Как я могу получить последнее известное местоположение при первом запуске службы?

Question

Дело в том, что я пытаюсь создать эмулятор, и он работает, но только один раз я нажимаю «отправить местоположение на устройство» на эмуляторе, но до этого у меня нет возможности получить местоположение .... Как получить местоположение в первый раз с помощью этой службы ?. У меня нет прав на правильное устройство, и эмулятор - это единственный способ проверить это на данный момент ..... Я попытался сначала отправить 0,0, чтобы узнать, вызвало бы это обновление местоположения, но оно не работает а также любые идеи?

@SuppressWarnings("MissingPermission") 
public class GPSService extends Service { 

    private LocationListener listener; 
    private LocationManager locationManager; 
    private String lastKnownLatitude; 
    private String lastKnownLongitude; 
    private Boolean isFirstTime=true; 

    @Nullable 
    @Override 
    public IBinder onBind(Intent intent) { 

     return null; 
    } 

    @Override 
    public void onCreate() { 
     super.onCreate(); 



     broadcastLocation("0","0"); 


     listener= new LocationListener() { 
      @Override 
      public void onLocationChanged(Location location) { 

       //To transfer the data to the main activity I use broadcast receiver in the main activity, using an intent filter location_update 
       Intent intentSendLocationMainActivity = new Intent("location_update"); 
       lastKnownLatitude=""+location.getLatitude(); 
       lastKnownLongitude=""+location.getLongitude(); 
       Log.d("LOCATION-UPDATE",lastKnownLatitude+" long:"+lastKnownLongitude); 
       broadcastLocation(lastKnownLatitude,lastKnownLongitude); 
      } 

      @Override 
      public void onStatusChanged(String s, int i, Bundle bundle) { 
       Log.d("GPS-Stat-Changed",s); 
      } 

      @Override 
      public void onProviderEnabled(String s) { 
       Log.d("GPS-Provider-Enabled",s); 
      } 

      @Override 
      public void onProviderDisabled(String s) { 
       Intent activateGPSIntent = new Intent(Settings.ACTION_LOCATION_SOURCE_SETTINGS); 
       activateGPSIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK); 
       startActivity(activateGPSIntent); 

      } 
     }; 

     locationManager = (LocationManager) getApplicationContext().getSystemService(Context.LOCATION_SERVICE); 
     //noinspection MissingPermission, listen for updates every 3 seconds 
     locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER,5000,0,listener); 
    } 

    @Override 
    public int onStartCommand(Intent intent, int flags, int startId) { 
     Log.d("ClearFromRecentService", "Service Started"); 
     Log.d("LAST_LAT_AND_LONG",lastKnownLatitude+" "+lastKnownLongitude); 

     return START_STICKY; 
    } 

    @Override 
    public void onDestroy() { 
     super.onDestroy(); 
     Log.d("ClearFromRecentService", "Service Destroyed, Removing update location listener"); 
     //unregistering the listener 
     /*if(locationManager != null){ 
      locationManager.removeUpdates(listener); 
     }*/ 

    } 

    public void onTaskRemoved(Intent rootIntent) { 
     Log.e("ClearFromRecentService", "END"); 
     //here you can call a background network request to post you location to server when app is killed 
     Toast.makeText(getApplicationContext(), "I'm still getting user coordinates", Toast.LENGTH_LONG).show(); 
     //stopSelf(); //call this method to stop the service 
    } 

    public void broadcastLocation(String latitude,String longitude){ 
     Intent intentSendLocationMainActivity = new Intent("location_update"); 
     intentSendLocationMainActivity.putExtra("latitude",latitude); 
     intentSendLocationMainActivity.putExtra("longitude",longitude); 
     //I need to differentiate here if the app is killed or not to send the location to main activity or to a server 
     sendBroadcast(intentSendLocationMainActivity); 
    } 
} 

EDIT: Это полный сервис, работающий. Впервые он получает координаты с getLastKnownLocation() и на sucesive раз с слушателя onLocationChanged()

@SuppressWarnings("MissingPermission") 
public class GPSService extends Service { 

    private LocationListener listener; 
    private LocationManager locationManager; 
    private String lastKnownLatitude; 
    private String lastKnownLongitude; 
    private Boolean isFirstTime=true; 

    @Nullable 
    @Override 
    public IBinder onBind(Intent intent) { 

     return null; 
    } 

    @Override 
    public void onCreate() { 
     super.onCreate(); 

     listener= new LocationListener() { 
      @Override 
      public void onLocationChanged(Location location) { 

       //To transfer the data to the main activity I use broadcast receiver in the main activity, using an intent filter location_update 
       Intent intentSendLocationMainActivity = new Intent("location_update"); 
       lastKnownLatitude=""+location.getLatitude(); 
       lastKnownLongitude=""+location.getLongitude(); 
       Log.d("LOCATION-UPDATE",lastKnownLatitude+" long:"+lastKnownLongitude); 
       broadcastLocation(lastKnownLatitude,lastKnownLongitude); 
      } 

      @Override 
      public void onStatusChanged(String s, int i, Bundle bundle) { 
       Log.d("GPS-Stat-Changed",s); 
      } 

      @Override 
      public void onProviderEnabled(String s) { 
       Log.d("GPS-Provider-Enabled",s); 
      } 

      @Override 
      public void onProviderDisabled(String s) { 
       Intent activateGPSIntent = new Intent(Settings.ACTION_LOCATION_SOURCE_SETTINGS); 
       activateGPSIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK); 
       startActivity(activateGPSIntent); 

      } 
     }; 

     locationManager = (LocationManager) getApplicationContext().getSystemService(Context.LOCATION_SERVICE); 
     //noinspection MissingPermission, listen for updates every 3 seconds 
     locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER,5000,0,listener); 


     Map<String, String> coordinates=getLastKnownLocation(locationManager); 
     broadcastLocation(coordinates.get("latitude"),coordinates.get("longitude")); 
    } 

    @Override 
    public int onStartCommand(Intent intent, int flags, int startId) { 
     Log.d("ClearFromRecentService", "Service Started"); 
     Log.d("LAST_LAT_AND_LONG",lastKnownLatitude+" "+lastKnownLongitude); 

     return START_STICKY; 
    } 

    @Override 
    public void onDestroy() { 
     super.onDestroy(); 
     Log.d("ClearFromRecentService", "Service Destroyed, Removing update location listener"); 
     //unregistering the listener 
     /*if(locationManager != null){ 
      locationManager.removeUpdates(listener); 
     }*/ 

    } 

    public void onTaskRemoved(Intent rootIntent) { 
     Log.e("ClearFromRecentService", "END"); 
     //here you can call a background network request to post you location to server when app is killed 
     Toast.makeText(getApplicationContext(), "I'm still getting user coordinates", Toast.LENGTH_LONG).show(); 
     //stopSelf(); //call this method to stop the service 
    } 

    private void broadcastLocation(String latitude,String longitude){ 
     Intent intentSendLocationMainActivity = new Intent("location_update"); 
     intentSendLocationMainActivity.putExtra("latitude",latitude); 
     intentSendLocationMainActivity.putExtra("longitude",longitude); 
     //I need to differentiate here if the app is killed or not to send the location to main activity or to a server 
     sendBroadcast(intentSendLocationMainActivity); 
    } 

    private Map<String, String> getLastKnownLocation(LocationManager lm){ 

     Location lastKnownLocation=lm.getLastKnownLocation(LocationManager.GPS_PROVIDER); 
     String ll=""+lastKnownLocation.getLatitude(); 
     Map<String, String> coordinates = new HashMap<String, String>(); 


     // Check everytime this value, it may be null 
     if(lastKnownLocation != null){ 
      coordinates.put("latitude",""+lastKnownLocation.getLatitude()); 
      coordinates.put("longitude",""+lastKnownLocation.getLongitude()); 

     }else{ 
      coordinates.put("latitude","0"); 
      coordinates.put("longitude","0"); 
     } 

     return coordinates; 
    } 
} 

Answer 1

@Override 
public void onCreate() { 
    super.onCreate(); 

    locationManager = (LocationManager) getApplicationContext() 
     .getSystemService(Context.LOCATION_SERVICE); 

    Location lastKnownLocation = locationManager 
     .getLastKnownLocation(Locat‌​ionManager.GPS_PROVI‌​DER); 

    // Check everytime this value, it may be null 
    if(lastKnownLocation != null){ 
     double latitude = lastKnownLocation.getLatitude(); 
     double longitude = lastKnownLocation.getLongitude(); 
     // Use values as you wish 
    } 

    broadcastLocation("0","0"); 


    .... 
}