Waypoint

package com.d4mdp.plesir.activity;

import android.Manifest;
import android.content.pm.PackageManager;
import android.graphics.Color;
import android.os.AsyncTask;
import android.os.Bundle;
import android.support.v4.app.FragmentActivity;
import android.util.Log;

import com.d4mdp.plesir.R;
import com.d4mdp.plesir.util.DirectionsJSONParser;
import com.google.android.gms.maps.CameraUpdateFactory;
import com.google.android.gms.maps.GoogleMap;
import com.google.android.gms.maps.SupportMapFragment;
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;

/**
 * Created by Achmad Siddik on 18/04/2016.
 */
public class WayPointMapActivity extends FragmentActivity {
    GoogleMap map;
    public static ArrayList<HashMap<String,String>> markerPoints=new ArrayList<>();

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

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

        map.setMyLocationEnabled(true);
        addingMap();
    }

    public void addingMap(){
        if(markerPoints.size() >= 2){
            double latitudeOrigin=Double.parseDouble(markerPoints.get(0).get("latitude"));
            double longitudeOrigin=Double.parseDouble(markerPoints.get(0).get("longitude"));
            LatLng origin = new LatLng(latitudeOrigin,longitudeOrigin);
            double latitudeDest=Double.parseDouble(markerPoints.get(markerPoints.size()-1).get("latitude"));
            double longitudeDest=Double.parseDouble(markerPoints.get(markerPoints.size()-1).get("longitude"));
            LatLng dest = new LatLng(latitudeDest,longitudeDest);
            MarkerOptions options=new MarkerOptions();
            options.title(markerPoints.get(0).get("location_name"));
            MarkerOptions options2=new MarkerOptions();
            options2.title(markerPoints.get(markerPoints.size()-1).get("location_name"));
            options.position(origin);
            options2.position(dest);
            map.addMarker(options);
            map.addMarker(options2);
            map.animateCamera(CameraUpdateFactory.newLatLngZoom(origin,13));
            // 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";

        // Waypoints
        String waypoints = "";
        for(int i=1;i<markerPoints.size();i++){
            HashMap<String,String> pecahData=markerPoints.get(i);
            String getLocationName=pecahData.get("location_name");
            double getLatitude=Double.parseDouble(pecahData.get("latitude"));
            double getLongitude=Double.parseDouble(pecahData.get("longitude"));
            MarkerOptions options=new MarkerOptions();
            LatLng point  = new LatLng(getLatitude,getLongitude);
            options.title(getLocationName);
            options.position(point);
            map.addMarker(options);

            if(i==1)
                waypoints = "waypoints=";
            waypoints += point.latitude + "," + point.longitude + "|";
        }

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

        // 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;
    }

    // Fetches data from url passed
    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 Places 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(5);
                lineOptions.color(Color.RED);
            }

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