public async Task Start()
{
_cts = new CancellationTokenSource();
_taskId = UIApplication.SharedApplication.BeginBackgroundTask("LongRunningTask", OnExpiration);
try
{
//INVOKE THE SHARED CODE
var backgroundTask = new BackgroundService();
await backgroundTask.RunBackgroundTask(_cts.Token);
}
catch (OperationCanceledException)
{
}
finally
{
if (_cts.IsCancellationRequested)
{
var message = new CancelMessage();
Device.BeginInvokeOnMainThread(
() => MessagingCenter.Send(message, "CancelledMessage")
);
}
}
UIApplication.SharedApplication.EndBackgroundTask(_taskId);
}
public override StartCommandResult OnStartCommand(Intent intent, StartCommandFlags flags, int startId)
{
_cts = new CancellationTokenSource();
Task.Run(() =>
{
try
{
//INVOKE THE SHARED CODE
var backgroundTask = new BackgroundService();
backgroundTask.RunBackgroundTask(_cts.Token).Wait();
}
catch (Android.OS.OperationCanceledException)
{
}
finally
{
if (_cts.IsCancellationRequested)
{
var message = new CancelMessage();
Device.BeginInvokeOnMainThread(
() => MessagingCenter.Send(message, "CancelledMessage")
);
}
}
}, _cts.Token);
return(StartCommandResult.Sticky);
}