Android Google Maps API V2 Zoom to Current Location

Question

I'm trying to mess around with the Maps API V2 to get more familiar with it, and I'm trying to start the map centered at the user's current location. Using the map.setMyLocationEnabled(true); statement, I am able to show my current location on the map. This also adds the button to the UI that centers the map on my current location.

I want to simulate that button press in my code. I am familiar with the LocationManager and LocationListener classes and realize that using those is a viable alternative, but the functionality to center and zoom in on the user's location seems to already be built in through the button.

If the API has a method to show the user's current location, there surely must be an easier way to center on the location than to use the LocationManager/LocationListener classes, right?

Nucleotide

Major point here is to get the geocoordinates of the current location. You can use GPS library to get that. Once you have the geocoordinates, its trivial. Refer the following for more details: #17519698 – Department

Answer 1

Try this coding:

LocationManager locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
Criteria criteria = new Criteria();

Location location = locationManager.getLastKnownLocation(locationManager.getBestProvider(criteria, false));
if (location != null)
{
    map.animateCamera(CameraUpdateFactory.newLatLngZoom(new LatLng(location.getLatitude(), location.getLongitude()), 13));

    CameraPosition cameraPosition = new CameraPosition.Builder()
        .target(new LatLng(location.getLatitude(), location.getLongitude()))      // Sets the center of the map to location user
        .zoom(17)                   // Sets the zoom
        .bearing(90)                // Sets the orientation of the camera to east
        .tilt(40)                   // Sets the tilt of the camera to 30 degrees
        .build();                   // Creates a CameraPosition from the builder
    map.animateCamera(CameraUpdateFactory.newCameraPosition(cameraPosition));       
}

Torpor

what if the location == null..Please help – Assuan

@Assuan Check here for my answer of how to get the user location. It uses the above method with a little fail safe to check the next best possible location of the user. https://mcmap.net/q/260313/-zoom-on-current-user-location-displayed That might remedy getting a null by checking the next best location. – Hainan

This solution it's simple and just works. Thank you. – Diabolism

This is not working for me on android 4.2.1 but working on my nexus 7 tablet with android 5. could you please help on this? – Mussorgsky

The Google Play services location APIs are preferred over the Android framework location APIs (android.location) as a way of adding location awareness to your app. This method is old. Please check developer.android.com/training/location/index.html – Noellenoellyn

Answer 2

After you instansiated the map object (from the fragment) add this -

private void centerMapOnMyLocation() {

    map.setMyLocationEnabled(true);

    location = map.getMyLocation();

    if (location != null) {
        myLocation = new LatLng(location.getLatitude(),
                location.getLongitude());
    }
    map.animateCamera(CameraUpdateFactory.newLatLngZoom(myLocation,
            Constants.MAP_ZOOM));
}

if you need any guidance just ask but it should be self explantory - just instansiate the myLocation object for a default one...

Octuple

I have the same problem, but when I try to use map.getMyLocation() it warns me that this method is deprecated. What would be the right way to do it now? – Unspoiled

"getMyLocation() This method is deprecated. use LocationClient instead. LocationClient provides improved location finding and power usage and is used by the "My Location" blue dot. See the MyLocationDemoActivity in the sample applications folder for example example code, or the Location Developer Guide." (taken from the android developer site) Next time just read the API if something got deprecated there is a replacement for it – Octuple

LocationClient has been marked obsolete. You have to use LocationServices instead – Alliaceous

I guess Constants.MAP_ZOOM is supposed to be the Zoom level defined by us? – Alien

@Zainodis you are guessing right. As a thumb rule whenever I write something that is dependent on some previous data or on a data that should be acquired I initiate it for some default value. – Octuple

what if the location == null..Please help – Assuan

@Assuan in this case try and get it from the device gps/3g last known location write it as an external method. – Octuple

developer.android.com/reference/com/google/android/gms/maps/… getMyLocation() This method is deprecated. use FusedLocationProviderApi instead. Answer edited – Andrus

Everything is being deprecated! – Bryozoan

Answer 3

youmap.animateCamera(CameraUpdateFactory.newLatLngZoom(currentlocation, 16));

16 is the zoom level

Kayekayla

But how do I get currentLocation without using the LocationManager and LocationListener? Or is that not possible? – Nucleotide

it is not possible as per my knowledge. and i am suggesting you not to use location manager . user Location client which is of high accuarcy and low battery power consumption and easy to implement.developer.android.com/google/play-services/location.html newly launched by google – Kayekayla

Location location = map.getMyLocation(); map is GoogleMap object – Reaves

instead of 16 you can use 14.0f – Sherrer

Answer 4

    mMap.setOnMyLocationChangeListener(new GoogleMap.OnMyLocationChangeListener() {
        @Override
        public void onMyLocationChange(Location location) {

                CameraUpdate center=CameraUpdateFactory.newLatLng(new LatLng(location.getLatitude(), location.getLongitude()));
                CameraUpdate zoom=CameraUpdateFactory.zoomTo(11);
                mMap.moveCamera(center);
                mMap.animateCamera(zoom);

        }
    });

Vyky

Unfortunately, this method is now deprecated :( – Rehnberg

And if you scroll away from your location, a few seconds later you will jump back to your current location, because your location just got updated. – Aileneaileron

Answer 5

try this code :

private GoogleMap mMap;


LocationManager locationManager;


private static final String TAG = "";

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_maps);
    // Obtain the SupportMapFragment and get notified when the map is ready to be used.
    SupportMapFragment mapFragment = (SupportMapFragment) getSupportFragmentManager()
            .findFragmentById(map);
    mapFragment.getMapAsync(this);

    arrayPoints = new ArrayList<LatLng>();
}

@Override
public void onMapReady(GoogleMap googleMap) {


    mMap = googleMap;


    mMap.setMapType(GoogleMap.MAP_TYPE_HYBRID);


    LatLng myPosition;


    if (ActivityCompat.checkSelfPermission(this, android.Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(this, android.Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
        // TODO: Consider calling
        //    ActivityCompat#requestPermissions
        // here to request the missing permissions, and then overriding
        //   public void onRequestPermissionsResult(int requestCode, String[] permissions,
        //                                          int[] grantResults)
        // to handle the case where the user grants the permission. See the documentation
        // for ActivityCompat#requestPermissions for more details.
        return;
    }
    googleMap.setMyLocationEnabled(true);
    LocationManager locationManager = (LocationManager) getSystemService(LOCATION_SERVICE);
    Criteria criteria = new Criteria();
    String provider = locationManager.getBestProvider(criteria, true);
    Location location = locationManager.getLastKnownLocation(provider);


    if (location != null) {
        double latitude = location.getLatitude();
        double longitude = location.getLongitude();
        LatLng latLng = new LatLng(latitude, longitude);
        myPosition = new LatLng(latitude, longitude);


        LatLng coordinate = new LatLng(latitude, longitude);
        CameraUpdate yourLocation = CameraUpdateFactory.newLatLngZoom(coordinate, 19);
        mMap.animateCamera(yourLocation);
    }
}

}

Dont forget to add permissions on AndroidManifest.xml.

<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/>
<uses-permission android:name="android.permission.INTERNET"/>
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION"/>

Densmore

Welcome to Stack Overflow! While this piece of code may answer the question, it is better to include a description of what the problem was, and how your code will tackle the given problem. For the future, here is some information, how to crack a awesome answer on Stack Overflow: stackoverflow.com/help/how-to-answer – Miticide

Answer 6

Here's how to do it inside ViewModel and FusedLocationProviderClient, code in Kotlin

locationClient.lastLocation.addOnSuccessListener { location: Location? ->
            location?.let {
                val position = CameraPosition.Builder()
                        .target(LatLng(it.latitude, it.longitude))
                        .zoom(15.0f)
                        .build()
                map.animateCamera(CameraUpdateFactory.newCameraPosition(position))
            }
        }

Woolson

Is that advisable? Chainging multiple items like locationClient.lastLocation.addOnSuccessListener{}? – Fiber

Answer 7

private void setUpMapIfNeeded(){
    if (mMap == null){
mMap = ((SupportMapFragment) getSupportFragmentManager().findFragmentById(R.id.map)).getMap();//invoke of map fragment by id from main xml file

     if (mMap != null) {
         mMap.setMyLocationEnabled(true);//Makes the users current location visible by displaying a blue dot.

         LocationManager lm=(LocationManager)getSystemService(LOCATION_SERVICE);//use of location services by firstly defining location manager.
         String provider=lm.getBestProvider(new Criteria(), true);

         if(provider==null){
             onProviderDisabled(provider);
              }
         Location loc=lm.getLastKnownLocation(provider);


         if (loc!=null){
             onLocationChanged(loc);
      }
         }
     }
}

    // Initialize map options. For example:
    // mMap.setMapType(GoogleMap.MAP_TYPE_HYBRID);

@Override
public void onLocationChanged(Location location) {

   LatLng latlng=new LatLng(location.getLatitude(),location.getLongitude());// This methods gets the users current longitude and latitude.

    mMap.moveCamera(CameraUpdateFactory.newLatLng(latlng));//Moves the camera to users current longitude and latitude
    mMap.animateCamera(CameraUpdateFactory.newLatLngZoom(latlng,(float) 14.6));//Animates camera and zooms to preferred state on the user's current location.
}

    // TODO Auto-generated method stub

---

Stcyr

Please add some explanation of what your code does and how it answers the question, and please format it properly. Convert tabs to spaces before copying code to SO, because tabs often don't get rendered as expected. – Corinnecorinth

The above solution loads up a map fragment, and shows a centred position of the users current location using the desired zoom level in this case mine was (14.6)@AdiInbar – Stcyr

Please include the explanations in the answer rather than responding in comments, and format the code. (FYI, I didn't ask out of personal interest. I encountered your answer in the Low Quality Posts review queue and was advising you to improve it to avoid further downvotes and delete votes.) – Corinnecorinth

Answer 8

check this out:

    fun requestMyGpsLocation(context: Context, callback: (location: Location) -> Unit) {
        val request = LocationRequest()
        //        request.interval = 10000
        //        request.fastestInterval = 5000
        request.numUpdates = 1
        request.priority = LocationRequest.PRIORITY_HIGH_ACCURACY
        val client = LocationServices.getFusedLocationProviderClient(context)

        val permission = ContextCompat.checkSelfPermission(context,
            Manifest.permission.ACCESS_FINE_LOCATION )
        if (permission == PackageManager.PERMISSION_GRANTED) {
            client.requestLocationUpdates(request, object : LocationCallback() {
                override fun onLocationResult(locationResult: LocationResult?) {
                val location = locationResult?.lastLocation
                if (location != null)
                    callback.invoke(location)
            }
         }, null)
       }
     }

and

    fun zoomOnMe() {
        requestMyGpsLocation(this) { location ->
            mMap?.animateCamera(CameraUpdateFactory.newLatLngZoom(
                LatLng(location.latitude,location.longitude ), 13F ))
        }
    }

Archuleta

Great man, very simple and working – Asgard

Answer 9

This is working Current Location with zoom for Google Map V2

 double lat= location.getLatitude();
 double lng = location.getLongitude();
 LatLng ll = new LatLng(lat, lng);
 googleMap.moveCamera(CameraUpdateFactory.newLatLngZoom(ll, 20));

Dyaus

location is throwing the error: Can not resolute symbol 'location' – Manille

The ask is how to get the current location coordinates and the answer is here: https://mcmap.net/q/260312/-how-to-get-the-current-location-latitude-and-longitude-in-android – Department

Answer 10

In kotlin, you will get the current location then move the camera like this

map.isMyLocationEnabled = true
fusedLocationClient.lastLocation
    .addOnSuccessListener { location: Location? ->
        if (location != null) {
            map.moveCamera(CameraUpdateFactory.newLatLngZoom(LatLng(location.latitude, location.longitude), 14f))
        }
    }

Also you can animate the move by using this function instead

map.animateCamera(CameraUpdateFactory.newLatLngZoom(LatLng(location.latitude, location.longitude), 14f))

Zabrine