Connection: Verify that the data source for the dropdown list is connected to the QR code scanner's output correctly. If the data is not being populated, double-check the formula or expression used to retrieve the scanned QR code information and make sure it is assigned to the dropdown list's Items property.

   For example, if you are using a formula like QRScanner.Output, ensure that it is used in the proper context like Dropdown1.Items = QRScanner.Output.

3. Mobile Platform Compatibility: Review the components you are using in the app and check their compatibility with mobile platforms. If there are known issues, consider using alternative components that work well on mobile devices.

4. OnScan Event Handling: Inspect the OnScan event and any related actions or formulas. If the scanned QR code data is not being handled correctly, adjust the formula to populate the dropdown list. You may use the Set function or update a variable with the scanned information and use that variable as the source for the dropdown list.

   For example:

   OnScanQRCode: Set(ScannedData, QRScanner.Output)

   Then, set the Items property of the dropdown list to use ScannedData.

5. Refreshing the Dropdown List: Add a "Refresh" action to the OnScan event to force the dropdown list to update when the QR code is scanned. You can do this by setting the dropdown list's Items property again with the updated data source.

   For example:

   OnScanQRCode: Set(ScannedData, QRScanner.Output); Dropdown1.Items = ScannedData

6. Debugging and Error Handling: Implement proper error handling to identify any issues that may be occurring during the QR code scanning or data retrieval process. Use labels or notifications to display error messages or log messages to the console to help you identify potential errors.

7. PowerApps Version: Ensure that you are using the latest version of PowerApps, as updates may include bug fixes and improvements that could resolve the issue.

8. Test on Different Devices: Test your app on various mobile devices with different operating systems and screen sizes to see if the issue is specific to a particular device or platform.

After making these changes, save and publish your app. Test the app again on a mobile device to see if the issue is resolved. If the problem still persists, you may need to share more specific details about your app, including the formulas and components used, so that we can further investigate the issue and provide more targeted assistance.

[cater25]

Hi @JatinSaini ,
Thank you for your kind response.
I checked the contents from the top, but it did not improve the problem.

It seems that the problem only occurs on Android, as it worked fine on iOS.