MapAndroid

    //copy your map_activity.xml in layout folder
    
    <fragment
        android:id="@+id/map"
        android:name="com.google.android.gms.maps.SupportMapFragment"
        android:layout_width="match_parent"
        android:layout_height="match_parent" />
        
        
        public class MapActivity extends AppCompatActivity implements OnMapReadyCallback {
        
         private GoogleMap mMap;
           @Override
           protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.map_activity);
 
        // Obtain the SupportMapFragment and get notified when the map is ready to be used.
           SupportMapFragment mapFragment = (SupportMapFragment) getSupportFragmentManager()
                .findFragmentById(R.id.map);
           mapFragment.getMapAsync(this);
           }
           
           
        }
        
        
          /**
     *
     * @param googleMap
     * onMapReady method Invoke the current lat and lang in onMap Ready
     */
    @Override
    public void onMapReady(GoogleMap googleMap) throws Resources.NotFoundException{
        mMap = googleMap;
        mMap.setMapStyle(MapStyleOptions.loadRawResourceStyle(this, R.raw.mapstyle_aubergine));
        LatLng hcmus = new LatLng(11.0791, 77.0017);

        CameraPosition cameraPosition =
                new CameraPosition.Builder()
                        .target(hcmus)
                        .bearing(45)
                        .tilt(90)
                        .zoom(googleMap.getCameraPosition().zoom)
                        .build();
        CameraUpdate cameraUpdate = CameraUpdateFactory.newCameraPosition(cameraPosition);
        mMap.animateCamera(
                cameraUpdate,
                300,
                new GoogleMap.CancelableCallback() {

                    @Override
                    public void onFinish() {
                    }

                    @Override
                    public void onCancel() {
                    }
                }
        );

    //    mMap.moveCamera(cameraUpdate);
        originMarkers.add(mMap.addMarker(new MarkerOptions()
                .title("Alumni")
                .position(hcmus)));

        if (ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(this, 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;
        }
        mMap.setMyLocationEnabled(true);
    }


// copy your gradle dependency
compile 'com.google.android.gms:play-services:9.6.1'

// inside your manifest application
 <meta-data
            android:name="com.google.android.geo.API_KEY"
            android:value="@string/google_maps_key" />