thoerup/traininfo/LocationLookup.java

package dk.thoerup.traininfo;

import java.util.List;

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