Долгота и широта GPSTracker Android всегда возвращается 0,0

Question

Я использую GPS Tracker для получения долготы и широты от http://www.androidhive.info/2012/07/android-gps-location-manager-tutorial/.

Чтобы получить долготу и широту значения, я использую этот код:

gps = new GPSTracker(context); 

    latitude_user= gps.getLatitude(); 
    longitude_user = gps.getLongitude(); 

Некоторые устройства всегда возвращают значение 0,0, для некоторых устройств работает хорошо ... так, как это исправить?

это GPS Tracker.class

package com.tracking.bus.maps; 

import android.app.AlertDialog; 
import android.app.Service; 
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.os.IBinder; 
import android.provider.Settings; 
import android.util.Log; 

public class GPSTracker extends Service implements LocationListener { 

    private final Context mContext; 

    // flag for GPS status 
    boolean isGPSEnabled = false; 

    // flag for network status 
    boolean isNetworkEnabled = false; 

    // flag for GPS status 
    boolean canGetLocation = false; 

    Location location; // location 
    double latitude; // latitude 
    double longitude; // longitude 

    // The minimum distance to change Updates in meters 
    private static final long MIN_DISTANCE_CHANGE_FOR_UPDATES = 10; // 10 meters 

    // The minimum time between updates in milliseconds 
    private static final long MIN_TIME_BW_UPDATES = 1000 * 60 * 1; // 1 minute 

    // Declaring a Location Manager 
    protected LocationManager locationManager; 

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

    public Location getLocation() { 
     try { 
      locationManager = (LocationManager) mContext 
        .getSystemService(LOCATION_SERVICE); 

      // getting GPS status 
      isGPSEnabled = locationManager 
        .isProviderEnabled(LocationManager.GPS_PROVIDER); 

      // getting network status 
      isNetworkEnabled = locationManager 
        .isProviderEnabled(LocationManager.NETWORK_PROVIDER); 

      if (!isGPSEnabled && !isNetworkEnabled) { 
       // no network provider is enabled 
      } else { 
       this.canGetLocation = true; 
       if (isNetworkEnabled) { 
        locationManager.requestLocationUpdates(
          LocationManager.NETWORK_PROVIDER, 
          MIN_TIME_BW_UPDATES, 
          MIN_DISTANCE_CHANGE_FOR_UPDATES, this); 
        Log.d("Network", "Network"); 
        if (locationManager != null) { 
         location = locationManager 
           .getLastKnownLocation(LocationManager.NETWORK_PROVIDER); 
         if (location != null) { 
          latitude = location.getLatitude(); 
          longitude = location.getLongitude(); 
         } 
        } 
       } 
       // if GPS Enabled get lat/long using GPS Services 
       if (isGPSEnabled) { 
        if (location == null) { 
         locationManager.requestLocationUpdates(
           LocationManager.GPS_PROVIDER, 
           MIN_TIME_BW_UPDATES, 
           MIN_DISTANCE_CHANGE_FOR_UPDATES, this); 
         Log.d("GPS Enabled", "GPS Enabled"); 
         if (locationManager != null) { 
          location = locationManager 
            .getLastKnownLocation(LocationManager.GPS_PROVIDER); 
          if (location != null) { 
           latitude = location.getLatitude(); 
           longitude = location.getLongitude(); 
          } 
         } 
        } 
       } 
      } 

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

     return location; 
    } 

    /** 
    * Stop using GPS listener 
    * Calling this function will stop using GPS in your app 
    * */ 
    public void stopUsingGPS(){ 
     if(locationManager != null){ 
      locationManager.removeUpdates(GPSTracker.this); 
     }  
    } 

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

     // return latitude 
     return latitude; 
    } 

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

     // return longitude 
     return longitude; 
    } 

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

    /** 
    * Function to show settings alert dialog 
    * On pressing Settings button will lauch Settings Options 
    * */ 
    public void showSettingsAlert(){ 
     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 Settings button 
     alertDialog.setPositiveButton("Settings", new DialogInterface.OnClickListener() { 
      public void onClick(DialogInterface dialog,int which) { 
       Intent intent = new Intent(Settings.ACTION_LOCATION_SOURCE_SETTINGS); 
       mContext.startActivity(intent); 
      } 
     }); 

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

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

    @Override 
    public void onLocationChanged(Location location) { 
     getLatitude(); 
     getLongitude(); 
    } 

    @Override 
    public void onProviderDisabled(String provider) { 
    } 

    @Override 
    public void onProviderEnabled(String provider) { 
    } 

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

    @Override 
    public IBinder onBind(Intent arg0) { 
     return null; 
    } 

} 

и я уже клали ниже разрешения

<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"/> 

Answer 1

Вы не обновляя получил местоположение в onLocationChanged(), попробуйте следующее:

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

Answer 2

использование музыкальные услуги

compile 'com.google.android.gms:play-services:11.0.4' 

обновленный способ получения Lat долго андроида

public class MainActivity extends AppCompatActivity implements 
     GoogleApiClient.ConnectionCallbacks, 
     GoogleApiClient.OnConnectionFailedListener, 
     LocationListener, 
     ResultCallback<LocationSettingsResult> { 

    private static final String TAG = MainActivity.class.getSimpleName(); 
    private Context context; 
    private MarshMallowPermission permission; 
    protected static final int REQUEST_CHECK_SETTINGS = 0x1; 
    public static final long UPDATE_INTERVAL_IN_MILLISECONDS = 60000; 
    public static final long FASTEST_UPDATE_INTERVAL_IN_MILLISECONDS = 
      UPDATE_INTERVAL_IN_MILLISECONDS/2; 

    private GoogleApiClient mGoogleApiClient; 
    private LocationRequest mLocationRequest; 
    private LocationSettingsRequest mLocationSettingsRequest; 
    protected Boolean mRequestingLocationUpdates; 
    protected Location mCurrentLocation; 

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

     context = this; 

     mRequestingLocationUpdates = false; 
     permission = new MarshMallowPermission(context); 
     buildGoogleApiClient(); 
     createLocationRequest(); 
     buildLocationSettingsRequest(); 

     try { 
      if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) { 
       if (permission.checkPermissionForLocation()) { 
        Log.d(TAG, "Permissions Grant"); 
        checkLocationSettings(); 
       } else { 
        permission.requestPermissionForLocation(); 
       } 
      } else { 
       checkLocationSettings(); 
      } 

     } catch (Exception e) { 

     } 

    } 



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

    @Override 
    public void onResume() { 
     super.onResume(); 
     if (mGoogleApiClient.isConnected() && mRequestingLocationUpdates) { 
      startLocationUpdates(); 
     } 
    } 

    @Override 
    protected void onPause() { 
     super.onPause(); 
     if (mGoogleApiClient.isConnected()) { 
      stopLocationUpdates(); 
     } 
    } 

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

    protected synchronized void buildGoogleApiClient() { 
     Log.i(TAG, "Building GoogleApiClient"); 
     mGoogleApiClient = new GoogleApiClient.Builder(this) 
       .addConnectionCallbacks(this) 
       .addOnConnectionFailedListener(this) 
       .addApi(LocationServices.API) 
       .build(); 
    } 

    protected void createLocationRequest() { 
     mLocationRequest = new LocationRequest(); 
     mLocationRequest.setInterval(UPDATE_INTERVAL_IN_MILLISECONDS); 
     mLocationRequest.setFastestInterval(FASTEST_UPDATE_INTERVAL_IN_MILLISECONDS); 
     mLocationRequest.setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY); 
    } 

    protected void buildLocationSettingsRequest() { 
     LocationSettingsRequest.Builder builder = new LocationSettingsRequest.Builder(); 
     builder.addLocationRequest(mLocationRequest); 
     mLocationSettingsRequest = builder.build(); 
    } 

    protected void checkLocationSettings() { 
     PendingResult<LocationSettingsResult> result = 
       LocationServices.SettingsApi.checkLocationSettings(
         mGoogleApiClient, 
         mLocationSettingsRequest 
       ); 
     result.setResultCallback(this); 
    } 

    protected void startLocationUpdates() { 
     try { 
      LocationServices.FusedLocationApi.requestLocationUpdates(
        mGoogleApiClient, 
        mLocationRequest, 
        this 
      ).setResultCallback(new ResultCallback<Status>() { 
       @Override 
       public void onResult(Status status) { 
        mRequestingLocationUpdates = true; 
       } 
      }); 
     } catch (SecurityException e) { 
      Log.i(TAG, e.getMessage()); 
     } 

    } 

    protected void stopLocationUpdates() { 
     LocationServices.FusedLocationApi.removeLocationUpdates(
       mGoogleApiClient, 
       this 
     ).setResultCallback(new ResultCallback<Status>() { 
      @Override 
      public void onResult(Status status) { 
       mRequestingLocationUpdates = false; 
      } 
     }); 
    } 


    @Override 
    protected void onActivityResult(int requestCode, int resultCode, Intent data) { 
     switch (requestCode) { 
      // Check for the integer request code originally supplied to startResolutionForResult(). 
      case REQUEST_CHECK_SETTINGS: 
       switch (resultCode) { 
        case Activity.RESULT_OK: 
         Log.i(TAG, "User agreed to make required location settings changes."); 
         startLocationUpdates(); 
        case Activity.RESULT_CANCELED: 
         Log.i(TAG, "User chose not to make required location settings changes."); 
         break; 
       } 
       break; 
     } 
    } 


    @Override 
    public void onConnected(@Nullable Bundle bundle) { 
     Log.d(TAG, "Connected"); 
    } 

    @Override 
    public void onLocationChanged(Location location) { 
     Log.d(TAG, "LocationChanged"); 
     if (location != null) { 
      mCurrentLocation = location; 
      Log.d(TAG, "Latitude: " + location.getLatitude() + "\n" + "Longitude: " + location.getLongitude()); 
     } 
    } 

    @Override 
    public void onConnectionFailed(@NonNull ConnectionResult connectionResult) { 

    } 

    @Override 
    public void onConnectionSuspended(int i) { 

    } 




    @Override 
    public void onResult(LocationSettingsResult locationSettingsResult) { 
     final Status status = locationSettingsResult.getStatus(); 
     switch (status.getStatusCode()) { 
      case LocationSettingsStatusCodes.SUCCESS: 
       Log.i(TAG, "All location settings are satisfied."); 
       startLocationUpdates(); 
       break; 
      case LocationSettingsStatusCodes.RESOLUTION_REQUIRED: 
       Log.i(TAG, "Location settings are not satisfied. Show the user a dialog to" + 
         "upgrade location settings "); 
       try { 
        status.startResolutionForResult(FindPartyActivity.this, REQUEST_CHECK_SETTINGS); 
       } catch (IntentSender.SendIntentException e) { 
        Log.i(TAG, "PendingIntent unable to execute request."); 
       } 
       break; 
      case LocationSettingsStatusCodes.SETTINGS_CHANGE_UNAVAILABLE: 
       Log.i(TAG, "Location settings are inadequate, and cannot be fixed here. Dialog " + 
         "not created."); 
       break; 
     } 
    } 


    @Override 
    public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) { 
     Log.d(TAG, "requestCode---" + requestCode + "  " + "grantResults----" + grantResults); 
     switch (requestCode) { 
      case MarshMallowPermission.LOCATION_PERMISSION_REQUEST_CODE: 
       if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) { 
        Log.d(TAG, "Permissions Grant"); 
        checkLocationSettings(); 
       } else { 
        //Permissions Deny 
       } 
     } 
    } 
}