Android Open Source - Mero-Bhada-Meter Offline Route

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License

The source code is released under:
GNU General Public License
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Java Source Code

package com.nirab.merobhadameter;
//  w ww .j a  va2 s  .co m
import java.util.ArrayList;
import java.util.List;

import org.mapsforge.core.model.LatLong;

import android.os.Environment;
import android.util.Log;

import com.graphhopper.GHRequest;
import com.graphhopper.GHResponse;
import com.graphhopper.GraphHopper;
import com.graphhopper.util.PointList;

public class OfflineRoute {

  private LatLong startPoint, stopPoint;
  private List<LatLong> viaPoints;
  private Double roadLength;

  public OfflineRoute(LatLong start, LatLong stop, List<LatLong> via) {
    startPoint = start;
    stopPoint = stop;
    viaPoints = via;
    roadLength = 0.0;
  }

  public List<LatLong> getRoute() {
    List<LatLong> road = new ArrayList<LatLong>();
    GraphHopper gh = new GraphHopper().forMobile();
    gh.setCHShortcuts(true, true);
    gh.load(Environment.getExternalStorageDirectory()
        + "/merobhadameter/maps/kathmandu-gh/");

    if (viaPoints.isEmpty()) {

      GHRequest request = new GHRequest(startPoint.latitude,
          startPoint.longitude, stopPoint.latitude,
          stopPoint.longitude);
      request.setAlgorithm("dijkstrabi");
      GHResponse response = gh.route(request);
      String gh_value = String.valueOf(response);
      Log.i("What GraphHopper API Response", gh_value);

      int points = response.getPoints().getSize();
      PointList tmp = response.getPoints();
      for (int i = 0; i < points; i++) {
        road.add(new LatLong(tmp.getLatitude(i), tmp.getLongitude(i)));
      }
      Log.i("Latlong after gh calculation", String.valueOf(road));
      roadLength = roadLength + response.getDistance();

    }

    else {

      for (int i = 0; i < viaPoints.size(); i++) {

        GHRequest request;

        if (i == 0) {
          

          request = new GHRequest(startPoint.latitude,
              startPoint.longitude, viaPoints.get(0).latitude,
              viaPoints.get(0).longitude);
          request.setAlgorithm("dijkstrabi");
          GHResponse response = gh.route(request);
          String gh_value = String.valueOf(response);
          Log.i("What GraphHopper API Response", gh_value);

          int points = response.getPoints().getSize();
          PointList tmp = response.getPoints();
          for (int j = 0; j < points; j++) {
            road.add(new LatLong(tmp.getLatitude(i), tmp
                .getLongitude(i)));
          }
          Log.i("Latlong after gh calculation", String.valueOf(road));
          roadLength = roadLength + response.getDistance();
        }

        if (i > 0 && i <= viaPoints.size() - 1) {

          

          request = new GHRequest(viaPoints.get(i - 1).latitude,
              viaPoints.get(i - 1).longitude,
              viaPoints.get(i).latitude,
              viaPoints.get(i).longitude);

          request.setAlgorithm("dijkstrabi");
          GHResponse response = gh.route(request);
          String gh_value = String.valueOf(response);
          Log.i("What GraphHopper API Response", gh_value);

          int points = response.getPoints().getSize();
          PointList tmp = response.getPoints();
          for (int j = 0; j < points; j++) {
            road.add(new LatLong(tmp.getLatitude(i), tmp
                .getLongitude(i)));
          }
          Log.i("Latlong after gh calculation", String.valueOf(road));
          roadLength = roadLength + response.getDistance();

        }

        if (i == (viaPoints.size() - 1)) {
          

          request = new GHRequest(
              viaPoints.get(viaPoints.size() - 1).latitude,
              viaPoints.get(viaPoints.size() - 1).longitude,
              stopPoint.latitude, stopPoint.longitude);
          request.setAlgorithm("dijkstrabi");
          GHResponse response = gh.route(request);
          String gh_value = String.valueOf(response);
          Log.i("What GraphHopper API Response", gh_value);

          int points = response.getPoints().getSize();
          PointList tmp = response.getPoints();
          for (int j = 0; j < points; j++) {
            road.add(new LatLong(tmp.getLatitude(i), tmp
                .getLongitude(i)));
          }
          Log.i("Latlong after gh calculation", String.valueOf(road));
          roadLength = roadLength + response.getDistance();

        }

      }

    }

    return road;

  }

  public Double getRoadLengthInKm() {
    return roadLength / 1000;
  }

}
Java Source Code List
