獲取用戶的當前位置並在firebase數據庫中存儲

我在android應用上工作，我希望用戶在他/她打開特定活動時獲取用戶的位置或用戶的緯度和經度而不使用谷歌地圖的活動，甚至打開它，我用這個代碼，但沒有結果獲取用戶的當前位置並在firebase數據庫中存儲

LocationManager lm = (LocationManager) getSystemService(Context.LOCATION_SERVICE); 
    if (ActivityCompat.checkSelfPermission(this, android.Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(this, android.Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) { 
     return; 
    } 
    if (lm.isProviderEnabled(LocationManager.NETWORK_PROVIDER)) { 
     lm.requestLocationUpdates(LocationManager.NETWORK_PROVIDER, 0, 0, new android.location.LocationListener() { 
      @Override 
      public void onLocationChanged(Location location) { 
       latitude = location.getLatitude(); 
       longitude = location.getLongitude(); 
       LatLng latLng = new LatLng(latitude, longitude); 
       Log.i("loc", latitude+"::"+longitude); 

      } 

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

      } 

      @Override 
      public void onProviderEnabled(String provider) { 

      } 

      @Override 
      public void onProviderDisabled(String provider) { 

      } 
     }); 
    } else if (lm.isProviderEnabled(lm.GPS_PROVIDER)) { 
     lm.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0, 0, new android.location.LocationListener() { 
      @Override 
      public void onLocationChanged(Location location) { 
       latitude = location.getLatitude(); 
       longitude = location.getLongitude(); 
       LatLng latLng = new LatLng(latitude, longitude); 
       Log.i("loc", latitude+"::"+longitude); 

      } 

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

      } 

      @Override 
      public void onProviderEnabled(String provider) { 

      } 

      @Override 
      public void onProviderDisabled(String provider) { 

      } 
     }); 
    }

我把這個代碼在我的onCreate方法，但價值也提前

來源

2017-07-03 mostafa

的位置跟蹤器0.0

感謝服務



    public class LocationTrack extends Service implements LocationListener { 

     private final Context mContext; 


     boolean checkGPS = false; 


     boolean checkNetwork = false; 

     boolean canGetLocation = false; 

     Location loc; 
     double latitude; 
     double longitude; 


     private static final long MIN_DISTANCE_CHANGE_FOR_UPDATES = 10; 


     private static final long MIN_TIME_BW_UPDATES = 1000 * 60 * 1; 
     protected LocationManager locationManager; 

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

     private Location getLocation() { 

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

       // get GPS status 
       checkGPS = locationManager 
         .isProviderEnabled(LocationManager.GPS_PROVIDER); 

       // get network provider status 
       checkNetwork = locationManager 
         .isProviderEnabled(LocationManager.NETWORK_PROVIDER); 

       if (!checkGPS && !checkNetwork) { 
        Toast.makeText(mContext, "No Service Provider is available", Toast.LENGTH_SHORT).show(); 
       } else { 
        this.canGetLocation = true; 

        // if GPS Enabled get lat/long using GPS Services 
        if (checkGPS) { 

         if (ActivityCompat.checkSelfPermission(mContext, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(mContext, 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. 
         } 
         locationManager.requestLocationUpdates(
           LocationManager.GPS_PROVIDER, 
           MIN_TIME_BW_UPDATES, 
           MIN_DISTANCE_CHANGE_FOR_UPDATES, this); 
         if (locationManager != null) { 
          loc = locationManager 
            .getLastKnownLocation(LocationManager.GPS_PROVIDER); 
          if (loc != null) { 
           latitude = loc.getLatitude(); 
           longitude = loc.getLongitude(); 
          } 
         } 


        } 


        /*if (checkNetwork) { 


         if (ActivityCompat.checkSelfPermission(mContext, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(mContext, 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. 
         } 
         locationManager.requestLocationUpdates(
           LocationManager.NETWORK_PROVIDER, 
           MIN_TIME_BW_UPDATES, 
           MIN_DISTANCE_CHANGE_FOR_UPDATES, this); 

         if (locationManager != null) { 
          loc = locationManager 
            .getLastKnownLocation(LocationManager.NETWORK_PROVIDER); 

         } 

         if (loc != null) { 
          latitude = loc.getLatitude(); 
          longitude = loc.getLongitude(); 
         } 
        }*/ 

       } 


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

      return loc; 
     } 

     public double getLongitude() { 
      if (loc != null) { 
       longitude = loc.getLongitude(); 
      } 
      return longitude; 
     } 

     public double getLatitude() { 
      if (loc != null) { 
       latitude = loc.getLatitude(); 
      } 
      return latitude; 
     } 

     public boolean canGetLocation() { 
      return this.canGetLocation; 
     } 

     public void showSettingsAlert() { 
      AlertDialog.Builder alertDialog = new AlertDialog.Builder(mContext); 


      alertDialog.setTitle("GPS is not Enabled!"); 

      alertDialog.setMessage("Do you want to turn on GPS?"); 


      alertDialog.setPositiveButton("Yes", new DialogInterface.OnClickListener() { 
       public void onClick(DialogInterface dialog, int which) { 
        Intent intent = new Intent(Settings.ACTION_LOCATION_SOURCE_SETTINGS); 
        mContext.startActivity(intent); 
       } 
      }); 


      alertDialog.setNegativeButton("No", new DialogInterface.OnClickListener() { 
       public void onClick(DialogInterface dialog, int which) { 
        dialog.cancel(); 
       } 
      }); 


      alertDialog.show(); 
     } 


     public void stopListener() { 
      if (locationManager != null) { 

       if (ActivityCompat.checkSelfPermission(mContext, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(mContext, 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; 
       } 
       locationManager.removeUpdates(LocationTrack.this); 
      } 
     } 

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

     @Override 
     public void onLocationChanged(Location location) { 

     } 

     @Override 
     public void onStatusChanged(String s, int i, Bundle bundle) { 

     } 

     @Override 
     public void onProviderEnabled(String s) { 

     } 

     @Override 
     public void onProviderDisabled(String s) { 

     } 
    }

使用位置跟蹤服務活動像下面



    locationTrack = new LocationTrack(MainActivity.this); 


        if (locationTrack.canGetLocation()) { 


         double longitude = locationTrack.getLongitude(); 
         double latitude = locationTrack.getLatitude(); 

         Toast.makeText(getApplicationContext(), "Longitude:" + Double.toString(longitude) + "\nLatitude:" + Double.toString(latitude), Toast.LENGTH_SHORT).show(); 
        } else { 

         locationTrack.showSettingsAlert(); 
        }

請參閱本link能夠解釋這一點。

來源

2017-11-03 11:49:25 Narasing

獲取用戶的當前位置並在firebase數據庫中存儲

回答

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