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package dk.thoerup.traininfo;
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import java.util.List;
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import android.content.Context;
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import android.location.GpsSatellite;
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import android.location.GpsStatus;
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import android.location.Location;
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import android.location.LocationListener;
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import android.location.LocationManager;
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import android.os.Bundle;
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import android.os.Handler;
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import android.os.Message;
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import android.util.Log;
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public class LocationLookup implements LocationListener, GpsStatus.Listener {
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LocationManager locManager;
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Context cntx;
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Handler hndl;
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Location lastKnownLocation = null;
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Location savedLocation = null;
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boolean isSearching = false;
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boolean hasGps;
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public LocationLookup(Context c, Handler h) {
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cntx = c;
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hndl = h;
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}
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public boolean hasLocation() {
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return savedLocation != null;
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}
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public Location getLocation()
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{
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return savedLocation;
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}
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public Location getLastKnownLocation() {
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return lastKnownLocation;
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}
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public void locateStations() {
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isSearching = true;
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hasGps = false;
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locManager = (LocationManager) cntx.getSystemService(Context.LOCATION_SERVICE);
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List<String> providers = locManager.getProviders(true);
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if (providers.size() > 0) {
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for(String provider : providers) {
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Log.i("Provider", ""+provider);
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if (provider.equalsIgnoreCase("gps")) {
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locManager.addGpsStatusListener(this);
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hasGps = true;
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}
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locManager.requestLocationUpdates(provider, 0, 0, this);
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Location tmpLastKnown = locManager.getLastKnownLocation(provider);
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if (tmpLastKnown != null) {
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saveLastKnownLocation(tmpLastKnown);
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}
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}
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} else {
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// message that no suitable provider was found
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//hndl.sendEmptyMessage(StationList.NOPROVIDER);
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hndl.sendEmptyMessage(StationList.LookupStates.NOPROVIDER.ordinal());
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}
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}
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@Override
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public void onLocationChanged(Location location) {
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if (isSearching == false)
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return;
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Log.i("Location", "Got location fix " + location.getLatitude() + ", " + location.getLongitude() + " accuracy=" + location.getAccuracy() + " provider=" +location.getProvider());
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if (savedLocation == null || location.getAccuracy() < savedLocation.getAccuracy())
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savedLocation = new Location(location); //save a copy
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if (hasGps) {
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if (!location.getProvider().equals("gps")) {
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return; // at least give the gps a chance
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} else if (location.getAccuracy() > 512) {
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return; //if we have a gps provider lets wait for a more precise fix
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}
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}
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stopSearch();
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hndl.sendEmptyMessage(StationList.LookupStates.GOTLOCATION.ordinal());
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}
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private void saveLastKnownLocation(Location loc) {
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if (lastKnownLocation == null) {
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lastKnownLocation = loc;
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} else {
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if (loc.getTime() > lastKnownLocation.getTime()) {//if loc is more recent than saved
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lastKnownLocation = loc;
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}
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}
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}
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public void stopSearch()
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{
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if (isSearching) {
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isSearching = false;
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locManager.removeGpsStatusListener(this);
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locManager.removeUpdates(this);
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}
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}
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@Override
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public void onProviderDisabled(String provider) {
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}
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@Override
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public void onProviderEnabled(String provider) {
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}
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@Override
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public void onStatusChanged(String provider, int status, Bundle extras) {
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// TODO Auto-generated method stub
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}
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@Override //GpsStatus.Listener
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public void onGpsStatusChanged(int event) {
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if (event == GpsStatus.GPS_EVENT_SATELLITE_STATUS) {
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int count = 0;
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GpsStatus status = locManager.getGpsStatus(null);
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for (GpsSatellite sat : status.getSatellites()) {
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count ++;
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}
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Message msg = new Message();
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msg.what = StationList.LookupStates.GPS_SAT_COUNT.ordinal();
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msg.arg1 = count;
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hndl.sendMessage(msg);
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}
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}
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}
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