public override void ViewDidLoad()
{
base.ViewDidLoad();
AddBaseLayer(CartoBaseMapStyle.CartoBasemapStyleGray);
string encoded = JsonUtils.GetTorqueQuery();
string url = "http://viz2.cartodb.com/api/v2/sql?q=" + encoded + "&cache_policy=persist";
// Define datasource with the query
HTTPTileDataSource source = new HTTPTileDataSource(0, 14, url);
// Create persistent cache to make it faster
string cacheFile = Utils.GetDocumentDirectory() + "/torque_tile_cache.db";
TileDataSource cacheSource = new PersistentCacheTileDataSource(source, cacheFile);
// Create CartoCSS style from Torque points
CartoCSSStyleSet styleSheet = new CartoCSSStyleSet(JsonUtils.TorqueCartoCSS);
// Create tile decoder and Torque layer
decoder = new TorqueTileDecoder(styleSheet);
tileLayer = new TorqueTileLayer(cacheSource, decoder);
MapView.Layers.Add(tileLayer);
MapView.SetZoom(1, 0);
}
protected override void OnCreate(Android.OS.Bundle savedInstanceState)
{
base.OnCreate(savedInstanceState);
AddBaseLayer(CartoBaseMapStyle.CartoBasemapStyleGray);
string encoded = JsonUtils.GetTorqueQuery();
// Define datasource with the query
string url = "http://viz2.cartodb.com/api/v2/sql?q=" + encoded + "&cache_policy=persist";
HTTPTileDataSource source = new HTTPTileDataSource(0, 14, url);
// Create persistent cache to make it faster
string cacheFile = GetExternalFilesDir(null) + "torque_tile_cache.db";
TileDataSource cacheSource = new PersistentCacheTileDataSource(source, cacheFile);
// Create CartoCSS style from Torque points
CartoCSSStyleSet styleSheet = new CartoCSSStyleSet(JsonUtils.TorqueCartoCSS);
// Create tile decoder and Torque layer
decoder = new TorqueTileDecoder(styleSheet);
tileLayer = new TorqueTileLayer(cacheSource, decoder);
MapView.Layers.Add(tileLayer);
MapView.SetZoom(1, 0);
}
protected override void OnCreate(Android.OS.Bundle savedInstanceState)
{
base.OnCreate(savedInstanceState);
// Initialize hillshading raster data source, better visible in mountain ranges
HTTPTileDataSource hillsRasterTileDataSource = new HTTPTileDataSource(0, 24, HillsideRasterUrl);
// Add persistent caching datasource, tiles will be stored locally on persistent storage
PersistentCacheTileDataSource cachedDataSource =
new PersistentCacheTileDataSource(hillsRasterTileDataSource, GetExternalFilesDir(null) + "/mapcache_hills.db");
// Initialize a raster layer with the previous data source
RasterTileLayer hillshadeLayer = new RasterTileLayer(cachedDataSource);
// Add the previous raster layer to the map
MapView.Layers.Add(hillshadeLayer);
// Animate map to a nice place
MapView.SetFocusPos(BaseProjection.FromWgs84(new MapPos(-122.4323, 37.7582)), 1);
MapView.SetZoom(13, 1);
}
protected virtual TileDataSource CreateTileDataSource()
{
TileDataSource vectorTileDataSource = new CartoOnlineTileDataSource("nutiteq.osm");
// We don't use vectorTileDataSource directly (this would be also option),
// but via caching to cache data locally persistently/non-persistently
// Note that persistent cache requires WRITE_EXTERNAL_STORAGE permission
TileDataSource cacheDataSource = vectorTileDataSource;
if (persistentTileCache)
{
string cacheFile = GetExternalFilesDir(null) + "/mapcache.db";
cacheDataSource = new PersistentCacheTileDataSource(vectorTileDataSource, cacheFile);
}
else
{
cacheDataSource = new MemoryCacheTileDataSource(vectorTileDataSource);
}
return(cacheDataSource);
}
public override void ViewDidLoad()
{
base.ViewDidLoad();
// Initialize hillshading raster data source, better visible in mountain ranges
HTTPTileDataSource tileSource = new HTTPTileDataSource(0, 24, HillsideRasterUrl);
// Add persistent caching datasource, tiles will be stored locally on persistent storage
PersistentCacheTileDataSource cachedSource =
new PersistentCacheTileDataSource(tileSource, Utils.GetDocumentDirectory() + "mapcache_hills.db");
// Initialize a raster layer with the previous data source
RasterTileLayer hillshadeLayer = new RasterTileLayer(cachedSource);
// Add the previous raster layer to the map
MapView.Layers.Add(hillshadeLayer);
// Animate map to a nice place
MapView.SetFocusPos(BaseProjection.FromWgs84(new MapPos(-122.4323, 37.7582)), 1);
MapView.SetZoom(13, 1);
}
