안드로이드 - 나의 지점에서 대상까지의 거리를 리스트뷰에 나타내려는데 도움좀 부탁드립니다.

현재 나의 지점에서 대상 지점까지 거리를 리스트뷰에 나타내려고 하고 있습니다.

X, Y는 현재 나의 좌표구요...

처음 실행하면 X, Y좌표가 0, 0 으로 계산되어 표시 됩니다.

(디바이스에서 실행했을때, 몇 초 지나면 X, Y 좌표가 제대로 불러와집니다.)

그렇다면, X, Y 좌표가 제대로 불러와졌을때, 거리를 계산해서

리스트에 표시가 되어야하는데, 처음 0, 0으로 계산된 값만 표시가 됩니다...

그래서 notifyDataSetChanged() 를 사용하여, 좌표값이 제대로 불러왔을 때

갱신하려고 했으나 리스트가 전혀 갱신이 되지 않습니다.

clear(), addAll() 도 같이 써봤는데, 이렇게 하면,

리스트뷰에 0, 0으로 계산된 값만 표시되다가

제대로 된 좌표가 불러와지면, 리스트가 사라져버립니다..

몇 일째 이걸로 고민하고 있는데, 부디 도움의 손길을 부탁드립니다.....

import java.util.ArrayList;
 
public class MainActivity extends Activity {
     
    double x,y;
 
    Timer timer;
    LocationManager lm;
    boolean gps_enabled = false;
    boolean network_enabled = false;
     
    private CustomAdater adapter;
    private ArrayList<MyItem> arrayItems;
     
        
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
         
        double eLat = Double.valueOf(x);
        double eLng = Double.valueOf(y);
         
        arrayItems = new ArrayList<MyItem>();
        arrayItems.add(new MyItem("Tom01", SocialUtil.calcDistance(35.000001, 129.000001, eLat, eLng)));
        arrayItems.add(new MyItem("Tom02", SocialUtil.calcDistance(26.000001, 159.000001, eLat, eLng)));
        arrayItems.add(new MyItem("Tom03", SocialUtil.calcDistance(67.000001, 100.000001, eLat, eLng)));
        arrayItems.add(new MyItem("Tom04", SocialUtil.calcDistance(15.000001, 131.000001, eLat, eLng)));
        arrayItems.add(new MyItem("Tom05", SocialUtil.calcDistance(79.000001, 162.000001, eLat, eLng)));
 
        adapter = new CustomAdater(this, R.layout.list_row, arrayItems);
 
        ListView list = (ListView) this.findViewById(android.R.id.list);
        list.setAdapter(adapter);
 
        lm = (LocationManager) this.getSystemService(Context.LOCATION_SERVICE);
         gps_enabled = lm.isProviderEnabled(LocationManager.GPS_PROVIDER);
        network_enabled = lm.isProviderEnabled(LocationManager.NETWORK_PROVIDER);
 
        if (gps_enabled)
            lm.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0, 0,
                    locationListenerGps);
        if (network_enabled)
            lm.requestLocationUpdates(LocationManager.NETWORK_PROVIDER, 0, 0,
                    locationListenerNetwork);
         timer=new Timer();
         timer.schedule(new GetLastLocation(), 20000);
          
    }
     
    public class CustomAdater extends BaseAdapter {
        Context context;
        int itemlayout;
        ArrayList<MyItem> arrayItems;
        LayoutInflater inflater;
 
        public CustomAdater(Context c, int sublayout, ArrayList<MyItem> list) {
            this.context = c;
            this.itemlayout = sublayout;
            this.arrayItems = list;
 
            inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
            }
 
        @Override
        public int getCount() {
            return arrayItems.size();
        }
 
        @Override
        public Object getItem(int position) {
            return arrayItems.get(position);
        }
 
        @Override
        public long getItemId(int position) {
            return position;
        }
 
        @Override
        public View getView(int position, View convertView, ViewGroup parent) {
             
            final int pos = position;
            if (convertView == null) {
                convertView = inflater.inflate(itemlayout, parent, false);
            }
 
            TextView name = (TextView) convertView.findViewById(R.id.list_name);
            TextView dis = (TextView) convertView.findViewById(R.id.list_distance);
            name.setText(arrayItems.get(position).mname);
            dis.setText(arrayItems.get(position).mdis);
            return convertView;
        }
    }
         
    LocationListener locationListenerGps = new LocationListener() {
        public void onLocationChanged(Location location) {
            timer.cancel();
            x =location.getLatitude();
            y = location.getLongitude();
            lm.removeUpdates(this);
            lm.removeUpdates(locationListenerNetwork);
 
            arrayItems.clear();
            arrayItems.addAll(arrayItems)
            adapter.notifyDataSetChanged();
        }
        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) {
            timer.cancel();
            x = location.getLatitude();
            y = location.getLongitude();
            lm.removeUpdates(this);
            lm.removeUpdates(locationListenerGps);
             
            arrayItems.clear();
            arrayItems.addAll(arrayItems)
            adapter.notifyDataSetChanged();
        }
        public void onProviderDisabled(String provider) {}
        public void onProviderEnabled(String provider) {}
        public void onStatusChanged(String provider, int status, Bundle extras) {}
    };
 
    public static class SocialUtil {
         
        public static String calcDistance(double lat1, double lon1, double lat2, double lon2){
             double EARTH_R, Rad, radLat1, radLat2, radDist;
             double distance, ret;
 
                EARTH_R = 6371000.0; Rad = Math.PI/180; radLat1 = Rad * lat1;
                radLat2 = Rad * lat2; radDist = Rad * (lon1 - lon2);
                distance = Math.sin(radLat1) * Math.sin(radLat2);
                distance = distance + Math.cos(radLat1) * Math.cos(radLat2) * Math.cos(radDist);
                ret = EARTH_R * Math.acos(distance);      
                double rslt = Math.round(Math.round(ret) / 1000);
                String result = rslt + " km";
                if(rslt == 0) result = Math.round(ret) +" m";
                
                return result;
            } 
          
        }
 
    public class MyItem {
         String mname, mdis;
          
            public MyItem(String name, String dis){
                mname = name;
                mdis = dis;
            }
     }  
 
}

나의 지점에서 대상까지의 거리를 리스트뷰에 나타내려는데 도움좀 부탁드립니다.

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