Cwa-documentation: Android version

[AndiLeni]

Hello,

while reading the documentation I came across the sentence "Devices starting with Android and integrated BLE chips will be supported."
This suggests the lack of a specific Android version, from which the app should work.
Maybe you could also specify an API level here.

• Documentation File: solution_architecture.md
• Line / Paragraph: #mobile-applications

[SebastianWolf-SAP]

The requirements and minimum API level are described precisely by Google in their API documentation, see https://static.googleusercontent.com/media/www.google.com/no//covid19/exposurenotifications/pdfs/Android-Exposure-Notification-API-documentation-v1.3.2.pdf

It currently says Android 6.0+, API level 23 - of course with the latest updates to Google Play Services as they contain the Exposure Notification Framework.

EDIT: The previous statement that we don‘t mention the minimum version was not correct. Apologies for any inconvenience...

[SebastianWolf-SAP]

Sorry for the premature issue closing. Just saw that we mentioned the minimum iOS version as well and that the minimum Android version is missing. We‘ll update that...

[MikeJayDee]

Please note that the Google reference app uses a minimum API version of 21 (Android 5.0):

https://github.com/google/exposure-notifications-android/blob/master/app/build.gradle

I'm not sure if this is an error, or whether Google is still discussing on whether to use version 21 or 23. This would make a significant difference as a minimum API version of 23 would cover ~85% of Android devices, whereas a minimum API version of 21 would cover ~94%.

[tklingbeil]

Google specifies this as follows:

For your app to work on a device, the device must be running Android version 6.0 (API version 23) or higher.

If you have a look at the change log within Google's documentation, it is specified under version 1.3

Updated the minimum supported version from API 21 (Android 5.0) to API 23 (Android
6.0)

[MikeJayDee]

I agree with this, but let's keep an eye on those two issues:
https://github.com/google/exposure-notifications-android/issues/16
https://github.com/DP-3T/dp3t-sdk-android/issues/16