在android中動態填充地圖

所以我有一個mapView，我想基於數據庫動態填充它。我所能做的每一個的GeoPoint indidivually但由於某些原因，當我嘗試做所有這些不顯示在地圖上的點。如果任何人有任何建議，請讓我知道:-)在android中動態填充地圖

public class FieldTrip extends MapActivity { 
    private MapView map=null; 
    private MyLocationOverlay me=null; 
    private String theLat; 
    private String theLong; 
    private Double theDLat; 
    private Double theDLong; 


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

    map=(MapView)findViewById(R.id.mapView); 

    map.getController().setCenter(getPoint(40.76793169992044, 
              -73.98180484771729)); 
    map.getController().setZoom(17); 
    map.setBuiltInZoomControls(true); 

    Drawable marker=getResources().getDrawable(R.drawable.supaaaa); 

    marker.setBounds(0, 0, marker.getIntrinsicWidth(), 
          marker.getIntrinsicHeight()); 

    map.getOverlays().add(new SitesOverlay(marker)); 

    me=new MyLocationOverlay(this, map); 
    map.getOverlays().add(me); 
    } 

    @Override 
    public void onResume() { 
    super.onResume(); 

    me.enableCompass(); 
    } 

    @Override 
    public void onPause() { 
    super.onPause(); 

    me.disableCompass(); 
    } 

    @Override 
    protected boolean isRouteDisplayed() { 
    return(false); 
    } 

    @Override 
    public boolean onKeyDown(int keyCode, KeyEvent event) { 
    if (keyCode == KeyEvent.KEYCODE_S) { 
     map.setSatellite(!map.isSatellite()); 
     return(true); 
    } 
    else if (keyCode == KeyEvent.KEYCODE_Z) { 
     map.displayZoomControls(true); 
     return(true); 
    } 

    return(super.onKeyDown(keyCode, event)); 
    } 

    private GeoPoint getPoint(double lat, double lon) { 
    return(new GeoPoint((int)(lat*1000000.0), 
          (int)(lon*1000000.0))); 
    } 






private class SitesOverlay extends ItemizedOverlay<OverlayItem> { 
    private List<OverlayItem> items=new ArrayList<OverlayItem>(); 

    ///need to make this dy-NAMIK :p 
    public SitesOverlay(Drawable marker) { 
     super(marker); 


     for (Entry<Integer, FieldTripStop> cur : Statics.fieldTripStops.entrySet()) 
     { 
      // get the FieldTripStop object from the current hash table entry 
      Statics.currentFTStop = cur.getValue(); 
      // concatenate numbers before (all) and after (6) the decimal, since 
      // geopoints only accept 6 numbers past the decimal. 
      theLat = Statics.currentFTStop.latitude; 
      theLong = Statics.currentFTStop.longitude; 
      theDLat = Double.parseDouble(theLat); 
      theDLong = Double.parseDouble(theLong); 

     boundCenterBottom(marker); 

     items.add(new OverlayItem(getPoint(theDLat, 
       theDLong), 
           "RANDOM TEXT?", 
           "RANDOM TEXT LALALA")); 


     } 
     populate(); 
    } 

    @Override 
    protected OverlayItem createItem(int i) { 
     return(items.get(i)); 
    } 

    @Override 
    protected boolean onTap(int i) { 
     Toast.makeText(FieldTrip.this, 
         items.get(i).getSnippet(), 
         Toast.LENGTH_SHORT).show(); 

     return(true); 
    } 

    @Override 
    public int size() { 
     return(items.size()); 
    } 
    } 
}

來源

2012-05-19 cj1098

此代碼將顯示'fieldTripStops'中的所有內容。如果你沒有看到所有的點，那麼'fieldTripStops'沒有你想象的那樣。 – CommonsWare

此代碼看起來對我正確。如果你沒有看到所有的積分，那麼fieldTripStops沒有你想要顯示的所有積分。仔細檢查fieldTripStops集合中的元素。

來源

2012-05-19 23:52:38

在android中動態填充地圖

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