How to get the current location of the device? google maps

Question

I need to know the latitude and longitude of the marker that is placed when I click on my map, and I also need to know how to implement so that when I open the map a marker is placed in the current location, I have seen many videos and tutorials but none works or It's obsolete etc

the relevant code:

onCreate:

   @Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_add);
    mPost = new Post();
    initPantallaAdd();
    int status = GooglePlayServicesUtil.isGooglePlayServicesAvailable(getApplicationContext());


    if(status == ConnectionResult.SUCCESS){
        SupportMapFragment mapFragment = (SupportMapFragment) getSupportFragmentManager()
                .findFragmentById(R.id.mapAddUbicacion);
        mapFragment.getMapAsync(this);



    }else{
        Toast.makeText(getApplicationContext(), "Please install google play services", Toast.LENGTH_SHORT).show();
    }

}       

onMapReady:

  @Override
public void onMapReady(GoogleMap googleMap) {
    mMap = googleMap;
    mMap.setMapType(GoogleMap.MAP_TYPE_NORMAL);

    UiSettings uiSettings = mMap.getUiSettings();
    uiSettings.setZoomControlsEnabled(true);


     LatLng sydney = new LatLng(-0.193805, -78.467102);
    CameraPosition cp = CameraPosition.builder().target(sydney).zoom(16).tilt(3).build();

    float zoomlevel = 16;

    mMap.moveCamera(CameraUpdateFactory.newCameraPosition(cp));

    mMap.setOnMapClickListener(new GoogleMap.OnMapClickListener() {
        @Override
        public void onMapClick(LatLng latLng) {

            mMap.clear();
            MarkerOptions markerOptions = new MarkerOptions().position(new LatLng(latLng.latitude, latLng.longitude)).title("Selected point");
            mMap.addMarker(markerOptions);

        }
    });
   }

I implemented these methods but I don't know what to do:

  //==============================================================================================
// ON CONNECTION CALLBACKS
@Override
public void onConnected(@Nullable Bundle bundle) {

}

@Override
public void onConnectionSuspended(int i) {

}

@Override
public void onConnectionFailed(@NonNull ConnectionResult connectionResult) {

}

//==============================================================================================
// LOCATION LISTENER

@Override
public void onLocationChanged(Location location) {

}

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

}

@Override
public void onProviderEnabled(String provider) {

}

@Override
public void onProviderDisabled(String provider) {

}

Answer 1

First add this permissions to manifest

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

And use this class for Handle GpsTrack :

public class GPSTracker extends Service implements LocationListener {

    private final Context mContext;

    // flag for GPS status
    boolean isGPSEnabled = false;

    // flag for network status
    boolean isNetworkEnabled = false;

    // flag for GPS status
    public boolean canGetLocation = false;

    Location location; // location
    double latitude; // latitude
    double longitude; // longitude

    // The minimum distance to change Updates in meters
    private static final long MIN_DISTANCE_CHANGE_FOR_UPDATES = 10; // 10 meters

    // The minimum time between updates in milliseconds
    private static final long MIN_TIME_BW_UPDATES = 1000 * 60 * 1; // 1 minute

    // Declaring a Location Manager
    protected LocationManager locationManager;

    public GPSTracker(Context context) {
        this.mContext = context;
        getLocation();
    }

    public Location getLocation() {
        try {
            locationManager = (LocationManager) mContext
                    .getSystemService(LOCATION_SERVICE);

            // getting GPS status
            isGPSEnabled = locationManager
                    .isProviderEnabled(LocationManager.GPS_PROVIDER);

            // getting network status
            isNetworkEnabled = locationManager
                    .isProviderEnabled(LocationManager.NETWORK_PROVIDER);

            if (!isGPSEnabled && !isNetworkEnabled) {
                // no network provider is enabled
            } else {
                this.canGetLocation = true;
                // First get location from Network Provider
                if (isNetworkEnabled) {
                    locationManager.requestLocationUpdates(
                            LocationManager.NETWORK_PROVIDER,
                            MIN_TIME_BW_UPDATES,
                            MIN_DISTANCE_CHANGE_FOR_UPDATES, this);
                    Log.d("Network", "Network");
                    if (locationManager != null) {
                        location = locationManager
                                .getLastKnownLocation(LocationManager.NETWORK_PROVIDER);
                        if (location != null) {
                            latitude = location.getLatitude();
                            longitude = location.getLongitude();
                        }
                    }
                }
                // if GPS Enabled get lat/long using GPS Services
                if (isGPSEnabled) {
                    if (location == null) {
                        locationManager.requestLocationUpdates(
                                LocationManager.GPS_PROVIDER,
                                MIN_TIME_BW_UPDATES,
                                MIN_DISTANCE_CHANGE_FOR_UPDATES, this);
                        Log.d("GPS Enabled", "GPS Enabled");
                        if (locationManager != null) {
                            location = locationManager
                                    .getLastKnownLocation(LocationManager.GPS_PROVIDER);
                            if (location != null) {
                                latitude = location.getLatitude();
                                longitude = location.getLongitude();
                            }
                        }
                    }
                }
            }

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

        return location;
    }

    /**
     * Stop using GPS listener
     * Calling this function will stop using GPS in your app
     */
    public void stopUsingGPS() {
        if (locationManager != null) {
            locationManager.removeUpdates(GPSTracker.this);
        }
    }

    /**
     * Function to get latitude
     */
    public double getLatitude() {
        if (location != null) {
            latitude = location.getLatitude();
        }

        // return latitude
        return latitude;
    }

    /**
     * Function to get longitude
     */
    public double getLongitude() {
        if (location != null) {
            longitude = location.getLongitude();
        }

        // return longitude
        return longitude;
    }

    /**
     * Function to check GPS/wifi enabled
     *
     * @return boolean
     */
    public boolean canGetLocation() {
        return this.canGetLocation;
    }

    /**
     * Function to show settings alert dialog
     * On pressing Settings button will lauch Settings Options
     */
    public void showSettingsAlert() {
        AlertDialog.Builder alertDialog = new AlertDialog.Builder(mContext);

        // Setting Dialog Title
        alertDialog.setTitle("GPS is settings");

        // Setting Dialog Message_Preview
        alertDialog.setMessage("GPS is not enabled. Do you want to go to settings menu?");

        // On pressing Settings button
        alertDialog.setPositiveButton("Settings", new DialogInterface.OnClickListener() {
            public void onClick(DialogInterface dialog, int which) {
                Intent intent = new Intent(Settings.ACTION_LOCATION_SOURCE_SETTINGS);
                mContext.startActivity(intent);
            }
        });

        // on pressing cancel button
        alertDialog.setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
            public void onClick(DialogInterface dialog, int which) {
                dialog.cancel();
            }
        });

        // Showing Alert Message_Preview
        alertDialog.show();
    }

    @Override
    public void onLocationChanged(Location location) {
    }

    @Override
    public void onProviderDisabled(String provider) {
    }

    @Override
    public void onProviderEnabled(String provider) {
    }

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

    @Override
    public IBinder onBind(Intent arg0) {
        return null;
    }

}

for Android N+ you need to check permission on runtime check this in onCreate :

   private LatLng start = null; //currentLocation
   GPSTracker gpsTracker;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_maps);

        ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.ACCESS_FINE_LOCATION}, 1);

        LocationListener mLocationListener = new LocationListener() {
            @Override
            public void onLocationChanged(Location location) {

                start = new LatLng(location.getLatitude(), location.getLongitude());
            }

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

            }

            @Override
            public void onProviderEnabled(String provider) {

            }

            @Override
            public void onProviderDisabled(String provider) {

            }
        };


        LocationManager mLocationManager = (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) {
            mLocationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 5000,
                    10, mLocationListener);
        }


    }

and in onResume check that permission Granted Or Not :

 @Override
protected void onResume() {
    super.onResume();

    if (checkLocationPermission()) {
        gpsTracker = new GPSTracker(this);
        if (gpsTracker.canGetLocation) {
            start = new LatLng(gpsTracker.getLatitude(), gpsTracker.getLongitude());
        } else {
            Toast.makeText(this, "please accept permission !!!!", Toast.LENGTH_SHORT).show();
            finish();
        }

    }
}

check Permission Method :

public boolean checkLocationPermission() {
    String permission = "android.permission.ACCESS_FINE_LOCATION";
    int res = this.checkCallingOrSelfPermission(permission);
    return (res == PackageManager.PERMISSION_GRANTED);
}

and finally in onRequestPermissionsResult :

  @Override
public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
    switch (requestCode) {
        case 1: {
            // If request is cancelled, the result arrays are empty.
            if (grantResults.length > 0
                    && grantResults[0] == PackageManager.PERMISSION_GRANTED) {

                //Permission Granted 

                gpsTracker = new GPSTracker(this);
                if (gpsTracker.canGetLocation) {
                    start = new LatLng(gpsTracker.getLatitude(), gpsTracker.getLongitude());
                } else {
                    // permission denied, boo! Disable the
                    // functionality that depends on this permission.
                }
                return;
            }
            // other 'case' lines to check for other
            // permissions this app might request
        }
    }
}

now start is current location of device and update when location changed !

note : if user deny permission activity not launch(finish()) change it if you need another action !

by this methods you get location without need to GMap and can show this latlng on map manualy.

i hope to be useful :)

Answer 2

To work with map you have to follow some steps to configure it.

1- create a project at google developer console. https://console.developers.google.com/

2- select the project and leftmenu will show credential option click on it and than you will get option create credentialclick on it than it will ask for create api key click and create our project api key.

3-click on dashboard and select the project on top of the screen here you will get an option for enable api.

4- In this you will there is many google api, in the google map api section select google map api android and click enable .

now you will get a working api key this api key is used to work with map here i am giving you my repository you can take example from it. you do not need to configure for api key i am using my api key in it. If you want to use you own api key than only you need to do is update the api key in the project inside manifiest file meta data tag. here is a working example

Answer 3

GPS service is needed to get current location latitude and longitude.

Android Location API will provide the fused location functionality to you. Check the following links for better understanding.

1. http://www.vogella.com/tutorials/AndroidLocationAPI/article.html
2. http://clover.studio/2016/08/09/getting-current-location-in-android-using-location-manager/

Answer 4

Check out this code for getting the current latitude and longitude...

 public class MerchantTrack extends Common implements 
 GoogleApiClient.ConnectionCallbacks,
    GoogleApiClient.OnConnectionFailedListener,
    LocationListener {

private final static int CONNECTION_FAILURE_RESOLUTION_REQUEST = 9000;


@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.merchant_track);
    backbuttn=(ImageView)findViewById(R.id.backbuttn);
    getSupportActionBar().hide();

    mGoogleApiClient = new GoogleApiClient.Builder(this)
            .addApi(LocationServices.API)
            .addConnectionCallbacks(this)
            .addOnConnectionFailedListener(this).build();
    connectClient();



}


protected void connectClient() {
    // Connect the client.
    if (isGooglePlayServicesAvailable() && mGoogleApiClient != null) {
        mGoogleApiClient.connect();
    }
}

private boolean isGooglePlayServicesAvailable() {
    // Check that Google Play services is available
    int resultCode = GooglePlayServicesUtil.isGooglePlayServicesAvailable(this);
    // If Google Play services is available
    if (ConnectionResult.SUCCESS == resultCode) {
        // In debug mode, log the status
        Log.d("Location Updates", "Google Play services is available.");
        return true;
    } else {
        // Get the error dialog from Google Play services
        Dialog errorDialog = GooglePlayServicesUtil.getErrorDialog(resultCode, this,
                CONNECTION_FAILURE_RESOLUTION_REQUEST);

        // If Google Play services can provide an error dialog
        if (errorDialog != null) {
            // Create a new DialogFragment for the error dialog
            UberMapsActivity.ErrorDialogFragment errorFragment = new UberMapsActivity.ErrorDialogFragment();
            errorFragment.setDialog(errorDialog);
            errorFragment.show(getSupportFragmentManager(), "Location Updates");
        }

        return false;
    }
}



@Override
public void onConnected(Bundle bundle) {
    Location location = LocationServices.FusedLocationApi.getLastLocation(mGoogleApiClient);
    if (location != null) {

        //Toast.makeText(this, "GPS location was found!", Toast.LENGTH_SHORT).show();
        LatLng latLng = new LatLng(location.getLatitude(), location.getLongitude());
        latitudE = location.getLatitude();
        longitudE = location.getLongitude();

        Log.d("locationnss", String.valueOf(latitudE));


        new MerchLocAsync().execute();

    } else {
        new AlertDialog.Builder(MerchantTrack.this)
                .setIcon(android.R.drawable.ic_dialog_alert)
                .setMessage("Current location is unavailable!")
                .setPositiveButton("Ok", new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialog, int which) {
                        dialog.dismiss();
                    }
                })
                .show();
    }
    startLocationUpdates();
}

protected void startLocationUpdates() {
    mLocationRequest = new LocationRequest();
    mLocationRequest.setPriority(LocationRequest.PRIORITY_BALANCED_POWER_ACCURACY);
    LocationServices.FusedLocationApi.requestLocationUpdates(mGoogleApiClient,
            mLocationRequest, this);
}


@Override
public void onConnectionSuspended(int i) {

}

@Override
public void onConnectionFailed(ConnectionResult connectionResult) {

}

@Override
public void onLocationChanged(Location location) {

}




@Override
public void onBackPressed() {
    Intent home = new Intent(MerchantTrack.this,Home.class);
    startActivity(home);
    super.onBackPressed();
}