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

        }
        
        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 (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	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.util.Log;
13
14
15	torben	1142	public class LocationLookup implements LocationListener, GpsStatus.Listener {
16	torben	1143
17			public enum LookupStates {
18			GOTLOCATION,
19			NOPROVIDER,
20			STARTED,
21			IDLE
22			}
23	torben	319
24	torben	1143	private LocationManager locManager;
25			private Context cntx;
26	torben	237
27	torben	1143	private Location lastKnownLocation = null;
28			private Location savedLocation = null;
29			private int satCount;
30	torben	286
31	torben	1143	private boolean hasGps;
32
33			private LookupStates state;
34
35			private long startTime;
36	torben	241
37	torben	1143	public LocationLookup(Context c) {
38			state = LookupStates.IDLE;
39	torben	237	cntx = c;
40			}
41
42	torben	285
43			public boolean hasLocation() {
44			return savedLocation != null;
45			}
46	torben	319
47			public Location getLocation()
48			{
49			return savedLocation;
50			}
51	torben	488
52	torben	1143	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	torben	488	public Location getLastKnownLocation() {
65			return lastKnownLocation;
66			}
67	torben	1143
68			public long elapsedTime() {
69			long now = android.os.SystemClock.elapsedRealtime();
70
71			return now - startTime;
72			}
73	torben	237
74			public void locateStations() {
75	torben	336
76	torben	1143	state = LookupStates.STARTED;
77	torben	336
78	torben	286	hasGps = false;
79	torben	237	locManager = (LocationManager) cntx.getSystemService(Context.LOCATION_SERVICE);
80	torben	1143	satCount = 0;
81
82			startTime = android.os.SystemClock.elapsedRealtime();
83	torben	286
84	torben	288	List<String> providers = locManager.getProviders(true);
85	torben	241
86	torben	286	if (providers.size() > 0) {
87			for(String provider : providers) {
88			Log.i("Provider", ""+provider);
89	torben	1142	if (provider.equalsIgnoreCase("gps")) {
90			locManager.addGpsStatusListener(this);
91			hasGps = true;
92			}
93
94	torben	286	locManager.requestLocationUpdates(provider, 0, 0, this);
95	torben	570	Location tmpLastKnown = locManager.getLastKnownLocation(provider);
96			if (tmpLastKnown != null) {
97			saveLastKnownLocation(tmpLastKnown);
98			}
99	torben	286	}
100	torben	237	} else {
101			// message that no suitable provider was found
102	torben	1142	//hndl.sendEmptyMessage(StationList.NOPROVIDER);
103	torben	1143	state = LookupStates.NOPROVIDER;
104	torben	1142
105	torben	237	}
106			}
107			@Override
108	torben	1143	public void onLocationChanged(Location location) {
109	torben	237	Log.i("Location", "Got location fix " + location.getLatitude() + ", " + location.getLongitude() + " accuracy=" + location.getAccuracy() + " provider=" +location.getProvider());
110	torben	336
111	torben	237
112	torben	286	if (savedLocation == null \|\| location.getAccuracy() < savedLocation.getAccuracy())
113			savedLocation = new Location(location); //save a copy
114	torben	241
115	torben	286	if (hasGps) {
116			if (!location.getProvider().equals("gps")) {
117			return; // at least give the gps a chance
118	torben	948	} else if (location.getAccuracy() > 512) {
119	torben	286	return; //if we have a gps provider lets wait for a more precise fix
120			}
121	torben	237
122	torben	286	}
123	torben	336	stopSearch();
124	torben	1143	state = LookupStates.GOTLOCATION;
125
126	torben	241	}
127	torben	336
128	torben	488	private void saveLastKnownLocation(Location loc) {
129			if (lastKnownLocation == null) {
130			lastKnownLocation = loc;
131			} else {
132			if (loc.getTime() > lastKnownLocation.getTime()) {//if loc is more recent than saved
133			lastKnownLocation = loc;
134			}
135			}
136			}
137
138	torben	336	public void stopSearch()
139			{
140	torben	1143	if (state == LookupStates.STARTED) {
141			state = LookupStates.IDLE;
142	torben	1142	locManager.removeGpsStatusListener(this);
143	torben	336	locManager.removeUpdates(this);
144			}
145			}
146	torben	319
147	torben	237
148			@Override
149			public void onProviderDisabled(String provider) {
150			}
151
152
153			@Override
154			public void onProviderEnabled(String provider) {
155			}
156
157
158			@Override
159			public void onStatusChanged(String provider, int status, Bundle extras) {
160			// TODO Auto-generated method stub
161
162			}
163	torben	1142
164
165			@Override //GpsStatus.Listener
166			public void onGpsStatusChanged(int event) {
167			if (event == GpsStatus.GPS_EVENT_SATELLITE_STATUS) {
168			int count = 0;
169			GpsStatus status = locManager.getGpsStatus(null);
170			for (GpsSatellite sat : status.getSatellites()) {
171			count ++;
172	torben	1143	}
173	torben	1142
174	torben	1143	satCount = count;
175	torben	1142	}
176
177			}
178	torben	237	}