Dosen't work on deGoogled Android

[thereallinusrg]

I run LineageOS without Google Services. The application reports, that it needs updated Google Play Sevices to run, which I will not install, since they are closed source and proprietary software.

[zukunft]

Several others have a similar issue: #51

[dbrgn]

The Google Exposure Notification API (https://www.google.com/covid19/exposurenotifications/) is being distributed through Google Play Services. A device without Play Services will not have this API.

The alternative would mean that the app would constantly need to send BLE advertisement frames and listen for incoming BLE advertisement frames. This would be a big battery drain. Furthermore, since apps only have access to a high-level API, it's not possible to have the same level of control over the beacons being sent and received.

I am not involved in DP-3T (but I do work as an Android developer and have some BLE experience), but I do not see how this could be reliably implemented on application level (as opposed to OS level).

[zukunft]

@dbrgn I had installed a previous version of the App without Google Exposure Notification API and the battery drain was around 6%. This would be acceptable for me, but I guess the bigger issue is the contact key synchronization on the backend server.

[zukunft]

For the German App an alternative Backend synchronization has been requested: corona-warn-app/cwa-documentation#169 . Probably a similar setup could be used for Swiss App.

[zukunft]

Looks like Google has published the code of the API: https://github.com/google/exposure-notifications-internals

[simonroesch]

This repository contains snippets of code that show how the Exposure Notifications API works inside the Google Play services layer.

Unfortunately, this is not a complete solution that you can use as alternative on devices without PlayServices. But it helps very much in understanding what is done by the PlayServices and helps a lot for building an independent solution on app level as discussed in DP-3T/dp3t-sdk-android#10

[zukunft]

Maybe coralibre.de / https://github.com/CoraLibre/CoraLibre-android-sdk can be used as a base.

[lbort]

Micro-G released a open implementation of the google Exposure notification framework. I used this with a de-googled version of lineage. It looked as it works, swisscovid as well as the german CoronaWarnApp were happy, and gave some statistical info, saying IDs are collected. I cannot confirm the notification process worked, since I was not shown any dangerous contacts, neither was I tested positive, so I couldn't publish my keys.

However, since the last update of swisscovid (version 1.2.0, released 28.10.2020), this setup with microG's framework stopped to work. Now it displays error "keine aktuellen Daten", RTSENLOST.

What exactely was changed from the previous version to 1.2.0? It seems not to be a problem with the Bluetooth stuff, but rather with the download of infected keys... Is it possible to make this work again? Many people with de-googled phones run microG, and this would be a fix for this issue.

[tobru]

Please have a look at #249 and therefore also at microg/GmsCore#1258 (comment) which will explain what happened and what can be done.

[v3DJG6GL]

With the fix 4c2ef04 and the release of microG GmsCore v0.2.14.204215, SwissCovid version 1.2.0 should work again.