How to get altitude in Android - android

I use the Location class to get altitude, but it always returns 0.
Please tell me how to get altitude?
Location.getAltitude();

Initially I used location.getAltitude() and it always retuned 0.0 . Then I came across https://groups.google.com/forum/#!topic/android-beginners/KNeLh905ip0 it helped me solve my problem. It works on actual real device.
private LocationProvider _locationProvider;
private LocationManager _locationManager;
_locationManager = (LocationManager) mContext
.getSystemService(LOCATION_SERVICE);
_locationProvider = _locationManager
.getProvider(LocationManager.GPS_PROVIDER);
location = _locationManager.getLastKnownLocation
(LocationManager.GPS_PROVIDER);
_locationProvider.supportsAltitude();
hasaltitude = location.hasAltitude();
double altitude = location.getAltitude();
System.out.println("HasAltitude" + hasaltitude+"-"+altitude);
The value of "altitude" is will be in meters.

Altitude is typically only available with GPS provider. You can check with available location provider if the support altitude:
locationProvider.hasAltitude();

You need to obtain the user Location :
http://developer.android.com/guide/topics/location/obtaining-user-location.html
The locationListener will give you a Location object, on which you can use the getAltitude() function.

With all the different methods to get location, while request a location for high accuracy it requires permission ACCESS_FINE_LOCATION

Related

How to get latitude and longitude android in offline mode

I am so interested, can i get gps coordinat in offline mode (without internet connection). Is it possible? how can do that?
thanks in advance
LocationManager lm = (LocationManager)getSystemService(Context.LOCATION_SERVICE);
Location location = lm.getLastKnownLocation(LocationManager.GPS_PROVIDER);
if(location==null){
location = lm.getLastKnownLocation(LocationManager.NETWORK_PROVIDER);
}
This will get lat and long from Network provider.
First it will try to get location from GPS. If gps is off, it will return as null. Thats why I put if(location==null) condition.

Android. How to know if location detected is from GPS or Network provider

I'm trying to implement an application which senses position from both GPS and the network provider and shows it on a Google Map. I succeeded in doing this, but I have a question:
I get the provider in the onCreate() of my Activity (it extends LocationListener)
locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
Criteria criteria = new Criteria();
provider = locationManager.getBestProvider(criteria, false);
location = locationManager.getLastKnownLocation(provider);
It works fine, my problem is that when onLocationChange() is called, I should act differently if the provider which called it is GPS or NETWORK. Is there a way to know which?
To be more clear:
When onLocationChanged(Location location) is called, is there a chance to know which provider made the call? I have tried using an if on the provider string but it seems it doesn't work.
Do you need to know the Location provider (GPS, WIFI or Network) or its accuracy?
getAccuracy()
Get the estimated accuracy of this location, in meters.
We define accuracy as the radius of 68% confidence. In other words, if you draw a circle centered at this location's latitude and longitude, and with a radius equal to the accuracy, then there is a 68% probability that the true location is inside the circle.
If you really care about the provider, you could probably use isProviderEnabled().
check that accuracy is <= 30m:
boolean isGPS = (location.getAccuracy() <= 30);
I think you wanna know which provider provided last Location update .....
u have created Provider as a string just use that String in code like
if (provider.matches("GPS")){}
I see several answers, and although they may be useful, none addresses the actual question asked:
When onLocationChanged(Location location) is called, is there a chance to know which provider made the call?
To know whether it was GPS_PROVIDER or NETWORK_PROVIDER the one triggering the onLocationChanged you can use the getProvider() method (or the provider value in Kotlin):
#Override
public void onLocationChanged(Location location){
//obtain a string, 'gps' or 'network', from the location
System.out.println(location.getProvider());
}
Or in Kotlin:
override fun onLocationChanged(location: Location?) {
println(location!!.provider)
}
Doc reference here

Getting longitude and latitude values faster

I am developing an application in android and I want to get the latitude and longitude of the android mobile. My code for getting latitude and longitude is giving values after some time. And sometimes, it doesn't give values at all. Can anyone help me what can be done!
You need to add this code for getting te current location. make sure you give all the permissions
Location Manager location = locationManager.getLastKnownLocation(LocationManager.GPS_PROVIDER);
if(location!=null)
{
latitude = location.getLatitude();
longitude = location.getLongitude();
}
Please used last know location from your location service provider if you not get latest because
When your application is not running at that time some other application used location manager to get current location.
then once you start your application with location manager,what happen location manager basically take some time to prepare to send current location so at that time you have to get last know location from location provider,for that you have to design service in such way.
once the location manager is stable then used those location.
this is best way.
Thank you
Bhavdip
One quicker way would be to get the last known location getLastKnownLocation()
and check if the time of this location is not far location.getTime(). Or use it until you get the real location.
Another tip is to use both GPS_PROVIDER and NETWORK_PROVIDER so your code will be like this :
LocationManager locManager;
locManager = (LocationManager)getSystemService(Context.LOCATION_SERVICE);
/*call both providers , the quickest one will call the listener and in the listener you remove the locationUpdates*/
locManager.requestLocationUpdates(LocationManager.GPS_PROVIDER,0 ,0 , locationListener);
locManager.requestLocationUpdates(LocationManager.NETWORK_PROVIDER,0 ,0 , locationListener);
Location location = locManager.getLastKnownLocation(LocationManager.GPS_PROVIDER);
/*check both providers even for lastKnownLocation*/
if (location == null)
{
location = locManager.getLastKnownLocation(LocationManager.NETWORK_PROVIDER);
}
if(location != null) {
String lat = String.valueOf(location.getLatitude());
v1.setText(lat);
String longi = String.valueOf(location.getLatitude());
v2.setText(longi);
}
this is a simple example, a more elaborate solution would compare the newest lastKnownLocation between providers.

Get current coordinates

Im writing an application that supposed to send coordinates in an SMS, but I've been struggling a bit with understanding how to get the coordinates.
At the moment I'm using this
LocationManager lm = (LocationManager)getSystemService(Context.LOCATION_SERVICE);
Location location = lm.getLastKnownLocation(LocationManager.GPS_PROVIDER);
longitude = location.getLongitude();
latitude = location.getLatitude();
And then i pass the long and lat into the text, but this only gives me the last know location i guess?
Can anyone tell me how to get the current location?
Regards
/Fred
you need to create a LocationListener and pass it to the LocationManager like this: locationManager.requestLocationUpdates(
locationManager.getBestProvider(fine, true),
minTime, 0, listenerFine);
You will get your lat/long updates from the listener in onLocationChanged()
Please referred Below Link it may be Help You
Get user current position with gps/network android MapView
or
http://www.vogella.de/articles/AndroidLocationAPI/article.html

gps doesn't provide my longitude and latitude accurately Android?

I am usin location service for getting latitude and longitude of my location.While running my program it will give me wrong latitude and longitude.How can i get my current location details accurately? Is there any settings in mobile /device ?
String locationProvider = LocationManager.GPS_PROVIDER;
if(!locationManager.isProviderEnabled(LocationManager.GPS_PROVIDER )) {
locationProvider = LocationManager.NETWORK_PROVIDER;
}
Log.w(TAG,"CurrentLocProvider :"+locationProvider);
location=locationManager.getLastKnownLocation(locationProvider);
Log.i(TAG,"Location :"+location);
if(location!=null){
Log.i(TAG,"Location Lat :"+location.getLatitude());
latitude = Double.toString(location.getLatitude());
longitude = Double.toString(location.getLongitude());
txtView.append("\nLatitude : "+latitude+"\n Longitude : "+longitude);
}
After some time
public void onLocationChanged(Location location) {
Log.i(TAG,"Lat :"+location.getLatitude();
Log.i(TAG,"Long :"+location.getLongitude();
}
Also giving me wrong location.Some times USA,In another device china.In Different device it is giving different results?
How can i get the currect result?
Thanks,
aare.
Hm, it is very unlikely (but possible) to give you wrong coordinates - if the device GPS is not working properly.
BTW - the method getLastKnownLocation may return completely wrong data, as described in another stackoverflow question:
this location can be "out-of-date", since the method returns the location when the GPS was used the last time.
Give a look at onStatusChanged, also. You may output the status changes of the GPS to get a better vision of what's going on.
You should also check if network location provider is enabled (users can have this disabled in settings):
locationManager.isProviderEnabled(LocationManager.NETWORK_PROVIDER)
Or even better: use LocationManager.PASSIVE_PROVIDER.

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