Android的MapView類不圍繞點

Question

我有一個MapView，但一旦我加了一個我似乎for循環不能夠在GeoPoint對象:(。任何想法中心？

CODE

public class MainActivity extends MapActivity 



{ 

public GeoPoint point; 
TapControlledMapView mapView; // use the custom TapControlledMapView 
List<Overlay> mapOverlays; 
Drawable drawable; 
SimpleItemizedOverlay itemizedOverlay; 


@Override 
public void onCreate(Bundle savedInstanceState) 
{ 
super.onCreate(savedInstanceState); 
setContentView(R.layout.main); 


    mapView = (TapControlledMapView) findViewById(R.id.mapview); 
    mapView.setBuiltInZoomControls(true); 
    mapView.setSatellite(false); 
    // dismiss balloon upon single tap of MapView (iOS behavior) 
    mapView.setOnSingleTapListener(new OnSingleTapListener() {  
     public boolean onSingleTap(MotionEvent e) { 
      itemizedOverlay.hideAllBalloons(); 
      return true; 
     } 
    }); 

    mapOverlays = mapView.getOverlays(); 

    // first overlay 
    drawable = getResources().getDrawable(R.drawable.marker2); 



    itemizedOverlay = new SimpleItemizedOverlay(drawable, mapView); 
    // set iOS behavior attributes for overlay 
    itemizedOverlay.setShowClose(false); 
    itemizedOverlay.setShowDisclosure(true); 
    itemizedOverlay.setSnapToCenter(false); 

    InputStream is = null; 
     try { 
      is = getAssets().open("****.****"); 
     } catch (IOException e) { 
      // TODO Auto-generated catch block 
      e.printStackTrace(); 
     } 
     int size = 0; 
     try { 
      size = is.available(); 
     } catch (IOException e2) { 
      // TODO Auto-generated catch block 
      e2.printStackTrace(); 
     } 

     byte[] buffer = new byte[size]; 
     try { 
      is.read(buffer); 
     } catch (IOException e1) { 
      // TODO Auto-generated catch block 
      e1.printStackTrace(); 
     } 
     try { 
      is.close(); 
     } catch (IOException e) { 
      // TODO Auto-generated catch block 
      e.printStackTrace(); 
     } 
     String str = new String(buffer); 
     String jsonString = null; 
     try { 
      jsonString = str; 
     } catch (IllegalStateException e1) { 
      // TODO Auto-generated catch block 
      e1.printStackTrace(); 
     } 
     // Create a JSON object that we can use from the String 
     JSONObject json = null; 
     try { 
      json = new JSONObject(jsonString); 
     } catch (JSONException e1) { 
      // TODO Auto-generated catch block 
      e1.printStackTrace(); 
     } 

        try{ 

     JSONArray jsonArray = json.getJSONArray("groups"); 
     Log.e("log_tag", "Opening JSON Array 'Groups'"); 
      for(int i=0;i < jsonArray.length();i++){       

       JSONObject jsonObject = jsonArray.getJSONObject(i); 

        String latitude = jsonObject.getString("latitude"); 
        String longitude = jsonObject.getString("longitude"); 
        String name = jsonObject.getString("name"); 
        String address = jsonObject.getString("street"); 
        double lat = Double.parseDouble(latitude); 
        double lng = Double.parseDouble(longitude); 
        double searchLat = Double.parseDouble("-31.4333"); 
        double searchLon = Double.parseDouble("152.9000"); 

       double distance; 

       Location locationA = new Location("point A"); 

       locationA.setLatitude(searchLat); 
       locationA.setLongitude(searchLon); 

       Location locationB = new Location("point B"); 

       locationB.setLatitude(lat); 
       locationB.setLongitude(lng); 

       distance = locationA.distanceTo(locationB); 

        if (distance <= 1000 * 10) { 

         Log.e("log_tag", "ADDING GEOPOINT"+name); 

          point = new GeoPoint(
           (int) (lat * 1E6), 
           (int) (lng * 1E6)); 
         OverlayItem overlayItem = new OverlayItem(point, name, 
           address); 
         itemizedOverlay.addOverlay(overlayItem); 


       } 
         } 
        }catch(JSONException e)  { 
        Log.e("log_tag", "Error parsing data "+e.toString()); 
       } 

        itemizedOverlay.populateNow(); 

        mapOverlays.add(itemizedOverlay); 
         if (savedInstanceState == null) { 

          final MapController mc = mapView.getController(); 


          mc.animateTo(point); 
          mc.setZoom(12); 

         } else { 

          // example restoring focused state of overlays 
          int focused; 
          focused = savedInstanceState.getInt("focused_1", -1); 
          if (focused >= 0) { 
           itemizedOverlay.setFocus(itemizedOverlay.getItem(focused)); 
          } 

         }} 




@Override 
protected boolean isRouteDisplayed() { 
    // TODO Auto-generated method stub 
    return false; 
}} 

Answer 1

你應該使用下面的代碼使你指向地圖中心的位置

MapController controller = mapView.getController(); 
controller.setCenter(youtgeopoint);