Java tutorial
/* * AnyPlace: A free and open Indoor Navigation Service with superb accuracy! * * Anyplace is a first-of-a-kind indoor information service offering GPS-less * localization, navigation and search inside buildings using ordinary smartphones. * * Author(s): * //http://blog-emildesign.rhcloud.com/?p=822 * Timotheos Constambeys * * Supervisor: Demetrios Zeinalipour-Yazti * * URL: http://anyplace.cs.ucy.ac.cy * Contact: anyplace@cs.ucy.ac.cy * * Copyright (c) 2015, Data Management Systems Lab (DMSL), University of Cyprus. * All rights reserved. * * Permission is hereby granted, free of charge, to any person obtaining a copy of * this software and associated documentation files (the "Software"), to deal in the * Software without restriction, including without limitation the rights to use, copy, * modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, * and to permit persons to whom the Software is furnished to do so, subject to the * following conditions: * * The above copyright notice and this permission notice shall be included in all * copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER * DEALINGS IN THE SOFTWARE. * */ package com.dmsl.anyplace.googleapi; import java.io.InputStream; import java.util.ArrayList; import java.util.List; import javax.xml.parsers.DocumentBuilder; import javax.xml.parsers.DocumentBuilderFactory; import org.apache.http.HttpResponse; import org.apache.http.client.HttpClient; import org.apache.http.client.methods.HttpPost; import org.apache.http.impl.client.DefaultHttpClient; import org.apache.http.params.BasicHttpParams; import org.apache.http.params.HttpConnectionParams; import org.apache.http.params.HttpParams; import org.apache.http.protocol.BasicHttpContext; import org.apache.http.protocol.HttpContext; import org.w3c.dom.Document; import org.w3c.dom.Node; import org.w3c.dom.NodeList; import com.dmsl.anyplace.utils.GeoPoint; import com.google.android.gms.maps.model.LatLng; import com.google.maps.android.PolyUtil; import android.util.Log; public class GMapV2Direction { public final static String MODE_DRIVING = "driving"; public final static String MODE_WALKING = "walking"; public GMapV2Direction() { } public Document getDocument(double fromLatitude, double fromLongitude, GeoPoint toPosition, String mode) throws Exception { String url = "http://maps.googleapis.com/maps/api/directions/xml?" + "origin=" + fromLatitude + "," + fromLongitude + "&destination=" + toPosition.lat + "," + toPosition.lng + "&sensor=false&units=metric&mode=" + mode; HttpParams httpParameters = new BasicHttpParams(); HttpConnectionParams.setConnectionTimeout(httpParameters, 20000); // 20seconds HttpConnectionParams.setSoTimeout(httpParameters, 20000); // 20 seconds HttpClient httpClient = new DefaultHttpClient(httpParameters); HttpPost httpPost = new HttpPost(url); HttpContext localContext = new BasicHttpContext(); HttpResponse response = httpClient.execute(httpPost, localContext); InputStream in = response.getEntity().getContent(); DocumentBuilder builder = DocumentBuilderFactory.newInstance().newDocumentBuilder(); Document doc = builder.parse(in); return doc; } public String getDurationText(Document doc) { NodeList nl1 = doc.getElementsByTagName("duration"); Node node1 = nl1.item(0); NodeList nl2 = node1.getChildNodes(); Node node2 = nl2.item(getNodeIndex(nl2, "text")); Log.i("DurationText", node2.getTextContent()); return node2.getTextContent(); } public int getDurationValue(Document doc) { NodeList nl1 = doc.getElementsByTagName("duration"); Node node1 = nl1.item(0); NodeList nl2 = node1.getChildNodes(); Node node2 = nl2.item(getNodeIndex(nl2, "value")); Log.i("DurationValue", node2.getTextContent()); return Integer.parseInt(node2.getTextContent()); } public String getDistanceText(Document doc) { NodeList nl1 = doc.getElementsByTagName("distance"); Node node1 = nl1.item(0); NodeList nl2 = node1.getChildNodes(); Node node2 = nl2.item(getNodeIndex(nl2, "text")); Log.i("DistanceText", node2.getTextContent()); return node2.getTextContent(); } public int getDistanceValue(Document doc) { NodeList nl1 = doc.getElementsByTagName("distance"); Node node1 = nl1.item(0); NodeList nl2 = node1.getChildNodes(); Node node2 = nl2.item(getNodeIndex(nl2, "value")); Log.i("DistanceValue", node2.getTextContent()); return Integer.parseInt(node2.getTextContent()); } public String getStartAddress(Document doc) { NodeList nl1 = doc.getElementsByTagName("start_address"); Node node1 = nl1.item(0); Log.i("StartAddress", node1.getTextContent()); return node1.getTextContent(); } public String getEndAddress(Document doc) { NodeList nl1 = doc.getElementsByTagName("end_address"); Node node1 = nl1.item(0); Log.i("StartAddress", node1.getTextContent()); return node1.getTextContent(); } public String getCopyRights(Document doc) { NodeList nl1 = doc.getElementsByTagName("copyrights"); Node node1 = nl1.item(0); Log.i("CopyRights", node1.getTextContent()); return node1.getTextContent(); } public ArrayList<LatLng> getDirection(Document doc) { NodeList nl1, nl2, nl3; ArrayList<LatLng> listGeopoints = new ArrayList<LatLng>(); nl1 = doc.getElementsByTagName("step"); if (nl1.getLength() > 0) { for (int i = 0; i < nl1.getLength(); i++) { Node node1 = nl1.item(i); nl2 = node1.getChildNodes(); Node locationNode = nl2.item(getNodeIndex(nl2, "start_location")); nl3 = locationNode.getChildNodes(); Node latNode = nl3.item(getNodeIndex(nl3, "lat")); double lat = Double.parseDouble(latNode.getTextContent()); Node lngNode = nl3.item(getNodeIndex(nl3, "lng")); double lng = Double.parseDouble(lngNode.getTextContent()); listGeopoints.add(new LatLng(lat, lng)); locationNode = nl2.item(getNodeIndex(nl2, "polyline")); nl3 = locationNode.getChildNodes(); latNode = nl3.item(getNodeIndex(nl3, "points")); //ArrayList<LatLng> arr = decodePoly(latNode.getTextContent()); List<LatLng> arr = PolyUtil.decode(latNode.getTextContent()); for (int j = 0; j < arr.size(); j++) { listGeopoints.add(new LatLng(arr.get(j).latitude, arr.get(j).longitude)); } locationNode = nl2.item(getNodeIndex(nl2, "end_location")); nl3 = locationNode.getChildNodes(); latNode = nl3.item(getNodeIndex(nl3, "lat")); lat = Double.parseDouble(latNode.getTextContent()); lngNode = nl3.item(getNodeIndex(nl3, "lng")); lng = Double.parseDouble(lngNode.getTextContent()); listGeopoints.add(new LatLng(lat, lng)); } } return listGeopoints; } private int getNodeIndex(NodeList nl, String nodename) { for (int i = 0; i < nl.getLength(); i++) { if (nl.item(i).getNodeName().equals(nodename)) return i; } return -1; } private ArrayList<LatLng> decodePoly(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 position = new LatLng((double) lat / 1E5, (double) lng / 1E5); poly.add(position); } return poly; } }