Button to increase brightness for QR certificate tab

[eltos]

When presenting a QR code to be scanned (e.g. during entrance control), the screen brightness might be insufficient and has to be increased for the scan to succeed.

Current Implementation

The user has to increase screen brightness from the OS settings. In corona-warn-app/cwa-app-android#4606 an improvement was suggested and meanwhile implemented, which increases the screen brightness when the QR code is shown in full screen. While being an improvement, this requires several steps which are not quite intuitive for the user.

Suggested Enhancement

To further improve this, I propose to add a toggle action item to the toolbar in the certificates tab (as in the screenshot below) for this purpose. This will allow to quickly increase the screen brightness with only a single tap if required.

Screenshot

Expected Benefits

This has several advantages:

• Intuitive to the user
• Fast, speeds up the scanning process (which is especially important to reduce queuing at entrance controls)
• Not disturbing, since it's not enabled by default

Also, there is enough space available.

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If you want, I'd volunteer to propose an implementation and submit a PR on the matter. Please let me know for which base branche. See eltos/cwa-app-android@e478237

I am opening this as a dedicated issue as suggested in corona-warn-app/cwa-app-android#4606 (comment)

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Internal Tracking ID: EXPOSUREAPP-12360

[larswmh]

Thanks for your enhancement request @eltos. We have created an internal ticket for it and will raise this topic internally.
Internal Tracking ID: EXPOSUREAPP-12360

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Corona-Warn-App Open Source Team