getLocationOneShot

onLocationResult is only called to provide the latest Location result based on the LocationRequest. It is not called if a location could not be provided and during my tests it is not when Location was disabled and GPS was used indoors etc. Please call result.getLastLocation() to get the actual location object.

onLocationAvailablity is always called. locationAvailability.isLocationAvailable() Returns true if the device location is known and reasonably up to date within the hints requested by the active LocationRequests. False is returned when failure to determine location may from a number of causes including disabled location settings or an inability to retrieve sensor data in the device's environment.