Android 13 Exact Location not working

[lukikoli]

Hey, when I try to use this Crossgeolocator library with Android 13, the GPS Signal moves a lot, even though the device doesnt move. When I try it with Android 11 or so, it works just fine

[gktval]

What phones are these tested on? There are not any conditional statements between Android 11/13, so I doubt this is a bug with the code. Just a quick Google search, there are other people that have had previous issues with GPS on Android 13. You could also test other apps to see if you notice a difference as well.

[lukikoli]

Hi, I tested it on a virtualized Google Pixel 5 Android 13. I googled the problem online and there are many other people, that have the same problem that I have. I couldn't find any solution. That's why I need your help. Thanks

[gktval]

I not sure what you have tried already. It could be that the almanac need redownloaded. This can happen by letting the gps sit for about 10-15 minutes to acquire satellites. https://www.reddit.com/r/GooglePixel/comments/wt3tms/gps_problem_with_a13_update_on_pixel_5/

[lukikoli]

Hi, I just tested my app on Android 13, there it's working fine. Allthough, the location still glitches arround in a distance of like 15 meters. I want to track the location and display the route on a track so this is a big problem

[lukikoli]

I implemented the Code as follows: I have a foreground service that starts subscribing to the CrossGeolocator PosChanged event. (Can I even implement it like that on Android?)

My Code:

`public async void OnServiceStarted()
{

        //REGISTER GPS Service CrossGeolocator
        try
        {
            if (CrossGeolocator.Current.IsListening)
                return;

            
            await CrossGeolocator.Current.StartListeningAsync(TimeSpan.FromSeconds(2), 10, true, new GeolocatorPlugin.Abstractions.ListenerSettings
            {
                ActivityType = GeolocatorPlugin.Abstractions.ActivityType.AutomotiveNavigation,
                AllowBackgroundUpdates = true,
                DeferLocationUpdates = true,
                DeferralDistanceMeters = 10,
                DeferralTime = TimeSpan.FromSeconds(2),
                ListenForSignificantChanges = true,
                PauseLocationUpdatesAutomatically = false
            });



            CrossGeolocator.Current.PositionChanged += PosChanged;
            CrossGeolocator.Current.PositionError += PosError;
        }
        catch(Exception e) {
            System.Diagnostics.Debug.WriteLine("Service NOT RUNNING ANYMORE " + e);
        }
        
    }`

Then if the position changes, I will just save these values in an array of Locations.

[gktval]

That should work. I added a Sample project. You can double check with it if you run into problems.
https://github.com/gktval/Maui-GeolocatorPlugin/tree/main/Sample

Allthough, the location still glitches arround in a distance of like 15 meters.

Check your horizontal accuracy. A good accuracy for a phone GPS should be less than 10. Otherwise, also check if you are around tall buildings or trees as this will affect the accuracy.

An alternative solution is to create a circular list that takes a weighted running average of the last 5 points or so. Other options include Kalman Filters or kicking out bad data.

[NishiokaTakeo]

Me same issue here. 1 of 5 locations changed arguments is San Francisco which far away from current location.

Also PositionChanged event fires to many times.

Confirmed build in Geolocation class works as expected.

[AhmedAdelGadElkareeem]

I use this code

var status = await Permissions.RequestAsync<Permissions.LocationWhenInUse>();
if (status == PermissionStatus.Granted && !CrossGeolocator.Current.IsListening)
{
if (await CrossGeolocator.Current.StartListeningAsync(
minimumTime: TimeSpan.FromSeconds(60),
minimumDistance: 100,
true,
new ListenerSettings
{
ActivityType = ActivityType.Other,
AllowBackgroundUpdates = true,
DeferLocationUpdates = true,
ListenForSignificantChanges = true,
PauseLocationUpdatesAutomatically = false,
DeferralDistanceMeters = 10,
DeferralTime = TimeSpan.FromSeconds(5),
}))
{
CrossGeolocator.Current.PositionChanged += CrossGeolocator_Current_PositionChanged;
CrossGeolocator.Current.PositionError += CrossGeolocator_Current_PositionError;
}
}

private static async void CrossGeolocator_Current_PositionChanged(object sender, PositionEventArgs e)
{
try
{
await BaseService.AddNewAttendanceLocationTracking(new AttendanceLocationTrackingModel()
{
AttendanceId = AttendanceId,
UserId = long.Parse(Settings.UserId),
Latitude = e.Position.Latitude,
Longitude = e.Position.Longitude,
});
}

PositionChanged event fires to many times and return same latitude and longitude althougth i am don't move ??

is there any soultion for this issue

[AhmedAdelGadElkareeem]

i use this solution and working fine now
PositionChanged only fire if latitude and longitude changed

private static async void CrossGeolocator_Current_PositionChanged(object sender, PositionEventArgs e)
{
var currentPosition = e.Position;

// Check if the position has significantly changed
if (_lastPosition != null && 
    Math.Abs(_lastPosition.Latitude - currentPosition.Latitude) < 0.0001 &&
    Math.Abs(_lastPosition.Longitude - currentPosition.Longitude) < 0.0001)
{
    // Positions are nearly the same; ignore this update
    return;
}

_lastPosition = currentPosition;

try
{
    await BaseService.AddNewAttendanceLocationTracking(new AttendanceLocationTrackingModel()
    {
        AttendanceId = AttendanceId,
        UserId = long.Parse(Settings.UserId),
        Latitude = currentPosition.Latitude,
        Longitude = currentPosition.Longitude,
    });
}
catch (Exception ex)
{
    // Handle exceptions
}

}