Creating GeoJsonSource out of UI Thread raises exception

[milo1000]

Creating instance of GeoJsonSource class outside of UI Thread raises
com.mapbox.mapboxsdk.exceptions.CalledFromWorkerThreadException

Since it has nothing to do with UI itself nor View/Layer instance, and parsing GeoJson can be time consuming, this shall be considered bad design.

Android versions: 8.1
Device models: Nokia 7+
Mapbox SDK versions: 6.2.1

[tobrun]

parse GeoJson on workerthread
pass that result to the main thread and create source from it

[milo1000]

parse GeoJson on workerthread

That's not the point of this issue. I don't parse GeoJSON by myself, just create GeoJsonSource from GeoJSON string like this:

GeoJsonSource geoJsonSource = new GeoJsonSource(OVERLAY_SOURCE_ID, overlaySource);

Since my overlaySource can be huge, such operation seems to be heavyweight and it's strange to do such operation within UI thread.

[tobrun]

tracking optimisations to this feature in #8484