--- android/TrainInfo/src/dk/thoerup/traininfo/StationLocator.java	2009/08/09 09:20:45	240
+++ android/TrainInfo/src/dk/thoerup/traininfo/LocationLookup.java	2010/09/28 15:30:13	1143
@@ -1,141 +1,157 @@
 package dk.thoerup.traininfo;
 
-import java.io.BufferedReader;
-import java.io.InputStreamReader;
-import java.net.URL;
-import java.net.URLConnection;
-import java.util.ArrayList;
 import java.util.List;
 
-import org.json.JSONArray;
-import org.json.JSONObject;
-
-import dk.thoerup.traininfo.util.DownloadUtil;
-
 import android.content.Context;
-import android.location.Criteria;
+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.util.Log;
 
-public class StationLocator implements LocationListener{
 
-	LocationManager locManager;
-	Context cntx;
-	Handler hndl;
+public class LocationLookup implements LocationListener, GpsStatus.Listener {
+	
+	public enum LookupStates {
+		GOTLOCATION,
+		NOPROVIDER,
+		STARTED,
+		IDLE
+	}
 
-	ArrayList<StationBean> stationList = new ArrayList<StationBean>();
-	List<StationBean> safeStationList = java.util.Collections.unmodifiableList(stationList);
+	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 StationLocator(Context c, Handler h) {
+	public LocationLookup(Context c) {
+		state = LookupStates.IDLE;
 		cntx = c;
-		hndl = h;
 	}
 	
-	public List<StationBean> getStations() {
-		return safeStationList;
+	
+	public boolean hasLocation() {
+		return savedLocation != null;
+	}
+	
+	public Location getLocation()
+	{
+		return savedLocation;
+	}
+	
+	public boolean hasGps() {
+		return hasGps;
+	}
+	
+	public int getSatCount() {
+		return satCount;
 	}
 	
-	public void abortLocationListener() {
-		locManager.removeUpdates(this);
+	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() {
-		//http://www.google.com/uds/GlocalSearch?callback=google.search.LocalSearch.RawCompletion&context=1&lstkp=0&rsz=small&hl=en&source=gsc&gss=.com&sig=fadf0e8d483d0f70bea11d5905010a16&q=Train%20station&near=56.377424%2C9.656695&key=ABQIAAAA1XbMiDxx_BTCY2_FkPh06RRaGTYH6UMl8mADNa0YKuWNNa8VNxQEerTAUcfkyrr6OwBovxn7TDAH5Q&v=1.0&nocache=1249640467498
-
+		
+		state = LookupStates.STARTED;
+		
+		hasGps = false;
 		locManager = (LocationManager) cntx.getSystemService(Context.LOCATION_SERVICE);
-		/*//testcode
-		List<String> provs = locManager.getAllProviders();
-		for (String p  : provs) {
-			Log.e("Provider", p);
-		}
-		provs = locManager.getProviders(true);
-		for (String p  : provs) {
-			Log.e("ActiveProvider", p);
-		}
-		*/
-		Criteria c = new Criteria();
-		c.setAccuracy(Criteria.ACCURACY_FINE);
-		String bestProv = locManager.getBestProvider(c, true);
-		Log.e("BestProvider", bestProv);
+		satCount = 0;
+		
+		startTime = android.os.SystemClock.elapsedRealtime(); 
 
-		if (bestProv != null) {
-			locManager.requestLocationUpdates(bestProv, 0, 0, this);
+		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(TrainInfoList.NOPROVIDER);
+			//hndl.sendEmptyMessage(StationList.NOPROVIDER);
+			state = LookupStates.NOPROVIDER;
+			
 		}
 	}
 	@Override
-	public void onLocationChanged(Location location) {
+	public void onLocationChanged(Location location) {		
 		Log.i("Location", "Got location fix " + location.getLatitude() + ", " + location.getLongitude() + " accuracy=" + location.getAccuracy() + " provider=" +location.getProvider());
-
-		if (location.getProvider().equals("gps") && location.getAccuracy() > 100) //if we have a gps provider lets wait for a more precise fix
-			return;
-
-		locManager.removeUpdates(this);
-		hndl.sendEmptyMessage(TrainInfoList.GOTLOCATION);
 		
-		//ToDo: to be nice put the api key into the request
-		String urlSource = "http://www.google.com/uds/GlocalSearch?callback=google.search.LocalSearch.RawCompletion&context=1&q=Train%20station&near=" + location.getLatitude() + "%2C" + location.getLongitude() + "&v=1.0";
-		//String urlSource = "http://www.google.com/uds/GlocalSearch?callback=google.search.LocalSearch.RawCompletion&context=1&q=Train%20station&near=56.2%2C9.0&v=1.0";
-
-		try {
-			String data = DownloadUtil.getContent(urlSource, 30000, "UTF-8");
-			StringBuilder builder = new StringBuilder(data);
-
-			while (builder.charAt(0) != '{')
-				builder.deleteCharAt(0);
-			while (builder.charAt(builder.length()-1) != '}')
-				builder.deleteCharAt(builder.length()-1);
-
-			JSONObject json = new JSONObject(builder.toString());
-			// now have some fun with the results...
-			JSONArray res = json.getJSONArray("results");
 
-			Location tmpLocation = new Location("gps");
-			stationList.clear();
-			
-			for (int i=0; i<res.length(); i++) {
-				JSONObject jsonStation = res.getJSONObject(i);
-
-				double lat = jsonStation.getDouble("lat");
-				double lng = jsonStation.getDouble("lng");
-				String title = jsonStation.getString("title");
-				String addr = jsonStation.getString("streetAddress");
-				tmpLocation.setLatitude(lat);
-				tmpLocation.setLongitude(lng);
-
-				float distance = location.distanceTo(tmpLocation);
+		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
+			}
 
-				stationList.add( new StationBean(title,lat,lng,(int)distance,addr) );
+		}
+		stopSearch();
+		state = LookupStates.GOTLOCATION;
 
-				Log.e("Location", title + " " + lat +"," + lng);
+	}
+	
+	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;
 			}
-			hndl.sendEmptyMessage(TrainInfoList.GOTSTATIONLIST);
-
-		} catch (Exception e) {
-			Log.e("Location","Location",e);
-			hndl.sendEmptyMessage(TrainInfoList.LOOKUPSTATIONFAILED);
 		}
-		
+	}
+	
+	public void stopSearch()
+	{
+		if (state == LookupStates.STARTED) {
+			state = LookupStates.IDLE;
+			locManager.removeGpsStatusListener(this);
+			locManager.removeUpdates(this);
+		}
 	}
 
 
 	@Override
 	public void onProviderDisabled(String provider) {
-		// TODO Auto-generated method stub
-
 	}
 
 
 	@Override
 	public void onProviderEnabled(String provider) {
-		// TODO Auto-generated method stub
-
 	}
 
 
@@ -144,4 +160,19 @@
 		// 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;
+		}
+		
+	}
 }