Getting accurate GPS latitude and longitude

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July 9th, 2012, 02:31 PM

bransby

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Getting accurate GPS latitude and longitude

So I'm trying to get the most accurate location. It seems to be giving me a location about 2 miles away where I was yesterday.

Does anybody know how you can get about getting the phone to re calibrate where it is? The corresponding code is below.

Obviously there there is no defensive code yet.

Thank you in advance

Code:

public String getZipcode(){
		Location location = getMyLocation();
		double lat = location.getLatitude();
		double lng = location.getLongitude();
		List<Address> result = null;
		Address thisAddress = null;
		String zipcode = null;
		Geocoder g = new Geocoder(this,Locale.getDefault());
		try{
			result = g.getFromLocation(lat, lng, 1);
			thisAddress = result.get(i);
			zipcode = thisAddress.getPostalCode();
			}
		}catch(Exception e){}
		return zipcode;
	}

July 9th, 2012, 06:16 PM

E-Oreo

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What is getMyLocation() doing?

From a quick read of the API it looks like you should be binding a callback to a LocationManager and using that to obtain regular updates on the current location (which you might already be doing, I can't tell). My guess is that there is not a specific call you make to ask for a recalibration; either the recalibration happens automatically in all cases, or it only happens when you have an active handler bound to a LocationManager.

Another, perhaps more likely, possibility is that your LocationManager is set to only use GPS for location data and your phone is currently unable to obtain a GPS signal (for example, if you're testing inside a building). In that case the phone would probably return the last-known GPS location even if it differs from the phone's current location (as calculated using other metrics).

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July 11th, 2012, 05:00 PM