Jak uzyskać szerokość i długość geograficzną urządzenia mobilnego w systemie Android?

Jak uzyskać bieżącą szerokość i długość geograficzną urządzenia mobilnego w systemie Android za pomocą narzędzi do lokalizacji?

Użyj LocationManager.

LocationManager lm = (LocationManager)getSystemService(Context.LOCATION_SERVICE); 
Location location = lm.getLastKnownLocation(LocationManager.GPS_PROVIDER);
double longitude = location.getLongitude();
double latitude = location.getLatitude();

Wywołanie getLastKnownLocation()to nie blokuje - co oznacza, że ​​zostanie zwrócone, nulljeśli żadna pozycja nie jest obecnie dostępna - więc prawdopodobnie powinieneś rzucić okiem na przekazanie metodyLocationListener do requestLocationUpdates()metody , co da ci asynchroniczne aktualizacje twojej lokalizacji.

private final LocationListener locationListener = new LocationListener() {
    public void onLocationChanged(Location location) {
        longitude = location.getLongitude();
        latitude = location.getLatitude();
    }
}

lm.requestLocationUpdates(LocationManager.GPS_PROVIDER, 2000, 10, locationListener);

Musisz ACCESS_FINE_LOCATIONzezwolić aplikacji na korzystanie z GPS.

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

Możesz także dodać ACCESS_COARSE_LOCATIONpozwolenie, gdy GPS nie jest dostępny i wybrać dostawcę lokalizacji za pomocą tej getBestProvider()metody .

Oto klasa, LocationFinderaby znaleźć lokalizację GPS. Ta klasa zadzwoniMyLocation , co załatwi sprawę.

LocationFinder

public class LocationFinder extends Activity {

    int increment = 4;
    MyLocation myLocation = new MyLocation();

    // private ProgressDialog dialog;

    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.intermediat);
        myLocation.getLocation(getApplicationContext(), locationResult);

        boolean r = myLocation.getLocation(getApplicationContext(),
            locationResult);

        startActivity(new Intent(LocationFinder.this,
        // Nearbyhotelfinder.class));
            GPSMyListView.class));
        finish();
    }

    public LocationResult locationResult = new LocationResult() {

        @Override
        public void gotLocation(Location location) {
            // TODO Auto-generated method stub
            double Longitude = location.getLongitude();
            double Latitude = location.getLatitude();

            Toast.makeText(getApplicationContext(), "Got Location",
                Toast.LENGTH_LONG).show();

            try {
                SharedPreferences locationpref = getApplication()
                    .getSharedPreferences("location", MODE_WORLD_READABLE);
                SharedPreferences.Editor prefsEditor = locationpref.edit();
                prefsEditor.putString("Longitude", Longitude + "");
                prefsEditor.putString("Latitude", Latitude + "");
                prefsEditor.commit();
                System.out.println("SHARE PREFERENCE ME PUT KAR DIYA.");
            } catch (Exception e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
        }
    };

    // handler for the background updating

}

Moja lokacja

public class MyLocation {

    Timer timer1;
    LocationManager lm;
    LocationResult locationResult;
    boolean gps_enabled=false;
    boolean network_enabled=false;

    public boolean getLocation(Context context, LocationResult result)
    {
        //I use LocationResult callback class to pass location value from MyLocation to user code.
        locationResult=result;
        if(lm==null)
            lm = (LocationManager) context.getSystemService(Context.LOCATION_SERVICE);

        //exceptions will be thrown if provider is not permitted.
        try{gps_enabled=lm.isProviderEnabled(LocationManager.GPS_PROVIDER);}catch(Exception ex){}
        try{network_enabled=lm.isProviderEnabled(LocationManager.NETWORK_PROVIDER);}catch(Exception ex){}

        //Toast.makeText(context, gps_enabled+" "+network_enabled,     Toast.LENGTH_LONG).show();

        //don't start listeners if no provider is enabled
        if(!gps_enabled && !network_enabled)
            return false;

        if(gps_enabled)
            lm.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0, 0, locationListenerGps);
        if(network_enabled)
            lm.requestLocationUpdates(LocationManager.NETWORK_PROVIDER, 0, 0, locationListenerNetwork);
        timer1=new Timer();


        timer1.schedule(new GetLastLocation(), 10000);
    //    Toast.makeText(context, " Yaha Tak AAya", Toast.LENGTH_LONG).show();
        return true;
    }

    LocationListener locationListenerGps = new LocationListener() {
        public void onLocationChanged(Location location) {
            timer1.cancel();
            locationResult.gotLocation(location);
            lm.removeUpdates(this);
            lm.removeUpdates(locationListenerNetwork);
        }
        public void onProviderDisabled(String provider) {}
        public void onProviderEnabled(String provider) {}
        public void onStatusChanged(String provider, int status, Bundle extras) {}
    };

    LocationListener locationListenerNetwork = new LocationListener() {
        public void onLocationChanged(Location location) {
            timer1.cancel();
            locationResult.gotLocation(location);
            lm.removeUpdates(this);
            lm.removeUpdates(locationListenerGps);
        }
        public void onProviderDisabled(String provider) {}
        public void onProviderEnabled(String provider) {}
        public void onStatusChanged(String provider, int status, Bundle extras) {}
    };

    class GetLastLocation extends TimerTask {
        @Override

        public void run() {

            //Context context = getClass().getgetApplicationContext();
             Location net_loc=null, gps_loc=null;
             if(gps_enabled)
                 gps_loc=lm.getLastKnownLocation(LocationManager.GPS_PROVIDER);
             if(network_enabled)
                 net_loc=lm.getLastKnownLocation(LocationManager.NETWORK_PROVIDER);

             //if there are both values use the latest one
             if(gps_loc!=null && net_loc!=null){
                 if(gps_loc.getTime()>net_loc.getTime())
                     locationResult.gotLocation(gps_loc);
                 else
                     locationResult.gotLocation(net_loc);
                 return;
             }

             if(gps_loc!=null){
                 locationResult.gotLocation(gps_loc);
                 return;
             }
             if(net_loc!=null){
                 locationResult.gotLocation(net_loc);
                 return;
             }
             locationResult.gotLocation(null);
        }
    }

    public static abstract class LocationResult{
        public abstract void gotLocation(Location location);
    }
}

Z googlerzeczami zmienia się bardzo często: żadna z poprzednich odpowiedzi nie działała dla mnie.

na podstawie tego szkolenia google tutaj jest to, jak to robisz za pomocą

dostawca bezpiecznej lokalizacji

wymaga to skonfigurowania usług Google Play

Klasa aktywności

public class GPSTrackerActivity extends AppCompatActivity implements
    GoogleApiClient.ConnectionCallbacks,     
 GoogleApiClient.OnConnectionFailedListener {

private GoogleApiClient mGoogleApiClient;
Location mLastLocation;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    if (mGoogleApiClient == null) {
        mGoogleApiClient = new GoogleApiClient.Builder(this)
                .addConnectionCallbacks(this)
                .addOnConnectionFailedListener(this)
                .addApi(LocationServices.API)
                .build();
    }

}

protected void onStart() {
    mGoogleApiClient.connect();
    super.onStart();
}

protected void onStop() {
    mGoogleApiClient.disconnect();
    super.onStop();
}

@Override
public void onConnected(Bundle bundle) {
    try {

        mLastLocation = LocationServices.FusedLocationApi.getLastLocation(
                mGoogleApiClient);
        if (mLastLocation != null) {
            Intent intent = new Intent();
            intent.putExtra("Longitude", mLastLocation.getLongitude());
            intent.putExtra("Latitude", mLastLocation.getLatitude());
            setResult(1,intent);
            finish();

        }
    } catch (SecurityException e) {

    }

}

@Override
public void onConnectionSuspended(int i) {

}

@Override
public void onConnectionFailed(ConnectionResult connectionResult) {

}
}

stosowanie

w tobie aktywność

 Intent intent = new Intent(context, GPSTrackerActivity.class);
    startActivityForResult(intent,1);

I ta metoda

 protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    super.onActivityResult(requestCode, resultCode, data);
    if(requestCode == 1){
        Bundle extras = data.getExtras();
        Double longitude = extras.getDouble("Longitude");
        Double latitude = extras.getDouble("Latitude");
    }
}

możesz uzyskać Current latlng za pomocą tego

`

  public class MainActivity extends ActionBarActivity {
  private LocationManager locationManager;
  private String provider;
  private MyLocationListener mylistener;
  private Criteria criteria;
@TargetApi(Build.VERSION_CODES.HONEYCOMB)
@SuppressLint("NewApi")
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);


             locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
              // Define the criteria how to select the location provider
              criteria = new Criteria();
              criteria.setAccuracy(Criteria.ACCURACY_COARSE);   //default

              // user defines the criteria

              criteria.setCostAllowed(false); 
              // get the best provider depending on the criteria
              provider = locationManager.getBestProvider(criteria, false);

              // the last known location of this provider
              Location location = locationManager.getLastKnownLocation(provider);

              mylistener = new MyLocationListener();

              if (location != null) {
                  mylistener.onLocationChanged(location);
              } else {
                  // leads to the settings because there is no last known location
                  Intent intent = new Intent(Settings.ACTION_LOCATION_SOURCE_SETTINGS);
                  startActivity(intent);
              }
              // location updates: at least 1 meter and 200millsecs change
              locationManager.requestLocationUpdates(provider, 200, 1, mylistener);
            String a=""+location.getLatitude();
            Toast.makeText(getApplicationContext(), a, 222).show();

}

private class MyLocationListener implements LocationListener {

      @Override
      public void onLocationChanged(Location location) {
        // Initialize the location fields



          Toast.makeText(MainActivity.this,  ""+location.getLatitude()+location.getLongitude(),
                    Toast.LENGTH_SHORT).show()  

      }

      @Override
      public void onStatusChanged(String provider, int status, Bundle extras) {
          Toast.makeText(MainActivity.this, provider + "'s status changed to "+status +"!",
                    Toast.LENGTH_SHORT).show();
      }

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

      }

      @Override
      public void onProviderDisabled(String provider) {
          Toast.makeText(MainActivity.this, "Provider " + provider + " disabled!",
            Toast.LENGTH_SHORT).show();
      }
  }         

`

Powyższe rozwiązania są również poprawne, ale jakiś czas, jeśli lokalizacja jest pusta, to powoduje awarię aplikacji lub nie działa poprawnie. Najlepszym sposobem na uzyskanie szerokości i długości geograficznej Androida jest:

 Geocoder geocoder;
     String bestProvider;
     List<Address> user = null;
     double lat;
     double lng;

    LocationManager lm = (LocationManager) activity.getSystemService(Context.LOCATION_SERVICE);

     Criteria criteria = new Criteria();
     bestProvider = lm.getBestProvider(criteria, false);
     Location location = lm.getLastKnownLocation(bestProvider);

     if (location == null){
         Toast.makeText(activity,"Location Not found",Toast.LENGTH_LONG).show();
      }else{
        geocoder = new Geocoder(activity);
        try {
            user = geocoder.getFromLocation(location.getLatitude(), location.getLongitude(), 1);
        lat=(double)user.get(0).getLatitude();
        lng=(double)user.get(0).getLongitude();
        System.out.println(" DDD lat: " +lat+",  longitude: "+lng);

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

Najlepszym sposobem jest

Dodaj plik manifestu uprawnień

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

Następnie możesz uzyskać lokalizację GPS lub jeśli lokalizacja GPS nie jest dostępna, funkcja zwraca lokalizację SIEĆ

    public static Location getLocationWithCheckNetworkAndGPS(Context mContext) {
    LocationManager lm = (LocationManager)
            mContext.getSystemService(Context.LOCATION_SERVICE);
    assert lm != null;
    isGpsEnabled = lm.isProviderEnabled(LocationManager.GPS_PROVIDER);
    isNetworkLocationEnabled = lm.isProviderEnabled(LocationManager.NETWORK_PROVIDER);

    Location networkLoacation = null, gpsLocation = null, finalLoc = null;
    if (isGpsEnabled)
        if (ActivityCompat.checkSelfPermission(mContext, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(mContext, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {

            return null;
        }gpsLocation = lm.getLastKnownLocation(LocationManager.GPS_PROVIDER);
    if (isNetworkLocationEnabled)
        networkLoacation = lm.getLastKnownLocation(LocationManager.NETWORK_PROVIDER);

    if (gpsLocation != null && networkLoacation != null) {

        //smaller the number more accurate result will
        if (gpsLocation.getAccuracy() > networkLoacation.getAccuracy())
            return finalLoc = networkLoacation;
        else
            return finalLoc = gpsLocation;

    } else {

        if (gpsLocation != null) {
            return finalLoc = gpsLocation;
        } else if (networkLoacation != null) {
            return finalLoc = networkLoacation;
        }
    }
    return finalLoc;
}

Aktualizacja 2020: Używanie Kotlin Coroutine, aby uzyskać Lat, język i adres urządzenia

To stare pytanie i większość odpowiedzi jest nieaktualna. Oto jak teraz to robię moje aplikacje:

Ta klasa pomaga w śledzeniu lokalizacji urządzenia i zwróceniu listy adresów urządzeń za pomocą geokodowania. Umieść go w klasie użytkowej

import android.Manifest
import android.app.AlertDialog
import android.content.Context
import android.content.Intent
import android.content.pm.PackageManager
import android.location.*
import android.os.Bundle
import android.provider.Settings
import android.util.Log
import androidx.core.app.ActivityCompat
import com.bmw.weatherapp.R
import kotlinx.coroutines.*
import java.io.IOException
import java.lang.ref.WeakReference
import java.util.*
import kotlin.coroutines.CoroutineContext

/**
 * Use GPS or Network Provider to get Device Location
 */
class DeviceLocationTracker(context: Context, deviceLocationListener: DeviceLocationListener) : LocationListener, CoroutineScope {
    private var deviceLocation: Location? = null
    private val context: WeakReference<Context>
    private var locationManager: LocationManager? = null
    private var deviceLocationListener: DeviceLocationListener
    private val job = Job()
    override val coroutineContext: CoroutineContext
        get() = job + Dispatchers.Main

    init {
        this.context = WeakReference(context)
        this.deviceLocationListener = deviceLocationListener
        initializeLocationProviders()
    }

    private fun initializeLocationProviders() {
        //Init Location Manger if not already initialized
        if (null == locationManager) {
            locationManager = context.get()
                    ?.getSystemService(Context.LOCATION_SERVICE) as LocationManager
        }
        locationManager?.apply {
            // flag for GPS status
            val isGPSEnabled = isProviderEnabled(LocationManager.GPS_PROVIDER)

            // flag for network status
            val isNetworkEnabled = isProviderEnabled(LocationManager.PASSIVE_PROVIDER)

            //If we have permission
            if (ActivityCompat.checkSelfPermission(context.get()!!, Manifest.permission.ACCESS_FINE_LOCATION)
                    == PackageManager.PERMISSION_GRANTED &&
                    ActivityCompat.checkSelfPermission(context.get()!!, Manifest.permission.ACCESS_COARSE_LOCATION)
                    == PackageManager.PERMISSION_GRANTED) {

                //First Try GPS
                if (isGPSEnabled) {
                    requestLocationUpdates(
                            LocationManager.GPS_PROVIDER,
                            UPDATE_FREQUENCY_TIME,
                            UPDATE_FREQUENCY_DISTANCE.toFloat(), this@DeviceLocationTracker)
                    deviceLocation = locationManager!!.getLastKnownLocation(LocationManager.GPS_PROVIDER)
                } else {
                    // Show alert to open GPS
                    context.get()?.apply {
                        AlertDialog.Builder(this)
                                .setTitle(getString(R.string.title_enable_gps))
                                .setMessage(getString(R.string.desc_enable_gps))
                                .setPositiveButton(getString(R.string.btn_settings)
                                ) { dialog, which ->
                                    val intent = Intent(
                                            Settings.ACTION_LOCATION_SOURCE_SETTINGS)
                                    startActivity(intent)
                                }.setNegativeButton(getString(R.string.btn_cancel))
                                { dialog, which -> dialog.cancel() }.show()
                    }
                }

                //If failed try using NetworkManger
                if(null==deviceLocation && isNetworkEnabled) {
                    requestLocationUpdates(
                            LocationManager.PASSIVE_PROVIDER,
                            0, 0f,
                            this@DeviceLocationTracker)
                    deviceLocation = locationManager!!.getLastKnownLocation(LocationManager.NETWORK_PROVIDER)
                }
            }
        }
    }

    /**
     * Stop using GPS listener
     * Must call this function to stop using GPS
     */
    fun stopUpdate() {
        if (locationManager != null) {
            locationManager!!.removeUpdates(this@DeviceLocationTracker)
        }
    }

    override fun onLocationChanged(newDeviceLocation: Location) {
        deviceLocation = newDeviceLocation
        launch(Dispatchers.Main) {
            withContext(Dispatchers.IO) {
                var addressList: List<Address?>? = null
                try {
                    addressList = Geocoder(context.get(),
                            Locale.ENGLISH).getFromLocation(
                            newDeviceLocation.latitude,
                            newDeviceLocation.longitude,
                            1)
                    deviceLocationListener.onDeviceLocationChanged(addressList)
                    Log.i(TAG, "Fetch address list"+addressList)

                } catch (e: IOException) {
                    Log.e(TAG, "Failed Fetched Address List")
                }
            }
        }
    }

    override fun onProviderDisabled(provider: String) {}
    override fun onProviderEnabled(provider: String) {}
    override fun onStatusChanged(provider: String, status: Int, extras: Bundle) {}
    interface DeviceLocationListener {
        fun onDeviceLocationChanged(results: List<Address>?)
    }

    companion object {
        // The minimum distance to change Updates in meters
        private const val UPDATE_FREQUENCY_DISTANCE: Long = 1 // 10 meters

        // The minimum time between updates in milliseconds
        private const val UPDATE_FREQUENCY_TIME: Long = 1 // 1 minute
        private val TAG = DeviceLocationTracker::class.java.simpleName
    }
}

Dodaj ciągi do okna dialogowego alertu w przypadku wyłączenia GPS

   <string name="title_enable_gps">Enable GPS</string>
   <string name="desc_enable_gps">GPS is not enabled. Do you want to go to settings menu?</string>
    <string name="btn_settings">Open Settings</string>
    <string name="btn_cancel">Cancel</string>

Dodaj te uprawnienia do manifestu Androida i poproś o nie przy uruchamianiu aplikacji

<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.ACCESS_GPS" />
<uses-permission android:name="android.permission.ACCESS_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />

Stosowanie

Wdrażaj DeviceLocationListenerw swojej Activity/Fragmentklasie

  class MainActivity : AppCompatActivity, DeviceLocationTracker.DeviceLocationListener {
    

Zastąp połączenie onDeviceLocationChangedzwrotne. Otrzymasz aktualną lokalizację wonDeviceLocationChanged

  override fun onDeviceLocationChanged(results: List<Address>?) {
        val currntLocation = results?.get(0);
        currntLocation?.apply {
             currentlLat = latitude
             currentLng = longitude
             Country = countryCode
             cityName = getAddressLine(0)
          
        }

    }

Aby rozpocząć śledzenie, utwórz DeviceLocationTrackerobiekt onCreatemetodą swoją. Przekaż Activityjako Kontekst i to jako DeviceLocationListener.

private lateinit var deviceLocationTracker: DeviceLocationTracker

override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)
        ...
        deviceLocationTracker= DeviceLocationTracker(this, this)

To wszystko, teraz zaczniesz otrzymywać aktualizację lokalizacji onDeviceLocationChanged.