How to get current location of device on google maps api v2?

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走了就别回头了
走了就别回头了 2020-12-17 06:38

I´ve found some methods to do that but are deprecated or doesn´t work. I would like to get current latitude and longitude from device.

Here is how I\'m getting the c

4条回答
  •  悲&欢浪女
    2020-12-17 07:08

    Create a GPSTracker class as follows

    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
        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
            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
            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;
        }
    
    }
    

    After that in your activity in which you wnat to get current location, do following things:

    GPSTracker tracker;
    

    In oncreate method:

    tracker = new GPSTracker(MainActivity.this);
    double lat=tracker.getLatitude();
    double lng=tracker.getLongitude();
    

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