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

User · Answer

Here s how to do it inside ViewModel and FusedLocationProviderClient  code in Kotlin  locationClient lastLocation addOnSuccessListener   location  Location  - gt              location  let                   val position   CameraPosition Builder                            target LatLng it latitude  it longitude                            zoom 15 0f                           build                   map animateCamera CameraUpdateFactory newCameraPosition position

User · Answer

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 lt LatLng gt         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  amp  amp  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    lt uses-permission android name  android permission ACCESS FINE LOCATION   gt   lt uses-permission android name  android permission INTERNET   gt   lt uses-permission android name  android permission ACCESS COARSE LOCATION   gt

User · Answer

check this out       fun requestMyGpsLocation context  Context  callback   location  Location  - gt  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 - gt              mMap  animateCamera CameraUpdateFactory newLatLngZoom                  LatLng location latitude location longitude    13F

User · Answer

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

User · Answer

youmap animateCamera CameraUpdateFactory newLatLngZoom currentlocation  16      16 is the zoom level

User · Answer

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

User · Answer

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

User · Answer

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

User · Answer

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

[android] Android Google Maps API V2 Zoom to Current Location

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