maps route

ViewRouteActivity.java

package putugunation.com.mapsroute.activities;

import android.Manifest;
import android.app.Dialog;
import android.content.pm.PackageManager;
import android.graphics.Color;
import android.location.Criteria;
import android.location.Location;
import android.location.LocationListener;
import android.location.LocationManager;
import android.os.AsyncTask;
import android.os.Bundle;
import android.support.v4.app.ActivityCompat;
import android.support.v4.app.FragmentActivity;
import android.util.Log;
import android.widget.TextView;

import com.google.android.gms.common.ConnectionResult;
import com.google.android.gms.common.GooglePlayServicesUtil;
import com.google.android.gms.maps.CameraUpdateFactory;
import com.google.android.gms.maps.GoogleMap;
import com.google.android.gms.maps.MapFragment;
import com.google.android.gms.maps.model.BitmapDescriptorFactory;
import com.google.android.gms.maps.model.LatLng;
import com.google.android.gms.maps.model.MarkerOptions;
import com.google.android.gms.maps.model.PolylineOptions;

import org.json.JSONObject;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;

import putugunation.com.mapsroute.R;
import putugunation.com.mapsroute.helpers.Constant;
import putugunation.com.mapsroute.helpers.DirectionsJSONParser;
import putugunation.com.mapsroute.helpers.Utils;

/**
 * Created by putuguna on 9/20/2016.
 */
public class ViewRouteActivity extends FragmentActivity implements LocationListener {

    private GoogleMap mGoogleMap;
    private double mLatitude = 0;
    private double mLongitude = 0;
    private double latChosen;
    private double longChosen;
    private String namePlace;
    private String duration;
    private String distance;

    private TextView detail;

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

        detail = (TextView) findViewById(R.id.detail);


        latChosen = Double.parseDouble(Utils.getStrings(this, Constant.LAT_CHOSEN));
        longChosen = Double.parseDouble(Utils.getStrings(this, Constant.LONG_CHOSEN));
        namePlace = Utils.getStrings(this, Constant.NAME_CHOSEN);
        duration = Utils.getStrings(this, Constant.DURATION_CHOSEN);
        distance = Utils.getStrings(this, Constant.DISTANCE_CHOSEN);
        Log.d("TAG", "CHOSEN : " + latChosen + " : " + longChosen);

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

        // 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

            // Getting reference to SupportMapFragment of the activity_main
            MapFragment fm = (MapFragment) getFragmentManager().findFragmentById(R.id.map_view);

            // Getting Map for the SupportMapFragment
            mGoogleMap = fm.getMapAsync(this);

            // Enable MyLocation Button in the Map
            if (ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
                // TODO: Consider calling
                //    ActivityCompat#requestPermissions
                // here to request the missing permissions, and then overriding
                //   public void onRequestPermissionsResult(int requestCode, String[] permissions,
                //                                          int[] grantResults)
                // to handle the case where the user grants the permission. See the documentation
                // for ActivityCompat#requestPermissions for more details.
                return;
            }
            mGoogleMap.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);


            LatLng origin = new LatLng(mLatitude, mLongitude);
            LatLng dest = new LatLng(latChosen, longChosen);

            // 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);
        }

        // otherMarker();
    }

    @Override
    public void onLocationChanged(Location location) {
        // Draw the marker, if destination location is not set
        mLatitude = location.getLatitude();
        mLongitude = location.getLongitude();
        LatLng point = new LatLng(mLatitude, mLongitude);

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

        drawMarker(point);
    }

    @Override
    public void onStatusChanged(String provider, int status, Bundle extras) {

    }

    @Override
    public void onProviderEnabled(String provider) {

    }

    @Override
    public void onProviderDisabled(String provider) {

    }


    /**
     * this method used to get LatLng of origin and destination
     * @param origin
     * @param dest
     * @return
     */

    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;
    }


    /**
     * this method used to download json's data from URL
     * @param strUrl
     * @return
     * @throws IOException
     */
    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("TAG","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;

            // 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);

                    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);
            }

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

    /**
     * this method used to draw a marker from LatLng
     * @param point
     */
    private void drawMarker(LatLng point){
        // Creating MarkerOptions
        MarkerOptions options = new MarkerOptions();
        options.position(point);
        options.icon(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_GREEN));
        options.title("Hi You!");
        options.snippet("Your Location");
        mGoogleMap.addMarker(options).showInfoWindow();

        //map others
        mGoogleMap.addMarker(new MarkerOptions().position(new LatLng(latChosen, longChosen)).title(namePlace).snippet("Your Destination")).showInfoWindow();
    }
}