Tag: map

I work with Google Maps and want to read site objects into the map. I load them from a CSV file and create shelter objects for each location that I store in an ArrayList. To actually add them to the map, I go through this ArrayList and create tag objects with the data of each object. Each actually created marker object is also stored in another ArrayList, so that I can reference it later (show / hide on the map if desired). I feel like I am doing something wrong. I have given the relevant methods below.

private ArrayList shelter objects;
private ArrayList shelter markers;

// Generate the shelter objects from the CSV file and add them to the ArrayList.
private void generateShelterObjects ()
{
shelterObjects = new ArrayList <> ();

Log.i ("SHELTER_TEST", "METHOD generateShelterObjects () STARTED");

InputStream is = getResources (). OpenRawResource (R.raw.shelters_csv_file);
BufferedReader reader = new BufferedReader (
new InputStreamReader (is, Charset.forName ("UTF-8")));
String line = "";

To attempt {
while ((line = reader.readLine ())! = null) {
// Divide the line into different tokens (with the comma as separator).
string[] tokens = line.split (",");

String address = token[0];
double latitude = Double.parseDouble (token[1]);
double longitude = Double.parseDouble (token[2]);
int numberOfOccupants = Integer.parseInt (token[3]);

ShelterObject object = new ShelterObject (address, latitude, longitude, number of participants);
shelterObjects.add (object);

}

} catch (IOException e1) {
Log.e ("MapsActivity2", "Error" + line, e1);
e1.printStackTrace ();
}
Log.i ("SHELTER_TEST", "The size of the array after reading objects:" + shelterObjects.size ());
}

// traverses the ArrayList of Shelter objects and adds a tag to the map with data from that object. The markers are stored in another ArrayList so that they can be referenced later.
private void addShelterMarkersToMap ()
{
shelterMarkers = new ArrayList <> ();

for (ShelterObject obj: shelterObjects) {
LatLng latLng = new LatLng (obj.getLatitude (), obj.getLongitude ());
Marker marker = mMap.addMarker (new MarkerOptions ()
position (latLng)
.title (obj.getAddress ())
.snippet ("Antal platser:" + obj.getNumberOfOccupants ()));
shelterMarkers.add (marker);
}
}