Show routes between multiple points on Google Maps

Question

I\'ve created my own custom map to show my current location and multiple points on map. it works fine,but now i would like to show a route from my current location to every

Answer 1

i found a simpler solution.I can use google maps intent directly, and i don't need to create a custom map activity anymore:

if(DataSources.ActivitiesList.length >0)
{
  String address = "http://maps.google.com/maps?daddr=" +    DataSources.ActivitiesList[0].SiteLatitude.toString() + "," + DataSources.ActivitiesList[0].SiteLongitude.toString();
for (int i= 1 ;i <  DataSources.ActivitiesList.length ; i++) 
{
    if(DataSources.ActivitiesList[i].SiteLatitude != null)
        address += "+to:" + DataSources.ActivitiesList[i].SiteLatitude + "," + DataSources.ActivitiesList[i].SiteLongitude;
}
Intent intent = new Intent(android.content.Intent.ACTION_VIEW, Uri.parse(address));
    startActivity(intent);
    break;      
}

Answer 2

This link have tutorial to draw route path on map in our app. this may help you and use below to link with map app... this will take to you in google map application

String uri = "http://maps.google.com/maps?f=d&hl=en&saddr="+source_latitude+","+source_longitude+"&daddr="+destination_latitude+","+destination_longitude;
Intent intent = new Intent(android.content.Intent.ACTION_VIEW, Uri.parse(uri));
intent.setClassName("com.google.android.apps.maps", "com.google.android.maps.MapsActivity");
startActivity(intent);

OR

refter this link how to display the driving routes

Answer 3

package org.ci.geo.route.android;

import java.io.IOException;
import java.io.InputStream;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLConnection;
import java.util.ArrayList;
import java.util.List;

import org.ci.geo.route.Road;
import org.ci.geo.route.RoadProvider;

import android.graphics.Bitmap;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.Point;
import android.graphics.Bitmap.Config;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.widget.LinearLayout;
import android.widget.TextView;

import com.google.android.maps.GeoPoint;
import com.google.android.maps.MapActivity;
import com.google.android.maps.MapController;
import com.google.android.maps.MapView;
import com.google.android.maps.Overlay;

public class MapRouteActivity extends MapActivity {

        LinearLayout linearLayout;
        MapView mapView;
        private Road mRoad;

        @Override
        public void onCreate(Bundle savedInstanceState) {
                super.onCreate(savedInstanceState);
                setContentView(R.layout.main);
                mapView = (MapView) findViewById(R.id.mapview);
                mapView.setBuiltInZoomControls(true);

                new Thread() {
                        @Override
                        public void run() {
                                double fromLat = 49.85, fromLon = 24.016667, toLat = 50.45, toLon = 30.523333;
                                String url = RoadProvider
                                                .getUrl(fromLat, fromLon, toLat, toLon);
                                InputStream is = getConnection(url);
                                mRoad = RoadProvider.getRoute(is);
                                mHandler.sendEmptyMessage(0);
                        }
                }.start();
        }

        Handler mHandler = new Handler() {
                public void handleMessage(android.os.Message msg) {
                        TextView textView = (TextView) findViewById(R.id.description);
                        textView.setText(mRoad.mName + " " + mRoad.mDescription);
                        MapOverlay mapOverlay = new MapOverlay(mRoad, mapView);
                        List<Overlay> listOfOverlays = mapView.getOverlays();
                        listOfOverlays.clear();
                        listOfOverlays.add(mapOverlay);
                        mapView.invalidate();
                };
        };

        private InputStream getConnection(String url) {
                InputStream is = null;
                try {
                        URLConnection conn = new URL(url).openConnection();
                        is = conn.getInputStream();
                } catch (MalformedURLException e) {
                        e.printStackTrace();
                } catch (IOException e) {
                        e.printStackTrace();
                }
                return is;
        }

        @Override
        protected boolean isRouteDisplayed() {
                return false;
        }
}

class MapOverlay extends com.google.android.maps.Overlay {
        Road mRoad;
        ArrayList<GeoPoint> mPoints;

        public MapOverlay(Road road, MapView mv) {
                mRoad = road;
                if (road.mRoute.length > 0) {
                        mPoints = new ArrayList<GeoPoint>();
                        for (int i = 0; i < road.mRoute.length; i++) {
                                mPoints.add(new GeoPoint((int) (road.mRoute[i][1] * 1000000),
                                                (int) (road.mRoute[i][0] * 1000000)));
                        }
                        int moveToLat = (mPoints.get(0).getLatitudeE6() + (mPoints.get(
                                        mPoints.size() - 1).getLatitudeE6() - mPoints.get(0)
                                        .getLatitudeE6()) / 2);
                        int moveToLong = (mPoints.get(0).getLongitudeE6() + (mPoints.get(
                                        mPoints.size() - 1).getLongitudeE6() - mPoints.get(0)
                                        .getLongitudeE6()) / 2);
                        GeoPoint moveTo = new GeoPoint(moveToLat, moveToLong);

                        MapController mapController = mv.getController();
                        mapController.animateTo(moveTo);
                        mapController.setZoom(7);
                }
        }

        @Override
        public boolean draw(Canvas canvas, MapView mv, boolean shadow, long when) {
                super.draw(canvas, mv, shadow);
                drawPath(mv, canvas);
                return true;
        }

        public void drawPath(MapView mv, Canvas canvas) {
                int x1 = -1, y1 = -1, x2 = -1, y2 = -1;
                Paint paint = new Paint();
                paint.setColor(Color.GREEN);
                paint.setStyle(Paint.Style.STROKE);
                paint.setStrokeWidth(3);
                for (int i = 0; i < mPoints.size(); i++) {
                        Point point = new Point();
                        mv.getProjection().toPixels(mPoints.get(i), point);
                        x2 = point.x;
                        y2 = point.y;
                        if (i > 0) {
                                canvas.drawLine(x1, y1, x2, y2, paint);
                        }
                        x1 = x2;
                        y1 = y2;
                }
        }
}


http://code.google.com/p/j2memaprouteprovider/source/browse/trunk/J2MEMapRouteAndroidEx/src/org/ci/geo/route/android/MapRouteActivity.java