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);         
                
                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);
                        }
                } 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;

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