/**** * GPS Process *  * First of all call listener of Location * then checking for GPS_PROVIDER * if not available then check for NETWORK_PROVIDER * and if its also not available then pass 0.00,0.00 to longitude and latitude *    **** *//** PROCESS for Get Longitude and Latitude **/locationManager = (LocationManager) getSystemService(LOCATION_SERVICE);// Define a listener that responds to location updates(定义一个更新位置监听)locationListener = new LocationListener() {	public void onLocationChanged(Location location) {		// Called when a new location is found by the network location provider.()		longitude = String.valueOf(location.getLongitude());		latitude = String.valueOf(location.getLatitude());		Log.d(TAG, "changed Loc : " + longitude + ":" + latitude);	}	public void onStatusChanged(String provider, int status, Bundle extras) {	}	public void onProviderEnabled(String provider) {	}	public void onProviderDisabled(String provider) {	}};// getting GPS statusisGPSEnabled = locationManager.isProviderEnabled(LocationManager.GPS_PROVIDER);// check if GPS enabledif (isGPSEnabled) {	Location location = locationManager.getLastKnownLocation(LocationManager.GPS_PROVIDER);//最后一次知道的位置信息	if (location != null) {		longitude = String.valueOf(location.getLongitude());		latitude = String.valueOf(location.getLatitude());		locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0, 0, locationListener);//然后更新位置	} else {		location = locationManager.getLastKnownLocation(LocationManager.NETWORK_PROVIDER);		if (location != null) {			longitude = String.valueOf(location.getLongitude());			latitude = String.valueOf(location.getLatitude());			locationManager.requestLocationUpdates(LocationManager.NETWORK_PROVIDER, 0, 0, locationListener);		} else {			longitude = "0.00";			latitude = "0.00";		}	}}// see http://androidsnippets.com/android-gps-location-with-listener