private List <LatLng> GetPoints(String keyword)
{
Dictionary <string, LatLng> results = new Dictionary <string, LatLng>();
// Calculate four equidistant points around Sydney to use as search centers
// so that four searches can be done.
List <LatLng> searchCenters = new List <LatLng>(4);
for (int heading = 45; heading < 360; heading += 90)
{
searchCenters.Add(SphericalUtil.ComputeOffset(SYDNEY, SEARCH_RADIUS / 2, heading));
}
for (int j = 0; j < 4; j++)
{
var result = GetJsonPlaces(keyword, searchCenters[j]).Result;
try
{
for (int i = 0; i < result.Place.Count; i++)
{
if (!results.ContainsKey(result.Place[i].Id))
{
results.Add(result.Place[i].Id, new LatLng(result.Place[i].Geometry.Location.Latitude, result.Place[i].Geometry.Location.Longitude));
}
}
}
catch (Exception)
{
Toast.MakeText(this, "Cannot process JSON results", ToastLength.Short).Show();
}
}
return(results.Values.ToList());
}
/**
* Makes four radar search requests for the given keyword, then parses the
* json output and returns the search results as a collection of LatLng objects.
*
* @param keyword A string to use as a search term for the radar search
* @return Returns the search results from radar search as a collection
* of LatLng objects.
*/
private List <LatLng> getPoints(string keyword)
{
Dictionary <string, LatLng> results = new Dictionary <string, LatLng>();
// Calculate four equidistant points around Sydney to use as search centers
// so that four searches can be done.
List <LatLng> searchCenters = new List <LatLng>(4);
for (int heading = 45; heading < 360; heading += 90)
{
searchCenters.Add(SphericalUtil.ComputeOffset(SYDNEY, SEARCH_RADIUS / 2, heading));
}
for (int j = 0; j < 4; j++)
{
string jsonResults = getJsonPlaces(keyword, searchCenters[j]);
try
{
// Create a JSON object hierarchy from the results
JSONObject jsonObj = new JSONObject(jsonResults);
JSONArray pointsJsonArray = jsonObj.GetJSONArray("results");
// Extract the Place descriptions from the results
for (int i = 0; i < pointsJsonArray.Length(); i++)
{
if (!results.ContainsKey(pointsJsonArray.GetJSONObject(i).GetString("id")))
{
JSONObject location = pointsJsonArray.GetJSONObject(i)
.GetJSONObject("geometry").GetJSONObject("location");
results.Add(pointsJsonArray.GetJSONObject(i).GetString("id"),
new LatLng(location.GetDouble("lat"),
location.GetDouble("lng")));
}
}
}
catch (JSONException)
{
Toast.MakeText(this, "Cannot process JSON results", ToastLength.Short).Show();
}
}
return(results.Values.ToList());
}