thoerup/traininfo/LocationLookup.java

package dk.thoerup.traininfo;

import java.util.List;

import android.content.Context;
import android.location.GpsSatellite;
import android.location.GpsStatus;
import android.location.Location;
import android.location.LocationListener;
import android.location.LocationManager;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.util.Log;


public class LocationLookup implements LocationListener, GpsStatus.Listener {

        LocationManager locManager;
        Context cntx;
        Handler hndl;

        Location lastKnownLocation = null;
        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 Location getLastKnownLocation() {
                return lastKnownLocation;
        }

        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")) {
                                        locManager.addGpsStatusListener(this);
                                        hasGps = true;                                  
                                }

                                locManager.requestLocationUpdates(provider, 0, 0, this);
                                Location tmpLastKnown = locManager.getLastKnownLocation(provider);
                                if (tmpLastKnown != null) {
                                        saveLastKnownLocation(tmpLastKnown);
                                }
                        }
                } else {
                        // message that no suitable provider was found
                        //hndl.sendEmptyMessage(StationList.NOPROVIDER);
                        hndl.sendEmptyMessage(StationList.LookupStates.NOPROVIDER.ordinal());
                        
                }
        }
        @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() > 512) {
                                return; //if we have a gps provider lets wait for a more precise fix
                        }

                }
                stopSearch();
                hndl.sendEmptyMessage(StationList.LookupStates.GOTLOCATION.ordinal());
        }
        
        private void saveLastKnownLocation(Location loc) {
                if (lastKnownLocation == null) { 
                        lastKnownLocation = loc; 
                } else {
                        if (loc.getTime() > lastKnownLocation.getTime()) {//if loc is more recent than saved
                                lastKnownLocation = loc;
                        }
                }
        }
        
        public void stopSearch()
        {
                if (isSearching) {
                        isSearching = false;
                        locManager.removeGpsStatusListener(this);
                        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

        }


        @Override //GpsStatus.Listener
        public void onGpsStatusChanged(int event) {
                if (event == GpsStatus.GPS_EVENT_SATELLITE_STATUS) {
                        int count = 0;
                        GpsStatus status =  locManager.getGpsStatus(null);
                        for (GpsSatellite sat : status.getSatellites()) {
                                count ++;
                        }
                        
                        Message msg = new Message();
                        msg.what = StationList.LookupStates.GPS_SAT_COUNT.ordinal();
                        msg.arg1 = count;
                        hndl.sendMessage(msg);
                }
                
        }
}
1	torben	237	package dk.thoerup.traininfo;
2
3			import java.util.List;
4
5			import android.content.Context;
6	torben	1142	import android.location.GpsSatellite;
7			import android.location.GpsStatus;
8	torben	237	import android.location.Location;
9			import android.location.LocationListener;
10			import android.location.LocationManager;
11			import android.os.Bundle;
12			import android.os.Handler;
13	torben	1142	import android.os.Message;
14	torben	237	import android.util.Log;
15
16
17	torben	1142	public class LocationLookup implements LocationListener, GpsStatus.Listener {
18	torben	319
19	torben	237	LocationManager locManager;
20			Context cntx;
21			Handler hndl;
22
23	torben	488	Location lastKnownLocation = null;
24	torben	241	Location savedLocation = null;
25	torben	286
26	torben	336	boolean isSearching = false;
27	torben	286	boolean hasGps;
28	torben	241
29	torben	319	public LocationLookup(Context c, Handler h) {
30	torben	237	cntx = c;
31			hndl = h;
32			}
33
34	torben	285
35			public boolean hasLocation() {
36			return savedLocation != null;
37			}
38	torben	319
39			public Location getLocation()
40			{
41			return savedLocation;
42			}
43	torben	488
44			public Location getLastKnownLocation() {
45			return lastKnownLocation;
46			}
47	torben	237
48			public void locateStations() {
49	torben	336
50			isSearching = true;
51
52	torben	286	hasGps = false;
53	torben	237	locManager = (LocationManager) cntx.getSystemService(Context.LOCATION_SERVICE);
54	torben	286
55	torben	288	List<String> providers = locManager.getProviders(true);
56	torben	241
57	torben	286	if (providers.size() > 0) {
58			for(String provider : providers) {
59			Log.i("Provider", ""+provider);
60	torben	1142	if (provider.equalsIgnoreCase("gps")) {
61			locManager.addGpsStatusListener(this);
62			hasGps = true;
63			}
64
65	torben	286	locManager.requestLocationUpdates(provider, 0, 0, this);
66	torben	570	Location tmpLastKnown = locManager.getLastKnownLocation(provider);
67			if (tmpLastKnown != null) {
68			saveLastKnownLocation(tmpLastKnown);
69			}
70	torben	286	}
71	torben	237	} else {
72			// message that no suitable provider was found
73	torben	1142	//hndl.sendEmptyMessage(StationList.NOPROVIDER);
74			hndl.sendEmptyMessage(StationList.LookupStates.NOPROVIDER.ordinal());
75
76	torben	237	}
77			}
78			@Override
79			public void onLocationChanged(Location location) {
80	torben	336	if (isSearching == false)
81			return;
82
83	torben	237	Log.i("Location", "Got location fix " + location.getLatitude() + ", " + location.getLongitude() + " accuracy=" + location.getAccuracy() + " provider=" +location.getProvider());
84	torben	336
85	torben	237
86	torben	286	if (savedLocation == null \|\| location.getAccuracy() < savedLocation.getAccuracy())
87			savedLocation = new Location(location); //save a copy
88	torben	241
89	torben	286	if (hasGps) {
90			if (!location.getProvider().equals("gps")) {
91			return; // at least give the gps a chance
92	torben	948	} else if (location.getAccuracy() > 512) {
93	torben	286	return; //if we have a gps provider lets wait for a more precise fix
94			}
95	torben	237
96	torben	286	}
97	torben	336	stopSearch();
98	torben	1142	hndl.sendEmptyMessage(StationList.LookupStates.GOTLOCATION.ordinal());
99	torben	241	}
100	torben	336
101	torben	488	private void saveLastKnownLocation(Location loc) {
102			if (lastKnownLocation == null) {
103			lastKnownLocation = loc;
104			} else {
105			if (loc.getTime() > lastKnownLocation.getTime()) {//if loc is more recent than saved
106			lastKnownLocation = loc;
107			}
108			}
109			}
110
111	torben	336	public void stopSearch()
112			{
113			if (isSearching) {
114			isSearching = false;
115	torben	1142	locManager.removeGpsStatusListener(this);
116	torben	336	locManager.removeUpdates(this);
117			}
118			}
119	torben	319
120	torben	237
121			@Override
122			public void onProviderDisabled(String provider) {
123			}
124
125
126			@Override
127			public void onProviderEnabled(String provider) {
128			}
129
130
131			@Override
132			public void onStatusChanged(String provider, int status, Bundle extras) {
133			// TODO Auto-generated method stub
134
135			}
136	torben	1142
137
138			@Override //GpsStatus.Listener
139			public void onGpsStatusChanged(int event) {
140			if (event == GpsStatus.GPS_EVENT_SATELLITE_STATUS) {
141			int count = 0;
142			GpsStatus status = locManager.getGpsStatus(null);
143			for (GpsSatellite sat : status.getSatellites()) {
144			count ++;
145			}
146
147			Message msg = new Message();
148			msg.what = StationList.LookupStates.GPS_SAT_COUNT.ordinal();
149			msg.arg1 = count;
150			hndl.sendMessage(msg);
151			}
152
153			}
154	torben	237	}