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LocationTracker.cs
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LocationTracker.cs
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using System;
using System.Collections.Generic;
using Android.App;
using Android.Content;
using Android.Locations;
using Android.OS;
using Android.Runtime;
using Xamarin.Forms;
[assembly: Dependency(typeof(Xamarin.FormsBook.Platform.Android.LocationTracker))]
namespace Xamarin.FormsBook.Platform.Android
{
public class LocationTracker : Java.Lang.Object, ILocationTracker, ILocationListener
{
LocationManager locationManager;
public event EventHandler<GeographicLocation> LocationChanged;
public LocationTracker()
{
Activity activity = Toolkit.Activity;
if (activity == null)
throw new InvalidOperationException(
"Must call Toolkit.Init before using LocationProvider");
locationManager =
activity.GetSystemService(Context.LocationService) as LocationManager;
}
// Two methods to implement ILocationProvider (the dependency service interface).
public void StartTracking()
{
IList<string> locationProviders = locationManager.AllProviders;
foreach (string locationProvider in locationProviders)
{
locationManager.RequestLocationUpdates(locationProvider, 1000, 1, this);
}
}
public void PauseTracking()
{
locationManager.RemoveUpdates(this);
}
// Four methods to implement ILocationListener (the Android interface).
public void OnLocationChanged(Location location)
{
LocationChanged?.Invoke(this, new GeographicLocation(location.Latitude,
location.Longitude));
}
public void OnProviderDisabled(string provider)
{
}
public void OnProviderEnabled(string provider)
{
}
public void OnStatusChanged(string provider, [GeneratedEnum] Availability status,
Bundle extras)
{
}
}
}