Apa cara paling sederhana dan paling kuat untuk mendapatkan lokasi pengguna saat ini di Android?


811

The LocationManagerAPI pada Android tampaknya seperti itu sedikit rasa sakit untuk menggunakan untuk aplikasi yang hanya membutuhkan perkiraan sesekali dan kasar dari lokasi pengguna.

Aplikasi yang sedang saya kerjakan sebenarnya bukan aplikasi lokasi semata, tetapi perlu mendapatkan lokasi pengguna untuk menampilkan daftar bisnis terdekat. Tidak perlu khawatir tentang apakah pengguna bergerak atau semacamnya.

Inilah yang ingin saya lakukan:

  1. Tunjukkan pada pengguna daftar lokasi terdekat.
  2. Preload lokasi pengguna sehingga saat saya membutuhkannya di ActivityX, itu akan tersedia.
  3. Saya tidak terlalu peduli tentang akurasi atau frekuensi pembaruan. Hanya mengambil satu lokasi saja sudah cukup selama tidak jauh. Mungkin jika saya ingin menjadi mewah, saya akan memperbarui lokasi setiap beberapa menit sekali, tetapi itu bukan prioritas besar.
  4. Bekerja untuk perangkat apa pun asalkan memiliki GPS atau penyedia Lokasi Jaringan.

Sepertinya seharusnya tidak sesulit itu, tetapi bagi saya tampaknya saya harus memutar dua penyedia lokasi yang berbeda (GPS dan JARINGAN) dan mengelola siklus hidup masing-masing. Bukan hanya itu, tetapi saya harus menduplikasi kode yang sama dalam beberapa kegiatan untuk memenuhi # 2. Saya telah mencoba menggunakan getBestProvider()di masa lalu untuk memotong solusi hanya dengan menggunakan satu penyedia lokasi, tetapi itu tampaknya hanya memberi Anda penyedia "teoritis" terbaik daripada penyedia yang benar-benar akan memberi Anda hasil terbaik.

Apakah ada cara yang lebih sederhana untuk mencapai ini?


5
Di sini Anda dapat menemukan tutorial langkah demi langkah dengan kode sampel untuk GPS, tepuk tangan !!
swiftBoy

1
Anda bisa menggunakan perpustakaan sederhana yang abstrak segala hal yang harus terjadi "di bawah tenda": github.com/delight-im/Android-SimpleLocation
gak

Pada tahun 2018, ini contoh FusedLocationProviderClient untuk pembaruan lokasi latar belakang freakyjolly.com/…
Code Spy

dapatkan jawabannya di Kotlin di sini: stackoverflow.com/a/53800632/2201814
MHSFisher

Anda dapat menggunakan teknik menangkap lokasi menyatu di android.
SIVAKUMAR.J

Jawaban:


946

Inilah yang saya lakukan:

  1. Pertama-tama saya memeriksa penyedia apa yang diaktifkan. Beberapa mungkin dinonaktifkan pada perangkat, beberapa mungkin dinonaktifkan dalam manifes aplikasi.
  2. Jika ada penyedia yang tersedia, saya memulai pendengar lokasi dan penghitung waktu habis. Ini 20 detik dalam contoh saya, mungkin tidak cukup untuk GPS sehingga Anda dapat memperbesarnya.
  3. Jika saya mendapat pembaruan dari pendengar lokasi saya menggunakan nilai yang disediakan. Saya menghentikan pendengar dan timer.
  4. Jika saya tidak mendapatkan pembaruan dan penghitung waktu berlalu, saya harus menggunakan nilai terakhir yang diketahui.
  5. Saya mengambil nilai terakhir yang diketahui dari penyedia yang tersedia dan memilih yang terbaru dari mereka.

Inilah cara saya menggunakan kelas saya:

LocationResult locationResult = new LocationResult(){
    @Override
    public void gotLocation(Location location){
        //Got the location!
    }
};
MyLocation myLocation = new MyLocation();
myLocation.getLocation(this, locationResult);

Dan inilah kelas MyLocation:

import java.util.Timer;
import java.util.TimerTask;
import android.content.Context;
import android.location.Location;
import android.location.LocationListener;
import android.location.LocationManager;
import android.os.Bundle;

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){}

        //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(), 20000);
        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() {
             lm.removeUpdates(locationListenerGps);
             lm.removeUpdates(locationListenerNetwork);

             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);
    }
}

Seseorang mungkin juga ingin memodifikasi logika saya. Misalnya, jika Anda mendapatkan pembaruan dari penyedia Jaringan jangan berhenti pendengar tetapi terus menunggu. GPS memberikan data yang lebih akurat sehingga layak untuk ditunggu. Jika penghitung waktu berlalu dan Anda mendapat pembaruan dari Jaringan tetapi tidak dari GPS, maka Anda dapat menggunakan nilai yang disediakan dari Jaringan.

Satu lagi pendekatan adalah dengan menggunakan LocationClient http://developer.android.com/training/location/retrieve-current.html . Tetapi itu membutuhkan Google Play Services apk untuk diinstal pada perangkat pengguna.


7
Sebagai catatan, pemahaman saya adalah bahwa Google umumnya merekomendasikan untuk tidak menggunakan android: configChanges. Alih-alih, saya menggunakan solusi yang mendaftarkan timertasks dan membatalkannya diDestroy.
emmby

5
Digunakan kelas ini di aplikasi sederhana saya dan bekerja seperti juara. Terima kasih telah mempostingnya!
Alex Pritchard

46
Ini bekerja dengan baik untuk saya! Namun, aktivitas yang saya gunakan ini untuk saya memeriksa lokasi di resume. Jika pengguna mundur dari aktivitas sebelum lokasi dikembalikan, aplikasi akan macet. Saya memperbaikinya dengan menambahkan metode ini ke MyLocation Anda class.public batal cancelTimer () {timer1.cancel (); lm.removeUpdates (locationListenerGps); lm.removeUpdates (locationListenerNetwork); } Saya menyebutnya onPause () dan itu memperbaiki crash.
dbaugh

14
Hai, bisakah saya menggunakan kode Anda dalam aplikasi saya untuk tujuan komersial. Jika Anda memiliki keluhan tentang itu, beri tahu saya.
TRONZ

87
@ TRONZ Tidak masalah, silakan gunakan untuk tujuan apa pun.
Fedor

43

Setelah mencari implementasi terbaik cara mendapatkan lokasi pengguna terbaik yang tepat, saya berhasil menggabungkan semua metode terbaik dan menghasilkan kelas berikut:

/**
 * Retrieve accurate location from GPS or network services. 
 * 
 *
 * Class usage example:
 * 
 * public void onCreate(Bundle savedInstanceState) {
 *      ...
 *      my_location = new MyLocation();
 *      my_location.init(main.this, locationResult);
 * }
 * 
 * 
 * public LocationResult locationResult = new LocationResult(){
 *      @Override
 *      public void gotLocation(final Location location){
 *          // do something
 *          location.getLongitude();
 *          location.getLatitude();
 *      }
 *  };
 */
class MyLocation{

    /**
     * If GPS is enabled. 
     * Use minimal connected satellites count.
     */
    private static final int min_gps_sat_count = 5;

    /**
     * Iteration step time.
     */
    private static final int iteration_timeout_step = 500;

    LocationResult locationResult;
    private Location bestLocation = null;
    private Handler handler = new Handler();
    private LocationManager myLocationManager; 
    public Context context;

    private boolean gps_enabled = false;

    private int counts    = 0;
    private int sat_count = 0;

    private Runnable showTime = new Runnable() {

         public void run() {
            boolean stop = false;
            counts++;
            System.println("counts=" + counts);

            //if timeout (1 min) exceeded, stop tying
            if(counts > 120){
                stop = true;
            }

            //update last best location
            bestLocation = getLocation(context);

            //if location is not ready or don`t exists, try again
            if(bestLocation == null && gps_enabled){
                System.println("BestLocation not ready, continue to wait");
                handler.postDelayed(this, iteration_timeout_step);
            }else{
                //if best location is known, calculate if we need to continue to look for better location
                //if gps is enabled and min satellites count has not been connected or min check count is smaller then 4 (2 sec)  
                if(stop == false && !needToStop()){
                    System.println("Connected " + sat_count + " sattelites. continue waiting..");
                    handler.postDelayed(this, iteration_timeout_step);
                }else{
                    System.println("#########################################");
                    System.println("BestLocation finded return result to main. sat_count=" + sat_count);
                    System.println("#########################################");

                    // removing all updates and listeners
                    myLocationManager.removeUpdates(gpsLocationListener);
                    myLocationManager.removeUpdates(networkLocationListener);    
                    myLocationManager.removeGpsStatusListener(gpsStatusListener);
                    sat_count = 0;

                    // send best location to locationResult
                    locationResult.gotLocation(bestLocation);
                }
            }
         }
    };

    /**
     * Determine if continue to try to find best location
     */
    private Boolean needToStop(){

        if(!gps_enabled){
                          return true;
                     }
          else if(counts <= 4){
                return false;
            }
            if(sat_count < min_gps_sat_count){
                //if 20-25 sec and 3 satellites found then stop
                if(counts >= 40 && sat_count >= 3){
                    return true;
                }
                return false;
            }
        }
        return true;
    }

    /**
     * Best location abstract result class
     */
    public static abstract class LocationResult{
         public abstract void gotLocation(Location location);
     }

    /**
     * Initialize starting values and starting best location listeners
     * 
     * @param Context ctx
     * @param LocationResult result
     */
    public void init(Context ctx, LocationResult result){
        context = ctx;
        locationResult = result;

        myLocationManager = (LocationManager) context.getSystemService(Context.LOCATION_SERVICE);

        gps_enabled = (Boolean) myLocationManager.isProviderEnabled(LocationManager.GPS_PROVIDER);

        bestLocation = null;
        counts = 0;

        // turning on location updates
        myLocationManager.requestLocationUpdates("network", 0, 0, networkLocationListener);
        myLocationManager.requestLocationUpdates("gps", 0, 0, gpsLocationListener);
        myLocationManager.addGpsStatusListener(gpsStatusListener);

        // starting best location finder loop
        handler.postDelayed(showTime, iteration_timeout_step);
    }

    /**
     * GpsStatus listener. OnChainged counts connected satellites count.
     */
    public final GpsStatus.Listener gpsStatusListener = new GpsStatus.Listener() {
        public void onGpsStatusChanged(int event) {

             if(event == GpsStatus.GPS_EVENT_SATELLITE_STATUS){
                try {
                    // Check number of satellites in list to determine fix state
                     GpsStatus status = myLocationManager.getGpsStatus(null);
                     Iterable<GpsSatellite>satellites = status.getSatellites();

                     sat_count = 0;

                     Iterator<GpsSatellite>satI = satellites.iterator();
                     while(satI.hasNext()) {
                         GpsSatellite satellite = satI.next();
                         System.println("Satellite: snr=" + satellite.getSnr() + ", elevation=" + satellite.getElevation());                         
                         sat_count++;
                     }
                } catch (Exception e) {
                    e.printStackTrace();
                    sat_count = min_gps_sat_count + 1;
                }

                 System.println("#### sat_count = " + sat_count);
             }
         }
    };

    /**
     * Gps location listener.
     */
    public final LocationListener gpsLocationListener = new LocationListener(){
        @Override
         public void onLocationChanged(Location location){

        }
         public void onProviderDisabled(String provider){}
         public void onProviderEnabled(String provider){}
         public void onStatusChanged(String provider, int status, Bundle extras){}
    }; 

    /**
     * Network location listener.
     */
    public final LocationListener networkLocationListener = new LocationListener(){
        @Override
         public void onLocationChanged(Location location){

        }
         public void onProviderDisabled(String provider){}
         public void onProviderEnabled(String provider){}
         public void onStatusChanged(String provider, int status, Bundle extras){}
    }; 


    /**
     * Returns best location using LocationManager.getBestProvider()
     * 
     * @param context
     * @return Location|null
     */
    public static Location getLocation(Context context){
        System.println("getLocation()");

        // fetch last known location and update it
        try {
            LocationManager lm = (LocationManager) context.getSystemService(Context.LOCATION_SERVICE);

            Criteria criteria = new Criteria();
            criteria.setAccuracy(Criteria.ACCURACY_FINE);
             criteria.setAltitudeRequired(false);
             criteria.setBearingRequired(false);
             criteria.setCostAllowed(true);
             String strLocationProvider = lm.getBestProvider(criteria, true);

             System.println("strLocationProvider=" + strLocationProvider);
             Location location = lm.getLastKnownLocation(strLocationProvider);
             if(location != null){
                return location;
             }
             return null;
        } catch (Exception e) {
            e.printStackTrace();
            return null;
        }
    }
}

Kelas ini mencoba terhubung ke min_gps_sat_countsatelit jika GPS diaktifkan. Lain mengembalikan LocationManager.getBestProvider()lokasi. Periksa kodenya!


2
Ini akan berhenti setelah 1 menit atau ketika akan menemukan lokasi.
wormhit

@wormhit Dalam kasus saya, ini tidak berhenti setelah 120 hitungan. Saya telah mengaktifkan GPS dan penyedia jaringan juga tersedia juga saya telah menambahkan permissio yang sesuai dalam file Menifest.
Narendra Pal

Masukkan saja ini sebagai impor:import java.util.Iterator; import android.content.Context; import android.location.Criteria; import android.location.GpsSatellite; import android.location.GpsStatus; import android.location.Location; import android.location.LocationListener; import android.location.LocationManager; import android.os.Bundle; import android.os.Handler;
Jackie Chan

31

Dengan solusi Fedor, saya telah mengalami beberapa kali eksekusi callback gotLocation. Tampaknya karena kondisi balapan dalam LocationListener.onLocationChangedmetode override , ketika metode gotLocation 'cukup panjang' . Saya tidak yakin, tapi saya kira removeUpdatesmencegah enqueueing pesan baru di antrian Looper, tetapi itu tidak menghapus yang sudah enqueued tetapi belum dikonsumsi. Karenanya kondisi balapan.

Untuk mengurangi kemungkinan perilaku yang salah ini, mungkin untuk memanggil removeUpdates sebelum menjalankan event onLocationChanged, tetapi masih kami memiliki kondisi balapan.

Solusi terbaik yang saya temukan adalah untuk menggantikan requestLocationUpdatesdengan requestSingleUpdate.

Ini adalah versi saya, berdasarkan solusi Fedor, menggunakan Handler untuk mengirim pesan ke utas looper:

public class LocationResolver {
    private Timer timer;
    private LocationManager locationManager;
    private LocationResult locationResult;
    private boolean gpsEnabled = false;
    private boolean networkEnabled = false;
    private Handler locationTimeoutHandler;

    private final Callback locationTimeoutCallback = new Callback() {
        public boolean handleMessage(Message msg) {
            locationTimeoutFunc();
            return true;
        }

        private void locationTimeoutFunc() {   
            locationManager.removeUpdates(locationListenerGps);
            locationManager.removeUpdates(locationListenerNetwork);

            Location networkLocation = null, gpsLocation = null;
            if (gpsEnabled)
                gpsLocation = locationManager.getLastKnownLocation(LocationManager.GPS_PROVIDER);
            if (networkEnabled)
                networkLocation = locationManager.getLastKnownLocation(LocationManager.NETWORK_PROVIDER);

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

            if (gpsLocation != null) {
                locationResult.gotLocation(gpsLocation);
                return;
            }
            if (networkLocation != null) {
                locationResult.gotLocation(networkLocation);
                return;
            }
            locationResult.gotLocation(null);           
        }
    };
    private final LocationListener locationListenerGps = new LocationListener() {
        public void onLocationChanged(Location location) {              
            timer.cancel();
            locationResult.gotLocation(location);
            locationManager.removeUpdates(this);
            locationManager.removeUpdates(locationListenerNetwork);
        }

        public void onProviderDisabled(String provider) {
        }

        public void onProviderEnabled(String provider) {
        }

        public void onStatusChanged(String provider, int status, Bundle extras) {
        }
    };
    private final LocationListener locationListenerNetwork = new LocationListener() {
        public void onLocationChanged(Location location) {    
            timer.cancel(); 
            locationResult.gotLocation(location);
            locationManager.removeUpdates(this);
            locationManager.removeUpdates(locationListenerGps);
        }

        public void onProviderDisabled(String provider) {
        }

        public void onProviderEnabled(String provider) {
        }

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

    public void prepare() {
        locationTimeoutHandler = new Handler(locationTimeoutCallback);
    }

    public synchronized boolean getLocation(Context context, LocationResult result, int maxMillisToWait) {
        locationResult = result;
        if (locationManager == null)
            locationManager = (LocationManager) context.getSystemService(Context.LOCATION_SERVICE);

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

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

        if (gpsEnabled)
            locationManager.requestSingleUpdate(LocationManager.GPS_PROVIDER, locationListenerGps, Looper.myLooper());
            //locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0, 0, locationListenerGps);
        if (networkEnabled)
            locationManager.requestSingleUpdate(LocationManager.NETWORK_PROVIDER, locationListenerNetwork, Looper.myLooper());
            //locationManager.requestLocationUpdates(LocationManager.NETWORK_PROVIDER, 0, 0, locationListenerNetwork);

        timer = new Timer();
        timer.schedule(new GetLastLocationTask(), maxMillisToWait);
        return true;
    }

    private class GetLastLocationTask extends TimerTask {
        @Override
        public void run() { 
            locationTimeoutHandler.sendEmptyMessage(0);
        }
    }

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

Saya menggunakan kelas ini dari utas looper yang dikustomisasi, seperti yang berikut:

public class LocationGetter {
    private final Context context;
    private Location location = null;
    private final Object gotLocationLock = new Object();
    private final LocationResult locationResult = new LocationResult() {            
        @Override
        public void gotLocation(Location location) {
            synchronized (gotLocationLock) {
                LocationGetter.this.location = location;
                gotLocationLock.notifyAll();
                Looper.myLooper().quit();
            }
        }
    };

    public LocationGetter(Context context) {
        if (context == null)
            throw new IllegalArgumentException("context == null");

        this.context = context;
    }

    public synchronized Coordinates getLocation(int maxWaitingTime, int updateTimeout) {
        try {
            final int updateTimeoutPar = updateTimeout;
            synchronized (gotLocationLock) {            
                new Thread() {
                    public void run() {
                        Looper.prepare();
                        LocationResolver locationResolver = new LocationResolver();
                        locationResolver.prepare();
                        locationResolver.getLocation(context, locationResult, updateTimeoutPar);
                        Looper.loop();
                    }
                }.start();

                gotLocationLock.wait(maxWaitingTime);
            }
        } catch (InterruptedException e1) {
            e1.printStackTrace();
        }

        if (location != null)
            coordinates = new Coordinates(location.getLatitude(), location.getLongitude());
        else
            coordinates = Coordinates.UNDEFINED;
        return coordinates; 
    }
}

di mana Koordinat adalah kelas sederhana dengan dua properti: lintang dan bujur.


4
Poin menarik, bagaimanapun, requestSingleUpdate membutuhkan API Level 9. Tapi +1 untuk menunjukkan itu.
Eduardo

@Eduardo: kemungkinan lain adalah untuk mengeksekusi kode tugas menggunakan Handler yang terkait dengan looper dan memanggilnya dengan mengirim pesan (kosong) ke handler. Karena pesan diserialisasi pada antrian looper, Anda dapat menghapus secara manual (misalnya menggunakan bendera) kondisi balapan. Itu tidak memerlukan API Livel 9, tetapi perlu menggunakan looper secara eksplisit.
differenziale

17

Saya telah membuat aplikasi kecil dengan deskripsi langkah demi langkah untuk mendapatkan lokasi saat ini koordinat GPS.

masukkan deskripsi gambar di sini

Lengkapi contoh kode sumber di URL di bawah ini:


Dapatkan Koordinat Lokasi Saat Ini, Nama Kota - di Android


Lihat Cara kerjanya:

  • Yang perlu kita lakukan adalah menambahkan izin ini dalam file manifes

    <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION">  
    </uses-permission>
  • dan buat instance LocationManager seperti ini

    LocationManager locationManager = (LocationManager) 
                                      getSystemService(Context.LOCATION_SERVICE);
  • Periksa GPS diaktifkan atau tidak

  • kemudian laksanakan LocationListener dan Dapatkan Koordinat

    LocationListener locationListener = new MyLocationListener();  
    locationManager.requestLocationUpdates(  
    LocationManager.GPS_PROVIDER, 5000, 10, locationListener);
  • di sini adalah kode contoh yang harus dilakukan


/*----------Listener class to get coordinates ------------- */
private class MyLocationListener implements LocationListener {

    @Override
    public void onLocationChanged(Location loc) {
        editLocation.setText("");
        pb.setVisibility(View.INVISIBLE);
        Toast.makeText(
            getBaseContext(),
            "Location changed: Lat: " + loc.getLatitude() + " Lng: "
                + loc.getLongitude(), Toast.LENGTH_SHORT).show();
        String longitude = "Longitude: " + loc.getLongitude();
        Log.v(TAG, longitude);
        String latitude = "Latitude: " + loc.getLatitude();
        Log.v(TAG, latitude);
        /*-------to get City-Name from coordinates -------- */
        String cityName = null;
        Geocoder gcd = new Geocoder(getBaseContext(), Locale.getDefault());
        List<Address> addresses;
        try {
            addresses = gcd.getFromLocation(loc.getLatitude(),
                loc.getLongitude(), 1);
            if (addresses.size() > 0)
                System.out.println(addresses.get(0).getLocality());
            cityName = addresses.get(0).getLocality();
        } catch (IOException e) {
            e.printStackTrace();
        }
        String s = longitude + "\n" + latitude + "\n\nMy Current City is: "
            + cityName;
        editLocation.setText(s);
    }

    @Override
    public void onProviderDisabled(String provider) {}

    @Override
    public void onProviderEnabled(String provider) {}

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

1
lokasi harus diubah. tidak sambil berdiri.

15

Anda selalu bisa menggunakan LocationManager.getLastKnownLocation () tapi seperti yang dikatakan itu bisa jadi ketinggalan zaman.

Dan cara sederhana untuk mendapatkan lokasi umum bisa mendaftar untuk jaringan (biasanya cukup cepat).

LocationManager locationManager = (LocationManager) this.getSystemService(Context.LOCATION_SERVICE);
locationManager.requestLocationUpdates(
     LocationManager.NETWORK_PROVIDER, 1000, 1000, this);

dan kemudian lakukan

locationManager.removeUpdates(this);

dalam onLocationChanged()metode pendengar.


Terima kasih BrennaSoft. Saya telah menemukan bahwa getLastKnownLocation () seringkali tidak aktif, dan karenanya tidak benar-benar berfungsi sebagai solusi mandiri. Juga, tidak jelas bagi saya bahwa hanya mengandalkan NETWORK_PROVIDER akan bekerja, karena banyak daerah di negara ini tidak memiliki koordinat GPS yang sangat baik untuk titik akses wifi (dan saya tidak tahu tentang menara sel)
emmby

9

Saya telah menulis tutorial terperinci yang mencakup lokasi saat ini di demonuts.com . Anda dapat menemukan lebih banyak deskripsi di sini dan juga Anda dapat mengunduh seluruh kode sumber demo untuk pemahaman yang lebih baik.

Sudah ada banyak jawaban di sana, tetapi saya ingin menunjukkan cara terbaru untuk mendapatkan lokasi menggunakan Google API, sehingga pemrogram baru dapat menggunakan metode baru:

Pertama-tama, letakkan ini di file gradle

compile 'com.google.android.gms:play-services:8.4.0'

kemudian mengimplementasikan antarmuka yang diperlukan

public class MainActivity  extends BaseActivitiy implements GoogleApiClient.ConnectionCallbacks, GoogleApiClient.OnConnectionFailedListener, com.google.android.gms.location.LocationListener

nyatakan contoh

  private GoogleApiClient mGoogleApiClient;
  private Location mLocation;
  private LocationManager locationManager;
  private LocationRequest mLocationRequest;

letakkan ini onCreate()

 mGoogleApiClient = new GoogleApiClient.Builder(this)
                .addConnectionCallbacks(this)
                .addOnConnectionFailedListener(this)
                .addApi(LocationServices.API)
                .build();
        locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);

Akhirnya, ganti metode yang diperlukan

 @Override
    public void onConnected(Bundle bundle) {
        if (ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
            // TODO: Consider calling
            //    ActivityCompat#requestPermissions
            // here to request the missing permissions, and then overriding
            //   public void onRequestPermissionsResult(int requestCode, String[] permissions,
            //                                          int[] grantResults)
            // to handle the case where the user grants the permission. See the documentation
            // for ActivityCompat#requestPermissions for more details.
            return;
        }
        mLocation = LocationServices.FusedLocationApi.getLastLocation(mGoogleApiClient);
        if(mLocation == null){
            startLocationUpdates();
        }
        if (mLocation != null) {
            double latitude = mLocation.getLatitude();
            double longitude = mLocation.getLongitude();
        } else {
            // Toast.makeText(this, "Location not Detected", Toast.LENGTH_SHORT).show();
        }
    }

    protected void startLocationUpdates() {
        // Create the location request
        mLocationRequest = LocationRequest.create()
                .setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY)
                .setInterval(UPDATE_INTERVAL)
                .setFastestInterval(FASTEST_INTERVAL);
        // Request location updates
        if (ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
            // TODO: Consider calling
            //    ActivityCompat#requestPermissions
            // here to request the missing permissions, and then overriding
            //   public void onRequestPermissionsResult(int requestCode, String[] permissions,
            //                                          int[] grantResults)
            // to handle the case where the user grants the permission. See the documentation
            // for ActivityCompat#requestPermissions for more details.
            return;
        }
        LocationServices.FusedLocationApi.requestLocationUpdates(mGoogleApiClient,
                mLocationRequest, this);
        Log.d("reque", "--->>>>");
    }

    @Override
    public void onConnectionSuspended(int i) {
        Log.i(TAG, "Connection Suspended");
        mGoogleApiClient.connect();
    }

    @Override
    public void onConnectionFailed(ConnectionResult connectionResult) {
        Log.i(TAG, "Connection failed. Error: " + connectionResult.getErrorCode());
    }

    @Override
    public void onStart() {
        super.onStart();
        mGoogleApiClient.connect();
    }

    @Override
    public void onStop() {
        super.onStop();
        if (mGoogleApiClient.isConnected()) {
            mGoogleApiClient.disconnect();
        }
    }
    @Override
    public void onLocationChanged(Location location) {

    }

Jangan lupa untuk memulai GPS di perangkat Anda sebelum menjalankan aplikasi.


Menggunakan API? Jadi ini adalah layanan hak terbatas.
user3304007

8

Sebenarnya kita bisa menggunakan dua provider (GPS & NETWORK). Dan mereka hanya berbagi pendengar publik:

locationManager.requestLocationUpdates(LocationManager.NETWORK_PROVIDER, 10 * 1000, (float) 10.0, listener);
locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 90 * 1000, (float) 10.0, listener);

Ini diperlukan karena OnLocationChanged()metode selalu perlu dipanggil dalam waktu.


5

Saya tidak yakin apakah Layanan Berbasis Lokasi dapat memperoleh lokasi dari infrastruktur lain selain GPS, tetapi menurut artikel itu, tampaknya memang mungkin:

Aplikasi dapat memanggil salah satu dari beberapa jenis metode penentuan posisi.

Menggunakan jaringan ponsel: ID sel saat ini dapat digunakan untuk mengidentifikasi Base Transceiver Station (BTS) yang berkomunikasi dengan perangkat dan lokasi BTS itu. Jelas, keakuratan metode ini tergantung pada ukuran sel, dan bisa sangat tidak akurat. Sel GSM mungkin berdiameter 2 hingga 20 kilometer. Teknik lain yang digunakan bersama dengan ID sel dapat mencapai akurasi dalam 150 meter.

Menggunakan satelit: Global Positioning System (GPS), yang dikendalikan oleh Departemen Pertahanan AS, menggunakan konstelasi 24 satelit yang mengorbit bumi. GPS menentukan posisi perangkat dengan menghitung perbedaan waktu sinyal dari satelit yang berbeda untuk mencapai penerima. Sinyal GPS dikodekan, sehingga perangkat seluler harus dilengkapi dengan penerima GPS. GPS berpotensi merupakan metode yang paling akurat (antara 4 dan 40 meter jika penerima GPS memiliki pandangan yang jelas ke langit), tetapi memiliki beberapa kelemahan: Perangkat keras tambahan bisa mahal, menghabiskan baterai saat sedang digunakan, dan membutuhkan beberapa kehangatan. setelah awal yang dingin untuk mendapatkan perbaikan awal pada satelit yang terlihat. Itu juga menderita "efek ngarai" di kota-kota, di mana visibilitas satelit terputus-putus.

Menggunakan beacon pemosisian jarak pendek: Di area yang relatif kecil, seperti bangunan tunggal, jaringan area lokal dapat menyediakan lokasi bersama dengan layanan lainnya. Misalnya, perangkat yang dilengkapi dengan tepat dapat menggunakan Bluetooth untuk penentuan posisi jarak pendek.


1
@ElijahSaounkine rupanya npinti belum pernah mendengar tentang Assisted GPS. Di masa depan, Anda mungkin bisa memberi tahu orang-orang tentang hal-hal yang telah mereka awasi, alih-alih bersikap agresif.
saltandpepper

@Sammy 5 tahun yang lalu saya tampaknya jauh lebih lincah daripada sekarang. "Masa depan" yang Anda maksud, sehubungan dengan catatan saya, mungkin sudah dimulai dan berakhir;)
Elijah Saounkine

5

Gunakan kode di bawah ini, itu akan memberikan penyedia terbaik yang tersedia:

String locCtx = Context.LOCATION_SERVICE; 

LocationManager locationMgr = (LocationManager) ctx.getSystemService(locCtx);

Criteria criteria  = new Criteria();
criteria.setAccuracy(Criteria.ACCURACY_FINE);
criteria.setAltitudeRequired(false);
criteria.setBearingRequired(false);
criteria.setCostAllowed(true);
criteria.setPowerRequirement(Criteria.POWER_LOW);

String provider = locationMgr.getBestProvider(criteria, true);

System.out.println("Best Available provider::::"+provider);

bagaimana menginisialisasi ctx, Konteks ctx = ini; ? jatuh

4

Cara yang disarankan untuk melakukan ini adalah menggunakan LocationClient :

Pertama, tentukan nilai interval pembaruan lokasi. Sesuaikan ini dengan kebutuhan Anda.

private static final int MILLISECONDS_PER_SECOND = 1000;
private static final long UPDATE_INTERVAL = MILLISECONDS_PER_SECOND * UPDATE_INTERVAL_IN_SECONDS;
private static final int FASTEST_INTERVAL_IN_SECONDS = 1;
private static final long FASTEST_INTERVAL = MILLISECONDS_PER_SECOND * FASTEST_INTERVAL_IN_SECONDS;

Memiliki Anda Activitymenerapkan GooglePlayServicesClient.ConnectionCallbacks, GooglePlayServicesClient.OnConnectionFailedListenerdan LocationListener.

public class LocationActivity extends Activity implements 
GooglePlayServicesClient.ConnectionCallbacks, GooglePlayServicesClient.OnConnectionFailedListener, LocationListener {}

Kemudian, atur metode a LocationClientdi onCreate()Anda Activity:

public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    mLocationClient = new LocationClient(this, this, this);

    mLocationRequest = LocationRequest.create();
    mLocationRequest.setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY);
    mLocationRequest.setInterval(UPDATE_INTERVAL);
    mLocationRequest.setFastestInterval(FASTEST_INTERVAL);
}

Tambahkan metode yang diperlukan untuk Anda Activity; onConnected()adalah metode yang disebut ketika LocationClientmenghubungkan. onLocationChanged()adalah tempat Anda akan mengambil lokasi yang paling baru.

@Override
public void onConnectionFailed(ConnectionResult connectionResult) {
    Log.w(TAG, "Location client connection failed");
}

@Override
public void onConnected(Bundle dataBundle) {
    Log.d(TAG, "Location client connected");
    mLocationClient.requestLocationUpdates(mLocationRequest, this); 
}

@Override
public void onDisconnected() {
    Log.d(TAG, "Location client disconnected");
}

@Override
public void onLocationChanged(Location location) {
    if (location != null) {
        Log.d(TAG, "Updated Location: " + Double.toString(location.getLatitude()) + "," + Double.toString(location.getLongitude()));
    } else {
        Log.d(TAG, "Updated location NULL");
    } 
}     

Pastikan untuk menghubungkan / memutuskan sambungan LocationClientsehingga hanya menggunakan baterai tambahan saat benar-benar diperlukan dan agar GPS tidak berjalan tanpa batas. Itu LocationClientharus terhubung untuk mendapatkan data dari itu.

public void onResume() {
    super.onResume();
    mLocationClient.connect();
}

public void onStop() {
    if (mLocationClient.isConnected()) {
        mLocationClient.removeLocationUpdates(this);
    }
    mLocationClient.disconnect();
    super.onStop();
}

Dapatkan lokasi pengguna. Pertama coba gunakan LocationClient; jika itu gagal, kembali ke LocationManager.

public Location getLocation() {
    if (mLocationClient != null && mLocationClient.isConnected()) {
        return mLocationClient.getLastLocation();
    } else {
        LocationManager locationManager = (LocationManager) this.getSystemService(Context.LOCATION_SERVICE);
        if (locationManager != null) {
            Location lastKnownLocationGPS = locationManager.getLastKnownLocation(LocationManager.GPS_PROVIDER);
            if (lastKnownLocationGPS != null) {
                return lastKnownLocationGPS;
            } else {
                return locationManager.getLastKnownLocation(LocationManager.NETWORK_PROVIDER);
            }
        } else {
            return null;
        }
    }
}

3

Meskipun jawabannya sudah diberikan di sini. Saya hanya ingin membagikan ini kepada dunia jika menemukan skenario seperti itu.

Persyaratan saya adalah bahwa saya perlu mendapatkan lokasi pengguna saat ini dalam waktu maksimal 30 hingga 35 detik, jadi di sini adalah solusi yang saya buat berikut Jawaban Nirav Ranpara .

1. Saya membuat kelas MyLocationManager.java yang menangani semua hal-hal GPS dan Jaringan

import java.util.concurrent.Executors;
import java.util.concurrent.ScheduledExecutorService;
import java.util.concurrent.TimeUnit;

import com.app.callbacks.OnLocationDetectectionListener;

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;
import android.widget.Toast;

public class MyLocationManager {
    /** The minimum distance to GPS change Updates in meters **/
    private final long MIN_DISTANCE_CHANGE_FOR_UPDATES_FOR_GPS = 2; // 2
                                                                    // meters
    /** The minimum time between GPS updates in milliseconds **/
    private final long MIN_TIME_BW_UPDATES_OF_GPS = 1000 * 5 * 1; // 5
                                                                    // seconds

    /** The minimum distance to NETWORK change Updates in meters **/
    private final long MIN_DISTANCE_CHANGE_FOR_UPDATES_FOR_NETWORK = 5; // 5
                                                                        // meters
    /** The minimum time between NETWORK updates in milliseconds **/
    private final long MIN_TIME_BW_UPDATES_OF_NETWORK = 1000 * 10 * 1; // 10
                                                                        // seconds

    /**
     * Lets just say i don't trust the first location that the is found. This is
     * to avoid that
     **/

    private int NetworkLocationCount = 0, GPSLocationCount = 0;
    private boolean isGPSEnabled;
    private boolean isNetworkEnabled;
    /**
     * Don't do anything if location is being updated by Network or by GPS
     */
    private boolean isLocationManagerBusy;
    private LocationManager locationManager;
    private Location currentLocation;
    private Context mContext;
    private OnLocationDetectectionListener mListener;

    public MyLocationManager(Context mContext,
            OnLocationDetectectionListener mListener) {
        this.mContext = mContext;
        this.mListener = mListener;
    }

    /**
     * Start the location manager to find my location
     */
    public void startLocating() {
        try {
            locationManager = (LocationManager) mContext
                    .getSystemService(Context.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
                showSettingsAlertDialog();
            } else {
                // If GPS enabled, get latitude/longitude using GPS Services
                if (isGPSEnabled) {
                    locationManager.requestLocationUpdates(
                            LocationManager.GPS_PROVIDER,
                            MIN_TIME_BW_UPDATES_OF_GPS,
                            MIN_DISTANCE_CHANGE_FOR_UPDATES_FOR_GPS,
                            gpsLocationListener);

                }
                if (isNetworkEnabled) {
                    locationManager.requestLocationUpdates(
                            LocationManager.NETWORK_PROVIDER,
                            MIN_TIME_BW_UPDATES_OF_NETWORK,
                            MIN_DISTANCE_CHANGE_FOR_UPDATES_FOR_NETWORK,
                            networkLocationListener);

                }
            }
            /**
             * My 30 seconds plan to get myself a location
             */
            ScheduledExecutorService se = Executors
                    .newSingleThreadScheduledExecutor();
            se.schedule(new Runnable() {

                @Override
                public void run() {
                    if (currentLocation == null) {
                        if (isGPSEnabled) {
                            currentLocation = locationManager
                                    .getLastKnownLocation(LocationManager.GPS_PROVIDER);
                        } else if (isNetworkEnabled) {
                            currentLocation = locationManager
                                    .getLastKnownLocation(LocationManager.NETWORK_PROVIDER);

                        }
                        if (currentLocation != null && mListener != null) {
                            locationManager.removeUpdates(gpsLocationListener);
                            locationManager
                                    .removeUpdates(networkLocationListener);
                            mListener.onLocationDetected(currentLocation);
                        }
                    }
                }
            }, 30, TimeUnit.SECONDS);

        } catch (Exception e) {
            Log.e("Error Fetching Location", e.getMessage());
            Toast.makeText(mContext,
                    "Error Fetching Location" + e.getMessage(),
                    Toast.LENGTH_SHORT).show();
        }
    }

    /**
     * Handle GPS location listener callbacks
     */
    private LocationListener gpsLocationListener = new LocationListener() {

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

        }

        @Override
        public void onProviderEnabled(String provider) {
            // TODO Auto-generated method stub

        }

        @Override
        public void onProviderDisabled(String provider) {
            // TODO Auto-generated method stub

        }

        @Override
        public void onLocationChanged(Location location) {

            if (GPSLocationCount != 0 && !isLocationManagerBusy) {
                Log.d("GPS Enabled", "GPS Enabled");
                isLocationManagerBusy = true;
                currentLocation = location;
                locationManager.removeUpdates(gpsLocationListener);
                locationManager.removeUpdates(networkLocationListener);
                isLocationManagerBusy = false;
                if (currentLocation != null && mListener != null) {
                    mListener.onLocationDetected(currentLocation);
                }
            }
            GPSLocationCount++;
        }
    };
    /**
     * Handle Network location listener callbacks
     */
    private LocationListener networkLocationListener = new LocationListener() {

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

        }

        @Override
        public void onProviderEnabled(String provider) {
            // TODO Auto-generated method stub

        }

        @Override
        public void onProviderDisabled(String provider) {
            // TODO Auto-generated method stub

        }

        @Override
        public void onLocationChanged(Location location) {
            if (NetworkLocationCount != 0 && !isLocationManagerBusy) {
                Log.d("Network", "Network");
                isLocationManagerBusy = true;
                currentLocation = location;
                locationManager.removeUpdates(gpsLocationListener);
                locationManager.removeUpdates(networkLocationListener);
                isLocationManagerBusy = false;
                if (currentLocation != null && mListener != null) {
                    mListener.onLocationDetected(currentLocation);
                }
            }
            NetworkLocationCount++;
        }
    };

    /**
     * Function to show settings alert dialog. On pressing the Settings button
     * it will launch Settings Options.
     * */
    public void showSettingsAlertDialog() {
        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 the Settings button.
        alertDialog.setPositiveButton("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 the cancel button
        alertDialog.setNegativeButton("Cancel",
                new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialog, int which) {
                        dialog.cancel();
                    }
                });

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

2. Saya membuat Interface (panggilan balik) OnLocationDetectectionListener.java untuk mengkomunikasikan hasil kembali ke fragmen panggilan atau aktivitas

import android.location.Location;

public interface OnLocationDetectectionListener {
    public void onLocationDetected(Location mLocation);
}

3. Kemudian saya membuat Kegiatan MainAppActivty.java yang mengimplementasikan OnLocationDetectectionListenerantarmuka dan inilah cara saya menerima lokasi saya di dalamnya

public class MainAppActivty extends Activity implements
        OnLocationDetectectionListener {

    private Location currentLocation;
    private MyLocationManager mLocationManager;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        setContentView(R.layout.activity_home);
        super.onCreate(savedInstanceState);
            mLocationManager = new MyLocationManager(this, this);
            mLocationManager.startLocating();
    }

    @Override
    public void onLocationDetected(Location mLocation) {
        //Your new Location is received here
        currentLocation = mLocation;
    }

4. Tambahkan izin berikut ke file manifes Anda

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

Semoga ini bisa membantu orang lain :)


3

Dari lebih dari satu tahun terakhir, saya menggunakan kombinasi GPS_PROVIDER dan NETWORK_PROVIDER untuk mendapatkan lokasi saat ini dan berfungsi dengan baik, tetapi dari beberapa bulan terakhir saya mendapatkan lokasi setelah penundaan yang lama, jadi saya beralih ke API terbaru FusedLocationProviderClient dan ini bekerja cukup baik.

Ini adalah kelas yang saya tulis untuk mendapatkan lokasi saat ini dengan menggunakan FusedLocationProviderClient. Dalam kode di bawah ini, saya menggunakan timer untuk menunggu sementara untuk mendapatkan lokasi saat ini, saya dijadwalkan timer 15 detik, Anda dapat mengubahnya sesuai dengan Anda.

private static FusedLocationService ourInstance;
private final LocationRequest locationRequest;
private FusedLocationProviderClient mFusedLocationClient;
private Location mLastLocation;
private Context context;
private FindOutLocation findOutLocation;
private boolean callbackTriggered = false;
private Timer timer;

public static FusedLocationService getInstance(Context pContext) {

    if (null == ourInstance) ourInstance = new FusedLocationService(pContext);

    return ourInstance;
}

private FusedLocationService(Context pContext) {
    context = pContext;
    mFusedLocationClient = LocationServices.getFusedLocationProviderClient(context);
    locationRequest = getLocationRequest();
    requestLocation(context);
}

public Location getLastKnownLocation() {
    return mLastLocation;
}

private void requestLocation(Context context) {

    if (ActivityCompat.checkSelfPermission(context, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(context, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
        return;
    }
    mFusedLocationClient.requestLocationUpdates(locationRequest, mLocationCallback, null);
    mFusedLocationClient.getLastLocation().addOnSuccessListener(location -> {
        if (location != null) {
            mLastLocation = location;
            triggerCallback(mLastLocation);
        }
    });
}

private LocationRequest getLocationRequest() {
    LocationRequest locationRequest = new LocationRequest();
    long INTERVAL = 10 * 1000;
    long FASTEST_INTERVAL = 5 * 1000;
    locationRequest.setInterval(INTERVAL);
    locationRequest.setFastestInterval(FASTEST_INTERVAL);
    locationRequest.setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY);
    return locationRequest;
}

private LocationCallback mLocationCallback = new LocationCallback() {
    @Override
    public void onLocationResult(LocationResult locationResult) {
        for (Location location : locationResult.getLocations()) {
            if (location != null) mLastLocation = location;
        }
        if (null != mLastLocation) triggerCallback(mLastLocation);
    }
};

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

@SuppressLint("MissingPermission")
public void findLocation(FindOutLocation findOutLocation) {
    long TIMER_TIME_OUT = 15 * 1000;
    this.findOutLocation = findOutLocation;
    callbackTriggered = false;

    try {
        requestLocation(context);
        timer = new Timer();
        timer.schedule(new GetLastLocation(context), TIMER_TIME_OUT);
    } catch (Exception e) {
        e.printStackTrace();
    }
}

private class GetLastLocation extends TimerTask {
    Context context;

    GetLastLocation(Context context) {
        this.context = context;
    }

    @Override
    public void run() {
        triggerCallback(mLastLocation);
    }
}

private void triggerCallback(Location location) {
    if (null != location) mLastLocation = location;
    if (!callbackTriggered && null != findOutLocation) {
        callbackTriggered = true;
        removeLocationUpdates();
        findOutLocation.gotLocation(location);
        findOutLocation = null;
    }
}

private void removeLocationUpdates() {
    if (null != timer) timer.cancel();
    if (null != mFusedLocationClient)
        mFusedLocationClient.removeLocationUpdates(mLocationCallback);
}
}

Dan menyebut ini dari aktivitas, inilah kodenya

    FusedLocationService.FindOutLocation findOutLocation = new FusedLocationService.FindOutLocation() {
        @Override
        public void gotLocation(Location currentLocation) {
            if (currentLocation != null) {
                /*TODO DO SOMETHING WITH CURRENT LOCATION*/
            }
        }
    };
    FusedLocationService.getInstance(this).findLocation(findOutLocation);

Tambahkan entri berikut di AndroidManifest.xml

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

<!-- Needed only if your app targets Android 5.0 (API level 21) or higher. -->
<uses-feature android:name="android.hardware.location.gps" />

2
public static Location getBestLocation(Context ctxt) {
    Location gpslocation = getLocationByProvider(
        LocationManager.GPS_PROVIDER, ctxt);
    Location networkLocation = getLocationByProvider(
        LocationManager.NETWORK_PROVIDER, ctxt);
    Location fetchedlocation = null;
    // if we have only one location available, the choice is easy
    if (gpslocation != null) {
        Log.i("New Location Receiver", "GPS Location available.");
        fetchedlocation = gpslocation;
    } else {
        Log.i("New Location Receiver",
            "No GPS Location available. Fetching Network location lat="
                + networkLocation.getLatitude() + " lon ="
                + networkLocation.getLongitude());
        fetchedlocation = networkLocation;
    }
    return fetchedlocation;
}

/**
 * get the last known location from a specific provider (network/gps)
 */
private static Location getLocationByProvider(String provider, Context ctxt) {
    Location location = null;
    // if (!isProviderSupported(provider)) {
    // return null;
    // }
    LocationManager locationManager = (LocationManager) ctxt
            .getSystemService(Context.LOCATION_SERVICE);
    try {
        if (locationManager.isProviderEnabled(provider)) {
            location = locationManager.getLastKnownLocation(provider);
        }
    } catch (IllegalArgumentException e) {
        Log.i("New Location Receiver", "Cannot access Provider " + provider);
    }
    return location;
}

2

Ini adalah kode yang menyediakan lokasi pengguna saat ini

buat Activty Maps:

public class Maps extends MapActivity {

    public static final String TAG = "MapActivity";
    private MapView mapView;
    private LocationManager locationManager;
    Geocoder geocoder;
    Location location;
    LocationListener locationListener;
    CountDownTimer locationtimer;
    MapController mapController;
    MapOverlay mapOverlay = new MapOverlay();

    @Override
    protected void onCreate(Bundle icicle) {
        super.onCreate(icicle);
        setContentView(R.layout.main);
        initComponents();
        mapView.setBuiltInZoomControls(true);
        mapView.setSatellite(true);
        mapView.setTraffic(true);
        mapView.setStreetView(true);
        mapController = mapView.getController();
        mapController.setZoom(16);
        locationManager = (LocationManager) getSystemService(LOCATION_SERVICE);
        if (locationManager == null) {
            Toast.makeText(Maps.this, "Location Manager Not Available",
                Toast.LENGTH_SHORT).show();
            return;
        }
        location = locationManager
                .getLastKnownLocation(LocationManager.GPS_PROVIDER);
        if (location == null)
            location = locationManager
                    .getLastKnownLocation(LocationManager.NETWORK_PROVIDER);
        if (location != null) {
            double lat = location.getLatitude();
            double lng = location.getLongitude();
            Toast.makeText(Maps.this, "Location Are" + lat + ":" + lng,
                Toast.LENGTH_SHORT).show();
            GeoPoint point = new GeoPoint((int) (lat * 1E6), (int) (lng * 1E6));
            mapController.animateTo(point, new Message());
            mapOverlay.setPointToDraw(point);
            List<Overlay> listOfOverlays = mapView.getOverlays();
            listOfOverlays.clear();
            listOfOverlays.add(mapOverlay);
        }
        locationListener = new LocationListener() {

            public void onStatusChanged(String arg0, int arg1, Bundle arg2) {}

            public void onProviderEnabled(String arg0) {}

            public void onProviderDisabled(String arg0) {}

            public void onLocationChanged(Location l) {
                location = l;
                locationManager.removeUpdates(this);
                if (l.getLatitude() == 0 || l.getLongitude() == 0) {
                } else {
                    double lat = l.getLatitude();
                    double lng = l.getLongitude();
                    Toast.makeText(Maps.this, "Location Are" + lat + ":" + lng,
                        Toast.LENGTH_SHORT).show();
                }
            }
        };
        if (locationManager.isProviderEnabled(LocationManager.GPS_PROVIDER))
            locationManager.requestLocationUpdates(
                LocationManager.GPS_PROVIDER, 1000, 10f, locationListener);
        locationManager.requestLocationUpdates(
            LocationManager.NETWORK_PROVIDER, 1000, 10f, locationListener);
        locationtimer = new CountDownTimer(30000, 5000) {

            @Override
            public void onTick(long millisUntilFinished) {
                if (location != null) locationtimer.cancel();
            }

            @Override
            public void onFinish() {
                if (location == null) {
                }
            }
        };
        locationtimer.start();
    }

    public MapView getMapView() {
        return this.mapView;
    }

    private void initComponents() {
        mapView = (MapView) findViewById(R.id.map_container);
        ImageView ivhome = (ImageView) this.findViewById(R.id.imageView_home);
        ivhome.setOnClickListener(new OnClickListener() {

            public void onClick(View arg0) {
                // TODO Auto-generated method stub
                Intent intent = new Intent(Maps.this, GridViewContainer.class);
                startActivity(intent);
                finish();
            }
        });
    }

    @Override
    protected boolean isRouteDisplayed() {
        return false;
    }

    class MapOverlay extends Overlay {

        private GeoPoint pointToDraw;

        public void setPointToDraw(GeoPoint point) {
            pointToDraw = point;
        }

        public GeoPoint getPointToDraw() {
            return pointToDraw;
        }

        @Override
        public boolean draw(Canvas canvas, MapView mapView, boolean shadow,
                long when) {
            super.draw(canvas, mapView, shadow);
            Point screenPts = new Point();
            mapView.getProjection().toPixels(pointToDraw, screenPts);
            Bitmap bmp = BitmapFactory.decodeResource(getResources(),
                R.drawable.select_map);
            canvas.drawBitmap(bmp, screenPts.x, screenPts.y - 24, null);
            return true;
        }
    }
}

main.xml:

    <?xml version="1.0" encoding="utf-8"?>
    <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:background="@android:color/black"
        android:orientation="vertical" >

        <com.google.android.maps.MapView
            android:id="@+id/map_container"
            android:layout_width="fill_parent"
            android:layout_height="fill_parent"
            android:apiKey="yor api key"
            android:clickable="true"
            android:focusable="true" />

    </LinearLayout>

dan jelaskan izin berikut dalam manifes:

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

2

Ini adalah cara saya meminta Izin Pengguna.

Di luar tag aplikasi Anda di AndroidManifest.xml tambahkan permintaan izin ini.

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

Kemudian tambahkan dependensi Lokasi Google di file App Gradle.

implementation 'com.google.android.gms:play-services-location:15.0.0'

Sekarang deklarasikan beberapa variabel Global.

private lateinit var mFusedLocationProvider:FusedLocationProviderClient
private lateinit var mLocationCallback: LocationCallback
private lateinit var mLocationRequest: LocationRequest
private var mLocationPermissionGranted:Boolean = false

Dalam metode OnCreate dari Aktivitas Anda (Saya tidak dapat Memformat Kode dengan Benar, Permintaan Maaf untuk itu)

mFusedLocationProvider = LocationServices.getFusedLocationProviderClient(this)

//Location Callback
mLocationCallback = object: LocationCallback(){
 override fun onLocationResult(p0: LocationResult?) {
  if(p0==null){
     //todo(request user to enable location from settings then remove return)
     return
  }else{
      getDeviceLocation()
       }
  }
}

//Location Request
mLocationRequest = LocationRequest.create()
mLocationRequest.priority = LocationRequest.PRIORITY_BALANCED_POWER_ACCURACY
//Set the Interval for Latest Interval Update
mLocationRequest.interval = 5000
//Set How Many Location Updated you Want
mLocationRequest.numUpdates = 1

getLocationPermission()
getDeviceLocation()

Sekarang buat kedua fungsinya.

 private fun getLocationPermission() {

            val permission:Array<String> = arrayOf(android.Manifest.permission.ACCESS_FINE_LOCATION,android.Manifest.permission.ACCESS_COARSE_LOCATION)
            if(ContextCompat.checkSelfPermission(applicationContext,Constant.FINE_LOCATION)== PermissionChecker.PERMISSION_GRANTED){
                if(ContextCompat.checkSelfPermission(applicationContext,Constant.COARSE_LOCATION)== PermissionChecker.PERMISSION_GRANTED){
                    mLocationPermissionGranted = true
                }
            }else{
                ActivityCompat.requestPermissions(this,permission,Constant.LOCATION_REQUEST_CODE)
            }

    }

Metode Kedua

private fun getDeviceLocation() {
        try{
            if(mLocationPermissionGranted){

                mFusedLocationProvider.lastLocation.addOnCompleteListener(this,{task: Task<Location> ->
                    if(task.isSuccessful){
                        var currentLocation: Location? = task.result
                        if(currentLocation!=null){

                            Log.i("Location","Latitude is ${currentLocation.latitude} and Longitude" +
                                    "${currentLocation.longitude}")
                        }

                        else
                            mFusedLocationProvider.requestLocationUpdates(mLocationRequest,mLocationCallback,null)
                    }
                })
            }
        }catch (e:SecurityException){
            Log.e("Error", "Security Exception ${e.message}")
        }
    }

Untuk Constant.kt

class Constant{
    companion object {

        //Location Request Settings
        const val SET_INTERVAL:Long = 2000
        const val NUM_UPDATES:Int = 1

        //Location Permission
        const val FINE_LOCATION:String = android.Manifest.permission.ACCESS_FINE_LOCATION
        const val COARSE_LOCATION:String = android.Manifest.permission.ACCESS_COARSE_LOCATION
    }
}

2

Perbaikan solusi @ Fedor. Daripada meminta lokasi dengan interval waktu '0' dan jarak '0', kita dapat menggunakan metode requestSingleUpdate dari manajer lokasi . Kode yang diperbarui (versi kotlin)

import android.annotation.SuppressLint
import android.content.Context
import android.location.Criteria
import android.location.Location
import android.location.LocationListener
import android.location.LocationManager
import android.os.Bundle
import java.util.*

@SuppressLint("MissingPermission")
class AppLocationProvider {

  private lateinit var timer: Timer
  private var locationManager: LocationManager? = null
  private lateinit var locationCallBack: LocationCallBack
  private var gpsEnabled = false
  private var networkEnabled = false

  private var locationListener: LocationListener = object : LocationListener {

    override fun onLocationChanged(location: Location) {
      timer.cancel()
      locationCallBack.locationResult(location)
    }

    override fun onProviderDisabled(provider: String) {}
    override fun onProviderEnabled(provider: String) {}
    override fun onStatusChanged(provider: String, status: Int, extras: Bundle) {}
  }

  fun getLocation(context : Context, callBack: LocationCallBack): Boolean {
    locationCallBack = callBack
    if (locationManager == null)
      locationManager = context.getSystemService(Context.LOCATION_SERVICE) as LocationManager?

    //exceptions will be thrown if provider is not permitted.
    try {
      gpsEnabled = locationManager!!.isProviderEnabled(LocationManager.GPS_PROVIDER)
    } catch (ex: Exception) {
      ex.printStackTrace()
    }

    try {
      networkEnabled = locationManager!!.isProviderEnabled(LocationManager.NETWORK_PROVIDER)
    } catch (ex: Exception) {
      ex.printStackTrace()
    }

    //don't start listeners if no provider is enabled
    if (!gpsEnabled && !networkEnabled)
      return false

    val criteria = Criteria()
    if (gpsEnabled) {
      criteria.accuracy = Criteria.ACCURACY_FINE
    } else {
      criteria.accuracy = Criteria.ACCURACY_COARSE
    }
    locationManager!!.requestSingleUpdate(criteria, locationListener, null)

    timer = Timer()
    timer.schedule(GetLastKnownLocation(), 5000)
    return true
  }

  inner class GetLastKnownLocation : TimerTask() {

    override fun run() {
      locationManager!!.removeUpdates(locationListener)

      var netLoc: Location? = null
      var gpsLoc: Location? = null

      if (gpsEnabled)
        gpsLoc = locationManager!!.getLastKnownLocation(LocationManager.GPS_PROVIDER)
      if (networkEnabled)
        netLoc = locationManager!!.getLastKnownLocation(LocationManager.NETWORK_PROVIDER)

      //check which value use the latest one
      if (gpsLoc != null && netLoc != null) {
        if (gpsLoc.time > netLoc.time)
          locationCallBack.locationResult(gpsLoc)
        else
          locationCallBack.locationResult(netLoc)
        return
      }

      if (gpsLoc != null) {
        locationCallBack.locationResult(gpsLoc)
        return
      }
      if (netLoc != null) {
        locationCallBack.locationResult(netLoc)
        return
      }
      locationCallBack.locationResult(null)
    }
  }

  interface LocationCallBack {
    fun locationResult(location: Location?)
  }
}

Untuk mendapatkan lokasi perlu memanggil metode getLocation sebagai -

AppLocationProvider().getLocation(context, object : AppLocationProvider.LocationCallBack {
  override fun locationResult(location: Location?) {
    // use location, this might get called in a different thread if a location is a last known location. In that case, you can post location on main thread
  }
})

Catatan: Sebelum memanggil metode getLocation, izin lokasi yang diperlukan harus diberikan.


1

Untuk mendapatkan dan menunjukkan lokasi pengguna saat ini, Anda juga dapat menggunakan MyLocationOverlay. Misalkan Anda memiliki mapViewbidang dalam aktivitas Anda. Yang perlu Anda lakukan untuk menunjukkan lokasi pengguna adalah sebagai berikut:

myLocationOverlay = new MyLocationOverlay(this, mapView);
myLocationOverlay.enableMyLocation();
mapView.getOverlays().add(myLocationOverlay);

Ini mendapatkan lokasi saat ini baik dari GPS atau jaringan. Jika keduanya gagal, enableMyLocation()akan kembalifalse .

Adapun lokasi hal-hal di sekitar area, sebuah ItemizedOverlay harus melakukan trik.

Saya harap saya tidak salah mengerti pertanyaan Anda. Semoga berhasil.


2
Terima kasih. Pertanyaannya adalah untuk aktivitas yang tidak memiliki tampilan peta dan tidak perlu menampilkan lokasi kepada pengguna.
emmby

1

EDIT: Diperbarui dengan API Layanan Lokasi terbaru dari pustaka Layanan Google Play (Juli 2014)

Saya akan merekomendasikan Anda untuk menggunakan API Layanan Lokasi baru , tersedia dari pustaka Layanan Google Play, yang menyediakan kerangka kerja tingkat tinggi yang lebih kuat yang mengotomatiskan tugas-tugas seperti pilihan penyedia lokasi dan manajemen daya. Menurut dokumentasi resmi: "... Location API memudahkan Anda untuk membangun aplikasi yang sadar lokasi, tanpa harus fokus pada detail teknologi lokasi yang mendasarinya. Mereka juga memungkinkan Anda meminimalkan konsumsi daya dengan menggunakan semua kemampuan perangkat keras perangkat. "

Untuk informasi lebih lanjut, kunjungi: Menjadikan Lokasi Aplikasi Anda Sadar

Untuk melihat contoh lengkap menggunakan API Layanan Lokasi terbaru, kunjungi: Kelas Android LocationClient sudah usang tetapi digunakan dalam dokumentasi


0

Cara sederhana dan terbaik untuk GeoLocation.

LocationManager lm = null;
boolean network_enabled;


if (lm == null)
                lm = (LocationManager) Kikit.this.getSystemService(Context.LOCATION_SERVICE);

            network_enabled = lm.isProviderEnabled(LocationManager.NETWORK_PROVIDER);

            dialog = ProgressDialog.show(Kikit.this, "", "Fetching location...", true);


            final Handler handler = new Handler();
            timer = new Timer();
            TimerTask doAsynchronousTask = new TimerTask() {

                @Override
                public void run() {
                    handler.post(new Runnable() {

                        @Override
                        public void run() 
                        {

                            Log.e("counter value","value "+counter);

                            if(counter<=8)
                            {
                                try 
                                {
                                    counter++;


                                    if (network_enabled) {

                                        lm = (LocationManager) Kikit.this.getSystemService(Context.LOCATION_SERVICE);

                                        Log.e("in network_enabled..","in network_enabled");

                                        // Define a listener that responds to location updates
                                        LocationListener locationListener = new LocationListener() 
                                        {


                                            public void onLocationChanged(Location location) 
                                            {
                                                if(attempt == false)

                                                {
                                                    attempt = true;
                                                    Log.e("in location listener..","in location listener..");
                                                    longi = location.getLongitude();
                                                    lati = location.getLatitude();
                                                    Data.longi = "" + longi; 
                                                    Data.lati = "" + lati;


                                                    Log.e("longitude : ",""+longi);
                                                    Log.e("latitude : ",""+lati);



                                                    if(faceboo_name.equals(""))
                                                    {
                                                        if(dialog!=null){
                                                        dialog.cancel();}
                                                        timer.cancel();
                                                        timer.purge();
                                                        Data.homepage_resume = true;
                                                        lm = null;
                                                        Intent intent = new Intent();                              
                                                        intent.setClass(Kikit.this,MainActivity.class);

                                                        startActivity(intent);      
                                                        finish();
                                                    }
                                                    else
                                                    {           

                                                        isInternetPresent = cd.isConnectingToInternet();

                                                        if (isInternetPresent) 
                                                        {
                                                            if(dialog!=null)
                                                                dialog.cancel();

                                                            Showdata();
                                                        }
                                                        else
                                                        {
                                                            error_view.setText(Data.internet_error_msg);
                                                            error_view.setVisibility(0);
                                                            error_gone();
                                                        }

                                                    }   
                                                }

                                            }

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

                                            public void onProviderEnabled(String provider) {
                                                //Toast.makeText(getApplicationContext(), "Location enabled", Toast.LENGTH_LONG).show();

                                            }

                                            public void onProviderDisabled(String provider) {


                                            }
                                        };



                                        // Register the listener with the Location Manager to receive
                                        // location updates
                                        lm.requestLocationUpdates(LocationManager.NETWORK_PROVIDER, 100000, 10,locationListener);

                                    } else{
                                        //Toast.makeText(getApplicationContext(), "No Internet Connection.", 2000).show();
                                        buildAlertMessageNoGps();

                                    }



                                } catch (Exception e) {
                                    // TODO
                                    // Auto-generated
                                    // catch
                                    // block
                                }
                            }
                            else
                            {

                                timer.purge();
                                timer.cancel();

                                if(attempt == false)
                                {
                                    attempt = true;

                                    String locationProvider = LocationManager.NETWORK_PROVIDER;
                                    // Or use LocationManager.GPS_PROVIDER

                                    try {
                                        Location lastKnownLocation = lm.getLastKnownLocation(locationProvider);

                                        longi = lastKnownLocation.getLongitude();
                                        lati = lastKnownLocation.getLatitude();
                                        Data.longi = "" + longi; 
                                        Data.lati = "" + lati;
                                    } catch (Exception e) {
                                        // TODO Auto-generated catch block
                                        e.printStackTrace();
                                        Log.i("exception in loc fetch", e.toString());
                                    }

                                    Log.e("longitude of last known location : ",""+longi);
                                    Log.e("latitude of last known location : ",""+lati);

                                    if(Data.fb_access_token == "")
                                    {

                                        if(dialog!=null){
                                            dialog.cancel();}
                                        timer.cancel();
                                        timer.purge();
                                        Data.homepage_resume = true;
                                        Intent intent = new Intent();                              
                                        intent.setClass(Kikit.this,MainActivity.class);

                                        startActivity(intent);  
                                        finish();
                                    }
                                    else
                                    {           

                                        isInternetPresent = cd.isConnectingToInternet();

                                        if (isInternetPresent) 
                                        {
                                            if(dialog!=null){
                                                dialog.cancel();}           
                                            Showdata();
                                        }
                                        else
                                        {
                                            error_view.setText(Data.internet_error_msg);
                                            error_view.setVisibility(0);
                                            error_gone();
                                        }

                                    }   

                                }
                            }
                        }
                    });
                }
            };
            timer.schedule(doAsynchronousTask, 0, 2000);


private void buildAlertMessageNoGps() {
        final AlertDialog.Builder builder = new AlertDialog.Builder(this);

        builder.setMessage("Your WiFi & mobile network location is disabled , do you want to enable it?")
        .setCancelable(false)
        .setPositiveButton("Yes", new DialogInterface.OnClickListener() {


            public void onClick(@SuppressWarnings("unused") final DialogInterface dialog, @SuppressWarnings("unused") final int id) 
            {
                startActivity(new Intent(android.provider.Settings.ACTION_LOCATION_SOURCE_SETTINGS));
                setting_page = true;
            }
        })
        .setNegativeButton("No", new DialogInterface.OnClickListener() {
            public void onClick(final DialogInterface dialog, @SuppressWarnings("unused") final int id) {
                dialog.cancel();
                finish();
            }
        });
        final AlertDialog alert = builder.create();
        alert.show();
    }

0

Agak terlambat di sini, tetapi yang akan saya lakukan dalam situasi seperti ini adalah menggunakan Google Maps API dan menandai lokasi terdekat menggunakan API lat dan long google maps. Ditambah pengalaman pengguna lebih baik jika Anda dapat menunjukkan lokasinya di peta. Tidak perlu repot dengan pembaruan lokasi pengguna atau frisking dengan api android. Biarkan google maps menangani internal untuk Anda.

@emmby mungkin telah menyelesaikannya di aplikasinya, tetapi untuk referensi di masa mendatang, lihat Google maps API untuk hal-hal khusus lokasi adalah apa yang saya rekomendasikan kepada sesama pengembang.

Sunting: Tautan untuk menampilkan lokasi pengguna di google maps


0

Dibutuhkan banyak hal untuk mendapatkan pembaruan lokasi di android, membutuhkan banyak kode bolierplate.

Anda harus berhati-hati

  • Layanan Google Play ketersediaan Periksa,
  • Perbarui Layanan Google play jika sudah lama atau tidak tersedia
  • Pembuatan Dialog GoogleApiClient dan panggilan baliknya terhubung, terputus, dll.
  • Menghentikan dan melepaskan sumber daya untuk pembaruan lokasi
  • Menangani skenario izin Lokasi
  • Memeriksa Layanan Lokasi Hidup atau Mati
  • Mendapatkan lokasi yang diketahui terakhir juga tidak mudah
  • Kembali ke lokasi yang terakhir diketahui jika tidak mendapatkan lokasi setelah durasi tertentu

Saya telah membuat Android-EasyLocation (perpustakaan android kecil) yang akan menangani semua hal ini dan Anda dapat fokus pada logika bisnis.

Yang Anda butuhkan adalah memperpanjang EasyLocationActivity dan ini

requestSingleLocationFix(easyLocationRequest);

atau

requestLocationUpdates(easyLocationRequest);

Periksa contoh aplikasi dan langkah-langkah yang diperlukan di sini di https://github.com/akhgupta/Android-EasyLocation


0

Inilah yang saya lakukan:

  1. Pertama-tama saya memeriksa apakah penyedia NETWORK atau GPS diaktifkan. Beberapa mungkin dinonaktifkan pada perangkat, beberapa mungkin dinonaktifkan dalam manifes aplikasi. Jika ada penyedia yang diaktifkan, saya mengambil lokasi terakhir yang di-cache untuk penyedia ini dan memulai pendengar pembaruan lokasi untuk penyedia ini.
  2. Ada metode untuk menentukan apakah lokasi lebih baik daripada lokasi yang terakhir diterima seperti yang disebutkan dalam tautan: - https://developer.android.com/guide/topics/location/strategies.html#BestEstimate
  3. Jika saya mendapat pembaruan dari pendengar lokasi, saya memeriksa apakah lokasi ini lebih baik daripada lokasi yang diterima sebelumnya. dan Jika lebih baik daripada mengganti lokasi ini ke lokasi terbaik sebelumnya (mFinalLocation ).
  4. Ada juga handler (timer) selama dua menit, yang pada akhirnya menghentikan layanan dan dalam onDestroy()metode layanan, berhenti mendengarkan pembaruan lokasi untuk masing-masing penyedia.

Di bawah ini adalah kode untuk layanan. Anda dapat menjalankannya berdasarkan frekuensi pembaruan lokasi yang Anda butuhkan.

import android.app.Service;
import android.content.Context;
import android.content.Intent;
import android.location.Location;
import android.location.LocationListener;
import android.location.LocationManager;
import android.os.Bundle;
import android.os.Handler;
import android.os.IBinder;
import android.os.Message;
import android.support.annotation.Nullable;
import android.util.Log;


public class RecordLocationService extends Service {

    private final String TAG = RecordLocationService.class.getSimpleName();

    private final int TWO_MINUTES = 1000 * 60 * 2;

    private LocationManager mLocationManager;

    private MyLocationListener mLocationListeners[] = new MyLocationListener[]{
            new MyLocationListener(LocationManager.NETWORK_PROVIDER),
            new MyLocationListener(LocationManager.GPS_PROVIDER)
    };

    private Location mFinalLocation;

    private class MyLocationListener implements LocationListener {
        private String mProvider;

        public MyLocationListener(String provider) {
            Log.d(TAG, "LocationListener : " + provider);
            mProvider = provider;
        }

        public String getProvider() {
            return mProvider;
        }

        @Override
        public void onLocationChanged(Location location) {
            Log.d(TAG, "onLocationChanged : " + location);

            if (isBetterLocation(location, mFinalLocation)) {
                Log.d(TAG, "Setting current Final Location to recent most Location for Provider : " + location.getProvider());
                Log.d(TAG, "Setting current Final Location to : " + location);
                mFinalLocation = location;
            } else {
                Log.d(TAG, "Keeping current Final Location to previous Final Location");
            }

        }

        @Override
        public void onStatusChanged(String provider, int status, Bundle extras) {
            Log.d(TAG, "onStatusChanged provider " + provider);
        }

        @Override
        public void onProviderEnabled(String provider) {
            Log.d(TAG, "onProviderEnabled provider " + provider);
        }

        @Override
        public void onProviderDisabled(String provider) {
            Log.d(TAG, "onProviderDisabled provider " + provider);
        }
    }

    private Handler mStopServiceHandler = new Handler() {

        @Override
        public void handleMessage(Message msg) {
            switch (msg.what) {
                case 1: {
                    stopSelf();
                }
                break;
            }
        }
    };

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

    @Override
    public int onStartCommand(Intent intent, int flags, int startId) {
        super.onStartCommand(intent, flags, startId);
        Log.d(TAG, "onStartCommand");
        return START_STICKY;
    }

    @Override
    public void onCreate() {
        super.onCreate();
        Log.d(TAG, "onCreate");
        requestLocation();
        mStopServiceHandler.sendEmptyMessageDelayed(1, TWO_MINUTES);
    }

    private void requestLocation() {
        // Acquire a reference to the system Location Manager
        if (mLocationManager == null) {
            mLocationManager = (LocationManager) this.getApplicationContext().getSystemService(Context.LOCATION_SERVICE);
        }

        try {
            if (mLocationManager.getAllProviders().contains(LocationManager.NETWORK_PROVIDER) && mLocationManager.isProviderEnabled(LocationManager.NETWORK_PROVIDER)) {
                Log.d(TAG, "Fetching Cached Location for Provider : " + LocationManager.NETWORK_PROVIDER);
                Location cachedNetworkLocation = mLocationManager.getLastKnownLocation(LocationManager.NETWORK_PROVIDER);

                if (cachedNetworkLocation != null) {
                    Log.d(TAG, "Setting Final Location to Cached Location for Provider : " + LocationManager.NETWORK_PROVIDER);
                    Log.d(TAG, "Setting Final Location to : " + cachedNetworkLocation);
                    mFinalLocation = cachedNetworkLocation;
                } else {
                    Log.d(TAG, "Cached Location for Provider : " + LocationManager.NETWORK_PROVIDER + " is NULL");
                }

                Log.d(TAG, "Requesting Location Update for Provider : " + LocationManager.NETWORK_PROVIDER);
                mLocationManager.requestLocationUpdates(LocationManager.NETWORK_PROVIDER, 0, 0, mLocationListeners[0]);
            }

        } catch (SecurityException se) {
            Log.e(TAG, se.getMessage(), se);
        } catch (IllegalArgumentException iae) {
            Log.e(TAG, iae.getMessage(), iae);
        }

        try {
            if (mLocationManager.getAllProviders().contains(LocationManager.GPS_PROVIDER) && mLocationManager.isProviderEnabled(LocationManager.GPS_PROVIDER)) {
                Log.d(TAG, "Fetching Cached Location for Provider : " + LocationManager.GPS_PROVIDER);
                Location cachedGPSLocation = mLocationManager.getLastKnownLocation(LocationManager.GPS_PROVIDER);

                if (cachedGPSLocation != null) {
                    if (isBetterLocation(cachedGPSLocation, mFinalLocation)) {
                        Log.d(TAG, "Setting Final Location to Cached Location for Provider : " + LocationManager.GPS_PROVIDER);
                        Log.d(TAG, "Setting Final Location to : " + cachedGPSLocation);
                        mFinalLocation = cachedGPSLocation;
                    }
                } else {
                    Log.d(TAG, "Cached Location for Provider : " + LocationManager.GPS_PROVIDER + " is NULL");
                }

                Log.d(TAG, "Requesting Location Update for Provider : " + LocationManager.GPS_PROVIDER);
                mLocationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0, 0, mLocationListeners[1]);
            }

        } catch (SecurityException se) {
            Log.e(TAG, se.getMessage(), se);
        } catch (IllegalArgumentException iae) {
            Log.e(TAG, iae.getMessage(), iae);
        }


    }

    /**
     * Determines whether one Location reading is better than the current Location fix
     *
     * @param location            The new Location that you want to evaluate
     * @param currentBestLocation The current Location fix, to which you want to compare the new one
     */
    protected boolean isBetterLocation(Location location, Location currentBestLocation) {
        if (currentBestLocation == null) {
            // A new location is always better than no location
            return true;
        }

        // Check whether the new location fix is newer or older
        long timeDelta = location.getTime() - currentBestLocation.getTime();
        boolean isSignificantlyNewer = timeDelta > TWO_MINUTES;
        boolean isSignificantlyOlder = timeDelta < -TWO_MINUTES;
        boolean isNewer = timeDelta > 0;

        // If it's been more than two minutes since the current location, use the new location
        // because the user has likely moved
        if (isSignificantlyNewer) {
            return true;
            // If the new location is more than two minutes older, it must be worse
        } else if (isSignificantlyOlder) {
            return false;
        }

        // Check whether the new location fix is more or less accurate
        int accuracyDelta = (int) (location.getAccuracy() - currentBestLocation.getAccuracy());
        boolean isLessAccurate = accuracyDelta > 0;
        boolean isMoreAccurate = accuracyDelta < 0;
        boolean isSignificantlyLessAccurate = accuracyDelta > 200;

        // Check if the old and new location are from the same provider
        boolean isFromSameProvider = isSameProvider(location.getProvider(),
                currentBestLocation.getProvider());

        // Determine location quality using a combination of timeliness and accuracy
        if (isMoreAccurate) {
            return true;
        } else if (isNewer && !isLessAccurate) {
            return true;
        } else if (isNewer && !isSignificantlyLessAccurate && isFromSameProvider) {
            return true;
        }
        return false;
    }

    /**
     * Checks whether two providers are the same
     */
    private boolean isSameProvider(String provider1, String provider2) {
        if (provider1 == null) {
            return provider2 == null;
        }
        return provider1.equals(provider2);
    }

    @Override
    public void onDestroy() {
        super.onDestroy();
        Log.d(TAG, "onDestroy");
        if (mLocationManager != null) {
            for (int i = 0; i < mLocationListeners.length; i++) {
                try {
                    Log.d(TAG, "Removing Location Update for Provider : " + mLocationListeners[i].getProvider());
                    mLocationManager.removeUpdates(mLocationListeners[i]);
                } catch (Exception ex) {
                    Log.e(TAG, "fail to remove location listeners, ignore", ex);
                }
            }
        }
    }
}

0

Versi Kotlin dari @Fedor Greate menjawab:

penggunaan kelas:

val locationResult = object : MyLocation.LocationResult() {

    override fun gotLocation(location: Location?) {

        val lat = location!!.latitude
        val lon = location.longitude

        Toast.makeText(context, "$lat --SLocRes-- $lon", Toast.LENGTH_SHORT).show()
    }

}

val myLocation = MyLocation()
myLocation.getLocation(inflater.context, locationResult)

MyLocation Kelas:

class MyLocation {
    internal lateinit var timer1: Timer
    internal var lm: LocationManager? = null
    internal lateinit var locationResult: LocationResult
    internal var gps_enabled = false
    internal var network_enabled = false

    internal var locationListenerGps: LocationListener = object : LocationListener {


        override fun onLocationChanged(location: Location) {
            timer1.cancel()
            locationResult.gotLocation(location)
            lm!!.removeUpdates(this)
            lm!!.removeUpdates(locationListenerNetwork)
        }

        override fun onProviderDisabled(provider: String) {}
        override fun onProviderEnabled(provider: String) {}
        override fun onStatusChanged(provider: String, status: Int, extras: Bundle) {}
    }

    internal var locationListenerNetwork: LocationListener = object : LocationListener {
        override fun onLocationChanged(location: Location) {
            timer1.cancel()
            locationResult.gotLocation(location)
            lm!!.removeUpdates(this)
            lm!!.removeUpdates(locationListenerGps)
        }

        override fun onProviderDisabled(provider: String) {}
        override fun onProviderEnabled(provider: String) {}
        override fun onStatusChanged(provider: String, status: Int, extras: Bundle) {}
    }

    fun getLocation(context: Context, result: LocationResult): Boolean {
        //I use LocationResult callback class to pass location value from MyLocation to user code.
        locationResult = result
        if (lm == null)
            lm = context.getSystemService(Context.LOCATION_SERVICE) as LocationManager?

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

        try {
            network_enabled = lm!!.isProviderEnabled(LocationManager.NETWORK_PROVIDER)
        } catch (ex: Exception) {
        }

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

        if (ActivityCompat.checkSelfPermission(context,
                Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED ||
            ActivityCompat.checkSelfPermission(context, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) run {

            ActivityCompat.requestPermissions(context as Activity,
                arrayOf(Manifest.permission.ACCESS_FINE_LOCATION, Manifest.permission.ACCESS_COARSE_LOCATION), 111)
        }


        if (gps_enabled)
            lm!!.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0, 0f, locationListenerGps)
        if (network_enabled)
            lm!!.requestLocationUpdates(LocationManager.NETWORK_PROVIDER, 0, 0f, locationListenerNetwork)
        timer1 = Timer()
        timer1.schedule(GetLastLocation(context), 20000)
        return true
    }

    internal inner class GetLastLocation(var context: Context) : TimerTask() {
        override fun run() {
            lm!!.removeUpdates(locationListenerGps)
            lm!!.removeUpdates(locationListenerNetwork)

            var net_loc: Location? = null
            var gps_loc: Location? = null

            if (ActivityCompat.checkSelfPermission(context,
                    Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED ||
                ActivityCompat.checkSelfPermission(context, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED
            ) run {

                ActivityCompat.requestPermissions(context as Activity,
                    arrayOf(Manifest.permission.ACCESS_FINE_LOCATION, Manifest.permission.ACCESS_COARSE_LOCATION),111)
            }


            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)
        }
    }

     abstract class LocationResult {
          abstract fun gotLocation(location: Location?)
    }
}

0

Di Kelas Aktivitas membuat metode yang disesuaikan:

private void getTheUserPermission() {
        ActivityCompat.requestPermissions(this, new String[]
                {Manifest.permission.ACCESS_FINE_LOCATION}, REQUEST_LOCATION);
        locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
        LocationGetter locationGetter = new LocationGetter(FreshMenuSearchActivity.this, REQUEST_LOCATION, locationManager);


        if (!locationManager.isProviderEnabled(LocationManager.GPS_PROVIDER)) {

            locationGetter.OnGPS();
        } else {

            locationGetter.getLocation();
        }
    }

Buat Nama Kelas UserDefined LocationGetter: -

public class LocationGetter {

        private int REQUEST_LOCATION;
        private FreshMenuSearchActivity mContext;
        private LocationManager locationManager;
        private Geocoder geocoder;

        public LocationGetter(FreshMenuSearchActivity mContext, int requestLocation, LocationManager locationManager) {
            this.mContext = mContext;
            this.locationManager = locationManager;
            this.REQUEST_LOCATION = requestLocation;
        }


        public void getLocation() {

            if (ActivityCompat.checkSelfPermission(mContext, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(mContext,

                    Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
                ActivityCompat.requestPermissions(mContext, new String[]
                        {Manifest.permission.ACCESS_FINE_LOCATION}, REQUEST_LOCATION);
            } else {
                Location LocationGps = locationManager.getLastKnownLocation(LocationManager.GPS_PROVIDER);
                Location LocationNetwork = locationManager.getLastKnownLocation(LocationManager.NETWORK_PROVIDER);
                Location LocationPassive = locationManager.getLastKnownLocation(LocationManager.PASSIVE_PROVIDER);

                if (LocationGps != null) {
                    double lat = LocationGps.getLatitude();
                    double longi = LocationGps.getLongitude();
                    getTheAddress(lat, longi);
                } else if (LocationNetwork != null) {
                    double lat = LocationNetwork.getLatitude();
                    double longi = LocationNetwork.getLongitude();
                    getTheAddress(lat, longi);
                } else if (LocationPassive != null) {
                    double lat = LocationPassive.getLatitude();
                    double longi = LocationPassive.getLongitude();
                    getTheAddress(lat, longi);
                } else {
                    Toast.makeText(mContext, "Can't Get Your Location", Toast.LENGTH_SHORT).show();
                }

            }

        }

        private void getTheAddress(double latitude, double longitude) {
            List<Address> addresses;
            geocoder = new Geocoder(mContext, Locale.getDefault());

            try {
                addresses = geocoder.getFromLocation(latitude, longitude, 1);
                String address = addresses.get(0).getAddressLine(0);
                String city = addresses.get(0).getLocality();
                String state = addresses.get(0).getAdminArea();
                String country = addresses.get(0).getCountryName();
                String postalCode = addresses.get(0).getPostalCode();
                String knownName = addresses.get(0).getFeatureName();
                Log.d("neel", address);
            } catch (IOException e) {
                e.printStackTrace();
            }


        }

        public void OnGPS() {

            final AlertDialog.Builder builder = new AlertDialog.Builder(mContext);

            builder.setMessage("Enable GPS").setCancelable(false).setPositiveButton("YES", new DialogInterface.OnClickListener() {
                @Override
                public void onClick(DialogInterface dialog, int which) {
                    mContext.startActivity(new Intent(Settings.ACTION_LOCATION_SOURCE_SETTINGS));
                }
            }).setNegativeButton("NO", new DialogInterface.OnClickListener() {
                @Override
                public void onClick(DialogInterface dialog, int which) {

                    dialog.cancel();
                }
            });
            final AlertDialog alertDialog = builder.create();
            alertDialog.show();
        }

    }

Bagaimana cara mengaktifkan GPS hanya dengan mengklik "YA" alih-alih mengarahkan pengguna ke konfigurasi?
Aliton Oliveira

ketika Anda mengklik tombol yes: mContext.startActivity (Intent baru (Settings.ACTION_LOCATION_SOURCE_SETTINGS)); niat eksplisit akan diaktifkan untuk mengaktifkan GPS. @AlitonOliveira
neelkanth_vyas


-1

Baru-baru ini refactored untuk mendapatkan lokasi kode, mempelajari beberapa ide bagus, dan akhirnya mencapai perpustakaan dan Demo yang relatif sempurna.

//request all valid provider(network/gps)
private boolean requestAllProviderUpdates() {
    checkRuntimeEnvironment();
    checkPermission();

    if (isRequesting) {
        EasyLog.d("Request location update is busy");
        return false;
    }


    long minTime = getCheckTimeInterval();
    float minDistance = getCheckMinDistance();

    if (mMapLocationListeners == null) {
        mMapLocationListeners = new HashMap<>();
    }

    mValidProviders = getValidProviders();
    if (mValidProviders == null || mValidProviders.isEmpty()) {
        throw new IllegalArgumentException("Not available provider.");
    }

    for (String provider : mValidProviders) {
        LocationListener locationListener = new LocationListener() {
            @Override
            public void onLocationChanged(Location location) {
                if (location == null) {
                    EasyLog.e("LocationListener callback location is null.");
                    return;
                }
                printf(location);
                mLastProviderTimestamp = location.getTime();

                if (location.getProvider().equals(LocationManager.GPS_PROVIDER)) {
                    finishResult(location);
                } else {
                    doLocationResult(location);
                }

                removeProvider(location.getProvider());
                if (isEmptyValidProviders()) {
                    requestTimeoutMsgInit();
                    removeUpdates();
                }
            }

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

            @Override
            public void onProviderEnabled(String provider) {
            }

            @Override
            public void onProviderDisabled(String provider) {
            }
        };
        getLocationManager().requestLocationUpdates(provider, minTime, minDistance, locationListener);
        mMapLocationListeners.put(provider, locationListener);
        EasyLog.d("Location request %s provider update.", provider);
    }
    isRequesting = true;
    return true;
}

//remove request update
public void removeUpdates() {
    checkRuntimeEnvironment();

    LocationManager locationManager = getLocationManager();
    if (mMapLocationListeners != null) {
        Set<String> keys = mMapLocationListeners.keySet();
        for (String key : keys) {
            LocationListener locationListener = mMapLocationListeners.get(key);
            if (locationListener != null) {
                locationManager.removeUpdates(locationListener);
                EasyLog.d("Remove location update, provider is " + key);
            }
        }
        mMapLocationListeners.clear();
        isRequesting = false;
    }
}

//Compared with the last successful position, to determine whether you need to filter
private boolean isNeedFilter(Location location) {
    checkLocation(location);

    if (mLastLocation != null) {
        float distance = location.distanceTo(mLastLocation);
        if (distance < getCheckMinDistance()) {
            return true;
        }
        if (location.getAccuracy() >= mLastLocation.getAccuracy()
                && distance < location.getAccuracy()) {
            return true;
        }
        if (location.getTime() <= mLastProviderTimestamp) {
            return true;
        }
    }
    return false;
}

private void doLocationResult(Location location) {
    checkLocation(location);

    if (isNeedFilter(location)) {
        EasyLog.d("location need to filtered out, timestamp is " + location.getTime());
        finishResult(mLastLocation);
    } else {
        finishResult(location);
    }
}

//Return to the finished position
private void finishResult(Location location) {
    checkLocation(location);

    double latitude = location.getLatitude();
    double longitude = location.getLongitude();
    float accuracy = location.getAccuracy();
    long time = location.getTime();
    String provider = location.getProvider();

    if (mLocationResultListeners != null && !mLocationResultListeners.isEmpty()) {
        String format = "Location result:<%f, %f> Accuracy:%f Time:%d Provider:%s";
        EasyLog.i(String.format(format, latitude, longitude, accuracy, time, provider));

        mLastLocation = location;
        synchronized (this) {
            Iterator<LocationResultListener> iterator =  mLocationResultListeners.iterator();
            while (iterator.hasNext()) {
                LocationResultListener listener = iterator.next();
                if (listener != null) {
                    listener.onResult(location);
                }
                iterator.remove();
            }
        }
    }
}

Kode lengkap: https://github.com/bingerz/FastLocation/blob/master/fastlocationlib/src/main/java/cn/bingerz/fastlocation/FastLocation.java

* Setiap permintaan untuk menyelesaikan lokasi, yang terbaik adalah menghapus Pembaruan, jika tidak bilah status telepon akan selalu menampilkan ikon posisi.


-1

Setelah melihat semua jawaban, dan pertanyaan ( Sederhana dan Kuat ). Saya diklik hanya tentang perpustakaan Android-ReactiveLocation .

Ketika saya membuat aplikasi pelacakan lokasi. Kemudian saya menyadari bahwa itu sangat khas untuk menangani pelacakan lokasi dengan dioptimalkan dengan baterai.

Jadi saya ingin memberi tahu freshers dan juga pengembang yang tidak ingin mempertahankan kode lokasi mereka dengan optimisasi di masa depan. Gunakan perpustakaan ini.

ReactiveLocationProvider locationProvider = new 

    ReactiveLocationProvider(context);
    locationProvider.getLastKnownLocation()
        .subscribe(new Consumer<Location>() {
            @Override
            public void call(Location location) {
                doSthImportantWithObtainedLocation(location);
            }
        });

Ketergantungan untuk dimasukkan ke dalam build.gradle tingkat aplikasi

dependencies {
    ...
    compile 'pl.charmas.android:android-reactive-location2:2.1@aar'
    compile 'com.google.android.gms:play-services-location:11.0.4' //you can use newer GMS version if you need
    compile 'com.google.android.gms:play-services-places:11.0.4'
    compile 'io.reactivex:rxjava:2.0.5' //you can override RxJava version if you need
}

Pro untuk menggunakan lib ini:

  • Lib ini sedang dan akan dipelihara secara aktif.
  • Anda tidak perlu khawatir tentang pengoptimalan baterai. Sebagai pengembang telah melakukan yang terbaik.
  • Instalasi mudah, menempatkan ketergantungan dan bermain.
  • dengan mudah terhubung ke Play Services API
  • dapatkan lokasi terakhir yang diketahui
  • berlangganan untuk menggunakan pembaruan lokasi
  • API pengaturan lokasi
  • mengelola geofences
  • lokasi geocode ke daftar alamat
  • pengenalan aktivitas
  • gunakan API tempat saat ini ambil tempat
  • saran pelengkapan otomatis
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