Current Location Finding

package com.example.lenovo.mapsdemo;
import android.Manifest;
import android.content.pm.PackageManager;
import android.location.Address;
import android.location.Geocoder;
import android.location.Location;
import android.location.LocationListener;
import android.location.LocationManager;
import android.support.v4.app.ActivityCompat;
import android.support.v4.app.FragmentActivity;
import android.os.Bundle;
import com.google.android.gms.maps.CameraUpdateFactory;
import com.google.android.gms.maps.GoogleMap;
import com.google.android.gms.maps.OnMapReadyCallback;
import com.google.android.gms.maps.SupportMapFragment;
import com.google.android.gms.maps.model.LatLng;
import com.google.android.gms.maps.model.MarkerOptions;
import java.io.IOException;
import java.util.List;

public class MapsActivity extends FragmentActivity implements OnMapReadyCallback {

    private GoogleMap mMap;
    LocationManager locationManager;

    @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(R.id.map);
        mapFragment.getMapAsync(this);
        locationManager = (LocationManager) getSystemService(LOCATION_SERVICE);
        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;
        }

        if(locationManager.isProviderEnabled(locationManager.NETWORK_PROVIDER))
        {
            locationManager.requestLocationUpdates(LocationManager.NETWORK_PROVIDER, 0, 0, new LocationListener() {
                @Override
                public void onLocationChanged(Location location) {
                    double lat=location.getLatitude();
                    double longitud=location.getLongitude();
                    LatLng latLng=new LatLng(lat,longitud);

                    Geocoder geocoder=new Geocoder(getApplicationContext());
                    try {
                        List<Address> addressList=geocoder.getFromLocation(lat,longitud,1);
                        String st=addressList.get(0).getLocality();
                        st+=addressList.get(0).getCountryName();
                        mMap.addMarker(new MarkerOptions().position(latLng).title(st));
                        mMap.moveCamera(CameraUpdateFactory.newLatLngZoom(latLng,20.6f));

                    } catch (IOException e) {
                        e.printStackTrace();
                    }


                }

                @Override
                public void onStatusChanged(String provider, int status, Bundle extras) {

                }

                @Override
                public void onProviderEnabled(String provider) {

                }

                @Override
                public void onProviderDisabled(String provider) {

                }            });
        }
        else if(locationManager.isProviderEnabled(locationManager.GPS_PROVIDER))
        {
            locationManager.requestLocationUpdates(locationManager.GPS_PROVIDER, 0, 0, new LocationListener() {
                @Override
                public void onLocationChanged(Location location) {
                    double lat=location.getLatitude();
                    double longitud=location.getLongitude();
                    LatLng latLng=new LatLng(lat,longitud);
                    Geocoder geocoder=new Geocoder(getApplicationContext());
                    try {
                        List<Address> addressList=geocoder.getFromLocation(lat,longitud,1);
                        String st=addressList.get(0).getLocality();
                        st+=addressList.get(0).getCountryName();
                        mMap.addMarker(new MarkerOptions().position(latLng).title(st));
                        mMap.moveCamera(CameraUpdateFactory.newLatLngZoom(latLng,20.6f));
                    } catch (IOException e) {
                        e.printStackTrace();
                    }
                }
                @Override
                public void onStatusChanged(String provider, int status, Bundle extras) {
                }
                @Override
                public void onProviderEnabled(String provider) {
                }
                @Override
                public void onProviderDisabled(String provider) {

                }
            });
        }
    }
    /**
     * Manipulates the map once available.
     * This callback is triggered when the map is ready to be used.
     * This is where we can add markers or lines, add listeners or move the camera. In this case,
     * we just add a marker near Sydney, Australia.
     * If Google Play services is not installed on the device, the user will be prompted to install
     * it inside the SupportMapFragment. This method will only be triggered once the user has
     * installed Google Play services and returned to the app.
     */
    @Override
    public void onMapReady(GoogleMap googleMap) {
        mMap = googleMap;

        // Add a marker in Sydney and move the camera
       // LatLng sydney = new LatLng(-34, 151);
       // mMap.addMarker(new MarkerOptions().position(sydney).title("Marker in Sydney"));
       // mMap.moveCamera(CameraUpdateFactory.newLatLngZoom(sydney,20.6f));
    }
}