问谷歌地图准确性问题

EN

public class GeoName {

private String id;
private Geometry geometry;
private String name;

public String getId() {
    return id;
}
public void setId(String id) {
    this.id = id;
}
public Geometry getGeometry() {
    return geometry;
}
public void setGeometry(Geometry geometry) {
    this.geometry = geometry;
}
public String getName() {
    return name;
}
public void setName(String name) {
    this.name = name;
}

}

package com.example.restfulweb;

public class PostalCodeAdapter extends BaseAdapter {

private Context ctx = null;
Location l;
Dialog d;
Double Latt;
Double Longg;

private List<GeoName> names = new ArrayList<GeoName>();

public PostalCodeAdapter(Context ctx, List<GeoName> locations) {
    this.ctx = ctx;
    this.names = locations;
}

@Override
public int getCount() {     

    return names.size();

    }

@Override
public Object getItem(int arg0) {
    return null;
}

@Override
public long getItemId(int arg0) {
    return 0;
}

@Override
public View getView(int arg0, View arg1, ViewGroup arg2) {

    LinearLayout layout = new LinearLayout(ctx);
    AbsListView.LayoutParams params = new AbsListView.LayoutParams(LayoutParams.FILL_PARENT, 
            LayoutParams.FILL_PARENT);
    layout.setLayoutParams(params);

    layout.setOrientation(LinearLayout.HORIZONTAL);

    GeoName location = this.names.get(arg0);

    Location l = location.getGeometry().getLocation();

    Latt = l.getLat();
    Longg = l.getLng();

    TextView value = new TextView(this.ctx);
    value.setText(location.getName());
    value.setMaxHeight(100);
    value.setTypeface(Typeface.DEFAULT, Typeface.NORMAL);
    value.setGravity(Gravity.CENTER);
    value.setOnClickListener(new CityClickListener(location));

    layout.addView(value);

    return layout;
}

class CityClickListener implements OnClickListener {

    private GeoName geoName = null;

    CityClickListener(GeoName name) {
        this.geoName = name;
    }

    @Override
    public void onClick(View v) {

        AlertDialog.Builder builder = new AlertDialog.Builder(ctx);
        builder.setView(createView());
        builder.setTitle("Details of " + geoName.getName());
        builder.setCancelable(true);

        builder.setPositiveButton("OK", new DialogInterface.OnClickListener() {
               public void onClick(DialogInterface dialog, int id) {
                   dialog.cancel();
               }
        });

        AlertDialog alert = builder.create();
        alert.show();

        updateMap();    
    }

    private void updateMap() {

        MapActivity mapAct = (MapActivity)ctx;
        MapView map = (MapView)mapAct.findViewById(R.id.map);
        map.setScrollBarStyle(MapView.SCROLLBARS_INSIDE_INSET);
        map.setBuiltInZoomControls(Boolean.TRUE);
        map.displayZoomControls(Boolean.TRUE);

********** ISSUE: THE PASSED LAT AND LONG VALUES ARE NOT BEING PASSED TO THE OVERLAY **********
        GeoPoint point = new GeoPoint((int)(Latt* 1E6), (int)(Longg * 1E6));
        MapController mc = map.getController();
        mc.setZoom(17);
        mc.setCenter(point);
        mc.animateTo(point);

            List<Overlay> overlay = map.getOverlays();

        overlay.clear();

        Drawable marker = ctx.getResources().getDrawable(R.drawable.marker);
        MyItemizedOverlay overlays = new MyItemizedOverlay(marker, map, ctx);

        OverlayItem pointerConverted = new OverlayItem(point, geoName.getName(), null);

        overlay.add(overlays);
        overlays.addOverlay(pointerConverted);

    }

    private View createView() {

        LinearLayout l = new LinearLayout(ctx);
        l.setOrientation(LinearLayout.VERTICAL);
        LinearLayout.LayoutParams params = new LayoutParams(100, 300);
        l.setLayoutParams(params);

        TextView city = new TextView(ctx);
        city.setText("Supermarket: " + geoName.getName() + "");
        city.setMaxHeight(100);
        city.setTypeface(Typeface.DEFAULT, Typeface.NORMAL);
        city.setGravity(Gravity.CENTER);
        //city.setTextColor(ctx.getResources().getColor(R.color.white));

        TextView orientation = new TextView(ctx);
        //orientation.setText("Orientation : " + geoName.lat + " || " + geoName.lng);
        orientation.setMaxHeight(100);
        orientation.setTypeface(Typeface.DEFAULT, Typeface.NORMAL);
        orientation.setGravity(Gravity.CENTER); 
        l.addView(city);
        l.addView(orientation);

        return l;
    }   
}
}