// The project requires the Google Glass Component from
// https://components.xamarin.com/view/googleglass
// so make sure you add that in to compile succesfully.
protected override async void OnCreate(Bundle bundle)
{
base.OnCreate(bundle);
// Show loading screen
SetContentView(Resource.Layout.LoadingScreen);
var loadingText = FindViewById <TextView> (Resource.Id.loading_text);
loadingText.SetText(Resource.String.getting_departures); // set loading text
var progressBar = FindViewById <SliderView> (Resource.Id.indeterm_slider);
progressBar.StartIndeterminate(); // start indeterminate progress bar
// get station ID from intent
int intentStationId = int.Parse(Intent.GetStringExtra("stationId"));
// try to call PTV API to get station departures
List <Departure> stationDepartures;
try{
var ptvApi = new PtvApi();
stationDepartures = await ptvApi.StationDepartures(intentStationId, TransportType.Train, 1);
}catch (Exception e) {
// show error card
var errorCard = new Card(this);
errorCard.SetText(e.ToString());
SetContentView(errorCard.View);
return;
}
// if there are no departures, show no departure message
if (stationDepartures.Count == 0)
{
// Show error screen
SetContentView(Resource.Layout.ErrorScreen);
var errorText = FindViewById <TextView> (Resource.Id.error_text);
errorText.SetText(Resource.String.no_upcoming_departures); // set error text
return;
}
// show departures list screen
ListView listView;
SetContentView(Resource.Layout.DepartureScreen);
listView = FindViewById <ListView> (Resource.Id.listview);
listView.Adapter = new TrainsScreenAdapter(this, stationDepartures); // bind list of station departures to listView
listView.RequestFocus(); // set focus on the listView so scrolling works on the list
}
public async void NearbyDepartures(Location location)
{
var ptvApi = new PtvApi(); // new PTV API service
// Show loading screen
SetContentView(Resource.Layout.LoadingScreen);
var loadingText = FindViewById <TextView>(Resource.Id.loading_text);
loadingText.SetText(Resource.String.getting_stopsnearyou); // set loading text
var progressBar = FindViewById <SliderView>(Resource.Id.indeterm_slider);
progressBar.StartIndeterminate(); // start indeterminate progress bar
// try to call PTV API to get nearby stops
List <Stop> stopsNearby;
try
{
stopsNearby = await ptvApi.StopsNearby(location.Latitude, location.Longitude);
}
catch (Exception e)
{
// show error card
var errorCard = new Card(this);
errorCard.SetText(e.ToString());
SetContentView(errorCard.View);
return;
}
// depending on our mode of transport, we want different number of stops and error messages
int stopLimit = 1;
int noStopsNearby = Resource.String.no_stops_nearby;
switch (transportType)
{
case TransportType.Bus:
stopLimit = 6;
noStopsNearby = Resource.String.no_bus_stops_nearby;
break;
case TransportType.Tram:
stopLimit = 6;
noStopsNearby = Resource.String.no_tram_stops_nearby;
break;
case TransportType.Train:
stopLimit = 1;
noStopsNearby = Resource.String.no_train_stops_nearby;
break;
}
// Cull our stops nearby to just how many we want
stopsNearby = stopsNearby.Where(x =>
x.TransportType == transportType
).Take(stopLimit).ToList();
// if there are no stops nearby, show no stops message
if (stopsNearby.Count == 0)
{
// Show error screen
SetContentView(Resource.Layout.ErrorScreen);
var errorText = FindViewById <TextView>(Resource.Id.error_text);
errorText.SetText(noStopsNearby); // set error text
return;
}
// Update loading text
loadingText.SetText(Resource.String.getting_departures);
// Get departures for each stop
List <Departure> nearByDepartures = new List <Departure>();
foreach (Stop stop in stopsNearby)
{
nearByDepartures.AddRange(await ptvApi.StationDepartures(stop.StopID, transportType, 1)); // merge departures together
}
// if there are no departures, show no departure message
if (nearByDepartures.Count == 0)
{
var noDeparturesCard = new Card(this);
noDeparturesCard.SetText(Resource.String.no_upcoming_departures);
SetContentView(noDeparturesCard.View);
return;
}
// show departures list screen
SetContentView(Resource.Layout.DepartureScreen);
headListView = FindViewById <HeadListView>(Resource.Id.listview);
// get the right type of screen adapter for the right type of transport
if (transportType == TransportType.Train)
{
// we don't need the train "number" for nearby trains
headListView.Adapter = new NearbyTrainScreenAdapter(this, nearByDepartures); // bind list of station departures to listView
}
else
{
headListView.Adapter = new NearbyBusTramScreenAdapter(this, nearByDepartures); // bind list of station departures to listView
}
headListView.activate();
}