public override bool OnStartJob(JobParameters @params)
{
_reschedule = true;
_downloadTask = Task.Run(async() =>
{
Debug.WriteLine("FETCH");
try
{
bool success = await WeatherDataFetcher.UpdateWeatherForecastDbAsync();
if (!success)
{
Debug.WriteLine("No new Data was fetched during background task");
_reschedule = true;
}
Debug.WriteLine("Background fetching SUCCESS");
_reschedule = false;
}
catch (Exception e)
{
Debug.WriteLine("Error occured during background fetching: " + e.StackTrace);
_reschedule = true;
}
Debug.WriteLine("Job finished @ " + DateTime.Now);
JobFinished(@params, false);
if (Build.VERSION.SdkInt >= BuildVersionCodes.N)
{
Util.ScheduleJob(this);
}
});
Debug.WriteLine("Service running @ " + DateTime.Now);
return(true);
}
public override void PerformFetch(UIApplication app, Action <UIBackgroundFetchResult> completionHandler)
{
Debug.WriteLine("FETCH");
try
{
bool success = WeatherDataFetcher.UpdateWeatherForecastDbAsync().Result;
if (!success)
{
completionHandler(UIBackgroundFetchResult.NoData);
}
completionHandler(UIBackgroundFetchResult.NewData);
}
catch (Exception e)
{
Debug.WriteLine("Error occured during Background Fetching: " + e.StackTrace);
}
}
public MainPage(int id)
{
_mId = id;
InitializeComponent();
Options.IsEnabled = DependencyService.Get <ISettingsService>().SettingsDialogueAvailable;
DependencyService.Get <ISettingsService>().PropertyChanged += (sender, e) =>
{
DemoList.BeginRefresh();
DemoList.RefreshCommand.Execute(DemoList);
DemoList.EndRefresh();
};
if (WeatherDataFetcher.LastUpDate.Date <= DateTime.Now.AddDays(-2)) //is this how you use async things???
{
WeatherDataFetcher.UpdateWeatherForecastDbAsync();
}
}