/**
*
This file is part of the "Get There!" application for android developed
for the SFWR ENG 4G06 Capstone course in the 2014/2015 Fall/Winter
terms at McMaster University.
Copyright (C) 2015 M. Fluder, T. Miele, N. Mio, M. Ngo, and J. Rabaya
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package com.capstone.transit.trans_it;
import android.content.Intent;
import android.graphics.Color;
import android.location.Address;
import android.location.Geocoder;
import android.os.AsyncTask;
import android.support.v4.app.FragmentActivity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.Button;
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.BitmapDescriptorFactory;
import com.google.android.gms.maps.model.LatLng;
import com.google.android.gms.maps.model.LatLngBounds;
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 java.util.Locale;
public class TripDisplayActivity extends FragmentActivity {
private GoogleMap mMap; // Might be null if Google Play services APK is not available.
ArrayList<LatLng> mMarkerPoints;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_trip_display);
setUpMapIfNeeded();
double[] StartCoordinates,EndCoordinates;
StartCoordinates = getFromLocation(retrieveStartAddress());
EndCoordinates = getFromLocation(retrieveEndAddress());
LatLng origin = new LatLng(StartCoordinates[0], StartCoordinates[1]);
LatLng dest = new LatLng(EndCoordinates[0], EndCoordinates[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+"&mode=transit"+"&"+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("Excep 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
mMap.addPolyline(lineOptions);
}
}
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.
*/
if(mMarkerPoints.size()==1){
options.icon(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_GREEN));
}else if(mMarkerPoints.size()==2){
options.icon(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_RED));
}
// Add new marker to the Google Map Android API V2
mMap.addMarker(options);
}
public String retrieveStartAddress() {
Intent intent = getIntent();
return intent.getStringExtra("START_ADDRESS");
}
public String retrieveEndAddress() {
Intent intent = getIntent();
return intent.getStringExtra("END_ADDRESS");
}
public double[] getFromLocation(String address){
double[] Coordinates = new double[2];
Geocoder geoCoder = new Geocoder(this, Locale.getDefault());
try
{
Address addressConvert = geoCoder.getFromLocationName(address , 1).get(0);
Coordinates[0] = addressConvert.getLatitude();
Coordinates[1] = addressConvert.getLongitude();
}
catch(Exception ee)
{
}
return Coordinates;
}
@Override
protected void onResume() {
super.onResume();
setUpMapIfNeeded();
}
private void setUpMapIfNeeded() {
// Do a null check to confirm that we have not already instantiated the map.
if (mMap == null) {
// Try to obtain the map from the SupportMapFragment.
mMap = ((SupportMapFragment) getSupportFragmentManager().findFragmentById(R.id.map))
.getMap();
// Check if we were successful in obtaining the map.
if (mMap != null) {
setUpMap();
mMap.setMyLocationEnabled(true);
mMap.setOnMapLoadedCallback(new GoogleMap.OnMapLoadedCallback() {
@Override
public void onMapLoaded() {
double[] StartCoordinates,EndCoordinates;
StartCoordinates = getFromLocation(retrieveStartAddress());
EndCoordinates = getFromLocation(retrieveEndAddress());
LatLngBounds.Builder builder = new LatLngBounds.Builder();
builder.include(new LatLng(StartCoordinates[0], StartCoordinates[1]));
builder.include(new LatLng(EndCoordinates[0], EndCoordinates[1]));
LatLngBounds bounds = builder.build();
mMap.moveCamera(CameraUpdateFactory.newLatLngBounds(bounds,200));
}
});
}
}
}
private void setUpMap() {
double[] StartCoordinates,EndCoordinates;
StartCoordinates = getFromLocation(retrieveStartAddress());
EndCoordinates = getFromLocation(retrieveEndAddress());
mMap.addMarker(new MarkerOptions().position(new LatLng(StartCoordinates[0], StartCoordinates[1])).title("Start Address"));
mMap.addMarker(new MarkerOptions().position(new LatLng(EndCoordinates[0], EndCoordinates[1])).title("End Address"));
mMap.moveCamera(CameraUpdateFactory.newLatLngZoom(new LatLng(StartCoordinates[0], StartCoordinates[1]),13.0f));
}
}