thoerup/traininfo/StationLocator.java

package dk.thoerup.traininfo;

import java.util.ArrayList;
import java.util.List;

import org.json.JSONArray;
import org.json.JSONObject;

import android.content.Context;
import android.location.Criteria;
import android.location.Location;
import android.location.LocationListener;
import android.location.LocationManager;
import android.location.LocationProvider;
import android.os.Bundle;
import android.os.Handler;
import android.util.Log;
import dk.thoerup.traininfo.util.DownloadUtil;

public class StationLocator implements LocationListener{

        LocationManager locManager;
        Context cntx;
        Handler hndl;

        ArrayList<StationBean> stationList = new ArrayList<StationBean>();
        List<StationBean> safeStationList = java.util.Collections.unmodifiableList(stationList);

        
        Location savedLocation = null;

        public StationLocator(Context c, Handler h) {
                cntx = c;
                hndl = h;
        }
        
        public List<StationBean> getStations() {
                return safeStationList;
        }
        
        public void abortLocationListener() {
                locManager.removeUpdates(this);
        }

        public void locateStations() {
                //http://www.google.com/uds/GlocalSearch?callback=google.search.LocalSearch.RawCompletion&context=1&lstkp=0&rsz=small&hl=en&source=gsc&gss=.com&sig=fadf0e8d483d0f70bea11d5905010a16&q=Train%20station&near=56.377424%2C9.656695&key=ABQIAAAA1XbMiDxx_BTCY2_FkPh06RRaGTYH6UMl8mADNa0YKuWNNa8VNxQEerTAUcfkyrr6OwBovxn7TDAH5Q&v=1.0&nocache=1249640467498

                locManager = (LocationManager) cntx.getSystemService(Context.LOCATION_SERVICE);
                /*//testcode
                List<String> provs = locManager.getAllProviders();
                for (String p  : provs) {
                        Log.e("Provider", p);
                }
                provs = locManager.getProviders(true);
                for (String p  : provs) {
                        Log.e("ActiveProvider", p);
                }
                */
                Criteria c = new Criteria();
                c.setAccuracy(Criteria.ACCURACY_FINE);
                String bestProv = locManager.getBestProvider(c, true);
                Log.i("BestProvider", ""+bestProv);
                

                if (bestProv != null) {
                        savedLocation = locManager.getLastKnownLocation(bestProv);
                        locManager.requestLocationUpdates(bestProv, 0, 0, this);
                } else {
                        // message that no suitable provider was found
                        hndl.sendEmptyMessage(TrainInfoList.NOPROVIDER);
                }
        }
        @Override
        public void onLocationChanged(Location location) {
                Log.i("Location", "Got location fix " + location.getLatitude() + ", " + location.getLongitude() + " accuracy=" + location.getAccuracy() + " provider=" +location.getProvider());

                savedLocation = new Location(location); //save a copy
                
                if (location.getProvider().equals("gps") && location.getAccuracy() > 100) //if we have a gps provider lets wait for a more precise fix
                        return;

                locManager.removeUpdates(this);
                hndl.sendEmptyMessage(TrainInfoList.GOTLOCATION);
        }
        
        public void findNearestStations() {
                findNearestStations(savedLocation);
        }
        
        public void findNearestStations(Location location) {
                //ToDo: to be nice put the api key into the request
                String urlSource = "http://www.google.com/uds/GlocalSearch?callback=google.search.LocalSearch.RawCompletion&context=1&q=Train%20station&near=" + location.getLatitude() + "%2C" + location.getLongitude() + "&v=1.0";
                //String urlSource = "http://www.google.com/uds/GlocalSearch?callback=google.search.LocalSearch.RawCompletion&context=1&q=Train%20station&near=56.2%2C9.0&v=1.0";

                try {
                        String data = DownloadUtil.getContent(urlSource, 30000, "UTF-8");
                        StringBuilder builder = new StringBuilder(data);

                        while (builder.charAt(0) != '{')
                                builder.deleteCharAt(0);
                        while (builder.charAt(builder.length()-1) != '}')
                                builder.deleteCharAt(builder.length()-1);

                        JSONObject json = new JSONObject(builder.toString());
                        // now have some fun with the results...
                        JSONArray res = json.getJSONArray("results");

                        Location tmpLocation = new Location("gps");
                        stationList.clear();
                        
                        for (int i=0; i<res.length(); i++) {
                                JSONObject jsonStation = res.getJSONObject(i);

                                double lat = jsonStation.getDouble("lat");
                                double lng = jsonStation.getDouble("lng");
                                String title = jsonStation.getString("title");
                                String addr = jsonStation.getString("streetAddress");
                                tmpLocation.setLatitude(lat);
                                tmpLocation.setLongitude(lng);

                                float distance = location.distanceTo(tmpLocation);

                                stationList.add( new StationBean(title,lat,lng,(int)distance,addr) );

                                Log.e("Location", title + " " + lat +"," + lng);
                        }
                        hndl.sendEmptyMessage(TrainInfoList.GOTSTATIONLIST);

                } catch (Exception e) {
                        Log.e("Location","Location",e);
                        hndl.sendEmptyMessage(TrainInfoList.LOOKUPSTATIONFAILED);
                }
                        
        }


        @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

        }

        public static void injectMockLocation(Context cntx) {
                Location odder = new Location("gps2"); 
                odder.setLatitude(55.976632);
                odder.setLongitude(10.16407);
                
                Location kbh = new Location("gps2"); //Christiansborg 55.675092,12.578573
                kbh.setLatitude(55.675092);
                kbh.setLongitude(12.578573);
                
                LocationManager lm = (LocationManager) cntx.getSystemService(Context.LOCATION_SERVICE);
                if (lm.getProvider("gps2") == null)
                        lm.addTestProvider("gps2", false, true, true, false, false, false, false, 0, Criteria.ACCURACY_FINE );
                lm.setTestProviderEnabled("gps2", true);
                lm.setTestProviderLocation("gps2", kbh);
        }
        
        public static void removeMockLocation(Context cntx) {
                LocationManager lm = (LocationManager) cntx.getSystemService(Context.LOCATION_SERVICE);
                if (lm.getProvider("gps2") != null)
                        lm.removeTestProvider("gps2");
        }
}
1	package dk.thoerup.traininfo;
2
3	import java.util.ArrayList;
4	import java.util.List;
5
6	import org.json.JSONArray;
7	import org.json.JSONObject;
8
9	import android.content.Context;
10	import android.location.Criteria;
11	import android.location.Location;
12	import android.location.LocationListener;
13	import android.location.LocationManager;
14	import android.location.LocationProvider;
15	import android.os.Bundle;
16	import android.os.Handler;
17	import android.util.Log;
18	import dk.thoerup.traininfo.util.DownloadUtil;
19
20	public class StationLocator implements LocationListener{
21
22	LocationManager locManager;
23	Context cntx;
24	Handler hndl;
25
26	ArrayList<StationBean> stationList = new ArrayList<StationBean>();
27	List<StationBean> safeStationList = java.util.Collections.unmodifiableList(stationList);
28
29
30	Location savedLocation = null;
31
32	public StationLocator(Context c, Handler h) {
33	cntx = c;
34	hndl = h;
35	}
36
37	public List<StationBean> getStations() {
38	return safeStationList;
39	}
40
41	public void abortLocationListener() {
42	locManager.removeUpdates(this);
43	}
44
45	public void locateStations() {
46	//http://www.google.com/uds/GlocalSearch?callback=google.search.LocalSearch.RawCompletion&context=1&lstkp=0&rsz=small&hl=en&source=gsc&gss=.com&sig=fadf0e8d483d0f70bea11d5905010a16&q=Train%20station&near=56.377424%2C9.656695&key=ABQIAAAA1XbMiDxx_BTCY2_FkPh06RRaGTYH6UMl8mADNa0YKuWNNa8VNxQEerTAUcfkyrr6OwBovxn7TDAH5Q&v=1.0&nocache=1249640467498
47
48	locManager = (LocationManager) cntx.getSystemService(Context.LOCATION_SERVICE);
49	/*//testcode
50	List<String> provs = locManager.getAllProviders();
51	for (String p : provs) {
52	Log.e("Provider", p);
53	}
54	provs = locManager.getProviders(true);
55	for (String p : provs) {
56	Log.e("ActiveProvider", p);
57	}
58	*/
59	Criteria c = new Criteria();
60	c.setAccuracy(Criteria.ACCURACY_FINE);
61	String bestProv = locManager.getBestProvider(c, true);
62	Log.i("BestProvider", ""+bestProv);
63
64
65	if (bestProv != null) {
66	savedLocation = locManager.getLastKnownLocation(bestProv);
67	locManager.requestLocationUpdates(bestProv, 0, 0, this);
68	} else {
69	// message that no suitable provider was found
70	hndl.sendEmptyMessage(TrainInfoList.NOPROVIDER);
71	}
72	}
73	@Override
74	public void onLocationChanged(Location location) {
75	Log.i("Location", "Got location fix " + location.getLatitude() + ", " + location.getLongitude() + " accuracy=" + location.getAccuracy() + " provider=" +location.getProvider());
76
77	savedLocation = new Location(location); //save a copy
78
79	if (location.getProvider().equals("gps") && location.getAccuracy() > 100) //if we have a gps provider lets wait for a more precise fix
80	return;
81
82	locManager.removeUpdates(this);
83	hndl.sendEmptyMessage(TrainInfoList.GOTLOCATION);
84	}
85
86	public void findNearestStations() {
87	findNearestStations(savedLocation);
88	}
89
90	public void findNearestStations(Location location) {
91	//ToDo: to be nice put the api key into the request
92	String urlSource = "http://www.google.com/uds/GlocalSearch?callback=google.search.LocalSearch.RawCompletion&context=1&q=Train%20station&near=" + location.getLatitude() + "%2C" + location.getLongitude() + "&v=1.0";
93	//String urlSource = "http://www.google.com/uds/GlocalSearch?callback=google.search.LocalSearch.RawCompletion&context=1&q=Train%20station&near=56.2%2C9.0&v=1.0";
94
95	try {
96	String data = DownloadUtil.getContent(urlSource, 30000, "UTF-8");
97	StringBuilder builder = new StringBuilder(data);
98
99	while (builder.charAt(0) != '{')
100	builder.deleteCharAt(0);
101	while (builder.charAt(builder.length()-1) != '}')
102	builder.deleteCharAt(builder.length()-1);
103
104	JSONObject json = new JSONObject(builder.toString());
105	// now have some fun with the results...
106	JSONArray res = json.getJSONArray("results");
107
108	Location tmpLocation = new Location("gps");
109	stationList.clear();
110
111	for (int i=0; i<res.length(); i++) {
112	JSONObject jsonStation = res.getJSONObject(i);
113
114	double lat = jsonStation.getDouble("lat");
115	double lng = jsonStation.getDouble("lng");
116	String title = jsonStation.getString("title");
117	String addr = jsonStation.getString("streetAddress");
118	tmpLocation.setLatitude(lat);
119	tmpLocation.setLongitude(lng);
120
121	float distance = location.distanceTo(tmpLocation);
122
123	stationList.add( new StationBean(title,lat,lng,(int)distance,addr) );
124
125	Log.e("Location", title + " " + lat +"," + lng);
126	}
127	hndl.sendEmptyMessage(TrainInfoList.GOTSTATIONLIST);
128
129	} catch (Exception e) {
130	Log.e("Location","Location",e);
131	hndl.sendEmptyMessage(TrainInfoList.LOOKUPSTATIONFAILED);
132	}
133
134	}
135
136
137	@Override
138	public void onProviderDisabled(String provider) {
139	// TODO Auto-generated method stub
140
141	}
142
143
144	@Override
145	public void onProviderEnabled(String provider) {
146	// TODO Auto-generated method stub
147
148	}
149
150
151	@Override
152	public void onStatusChanged(String provider, int status, Bundle extras) {
153	// TODO Auto-generated method stub
154
155	}
156
157	public static void injectMockLocation(Context cntx) {
158	Location odder = new Location("gps2");
159	odder.setLatitude(55.976632);
160	odder.setLongitude(10.16407);
161
162	Location kbh = new Location("gps2"); //Christiansborg 55.675092,12.578573
163	kbh.setLatitude(55.675092);
164	kbh.setLongitude(12.578573);
165
166	LocationManager lm = (LocationManager) cntx.getSystemService(Context.LOCATION_SERVICE);
167	if (lm.getProvider("gps2") == null)
168	lm.addTestProvider("gps2", false, true, true, false, false, false, false, 0, Criteria.ACCURACY_FINE );
169	lm.setTestProviderEnabled("gps2", true);
170	lm.setTestProviderLocation("gps2", kbh);
171	}
172
173	public static void removeMockLocation(Context cntx) {
174	LocationManager lm = (LocationManager) cntx.getSystemService(Context.LOCATION_SERVICE);
175	if (lm.getProvider("gps2") != null)
176	lm.removeTestProvider("gps2");
177	}
178	}