--- android/TrainInfo/src/dk/thoerup/traininfo/LocationLookup.java	2009/10/29 13:42:57	488
+++ android/TrainInfo/src/dk/thoerup/traininfo/LocationLookup.java	2011/05/04 20:25:15	1446
@@ -1,31 +1,42 @@
 package dk.thoerup.traininfo;
 
-import java.util.List;
 
 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.os.Handler;
+import android.preference.PreferenceManager;
 import android.util.Log;
 
 
-public class LocationLookup implements LocationListener{
+public class LocationLookup implements LocationListener, GpsStatus.Listener {
+	
+	public enum LookupStates {
+		GOTLOCATION,
+		NOPROVIDER,
+		STARTED,
+		IDLE
+	}
 
-	LocationManager locManager;
-	Context cntx;
-	Handler hndl;
+	private LocationManager locManager;
+	private Context cntx;
 
-	Location lastKnownLocation = null;
-	Location savedLocation = null;
+	private Location savedLocation = null;
+	private int satCount;
+	
+	private boolean hasGps;
+	
+	private LookupStates state;
 	
-	boolean isSearching = false;
-	boolean hasGps;
+	private long startTime;
 
-	public LocationLookup(Context c, Handler h) {
+	public LocationLookup(Context c) {
+		state = LookupStates.IDLE;
 		cntx = c;
-		hndl = h;
 	}
 	
 	
@@ -38,38 +49,65 @@
 		return savedLocation;
 	}
 	
-	public Location getLastKnownLocation() {
-		return lastKnownLocation;
+	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() {
 		
-		isSearching = true;
+		state = LookupStates.STARTED;
 		
 		hasGps = false;
 		locManager = (LocationManager) cntx.getSystemService(Context.LOCATION_SERVICE);
-
-		List<String> providers = locManager.getProviders(true);		
+		satCount = 0;
+		
+		startTime = android.os.SystemClock.elapsedRealtime(); 
+		
+		boolean hasProvider = false;
 		
-		if (providers.size() > 0) {
-			for(String provider : providers) {
-				Log.i("Provider", ""+provider);
-				if (provider.equalsIgnoreCase("gps"))
-					hasGps = true;
-				locManager.requestLocationUpdates(provider, 0, 0, this);
+		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);
 				
-				saveLastKnownLocation(locManager.getLastKnownLocation(provider));
+				hasGps = true;
+				hasProvider = true;
 			}
-		} else {
+		}
+		
+		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);
+			//hndl.sendEmptyMessage(StationList.NOPROVIDER);
+			state = LookupStates.NOPROVIDER;
+			
 		}
 	}
 	@Override
-	public void onLocationChanged(Location location) {
-		if (isSearching == false)
-			return;
-		
+	public void onLocationChanged(Location location) {		
 		Log.i("Location", "Got location fix " + location.getLatitude() + ", " + location.getLongitude() + " accuracy=" + location.getAccuracy() + " provider=" +location.getProvider());
 		
 
@@ -79,29 +117,22 @@
 		if (hasGps) {
 			if (!location.getProvider().equals("gps")) {
 				return; // at least give the gps a chance
-			} else if (location.getAccuracy() > 256) {
+			} else if (location.getAccuracy() > 512) {
 				return; //if we have a gps provider lets wait for a more precise fix
 			}
 
 		}
 		stopSearch();
-		hndl.sendEmptyMessage(StationList.GOTLOCATION);
+		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 (isSearching) {
-			isSearching = false;
+		if (state == LookupStates.STARTED) {
+			state = LookupStates.IDLE;
+			locManager.removeGpsStatusListener(this);
 			locManager.removeUpdates(this);
 		}
 	}
@@ -122,4 +153,19 @@
 		// 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;
+		}
+		
+	}
 }