/// <inheritdoc/>
public Task <bool> StopListeningAsync()
{
if (_Listener == null)
{
return(Task.FromResult(true));
}
var providers = Providers;
_Listener.PositionChanged -= OnListenerPositionChanged;
_Listener.PositionError -= OnListenerPositionError;
for (var i = 0; i < providers.Length; ++i)
{
Manager.RemoveUpdates(_Listener);
}
_Listener = null;
return(Task.FromResult(true));
}
/// <inheritdoc/>
public async Task <bool> StartListeningAsync(TimeSpan minTime, double minDistance, bool includeHeading = false, ListenerSettings settings = null)
{
var hasPermission = await CheckPermissions();
if (!hasPermission)
{
return(false);
}
var minTimeMilliseconds = minTime.TotalMilliseconds;
if (minTimeMilliseconds < 0)
{
throw new ArgumentOutOfRangeException(nameof(minTime));
}
if (minDistance < 0)
{
throw new ArgumentOutOfRangeException(nameof(minDistance));
}
if (IsListening)
{
throw new InvalidOperationException("This Geolocator is already listening");
}
var providers = Providers;
_Listener = new GeolocationContinuousListener(Manager, minTime, providers);
_Listener.PositionChanged += OnListenerPositionChanged;
_Listener.PositionError += OnListenerPositionError;
var looper = Looper.MyLooper() ?? Looper.MainLooper;
foreach (var provider in providers)
{
Manager.RequestLocationUpdates(provider, (long)minTimeMilliseconds, (float)minDistance, _Listener, looper);
}
return(true);
}