thoerup/traininfo/LocationLookup.java

package dk.thoerup.traininfo;

import java.util.List;

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 LocationLookup implements LocationListener{

        LocationManager locManager;
        Context cntx;
        Handler hndl;

        Location savedLocation = null;
        
        boolean isSearching = false;
        boolean hasGps;

        public LocationLookup(Context c, Handler h) {
                cntx = c;
                hndl = h;
        }
        
        
        public boolean hasLocation() {
                return savedLocation != null;
        }
        
        public Location getLocation()
        {
                return savedLocation;
        }

        public void locateStations() {
                
                isSearching = true;
                
                hasGps = false;
                locManager = (LocationManager) cntx.getSystemService(Context.LOCATION_SERVICE);

                List<String> providers = locManager.getProviders(true);         
                
                if (providers.size() > 0) {
                        for(String provider : providers) {
                                Log.i("Provider", ""+provider);
                                if (provider.equalsIgnoreCase("gps"))
                                        hasGps = true;
                                locManager.requestLocationUpdates(provider, 0, 0, this);
                        }
                } else {
                        // message that no suitable provider was found
                        hndl.sendEmptyMessage(StationList.NOPROVIDER);
                }
        }
        @Override
        public void onLocationChanged(Location location) {
                if (isSearching == false)
                        return;
                
                Log.i("Location", "Got location fix " + location.getLatitude() + ", " + location.getLongitude() + " accuracy=" + location.getAccuracy() + " provider=" +location.getProvider());
                

                if (savedLocation == null || location.getAccuracy() < savedLocation.getAccuracy())
                        savedLocation = new Location(location); //save a copy
                
                if (hasGps) {
                        if (!location.getProvider().equals("gps")) {
                                return; // at least give the gps a chance
                        } else if (location.getAccuracy() > 256) {
                                return; //if we have a gps provider lets wait for a more precise fix
                        }

                }
                stopSearch();
                hndl.sendEmptyMessage(StationList.GOTLOCATION);
        }
        
        public void stopSearch()
        {
                if (isSearching) {
                        isSearching = false;
                        locManager.removeUpdates(this);
                }
        }


        @Override
        public void onProviderDisabled(String provider) {
        }


        @Override
        public void onProviderEnabled(String provider) {
        }


        @Override
        public void onStatusChanged(String provider, int status, Bundle extras) {
                // TODO Auto-generated method stub

        }
}
1	torben	237	package dk.thoerup.traininfo;
2
3			import java.util.List;
4
5			import android.content.Context;
6			import android.location.Criteria;
7			import android.location.Location;
8			import android.location.LocationListener;
9			import android.location.LocationManager;
10			import android.os.Bundle;
11			import android.os.Handler;
12			import android.util.Log;
13
14
15	torben	319	public class LocationLookup implements LocationListener{
16
17	torben	237	LocationManager locManager;
18			Context cntx;
19			Handler hndl;
20
21	torben	241	Location savedLocation = null;
22	torben	286
23	torben	336	boolean isSearching = false;
24	torben	286	boolean hasGps;
25	torben	241
26	torben	319	public LocationLookup(Context c, Handler h) {
27	torben	237	cntx = c;
28			hndl = h;
29			}
30
31	torben	285
32			public boolean hasLocation() {
33			return savedLocation != null;
34			}
35	torben	319
36			public Location getLocation()
37			{
38			return savedLocation;
39			}
40	torben	237
41			public void locateStations() {
42	torben	336
43			isSearching = true;
44
45	torben	286	hasGps = false;
46	torben	237	locManager = (LocationManager) cntx.getSystemService(Context.LOCATION_SERVICE);
47	torben	286
48	torben	288	List<String> providers = locManager.getProviders(true);
49	torben	241
50	torben	286	if (providers.size() > 0) {
51			for(String provider : providers) {
52			Log.i("Provider", ""+provider);
53			if (provider.equalsIgnoreCase("gps"))
54			hasGps = true;
55			locManager.requestLocationUpdates(provider, 0, 0, this);
56			}
57	torben	237	} else {
58			// message that no suitable provider was found
59	torben	336	hndl.sendEmptyMessage(StationList.NOPROVIDER);
60	torben	237	}
61			}
62			@Override
63			public void onLocationChanged(Location location) {
64	torben	336	if (isSearching == false)
65			return;
66
67	torben	237	Log.i("Location", "Got location fix " + location.getLatitude() + ", " + location.getLongitude() + " accuracy=" + location.getAccuracy() + " provider=" +location.getProvider());
68	torben	336
69	torben	237
70	torben	286	if (savedLocation == null \|\| location.getAccuracy() < savedLocation.getAccuracy())
71			savedLocation = new Location(location); //save a copy
72	torben	241
73	torben	286	if (hasGps) {
74			if (!location.getProvider().equals("gps")) {
75			return; // at least give the gps a chance
76	torben	341	} else if (location.getAccuracy() > 256) {
77	torben	286	return; //if we have a gps provider lets wait for a more precise fix
78			}
79	torben	237
80	torben	286	}
81	torben	336	stopSearch();
82			hndl.sendEmptyMessage(StationList.GOTLOCATION);
83	torben	241	}
84	torben	336
85			public void stopSearch()
86			{
87			if (isSearching) {
88			isSearching = false;
89			locManager.removeUpdates(this);
90			}
91			}
92	torben	319
93	torben	237
94			@Override
95			public void onProviderDisabled(String provider) {
96			}
97
98
99			@Override
100			public void onProviderEnabled(String provider) {
101			}
102
103
104			@Override
105			public void onStatusChanged(String provider, int status, Bundle extras) {
106			// TODO Auto-generated method stub
107
108			}
109			}