[Android] Unable to use the library in background

[alle-iacob]

Operation fails when trying to start scan in ForegroundTask due to dependency on Activity.

Proposed solution:

• Remove activity from PermissionsHandler constructor
• Make PermissionsHandler activity aware -> to set activity instance when available (check for null is already present in requestPermissions method)
• Replace requestPermissions with hasPermissions inside _ensureInitialized and throw error if not granted -> let the user request permission when activity available and start scan even if App in background if permissions already granted

Note:
I already have a fix for this but I am not able to push into the repo (patch attached)

universal_ble_background_scan.patch

[fotiDim]

@alle-iacob thanks for the report and the patch. Could you please try #215? It allows to do what you want without introducing breaking changes.

[alle-iacob]

Hi @fotiDim . Thanks a lot for the quick response. I tested and can confirm that it's working.

[fotiDim]

I merged the PR. It will be part of the next release. It should be out by next week.