Not a member of Pastebin yet?
Sign Up,
it unlocks many cool features!
- public class MapsActivity extends FragmentActivity implements OnMapReadyCallback {
- private GoogleMap mMap;
- ArrayList markerPoints= new ArrayList();
- @Override
- protected void onCreate(Bundle savedInstanceState) {
- super.onCreate(savedInstanceState);
- setContentView(R.layout.activity_maps);
- // Obtain the SupportMapFragment and get notified when the map is ready to be used.
- SupportMapFragment mapFragment = (SupportMapFragment) getSupportFragmentManager()
- .findFragmentById(R.id.map);
- mapFragment.getMapAsync(this);
- }
- @Override
- public void onMapReady(GoogleMap googleMap) {
- mMap = googleMap;
- LatLng sydney = new LatLng(-34, 151);
- //mMap.addMarker(new MarkerOptions().position(sydney).title("Marker in Sydney"));
- mMap.moveCamera(CameraUpdateFactory.newLatLngZoom(sydney, 16));
- mMap.setOnMapClickListener(new GoogleMap.OnMapClickListener() {
- @Override
- public void onMapClick(LatLng latLng) {
- if (markerPoints.size() > 1) {
- markerPoints.clear();
- mMap.clear();
- }
- // Adding new item to the ArrayList
- markerPoints.add(latLng);
- // Creating MarkerOptions
- MarkerOptions options = new MarkerOptions();
- // Setting the position of the marker
- options.position(latLng);
- if (markerPoints.size() == 1) {
- options.icon(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_GREEN));
- } else if (markerPoints.size() == 2) {
- options.icon(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_RED));
- }
- // Add new marker to the Google Map Android API V2
- mMap.addMarker(options);
- // Checks, whether start and end locations are captured
- if (markerPoints.size() >= 2) {
- LatLng origin = (LatLng) markerPoints.get(0);
- LatLng dest = (LatLng) markerPoints.get(1);
- // Getting URL to the Google Directions API
- String url = getDirectionsUrl(origin, dest);
- DownloadTask downloadTask = new DownloadTask();
- // Start downloading json data from Google Directions API
- downloadTask.execute(url);
- }
- }
- });
- }
- private class DownloadTask extends AsyncTask {
- @Override
- protected String doInBackground(String... url) {
- String data = "";
- try {
- data = downloadUrl(url[0]);
- } catch (Exception e) {
- Log.d("Background Task", e.toString());
- }
- return data;
- }
- @Override
- protected void onPostExecute(String result) {
- super.onPostExecute(result);
- ParserTask parserTask = new ParserTask();
- parserTask.execute(result);
- }
- }
- private class ParserTask extends AsyncTask<String, Integer, List<List<HashMap>>> {
- // Parsing the data in non-ui thread
- @Override
- protected List<List<HashMap>> doInBackground(String... jsonData) {
- JSONObject jObject;
- List<List<HashMap>> routes = null;
- try {
- jObject = new JSONObject(jsonData[0]);
- DirectionsJSONParser parser = new DirectionsJSONParser();
- routes = parser.parse(jObject);
- } catch (Exception e) {
- e.printStackTrace();
- }
- return routes;
- }
- @Override
- protected void onPostExecute(List<List<HashMap>> result) {
- ArrayList points = null;
- PolylineOptions lineOptions = null;
- MarkerOptions markerOptions = new MarkerOptions();
- for (int i = 0; i < result.size(); i++) {
- points = new ArrayList();
- lineOptions = new PolylineOptions();
- List<HashMap> path = result.get(i);
- for (int j = 0; j < path.size(); j++) {
- HashMap point = path.get(j);
- double lat = Double.parseDouble(point.get("lat"));
- double lng = Double.parseDouble(point.get("lng"));
- LatLng position = new LatLng(lat, lng);
- points.add(position);
- }
- lineOptions.addAll(points);
- lineOptions.width(12);
- lineOptions.color(Color.RED);
- lineOptions.geodesic(true);
- }
- // Drawing polyline in the Google Map for the i-th route
- mMap.addPolyline(lineOptions);
- }
- }
- private String getDirectionsUrl(LatLng origin, LatLng dest) {
- // Origin of route
- String str_origin = "origin=" + origin.latitude + "," + origin.longitude;
- // Destination of route
- String str_dest = "destination=" + dest.latitude + "," + dest.longitude;
- // Sensor enabled
- String sensor = "sensor=false";
- String mode = "mode=driving";
- // Building the parameters to the web service
- String parameters = str_origin + "&" + str_dest + "&" + sensor + "&" + mode;
- // Output format
- String output = "json";
- // Building the url to the web service
- String url = "https://maps.googleapis.com/maps/api/directions/" + output + "?" + parameters;
- return url;
- }
- private String downloadUrl(String strUrl) throws IOException {
- String data = "";
- InputStream iStream = null;
- HttpURLConnection urlConnection = null;
- try {
- URL url = new URL(strUrl);
- urlConnection = (HttpURLConnection) url.openConnection();
- urlConnection.connect();
- iStream = urlConnection.getInputStream();
- BufferedReader br = new BufferedReader(new InputStreamReader(iStream));
- StringBuffer sb = new StringBuffer();
- String line = "";
- while ((line = br.readLine()) != null) {
- sb.append(line);
- }
- data = sb.toString();
- br.close();
- } catch (Exception e) {
- Log.d("Exception", e.toString());
- } finally {
- iStream.close();
- urlConnection.disconnect();
- }
- return data;
- }
- }
Add Comment
Please, Sign In to add comment