Question

如何从我的位置获取当前的GeoPoint。我在：经度：21.760029 纬度：54.035795

但是当我使用getLatitude（）时，我有54.0 但我想要54.035795。

请帮忙。

Answer 1

以下是将纬度，经度对转换为GeoPoint对象的方法：

public static GeoPoint convert(double latitude, double longitude)
{
    int lat = (int)(latitude * 1E6);
    int lng = (int)(longitude * 1E6);

    return new GeoPoint(lat, lng);
}

Answer 2

我用它：

LocationGpsListener mGPS = new LocationGpsListener(this);
currentLocation = mGPS.getLocation();

和听众：

import android.app.AlertDialog;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.location.Location;
import android.location.LocationListener;
import android.location.LocationManager;
import android.os.Bundle;
import android.provider.Settings;
import android.util.Log;


public final class LocationGpsListener implements LocationListener {

        private final Context mContext;
        public boolean isGPSEnabled = false;
        boolean isNetworkEnabled = false;
        boolean canGetLocation = false;

        Location location;
        Double latitude;
        Double longitude;

        private static final long MIN_DISTANCE_CHANGE_FOR_UPDATES = 10;
        private static final long MIN_TIME_BW_UPDATES = 1000 * 60 * 1;

        protected LocationManager locationManager;

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

        public Location getLocation() {
            try {
                locationManager = (LocationManager) mContext.getSystemService(Context.LOCATION_SERVICE);
                isGPSEnabled = locationManager.isProviderEnabled(LocationManager.GPS_PROVIDER);
                Log.v("isGPSEnabled", "=" + isGPSEnabled);

                isNetworkEnabled = locationManager.isProviderEnabled(LocationManager.NETWORK_PROVIDER);
                Log.v("isNetworkEnabled", "=" + isNetworkEnabled);

                if (isGPSEnabled == false && isNetworkEnabled == false) {

                } else {
                    this.canGetLocation = true;
                    if (isNetworkEnabled) {
                        locationManager.requestLocationUpdates(
                                LocationManager.NETWORK_PROVIDER,
                                MIN_TIME_BW_UPDATES,
                                MIN_DISTANCE_CHANGE_FOR_UPDATES, this);
                        if (locationManager != null) {
                            location = locationManager.getLastKnownLocation(LocationManager.NETWORK_PROVIDER);
                            if (location != null) {
                                latitude = location.getLatitude();
                                longitude = location.getLongitude();
                            }
                        }
                    }
                    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;
        }

        public void stopUsingGPS() {
            if (locationManager != null) {
                locationManager.removeUpdates(LocationGpsListener.this);
            }
        }

        public double getLatitude() {
            if (location != null) {
                latitude = location.getLatitude();
            }
            return latitude;
        }

        public double getLongitude() {
            if (location != null) {
                longitude = location.getLongitude();
            }
            return longitude;
        }

        public boolean canGetLocation() {
            return this.canGetLocation;
        }

        public void showSettingsAlert() {
            AlertDialog.Builder alertDialog = new AlertDialog.Builder(mContext);

            alertDialog.setTitle("Ustawienia GPS");
            alertDialog.setMessage("GPS jest wyłączony. Przejść do ustawień GPS?");

            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);
                        }
                    });

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

        @Override
        public void onLocationChanged(Location location) {
            this.location = location;
        }

        @Override
        public void onProviderDisabled(String provider) {
        }

        @Override
        public void onProviderEnabled(String provider) {
        }

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

GeoPoint和当前位置

2 个答案: