如何在Android中获得纬度和经度的方向？

Question

我正在使用Java开发适用于Android的应用程序，以获取当前的经度和纬度。现在我需要使用这些变量来获取方向（街道名称，邮政编码......）我该如何获得它？

Answer 1

您可以通过传递 lat 和 long 值来使用 GeoCode 类来获取地址信息：

检查开发者网站Geocoder

Geocoder geocoder;
List<Address> addresses;
geocoder = new Geocoder(this, Locale.getDefault());
addresses = geocoder.getFromLocation(latitude, longitude, 1);

String address = addresses.get(0).getAddressLine(0);
String city = addresses.get(0).getAddressLine(1);
String country = addresses.get(0).getAddressLine(2);

上面的行给出了你的地址，并尝试下面的zip代码：

以下是Google网络服务

http://maps.googleapis.com/maps/api/geocode/json?latlng=lattitude,longitude&sensor=true

Answer 2

AndroidManifest.xml

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

<强>活动

import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;
import android.widget.TextView;

public class Activityextends Activity {

    TextView textview;

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

        // check if GPS enabled
        GPSTracker gpsTracker = new GPSTracker(this);

        if (gpsTracker.canGetLocation())
        {
            String stringLatitude = String.valueOf(gpsTracker.latitude);
            textview = (TextView)findViewById(R.id.fieldLatitude);
            textview.setText(stringLatitude);

            String stringLongitude = String.valueOf(gpsTracker.longitude);
            textview = (TextView)findViewById(R.id.fieldLongitude);
            textview.setText(stringLongitude);

            String country = gpsTracker.getCountryName(this);
            textview = (TextView)findViewById(R.id.fieldCountry);
            textview.setText(country);

            String city = gpsTracker.getLocality(this);
            textview = (TextView)findViewById(R.id.fieldCity);
            textview.setText(city);

            String postalCode = gpsTracker.getPostalCode(this);
            textview = (TextView)findViewById(R.id.fieldPostalCode);
            textview.setText(postalCode);

            String addressLine = gpsTracker.getAddressLine(this);
            textview = (TextView)findViewById(R.id.fieldAddressLine);
            textview.setText(addressLine);
        }
        else
        {
            // can't get location
            // GPS or Network is not enabled
            // Ask user to enable GPS/network in settings
            gpsTracker.showSettingsAlert();
        }
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.varna_lab_geo_locations, menu);
        return true;
    }

}

GPS追踪器

/**
 * Create this Class from tutorial : 
 * http://www.androidhive.info/2012/07/android-gps-location-manager-tutorial
 * 
 * For Geocoder read this : http://stackoverflow.com/questions/472313/android-reverse-geocoding-getfromlocation
 * 
 */

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;

    boolean canGetLocation = false;

    Location location;
    double latitude;
    double longitude;

    //The minimum distance to change updates in metters
    private static final long MIN_DISTANCE_CHANGE_FOR_UPDATES = 10; //10 metters

    //The minimum time beetwen 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);
                        updateGPSCoordinates();
                    }
                }

                //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);
                            updateGPSCoordinates();
                        }
                    }
                }
            }
        }
        catch (Exception e)
        {
            //e.printStackTrace();
            Log.e("Error : Location", "Impossible to connect to LocationManager", e);
        }

        return location;
    }

    public void updateGPSCoordinates()
    {
        if (location != null)
        {
            latitude = location.getLatitude();
            longitude = location.getLongitude();
        }
    }

    /**
     * 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;
    }

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

        return longitude;
    }

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

    /**
     * Function to show settings alert dialog
     */
    public void showSettingsAlert()
    {
        AlertDialog.Builder alertDialog = new AlertDialog.Builder(mContext);

        //Setting Dialog Title
        alertDialog.setTitle(R.string.GPSAlertDialogTitle);

        //Setting Dialog Message
        alertDialog.setMessage(R.string.GPSAlertDialogMessage);

        //On Pressing Setting button
        alertDialog.setPositiveButton(R.string.settings, new DialogInterface.OnClickListener() 
        {   
            @Override
            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(R.string.cancel, new DialogInterface.OnClickListener() 
        {   
            @Override
            public void onClick(DialogInterface dialog, int which) 
            {
                dialog.cancel();
            }
        });

        alertDialog.show();
    }

    /**
     * Get list of address by latitude and longitude
     * @return null or List<Address>
     */
    public List<Address> getGeocoderAddress(Context context)
    {
        if (location != null)
        {
            Geocoder geocoder = new Geocoder(context, Locale.ENGLISH);
            try 
            {
                List<Address> addresses = geocoder.getFromLocation(latitude, longitude, 1);
                return addresses;
            } 
            catch (IOException e) 
            {
                //e.printStackTrace();
                Log.e("Error : Geocoder", "Impossible to connect to Geocoder", e);
            }
        }

        return null;
    }

    /**
     * Try to get AddressLine
     * @return null or addressLine
     */
    public String getAddressLine(Context context)
    {
        List<Address> addresses = getGeocoderAddress(context);
        if (addresses != null && addresses.size() > 0)
        {
            Address address = addresses.get(0);
            String addressLine = address.getAddressLine(0);

            return addressLine;
        }
        else
        {
            return null;
        }
    }

    /**
     * Try to get Locality
     * @return null or locality
     */
    public String getLocality(Context context)
    {
        List<Address> addresses = getGeocoderAddress(context);
        if (addresses != null && addresses.size() > 0)
        {
            Address address = addresses.get(0);
            String locality = address.getLocality();

            return locality;
        }
        else
        {
            return null;
        }
    }

    /**
     * Try to get Postal Code
     * @return null or postalCode
     */
    public String getPostalCode(Context context)
    {
        List<Address> addresses = getGeocoderAddress(context);
        if (addresses != null && addresses.size() > 0)
        {
            Address address = addresses.get(0);
            String postalCode = address.getPostalCode();

            return postalCode;
        }
        else
        {
            return null;
        }
    }

    /**
     * Try to get CountryName
     * @return null or postalCode
     */
    public String getCountryName(Context context)
    {
        List<Address> addresses = getGeocoderAddress(context);
        if (addresses != null && addresses.size() > 0)
        {
            Address address = addresses.get(0);
            String countryName = address.getCountryName();

            return countryName;
        }
        else
        {
            return null;
        }
    }

    @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 intent) 
    {
        return null;
    }
}

Answer 3

试试这个

  Geocoder geocoder;
    List<Address> addresses;
    geocoder = new Geocoder(this, Locale.getDefault());
    addresses = geocoder.getFromLocation(latitude, longitude, 1);

    String address = addresses.get(0).getAddressLine(0);
    String city = addresses.get(0).getAddressLine(1);
    String country = addresses.get(0).getAddressLine(2);
    String postalCode = addresses.get(0).getPostalCode();

Answer 4

请参阅此链接 - http://developer.android.com/reference/android/location/Geocoder.html

反向地理编码是将（纬度，经度）坐标转换为（部分）地址的过程。反向地理编码位置描述中的详细信息量可能会有所不同，例如，一个可能包含最近建筑物的完整街道地址，而另一个可能只包含城市名称和邮政编码。 Geocoder类需要一个未包含在核心android框架中的后端服务。如果平台中没有后端服务，则Geocoder查询方法将返回空列表。使用isPresent（）方法确定是否存在Geocoder实现。

实施例： -

 Geocoder geoCoder = new Geocoder(context);

   List<Address> matches = geoCoder.getFromLocation(latitude, longitude, 1);

   Address bestMatch = (matches.isEmpty() ? null : matches.get(0));

将当前位置坐标提供给函数geoCoder.getFromLocation（）并查找地址详细信息。

Answer 5

try this..

package com.example.tracker;

import com.google.android.gms.maps.GoogleMap;
import com.google.android.gms.maps.SupportMapFragment;

import com.google.android.gms.maps.model.BitmapDescriptorFactory;
import com.google.android.gms.maps.model.LatLng;
import com.google.android.gms.maps.model.Marker;
import com.google.android.gms.maps.model.MarkerOptions;

import android.content.Context;
import android.content.Intent;
import android.location.Criteria;
import android.location.Location;
import android.location.LocationListener;
import android.location.LocationManager;
import android.os.Bundle;
import android.provider.Settings;
import android.support.v4.app.FragmentActivity;
import android.widget.Toast;

public class MainActivity extends FragmentActivity implements LocationListener {
    private GoogleMap map;
    private static final LatLng ROMA = new LatLng(42.093230818037,
            11.7971813678741);
    private LocationManager locationManager;
    private String provider;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        map = ((SupportMapFragment) getSupportFragmentManager()
                .findFragmentById(R.id.map)).getMap();

        LocationManager service = (LocationManager) getSystemService(LOCATION_SERVICE);
        boolean enabledGPS = service
                .isProviderEnabled(LocationManager.GPS_PROVIDER);
        boolean enabledWiFi = service
                .isProviderEnabled(LocationManager.NETWORK_PROVIDER);

        // Check if enabled and if not send user to the GSP settings
        // Better solution would be to display a dialog and suggesting to
        // go to the settings
        if (!enabledGPS) {
            Toast.makeText(this, "GPS signal not found", Toast.LENGTH_LONG)
                    .show();
            Intent intent = new Intent(Settings.ACTION_LOCATION_SOURCE_SETTINGS);
            startActivity(intent);
        }

        locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
        // Define the criteria how to select the locatioin provider -> use
        // default
        Criteria criteria = new Criteria();
        provider = locationManager.getBestProvider(criteria, false);
        Location location = locationManager.getLastKnownLocation(provider);

        // Initialize the location fields
        if (location != null) {
            Toast.makeText(this, "Selected Provider " + provider,
                    Toast.LENGTH_SHORT).show();
            onLocationChanged(location);
        } else {

            // do something
        }

    }

    /* Request updates at startup */
    @Override
    protected void onResume() {
        super.onResume();
        locationManager.requestLocationUpdates(provider, 400, 1, this);
    }

    /* Remove the locationlistener updates when Activity is paused */
    @Override
    protected void onPause() {
        super.onPause();
        locationManager.removeUpdates(this);
    }

    @Override
    public void onLocationChanged(Location location) {
        double lat = location.getLatitude();
        double lng = location.getLongitude();
        Toast.makeText(this, "Location " + lat + "," + lng, Toast.LENGTH_LONG)
                .show();
        LatLng coordinate = new LatLng(lat, lng);
        Toast.makeText(this,
                "Location " + coordinate.latitude + "," + coordinate.longitude,
                Toast.LENGTH_LONG).show();
        Marker startPerc = map.addMarker(new MarkerOptions()
                .position(coordinate)
                .title("Start")
                .snippet("Inizio del percorso")
                .icon(BitmapDescriptorFactory
                        .fromResource(R.drawable.ic_launcher)));
    }

    @Override
    public void onProviderDisabled(String provider) {
        Toast.makeText(this, "Enabled new provider " + provider,
                Toast.LENGTH_SHORT).show();

    }

    @Override
    public void onProviderEnabled(String provider) {
        Toast.makeText(this, "Disabled provider " + provider,
                Toast.LENGTH_SHORT).show();

    }

    @Override
    public void onStatusChanged(String provider, int status, Bundle extras) {
        // TODO Auto-generated method stub

    }

}
thank you..