#369: Implemented App Usage observation

[janoliver20]

Other changes:

• Better observation initalization process for less memory usage
• Added a long running observation storage possibility, so data are not sent right away

[iaigner]

just some really minor things and a question - but code LGTM -> and your pipeline does need to be fixed

one open question: is it possible to take the tracking approvement away for one observation or is it similar to how we do with the study consent? can they take the approvement away through the app?

i still need to test the application on my phone

[iaigner]

or is that backStackEntry in the new Wrapper included?

[janoliver20]

That was necessary before the wrapper. This is now handled by the wrapper

[janoliver20]

Tracking consent needs to be able to be declined at any moment, as per Apples rules. But this is the same as any other observation, we cannot do anything if the user decides to remove any sensor permissions for our app, we can only show a warning, but we cannot deny the usage

[iaigner]

.gradlw build didn't work when i checked the branch out for testing purporses

[iaigner]

So i tested the 369 on my android phone. I found following:

• Garmin Connect gives an error that they can't show the login. My VPN was off (because that was the former problem that triggered a similar problem when it's on (see screenshots below)
• you can activate the observation even though garmin is not connected and there is no info that it's not (second thing i think was always like that)
• QR Code Scanner crashes if you want to open it twice in one session (but that's a known bug)
• If you get a simple push notification from an intervention and click on the element with the unread point, it opens the notification screen again visualy
• the output for the app usage is an [object Object]. I think we'd need something more readable here
• (One FE Bug: Simple and Multiple Questions -> you can't write into the Input fields anymore)

Screenshots:

App:

Output:

[janoliver20]

So i tested the 369 on my android phone. I found following:

• Garmin Connect gives an error that they can't show the login. My VPN was off (because that was the former problem that triggered a similar problem when it's on (see screenshots below)
• you can activate the observation even though garmin is not connected and there is no info that it's not (second thing i think was always like that)
• QR Code Scanner crashes if you want to open it twice in one session (but that's a known bug)
• If you get a simple push notification from an intervention and click on the element with the unread point, it opens the notification screen again visualy
• the output for the app usage is an [object Object]. I think we'd need something more readable here
• (One FE Bug: Simple and Multiple Questions -> you can't write into the Input fields anymore)

• Garmin cannot work, as there is no Garmin Connect connected in More, so that works as expected.
• QR Code scanner is an old bug and not worth fixing for now
• The output in the FE is as expected, as it only lists simple types and not objects

[iaigner]

test results on android:

• app was open and i change the study status to paused and then to active -> it didn't got the active state but with the "neu laden" button it worked
• i removed the garmin observations in the paused study and my app did show the error screen for garmin nontheless (but only once, maybe it just needed time to adjust)
• ACC was not tracked -> i had it on not hidden before pausing, where i didn't start it, but when i changed it to hidden and restarted the app, it still didn't collect data
• GPS test with timestamp stop -> i set it on 15:50 but it kept collecting data
• GPS permission removed -> i removed the permission in the phone settings and it stopped (though the app shows it as running still)

@janoliver20

[iaigner]

LGTM - when you have fixed the problem with the id for the app usage, you are good to go