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 dk.thoerup.traininfo.util.DownloadUtil;

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 {
                        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

        }
}
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 dk.thoerup.traininfo.util.DownloadUtil;
14
15	import android.content.Context;
16	import android.location.Criteria;
17	import android.location.Location;
18	import android.location.LocationListener;
19	import android.location.LocationManager;
20	import android.os.Bundle;
21	import android.os.Handler;
22	import android.util.Log;
23
24	public class StationLocator implements LocationListener{
25
26	LocationManager locManager;
27	Context cntx;
28	Handler hndl;
29
30	ArrayList<StationBean> stationList = new ArrayList<StationBean>();
31	List<StationBean> safeStationList = java.util.Collections.unmodifiableList(stationList);
32
33	public StationLocator(Context c, Handler h) {
34	cntx = c;
35	hndl = h;
36	}
37
38	public List<StationBean> getStations() {
39	return safeStationList;
40	}
41
42	public void abortLocationListener() {
43	locManager.removeUpdates(this);
44	}
45
46	public void locateStations() {
47	//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
48
49	locManager = (LocationManager) cntx.getSystemService(Context.LOCATION_SERVICE);
50	/*//testcode
51	List<String> provs = locManager.getAllProviders();
52	for (String p : provs) {
53	Log.e("Provider", p);
54	}
55	provs = locManager.getProviders(true);
56	for (String p : provs) {
57	Log.e("ActiveProvider", p);
58	}
59	*/
60	Criteria c = new Criteria();
61	c.setAccuracy(Criteria.ACCURACY_FINE);
62	String bestProv = locManager.getBestProvider(c, true);
63	Log.e("BestProvider", bestProv);
64
65	if (bestProv != null) {
66	locManager.requestLocationUpdates(bestProv, 0, 0, this);
67	} else {
68	// message that no suitable provider was found
69	hndl.sendEmptyMessage(TrainInfoList.NOPROVIDER);
70	}
71	}
72	@Override
73	public void onLocationChanged(Location location) {
74	Log.i("Location", "Got location fix " + location.getLatitude() + ", " + location.getLongitude() + " accuracy=" + location.getAccuracy() + " provider=" +location.getProvider());
75
76	if (location.getProvider().equals("gps") && location.getAccuracy() > 100) //if we have a gps provider lets wait for a more precise fix
77	return;
78
79	locManager.removeUpdates(this);
80	hndl.sendEmptyMessage(TrainInfoList.GOTLOCATION);
81
82	//ToDo: to be nice put the api key into the request
83	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";
84	//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";
85
86	try {
87	String data = DownloadUtil.getContent(urlSource, 30000, "UTF-8");
88	StringBuilder builder = new StringBuilder(data);
89
90	while (builder.charAt(0) != '{')
91	builder.deleteCharAt(0);
92	while (builder.charAt(builder.length()-1) != '}')
93	builder.deleteCharAt(builder.length()-1);
94
95	JSONObject json = new JSONObject(builder.toString());
96	// now have some fun with the results...
97	JSONArray res = json.getJSONArray("results");
98
99	Location tmpLocation = new Location("gps");
100	stationList.clear();
101
102	for (int i=0; i<res.length(); i++) {
103	JSONObject jsonStation = res.getJSONObject(i);
104
105	double lat = jsonStation.getDouble("lat");
106	double lng = jsonStation.getDouble("lng");
107	String title = jsonStation.getString("title");
108	String addr = jsonStation.getString("streetAddress");
109	tmpLocation.setLatitude(lat);
110	tmpLocation.setLongitude(lng);
111
112	float distance = location.distanceTo(tmpLocation);
113
114	stationList.add( new StationBean(title,lat,lng,(int)distance,addr) );
115
116	Log.e("Location", title + " " + lat +"," + lng);
117	}
118	hndl.sendEmptyMessage(TrainInfoList.GOTSTATIONLIST);
119
120	} catch (Exception e) {
121	Log.e("Location","Location",e);
122	hndl.sendEmptyMessage(TrainInfoList.LOOKUPSTATIONFAILED);
123	}
124
125	}
126
127
128	@Override
129	public void onProviderDisabled(String provider) {
130	// TODO Auto-generated method stub
131
132	}
133
134
135	@Override
136	public void onProviderEnabled(String provider) {
137	// TODO Auto-generated method stub
138
139	}
140
141
142	@Override
143	public void onStatusChanged(String provider, int status, Bundle extras) {
144	// TODO Auto-generated method stub
145
146	}
147	}