寻找我的位置和计算距离

在我的设备上，一切运行良好，但其他人显示可怕的距离。像它应该是从点300米，它显示6000公里寻找我的位置和计算距离

这里就是我如何得到我的位置：

private SharedPreferences sPref; 
     private LocationManager locationManager; 
    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.start_layout); 

     sPref=getSharedPreferences(ShareTag, MODE_PRIVATE); 
     locationManager = (LocationManager) getSystemService(LOCATION_SERVICE); 
} 

    @Override 
     protected void onResume() { 
     super.onResume(); 
     locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 
      1000 * 10, 10, locationListener); 
     locationManager.requestLocationUpdates(
      LocationManager.NETWORK_PROVIDER, 1000 * 10, 10, 
      locationListener); 

     } 
     private LocationListener locationListener = new LocationListener() { 



      @Override 
      public void onLocationChanged(Location location) { 
       Log.d("MyLog", "my lat="+location.getLatitude()+" splash mylong="+location.getLongitude()); 
      saveCoordinates(location); 
      } 

      @Override 
      public void onProviderDisabled(String provider) { 

      } 

      @Override 
      public void onProviderEnabled(String provider) { 
     //do nothing 
      } 

      @Override 
      public void onStatusChanged(String provider, int status, Bundle extras) { 
       if (provider.equals(LocationManager.GPS_PROVIDER)) { 
       //do nothing 
       } else if (provider.equals(LocationManager.NETWORK_PROVIDER)) { 
        //do nothing 
       } 
      } 
      }; 

      private void saveCoordinates(Location location){ 
       Log.d("MyLog","get in the save coord"); 
       Editor ed=sPref.edit(); 
       ed.putString("myLatitude", ""+location.getLatitude()); 
       ed.putString("myLongtitude", ""+location.getLongitude()); 

       ed.commit(); 

      } 
}

这就是我如何得到我的坐标，并将其储存

然后，当我需要获得距离

sPref=context.getSharedPreferences(ShareTag, context.MODE_PRIVATE); 
      myLatitude=Double.parseDouble(sPref.getString("myLatitude", "0")); 
      myLongtitude=Double.parseDouble(sPref.getString("myLongtitude", "0")); 
float[] result = new float[1]; 
latitude=address.getLatitude(); 
longtitude=address.getLongitude(); 
Location.distanceBetween(latitude, longtitude, myLatitude, myLongtitude, result);

因此，结果[0]显示不切实际的数字。 longtitude=address.getLongitude();和latitude=address.getLatitude();是正确的，所以问题是myLatitude和myLongtitude。我无法查看这些设备的日志以查看用户的坐标是否错误。我的GPS工作不正常（chineese设备），所以我从网络服务提供商获取我的坐标 - 可能这就是他们正确的原因。

我该怎么办？有什么建议？

来源

2014-01-21 user2976267

for get current location ::- 

    Criteria criteria = new Criteria(); 
         LocationManager locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE); 
         String provider = locationManager.NETWORK_PROVIDER; 
         Location location = locationManager.getLastKnownLocation(provider); 
         if(location==null) 
         { 

         }else 
         { 
          longitude = location.getLongitude(); 
          latitude = location.getLatitude(); 
          Log.i("Latitude : ", String.valueOf(latitude)); 
          Log.i("longitude : ", String.valueOf(longitude)); 
         } 



get distance in KM ::-- 

double distance = distFrom(latitude, longitude, latitude1, longitude1); 

double km = distance/0.62137; 

method ::-- 

public static double distFrom(double lat1, double lng1, double lat2, 
      double lng2) { 
     double earthRadius = 3958.75; 
     double dLat = Math.toRadians(lat2 - lat1); 
     double dLng = Math.toRadians(lng2 - lng1); 
     double sindLat = Math.sin(dLat/2); 
     double sindLng = Math.sin(dLng/2); 
     double a = Math.pow(sindLat, 2) + Math.pow(sindLng, 2) 
       * Math.cos(Math.toRadians(lat1)) 
       * Math.cos(Math.toRadians(lat2)); 
     double c = 2 * Math.atan2(Math.sqrt(a), Math.sqrt(1 - a)); 
     double dist = earthRadius * c; 

     return dist; 
    }

来源

2014-01-21 13:57:36 DaxeshKhatri

寻找我的位置和计算距离

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