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.util.Log;


public class LocationLookup implements LocationListener, GpsStatus.Listener {
        
        public enum LookupStates {
                GOTLOCATION,
                NOPROVIDER,
                STARTED,
                IDLE
        }

        private LocationManager locManager;
        private Context cntx;

        private Location savedLocation = null;
        private int satCount;
        
        private boolean hasGps;
        
        private LookupStates state;
        
        private long startTime;

        public LocationLookup(Context c) {
                state = LookupStates.IDLE;
                cntx = c;
        }
        
        
        public boolean hasLocation() {
                return savedLocation != null;
        }
        
        public Location getLocation()
        {
                return savedLocation;
        }
        
        public boolean hasGps() {
                return hasGps;
        }
        
        public int getSatCount() {
                return satCount;
        }
        
        public LookupStates getState() {
                return state;
        }
        
        
        public long elapsedTime() {
                long now = android.os.SystemClock.elapsedRealtime();
                
                return now - startTime;
        }

        public void locateStations() {
                
                state = LookupStates.STARTED;
                
                hasGps = false;
                locManager = (LocationManager) cntx.getSystemService(Context.LOCATION_SERVICE);
                satCount = 0;
                
                startTime = android.os.SystemClock.elapsedRealtime(); 

                List<String> providers = locManager.getProviders(true);         
                
                boolean hasProvider = false;
                
                for(String provider : providers) {
                        if (provider.equals( LocationManager.PASSIVE_PROVIDER)) {
                                continue;
                        }
                        
                        Log.i("Provider", ""+provider);
                        hasProvider = true;
                        if (provider.equalsIgnoreCase("gps")) {
                                locManager.addGpsStatusListener(this);
                                hasGps = true;                                  
                        }

                        locManager.requestLocationUpdates(provider, 0, 0, this);
                }
                        
                if (hasProvider == false) {
                        // message that no suitable provider was found
                        //hndl.sendEmptyMessage(StationList.NOPROVIDER);
                        state = LookupStates.NOPROVIDER;
                        
                }
        }
        @Override
        public void onLocationChanged(Location location) {              
                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();
                state = LookupStates.GOTLOCATION;

        }
        
        
        public void stopSearch()
        {
                if (state == LookupStates.STARTED) {
                        state = LookupStates.IDLE;
                        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 ++;
                        }                       
                        
                        satCount = count;
                }
                
        }
}
1	package dk.thoerup.traininfo;
2
3	import java.util.List;
4
5	import android.content.Context;
6	import android.location.GpsSatellite;
7	import android.location.GpsStatus;
8	import android.location.Location;
9	import android.location.LocationListener;
10	import android.location.LocationManager;
11	import android.os.Bundle;
12	import android.util.Log;
13
14
15	public class LocationLookup implements LocationListener, GpsStatus.Listener {
16
17	public enum LookupStates {
18	GOTLOCATION,
19	NOPROVIDER,
20	STARTED,
21	IDLE
22	}
23
24	private LocationManager locManager;
25	private Context cntx;
26
27	private Location savedLocation = null;
28	private int satCount;
29
30	private boolean hasGps;
31
32	private LookupStates state;
33
34	private long startTime;
35
36	public LocationLookup(Context c) {
37	state = LookupStates.IDLE;
38	cntx = c;
39	}
40
41
42	public boolean hasLocation() {
43	return savedLocation != null;
44	}
45
46	public Location getLocation()
47	{
48	return savedLocation;
49	}
50
51	public boolean hasGps() {
52	return hasGps;
53	}
54
55	public int getSatCount() {
56	return satCount;
57	}
58
59	public LookupStates getState() {
60	return state;
61	}
62
63
64	public long elapsedTime() {
65	long now = android.os.SystemClock.elapsedRealtime();
66
67	return now - startTime;
68	}
69
70	public void locateStations() {
71
72	state = LookupStates.STARTED;
73
74	hasGps = false;
75	locManager = (LocationManager) cntx.getSystemService(Context.LOCATION_SERVICE);
76	satCount = 0;
77
78	startTime = android.os.SystemClock.elapsedRealtime();
79
80	List<String> providers = locManager.getProviders(true);
81
82	boolean hasProvider = false;
83
84	for(String provider : providers) {
85	if (provider.equals( LocationManager.PASSIVE_PROVIDER)) {
86	continue;
87	}
88
89	Log.i("Provider", ""+provider);
90	hasProvider = true;
91	if (provider.equalsIgnoreCase("gps")) {
92	locManager.addGpsStatusListener(this);
93	hasGps = true;
94	}
95
96	locManager.requestLocationUpdates(provider, 0, 0, this);
97	}
98
99	if (hasProvider == false) {
100	// message that no suitable provider was found
101	//hndl.sendEmptyMessage(StationList.NOPROVIDER);
102	state = LookupStates.NOPROVIDER;
103
104	}
105	}
106	@Override
107	public void onLocationChanged(Location location) {
108	Log.i("Location", "Got location fix " + location.getLatitude() + ", " + location.getLongitude() + " accuracy=" + location.getAccuracy() + " provider=" +location.getProvider());
109
110
111	if (savedLocation == null \|\| location.getAccuracy() < savedLocation.getAccuracy())
112	savedLocation = new Location(location); //save a copy
113
114	if (hasGps) {
115	if (!location.getProvider().equals("gps")) {
116	return; // at least give the gps a chance
117	} else if (location.getAccuracy() > 512) {
118	return; //if we have a gps provider lets wait for a more precise fix
119	}
120
121	}
122	stopSearch();
123	state = LookupStates.GOTLOCATION;
124
125	}
126
127
128	public void stopSearch()
129	{
130	if (state == LookupStates.STARTED) {
131	state = LookupStates.IDLE;
132	locManager.removeGpsStatusListener(this);
133	locManager.removeUpdates(this);
134	}
135	}
136
137
138	@Override
139	public void onProviderDisabled(String provider) {
140	}
141
142
143	@Override
144	public void onProviderEnabled(String provider) {
145	}
146
147
148	@Override
149	public void onStatusChanged(String provider, int status, Bundle extras) {
150	// TODO Auto-generated method stub
151
152	}
153
154
155	@Override //GpsStatus.Listener
156	public void onGpsStatusChanged(int event) {
157	if (event == GpsStatus.GPS_EVENT_SATELLITE_STATUS) {
158	int count = 0;
159	GpsStatus status = locManager.getGpsStatus(null);
160	for (GpsSatellite sat : status.getSatellites()) {
161	count ++;
162	}
163
164	satCount = count;
165	}
166
167	}
168	}