thoerup/traininfo/StationLocator.java

package dk.thoerup.traininfo;

import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.net.URL;
import java.net.URLConnection;
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.os.Bundle;
import android.os.Handler;
import android.util.Log;

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);

        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.e("BestProvider", bestProv);

                if (bestProv != null) {
                        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());

                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);
                
                //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 {
                        Log.e("Url", urlSource);
                        URL url = new URL(urlSource);
                        URLConnection connection = url.openConnection();
                        connection.setConnectTimeout(5000);

                        String line;
                        StringBuilder builder = new StringBuilder();
                        BufferedReader reader = new BufferedReader(new InputStreamReader(connection.getInputStream()), 8192);
                        while((line = reader.readLine()) != null) {
                                builder.append(line);
                        }

                        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

        }
}
1	package dk.thoerup.traininfo;
2
3	import java.io.BufferedReader;
4	import java.io.InputStreamReader;
5	import java.net.URL;
6	import java.net.URLConnection;
7	import java.util.ArrayList;
8	import java.util.List;
9
10	import org.json.JSONArray;
11	import org.json.JSONObject;
12
13	import android.content.Context;
14	import android.location.Criteria;
15	import android.location.Location;
16	import android.location.LocationListener;
17	import android.location.LocationManager;
18	import android.os.Bundle;
19	import android.os.Handler;
20	import android.util.Log;
21
22	public class StationLocator implements LocationListener{
23
24	LocationManager locManager;
25	Context cntx;
26	Handler hndl;
27
28	ArrayList<StationBean> stationList = new ArrayList<StationBean>();
29	List<StationBean> safeStationList = java.util.Collections.unmodifiableList(stationList);
30
31	public StationLocator(Context c, Handler h) {
32	cntx = c;
33	hndl = h;
34	}
35
36	public List<StationBean> getStations() {
37	return safeStationList;
38	}
39
40	public void abortLocationListener() {
41	locManager.removeUpdates(this);
42	}
43
44	public void locateStations() {
45	//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
46
47	locManager = (LocationManager) cntx.getSystemService(Context.LOCATION_SERVICE);
48	/*//testcode
49	List<String> provs = locManager.getAllProviders();
50	for (String p : provs) {
51	Log.e("Provider", p);
52	}
53	provs = locManager.getProviders(true);
54	for (String p : provs) {
55	Log.e("ActiveProvider", p);
56	}
57	*/
58	Criteria c = new Criteria();
59	c.setAccuracy(Criteria.ACCURACY_FINE);
60	String bestProv = locManager.getBestProvider(c, true);
61	Log.e("BestProvider", bestProv);
62
63	if (bestProv != null) {
64	locManager.requestLocationUpdates(bestProv, 0, 0, this);
65	} else {
66	// message that no suitable provider was found
67	hndl.sendEmptyMessage(TrainInfoList.NOPROVIDER);
68	}
69	}
70	@Override
71	public void onLocationChanged(Location location) {
72	Log.i("Location", "Got location fix " + location.getLatitude() + ", " + location.getLongitude() + " accuracy=" + location.getAccuracy() + " provider=" +location.getProvider());
73
74	if (location.getProvider().equals("gps") && location.getAccuracy() > 100) //if we have a gps provider lets wait for a more precise fix
75	return;
76
77	locManager.removeUpdates(this);
78	hndl.sendEmptyMessage(TrainInfoList.GOTLOCATION);
79
80	//ToDo: to be nice put the api key into the request
81	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";
82	//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";
83
84	try {
85	Log.e("Url", urlSource);
86	URL url = new URL(urlSource);
87	URLConnection connection = url.openConnection();
88	connection.setConnectTimeout(5000);
89
90	String line;
91	StringBuilder builder = new StringBuilder();
92	BufferedReader reader = new BufferedReader(new InputStreamReader(connection.getInputStream()), 8192);
93	while((line = reader.readLine()) != null) {
94	builder.append(line);
95	}
96
97	while (builder.charAt(0) != '{')
98	builder.deleteCharAt(0);
99	while (builder.charAt(builder.length()-1) != '}')
100	builder.deleteCharAt(builder.length()-1);
101
102	JSONObject json = new JSONObject(builder.toString());
103	// now have some fun with the results...
104	JSONArray res = json.getJSONArray("results");
105
106	Location tmpLocation = new Location("gps");
107	stationList.clear();
108
109	for (int i=0; i<res.length(); i++) {
110	JSONObject jsonStation = res.getJSONObject(i);
111
112	double lat = jsonStation.getDouble("lat");
113	double lng = jsonStation.getDouble("lng");
114	String title = jsonStation.getString("title");
115	String addr = jsonStation.getString("streetAddress");
116	tmpLocation.setLatitude(lat);
117	tmpLocation.setLongitude(lng);
118
119	float distance = location.distanceTo(tmpLocation);
120
121	stationList.add( new StationBean(title,lat,lng,(int)distance,addr) );
122
123	Log.e("Location", title + " " + lat +"," + lng);
124	}
125	hndl.sendEmptyMessage(TrainInfoList.GOTSTATIONLIST);
126
127	} catch (Exception e) {
128	Log.e("Location","Location",e);
129	hndl.sendEmptyMessage(TrainInfoList.LOOKUPSTATIONFAILED);
130	}
131
132	}
133
134
135	@Override
136	public void onProviderDisabled(String provider) {
137	// TODO Auto-generated method stub
138
139	}
140
141
142	@Override
143	public void onProviderEnabled(String provider) {
144	// TODO Auto-generated method stub
145
146	}
147
148
149	@Override
150	public void onStatusChanged(String provider, int status, Bundle extras) {
151	// TODO Auto-generated method stub
152
153	}
154	}