how to get current location in google map android

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长发绾君心
长发绾君心 2020-11-27 14:04

Actually my problem is I am not getting current location latitude and longitude I tried so many ways.I know that this question already asked in SO I tried that answers also

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17条回答
  • 2020-11-27 14:34
    public void getMyLocation() {
            // create class object
            gps = new GPSTracker(HomeActivity.this);
            // check if GPS enabled
            if (gps.canGetLocation()) {
                latitude = gps.getLatitude();
                longitude = gps.getLongitude();
                Geocoder geocoder;
                List<Address> addresses;
                geocoder = new Geocoder(this, Locale.getDefault());
                try {
                    addresses = geocoder.getFromLocation(latitude, longitude, 1);
                    postalCode = addresses.get(0).getPostalCode();
                    city = addresses.get(0).getLocality();
                    address = addresses.get(0).getAddressLine(0);
                    state = addresses.get(0).getAdminArea();
                    country = addresses.get(0).getCountryName();
                    knownName = addresses.get(0).getFeatureName();
                    Log.e("Location",postalCode+" "+city+" "+address+" "+state+" "+knownName);
    
                } catch (IOException e) {
                    e.printStackTrace();
                }
            } else {
                gps.showSettingsAlert();
            }
        }
    
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  • 2020-11-27 14:39

    If you don't need to retrieve the user's location every time it changes (I have no idea why nearly every solution does that by using a location listener), it's just wasteful to do so. The asker was clearly interested in retrieving the location just once. Now FusedLocationApi is deprecated, so as a replacement for @Andrey's post, you can do:

    
        LocationManager locationManager = (LocationManager) this.getSystemService(Context.LOCATION_SERVICE);
        String locationProvider = LocationManager.NETWORK_PROVIDER;
        // I suppressed the missing-permission warning because this wouldn't be executed in my 
        // case without location services being enabled
        @SuppressLint("MissingPermission") android.location.Location lastKnownLocation = locationManager.getLastKnownLocation(locationProvider);
        double userLat = lastKnownLocation.getLatitude();
        double userLong = lastKnownLocation.getLongitude();
    
    

    This just puts together some scattered information in the docs, this being the most important source.

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  • 2020-11-27 14:43

    FusedLocationApi has been Deprecated (Why Google always deprecated everything!)

    location: retrieve-current

    Here is the way to get it now:

    private lateinit var fusedLocationClient: FusedLocationProviderClient
    
    override fun onCreate(savedInstanceState: Bundle?) {
        // ...
    
        fusedLocationClient = LocationServices.getFusedLocationProviderClient(this)
    }
    
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  • 2020-11-27 14:44

    Why not to use FusedLocationApi instead of OnMyLocationChangeListener? You need to initialize GoogleApiClient object and use LocationServices.FusedLocationApi.requestLocationUpdates() method to register location change listener. It is important to note, that don't forget to remove the registered listener and disconnect GoogleApiClient.

    private LocationRequest  mLocationRequest;
    private GoogleApiClient  mGoogleApiClient;
    private LocationListener mLocationListener;
    
    private void initGoogleApiClient(Context context)
    {
        mGoogleApiClient = new GoogleApiClient.Builder(context).addApi(LocationServices.API).addConnectionCallbacks(new GoogleApiClient.ConnectionCallbacks()
        {
            @Override
            public void onConnected(Bundle bundle)
            {
                mLocationRequest = LocationRequest.create();
                mLocationRequest.setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY);
                mLocationRequest.setInterval(1000);
    
                setLocationListener();
            }
    
            @Override
            public void onConnectionSuspended(int i)
            {
                Log.i("LOG_TAG", "onConnectionSuspended");
            }
        }).build();
    
        if (mGoogleApiClient != null)
            mGoogleApiClient.connect();
    
    }
    
    private void setLocationListener()
    {
        mLocationListener = new LocationListener()
        {
            @Override
            public void onLocationChanged(Location location)
            {
                String lat = String.valueOf(location.getLatitude());
                String lon = String.valueOf(location.getLongitude());
                Log.i("LOG_TAG", "Latitude = " + lat + " Longitude = " + lon);
            }
        };
    
        LocationServices.FusedLocationApi.requestLocationUpdates(mGoogleApiClient, mLocationRequest, mLocationListener);
    }
    
    private void removeLocationListener()
    {
        LocationServices.FusedLocationApi.removeLocationUpdates(mGoogleApiClient, mLocationListener);
    }
    
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  • 2020-11-27 14:46

    I think that better way now is:

    Location currentLocation = LocationServices.FusedLocationApi.getLastLocation(googleApiClient);
    

    Documentation. Getting the Last Known Location

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  • 2020-11-27 14:48
    package com.example.sandeep.googlemapsample;
    
    import android.content.pm.PackageManager;
    import android.location.Location;
    import android.support.annotation.NonNull;
    import android.support.annotation.Nullable;
    import android.support.v4.app.ActivityCompat;
    import android.support.v4.app.FragmentActivity;
    import android.os.Bundle;
    import android.util.Log;
    import android.view.View;
    import android.widget.Toast;
    
    import com.google.android.gms.common.ConnectionResult;
    import com.google.android.gms.common.api.GoogleApiClient;
    import com.google.android.gms.location.LocationServices;
    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.Marker;
    import com.google.android.gms.maps.model.MarkerOptions;
    
    public class MapsActivity extends FragmentActivity implements OnMapReadyCallback,
            GoogleApiClient.ConnectionCallbacks,
            GoogleApiClient.OnConnectionFailedListener,
            GoogleMap.OnMarkerDragListener,
            GoogleMap.OnMapLongClickListener,
            GoogleMap.OnMarkerClickListener,
            View.OnClickListener {
    
        private static final String TAG = "MapsActivity";
        private GoogleMap mMap;
        private double longitude;
        private double latitude;
        private GoogleApiClient googleApiClient;
    
    
        @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);
    
            //Initializing googleApiClient
            googleApiClient = new GoogleApiClient.Builder(this)
                    .addConnectionCallbacks(this)
                    .addOnConnectionFailedListener(this)
                    .addApi(LocationServices.API)
                    .build();
        }
    
    
        @Override
        public void onMapReady(GoogleMap googleMap) {
            mMap = googleMap;
            mMap.setMapType(GoogleMap.MAP_TYPE_HYBRID);
           // googleMapOptions.mapType(googleMap.MAP_TYPE_HYBRID)
                        //    .compassEnabled(true);
    
            // Add a marker in Sydney and move the camera
            LatLng india = new LatLng(-34, 151);
            mMap.addMarker(new MarkerOptions().position(india).title("Marker in India"));
            mMap.moveCamera(CameraUpdateFactory.newLatLng(india));
            mMap.setOnMarkerDragListener(this);
            mMap.setOnMapLongClickListener(this);
        }
    
        //Getting current location
        private void getCurrentLocation() {
            mMap.clear();
            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;
            }
            Location location = LocationServices.FusedLocationApi.getLastLocation(googleApiClient);
            if (location != null) {
                //Getting longitude and latitude
                longitude = location.getLongitude();
                latitude = location.getLatitude();
    
                //moving the map to location
                moveMap();
            }
        }
    
        private void moveMap() {
            /**
             * Creating the latlng object to store lat, long coordinates
             * adding marker to map
             * move the camera with animation
             */
            LatLng latLng = new LatLng(latitude, longitude);
            mMap.addMarker(new MarkerOptions()
                    .position(latLng)
                    .draggable(true)
                    .title("Marker in India"));
    
            mMap.moveCamera(CameraUpdateFactory.newLatLng(latLng));
            mMap.animateCamera(CameraUpdateFactory.zoomTo(15));
            mMap.getUiSettings().setZoomControlsEnabled(true);
    
    
        }
    
        @Override
        public void onClick(View view) {
            Log.v(TAG,"view click event");
        }
    
        @Override
        public void onConnected(@Nullable Bundle bundle) {
            getCurrentLocation();
        }
    
        @Override
        public void onConnectionSuspended(int i) {
    
        }
    
        @Override
        public void onConnectionFailed(@NonNull ConnectionResult connectionResult) {
    
        }
    
        @Override
        public void onMapLongClick(LatLng latLng) {
            // mMap.clear();
            mMap.addMarker(new MarkerOptions().position(latLng).draggable(true));
        }
    
        @Override
        public void onMarkerDragStart(Marker marker) {
            Toast.makeText(MapsActivity.this, "onMarkerDragStart", Toast.LENGTH_SHORT).show();
        }
    
        @Override
        public void onMarkerDrag(Marker marker) {
            Toast.makeText(MapsActivity.this, "onMarkerDrag", Toast.LENGTH_SHORT).show();
        }
    
        @Override
        public void onMarkerDragEnd(Marker marker) {
            // getting the Co-ordinates
            latitude = marker.getPosition().latitude;
            longitude = marker.getPosition().longitude;
    
            //move to current position
            moveMap();
        }
    
        @Override
        protected void onStart() {
            googleApiClient.connect();
            super.onStart();
        }
    
        @Override
        protected void onStop() {
            googleApiClient.disconnect();
            super.onStop();
        }
    
    
        @Override
        public boolean onMarkerClick(Marker marker) {
            Toast.makeText(MapsActivity.this, "onMarkerClick", Toast.LENGTH_SHORT).show();
            return true;
        }
    
    }
    
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