thoerup/traininfo/LocationLookup.java

package dk.thoerup.traininfo;


import android.content.Context;
import android.content.SharedPreferences;
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.preference.PreferenceManager;
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(); 
                
                boolean hasProvider = false;
                
                SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(cntx);
                String networkPref = prefs.getString("location", "GPS"); //default value is gps
                
                if (networkPref.equals("GPS")) {
                        if (locManager.isProviderEnabled(LocationManager.GPS_PROVIDER)) {
                                locManager.addGpsStatusListener(this);
                                locManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0, 0, this);
                                
                                hasGps = true;
                                hasProvider = true;
                        }
                }
                
                if (locManager.isProviderEnabled(LocationManager.NETWORK_PROVIDER)) {
                        locManager.requestLocationUpdates(LocationManager.NETWORK_PROVIDER, 0, 0, this);
                        hasProvider = true;                     
                }
                
                        
                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
4	import android.content.Context;
5	import android.content.SharedPreferences;
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.preference.PreferenceManager;
13	import android.util.Log;
14
15
16	public class LocationLookup implements LocationListener, GpsStatus.Listener {
17
18	public enum LookupStates {
19	GOTLOCATION,
20	NOPROVIDER,
21	STARTED,
22	IDLE
23	}
24
25	private LocationManager locManager;
26	private Context cntx;
27
28	private Location savedLocation = null;
29	private int satCount;
30
31	private boolean hasGps;
32
33	private LookupStates state;
34
35	private long startTime;
36
37	public LocationLookup(Context c) {
38	state = LookupStates.IDLE;
39	cntx = c;
40	}
41
42
43	public boolean hasLocation() {
44	return savedLocation != null;
45	}
46
47	public Location getLocation()
48	{
49	return savedLocation;
50	}
51
52	public boolean hasGps() {
53	return hasGps;
54	}
55
56	public int getSatCount() {
57	return satCount;
58	}
59
60	public LookupStates getState() {
61	return state;
62	}
63
64
65	public long elapsedTime() {
66	long now = android.os.SystemClock.elapsedRealtime();
67
68	return now - startTime;
69	}
70
71	public void locateStations() {
72
73	state = LookupStates.STARTED;
74
75	hasGps = false;
76	locManager = (LocationManager) cntx.getSystemService(Context.LOCATION_SERVICE);
77	satCount = 0;
78
79	startTime = android.os.SystemClock.elapsedRealtime();
80
81	boolean hasProvider = false;
82
83	SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(cntx);
84	String networkPref = prefs.getString("location", "GPS"); //default value is gps
85
86	if (networkPref.equals("GPS")) {
87	if (locManager.isProviderEnabled(LocationManager.GPS_PROVIDER)) {
88	locManager.addGpsStatusListener(this);
89	locManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0, 0, this);
90
91	hasGps = true;
92	hasProvider = true;
93	}
94	}
95
96	if (locManager.isProviderEnabled(LocationManager.NETWORK_PROVIDER)) {
97	locManager.requestLocationUpdates(LocationManager.NETWORK_PROVIDER, 0, 0, this);
98	hasProvider = true;
99	}
100
101
102	if (hasProvider == false) {
103	// message that no suitable provider was found
104	//hndl.sendEmptyMessage(StationList.NOPROVIDER);
105	state = LookupStates.NOPROVIDER;
106
107	}
108	}
109	@Override
110	public void onLocationChanged(Location location) {
111	Log.i("Location", "Got location fix " + location.getLatitude() + ", " + location.getLongitude() + " accuracy=" + location.getAccuracy() + " provider=" +location.getProvider());
112
113
114	if (savedLocation == null \|\| location.getAccuracy() < savedLocation.getAccuracy())
115	savedLocation = new Location(location); //save a copy
116
117	if (hasGps) {
118	if (!location.getProvider().equals("gps")) {
119	return; // at least give the gps a chance
120	} else if (location.getAccuracy() > 512) {
121	return; //if we have a gps provider lets wait for a more precise fix
122	}
123
124	}
125	stopSearch();
126	state = LookupStates.GOTLOCATION;
127
128	}
129
130
131	public void stopSearch()
132	{
133	if (state == LookupStates.STARTED) {
134	state = LookupStates.IDLE;
135	locManager.removeGpsStatusListener(this);
136	locManager.removeUpdates(this);
137	}
138	}
139
140
141	@Override
142	public void onProviderDisabled(String provider) {
143	}
144
145
146	@Override
147	public void onProviderEnabled(String provider) {
148	}
149
150
151	@Override
152	public void onStatusChanged(String provider, int status, Bundle extras) {
153	// TODO Auto-generated method stub
154
155	}
156
157
158	@Override //GpsStatus.Listener
159	public void onGpsStatusChanged(int event) {
160	if (event == GpsStatus.GPS_EVENT_SATELLITE_STATUS) {
161	int count = 0;
162	GpsStatus status = locManager.getGpsStatus(null);
163	for (GpsSatellite sat : status.getSatellites()) {
164	count ++;
165	}
166
167	satCount = count;
168	}
169
170	}
171	}