how to make driving route from my location to any markers

Question

I am a beginner in programming. I get a tutorial driving route from my location to the destination. but these tutorials are not exactly what I wanted.

link tutorials: http://wptrafficanalyzer.in/blog/driving-route-from-my-location-to-destination-in-google-maps-android-api-v2/

the question is how do I get a driving route from my location to my custom marker.

GoogleMap map;
ArrayList<LatLng> mMarkerPoints;
double mLatitude=0;
double mLongitude=0;
TextView tvDistanceDuration;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.maps);

    tvDistanceDuration = (TextView) findViewById(R.id.tv_distance_time);
    // Getting Google Play availability status
    int status = GooglePlayServicesUtil.isGooglePlayServicesAvailable(getBaseContext());

    if(status!=ConnectionResult.SUCCESS){ // Google Play Services are not available

        int requestCode = 10;
        Dialog dialog = GooglePlayServicesUtil.getErrorDialog(status, this, requestCode);
        dialog.show();

    }else { // Google Play Services are available

        // Initializing
        mMarkerPoints = new ArrayList<LatLng>();

        // Getting reference to SupportMapFragment of the activity_main
        SupportMapFragment fm = (SupportMapFragment)getSupportFragmentManager().findFragmentById(R.id.map);

        // Getting Map for the SupportMapFragment
        map = fm.getMap();

        // Enable MyLocation Button in the Map
        map.setMyLocationEnabled(true);

        // Getting LocationManager object from System Service LOCATION_SERVICE
        LocationManager locationManager = (LocationManager) getSystemService(LOCATION_SERVICE);

        // Creating a criteria object to retrieve provider
        Criteria criteria = new Criteria();

        // Getting the name of the best provider
        String provider = locationManager.getBestProvider(criteria, true);

        // Getting Current Location From GPS
        Location location = locationManager.getLastKnownLocation(provider);

        if(location!=null){
            onLocationChanged(location);
        }

        locationManager.requestLocationUpdates(provider, 20000, 0, this);

        // Setting onclick event listener for the map
        map.setOnMapClickListener(new OnMapClickListener() {

            @Override
            public void onMapClick(LatLng point) {

                // Already map contain destination location
                if(mMarkerPoints.size()>=1){

                    FragmentManager fm = getSupportFragmentManager();
                    mMarkerPoints.clear();
                    map.clear();
                    LatLng startPoint = new LatLng(mLatitude, mLongitude);

                    // draw the marker at the current position
                    drawMarker(startPoint);
                }

                // draws the marker at the currently touched location
                drawMarker(mMarkerPoints.get(1));

                // Checks, whether start and end locations are captured
                if(mMarkerPoints.size() >= 1){
                    LatLng origin = mMarkerPoints.get(0);
                    LatLng dest = mMarkerPoints.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 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";

    // Building the parameters to the web service
    String parameters = str_origin+"&"+str_dest+"&"+sensor;

    // 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;
}

/** A method to download json data from url */
private String downloadUrl(String strUrl) throws IOException{
    String data = "";
    InputStream iStream = null;
    HttpURLConnection urlConnection = null;
    try{
        URL url = new URL(strUrl);

        // Creating an http connection to communicate with url
        urlConnection = (HttpURLConnection) url.openConnection();

        // Connecting to url
        urlConnection.connect();

        // Reading data from url
        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 while downloading url", e.toString());
    }finally{
        iStream.close();
        urlConnection.disconnect();
    }
    return data;
}

/** A class to download data from Google Directions URL */
private class DownloadTask extends AsyncTask<String, Void, String>{

    // Downloading data in non-ui thread
    @Override
    protected String doInBackground(String... url) {

        // For storing data from web service
        String data = "";

        try{
            // Fetching the data from web service
            data = downloadUrl(url[0]);
        }catch(Exception e){
            Log.d("Background Task",e.toString());
        }
        return data;
    }

    // Executes in UI thread, after the execution of
    // doInBackground()
    @Override
    protected void onPostExecute(String result) {
        super.onPostExecute(result);

        ParserTask parserTask = new ParserTask();

        // Invokes the thread for parsing the JSON data
        parserTask.execute(result);
    }
}

/** A class to parse the Google Directions in JSON format */
private class ParserTask extends AsyncTask<String, Integer, List<List<HashMap<String,String>>> >{

    // Parsing the data in non-ui thread
    @Override
    protected List<List<HashMap<String, String>>> doInBackground(String... jsonData) {

        JSONObject jObject;
        List<List<HashMap<String, String>>> routes = null;

        try{
            jObject = new JSONObject(jsonData[0]);
            DirectionsJSONParser parser = new DirectionsJSONParser();

            // Starts parsing data
            routes = parser.parse(jObject);
        }catch(Exception e){
            e.printStackTrace();
        }
        return routes;
    }

    // Executes in UI thread, after the parsing process
    @Override
    protected void onPostExecute(List<List<HashMap<String, String>>> result) {
        ArrayList<LatLng> points = null;
        PolylineOptions lineOptions = null;
        MarkerOptions markerOptions = new MarkerOptions();
        String distance = "";
        String duration = "";

        if(result.size()<1){
            Toast.makeText(getBaseContext(), "No Points", Toast.LENGTH_SHORT).show();
            return;
        }

        // Traversing through all the routes
        for(int i=0;i<result.size();i++){
            points = new ArrayList<LatLng>();
            lineOptions = new PolylineOptions();

            // Fetching i-th route
            List<HashMap<String, String>> path = result.get(i);

            // Fetching all the points in i-th route
            for(int j=0;j<path.size();j++){
                HashMap<String,String> point = path.get(j);

                if(j==0){    // Get distance from the list
                    distance = (String)point.get("distance");
                    continue;
                }else if(j==1){ // Get duration from the list
                    duration = (String)point.get("duration");
                    continue;
                }

                double lat = Double.parseDouble(point.get("lat"));
                double lng = Double.parseDouble(point.get("lng"));
                LatLng position = new LatLng(lat, lng);

                points.add(position);
            }

            // Adding all the points in the route to LineOptions
            lineOptions.addAll(points);
            lineOptions.width(2);
            lineOptions.color(Color.RED);
        }

        tvDistanceDuration.setText("Distance:"+distance + ", Duration:"+duration);

        // Drawing polyline in the Google Map for the i-th route
        map.addPolyline(lineOptions);
    }
}


@Override
public boolean onCreateOptionsMenu(Menu menu) {
    // Inflate the menu; this adds items to the action bar if it is present.
    getMenuInflater().inflate(R.menu.main, menu);
    return true;
}

private void drawMarker(LatLng point){
    mMarkerPoints.add(point);

    // Creating MarkerOptions
    MarkerOptions options = new MarkerOptions();

    // Setting the position of the marker
    options.position(point);

    /**
    * For the start location, the color of marker is GREEN and
    * for the end location, the color of marker is RED.
    */

    map.addMarker(new MarkerOptions()
    .icon(BitmapDescriptorFactory.fromResource(R.drawable.marker))
    .anchor(0.0f, 1.0f) // Anchors the marker on the bottom left
    .position(new LatLng(-6.381407, 106.855766))
    .title("PT. Andalan Sumber Rezeki").snippet("Jln. Ir. H. Juanda, Kp. Bojong RT. 03/06 Kel. Batik Jaya <br/> Kec. Sukma Jaya DEPOK <br/> Phone : 0813 814 77771"));

    map.addMarker(new MarkerOptions()
    .icon(BitmapDescriptorFactory.fromResource(R.drawable.marker))
    .anchor(0.0f, 1.0f) // Anchors the marker on the bottom left
    .position(new LatLng(-6.361964, 106.775808))
    .title("PT. Solia Mitra Motor").snippet("Jln. Limo Raya No.5 Cinere Depok <br/> Phone : 0217540506"));

    map.addMarker(new MarkerOptions()
    .icon(BitmapDescriptorFactory.fromResource(R.drawable.marker))
    .anchor(0.0f, 1.0f) // Anchors the marker on the bottom left
    .position(new LatLng(-6.3845335,106.8285415))
    .title("Mahkota Depok")
    .snippet("Jln. Raya Margonda No.209  <br/> Phone : 02177210208"));

    map.addMarker(new MarkerOptions()
    .icon(BitmapDescriptorFactory.fromResource(R.drawable.marker))
    .anchor(0.0f, 1.0f) // Anchors the marker on the bottom left
    .position(new LatLng(-6.111662, 106.911759))

    .title("Mahkota Arif Rahman Hakim").snippet("Jln. Arif Rahman Hakim No.78 <br/> phone : 02177202260"));

    map.addMarker(new MarkerOptions()
    .icon(BitmapDescriptorFactory.fromResource(R.drawable.marker))
    .anchor(0.0f, 1.0f) // Anchors the marker on the bottom left
    .position(new LatLng(-6.451293, 106.798896))
    .title("PT.Suzuki Citayam").snippet("Jln. Pabuaran Raya No.44-46 Kampung Pintu Air Pabuaran <br/> phone : 02187990951"));

    map.addMarker(new MarkerOptions()
    .icon(BitmapDescriptorFactory.fromResource(R.drawable.marker))
    .anchor(0.0f, 1.0f) // Anchors the marker on the bottom left
    .position(new LatLng(-6.383348, 106.814409))
    .title("PT. Singgalang Motor").snippet("Jln. Nusantara Raya Depok <br/> phone : 021 77212827"));

    map.addMarker(new MarkerOptions()
    .icon(BitmapDescriptorFactory.fromResource(R.drawable.marker))
    .anchor(0.0f, 1.0f) // Anchors the marker on the bottom left
    .position(new LatLng(-6.401883, 106.836572))
    .title("PT. Galaxy Prima Depok").snippet("Jln. Kemakmuran Raya No.50 <br/> phone : 02177825282"));

    map.addMarker(new MarkerOptions()
    .icon(BitmapDescriptorFactory.fromResource(R.drawable.marker))
        .anchor(0.0f, 1.0f) // Anchors the marker on the bottom left
    .position(new LatLng(-6.3901018,106.8268545))
    .title("PT. Suzuki SEM Depok").snippet("Jln. Margonda Raya No.27 <br/> phone : 0217764887"));

    map.addMarker(new MarkerOptions()
    .icon(BitmapDescriptorFactory.fromResource(R.drawable.marker))
    .anchor(0.0f, 1.0f) // Anchors the marker on the bottom left
    .position(new LatLng(-6.391512, 106.851940))
    .title("Suzuki DIPA Motor").snippet("<p>" +"Jln. Kejayaan Raya" + "<br/> " + "phone : 021 77831015"));

    map.addMarker(new MarkerOptions()
    .icon(BitmapDescriptorFactory.fromResource(R.drawable.marker))
    .anchor(0.0f, 1.0f) // Anchors the marker on the bottom left
    .position(new LatLng(-6.3901018,106.8268545))
    .title("PT. Tugu Gema Motorindo").snippet("Jln. Akses UI No. 25 <br/> phone : (021) 8701111, (021) 8702222"));

    map.addMarker(new MarkerOptions()
    .icon(BitmapDescriptorFactory.fromResource(R.drawable.marker))
    .anchor(0.0f, 1.0f) // Anchors the marker on the bottom left
    .position(new LatLng(-6.3590335,106.8586754))
    .title("PT. Restu Mahkota Karya").snippet("Jl. Raya Bogor Km,29 No.18 Cimanggis <br/> phone : 021 87708918"));

    map.addMarker(new MarkerOptions()
    .icon(BitmapDescriptorFactory.fromResource(R.drawable.marker))
    .anchor(0.0f, 1.0f) // Anchors the marker on the bottom left
    .position(new LatLng(-6.3779722,106.8650424))
    .title("Suzuki Cisalak").snippet("Jalan Raya Bogor KM.31 <br/> phone : 021 8722624"));
}

@Override
public void onLocationChanged(Location location) {
    // Draw the marker, if destination location is not set
    if(mMarkerPoints.size() < 2){

        mLatitude = location.getLatitude();
        mLongitude = location.getLongitude();
        LatLng point = new LatLng(mLatitude, mLongitude);

        map.moveCamera(CameraUpdateFactory.newLatLng(point));
        map.animateCamera(CameraUpdateFactory.zoomTo(12));

        drawMarker(point);
    }
}

@Override
public void onProviderDisabled(String provider) {
    // TODO Auto-generated method stub
}

@Override
public void onProviderEnabled(String provider) {
    // TODO Auto-generated method stub
}

@Override
public void onStatusChanged(String provider, int status, Bundle extras) {
    // TODO Auto-generated method stub
}
}      

thanks

Answer 1

You can use the following URL to get the get routes from google in JSON format:

http://maps.googleapis.com/maps/api/directions/json?origin=startLatLng&destination=endLatLng&sensor=false&mode=driving&alternatives=false

private static ArrayList<LatLng> getRoutePoints(String url) {
        JSONObject dirJson = Json.getJson(url);
        if (dirJson != null) {
            try {
                ArrayList<LatLng> routeLine = decodeOverviewPolyline(dirJson
                        .getJSONArray("routes").getJSONObject(0)
                        .getJSONObject("overview_polyline").getString("points"));
                if (routeLine != null & routeLine.size() > 0)
                    return routeLine;
            } catch (JSONException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
        }
        return null;
    }


private static ArrayList<LatLng> decodeOverviewPolyline(String encoded) {
        ArrayList<LatLng> poly = new ArrayList<LatLng>();
        int index = 0, len = encoded.length();
        int lat = 0, lng = 0;

        while (index < len) {
            int b, shift = 0, result = 0;
            do {
                b = encoded.charAt(index++) - 63;
                result |= (b & 0x1f) << shift;
                shift += 5;
            } while (b >= 0x20);
            int dlat = ((result & 1) != 0 ? ~(result >> 1) : (result >> 1));
            lat += dlat;

            shift = 0;
            result = 0;
            do {
                b = encoded.charAt(index++) - 63;
                result |= (b & 0x1f) << shift;
                shift += 5;
            } while (b >= 0x20);
            int dlng = ((result & 1) != 0 ? ~(result >> 1) : (result >> 1));
            lng += dlng;

            LatLng p = new LatLng((double) lat / 1E5, (double) lng / 1E5);
            poly.add(p);
        }
        return poly;

    }

EDIT:

Follow the steps to show driving route from your location (GPS) to clicked marker.

1. Obtain current location LatLng

2. In the click event of the marker call the URL with startLatLng as current location and endLatLng as the marker location (Note: Run this in an AsyncTask to avoid NetworkOnMainThread exception.

3. Draw the route on the map using the ArrayList of LatLng returned by getRoutePointsmethod.

Answer 2

Try this way,hope this will help you to solve your problem.

String uri = "http://maps.google.com/maps?f=d&hl=es&saddr="+startingLatitude+","+startingLongitude+"&daddr="+endingLatitude+","+endingLongitude;
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);