類在for循環中

Question

新手，我有類：

類PolyOverlay擴展覆蓋{

@Override 
    public void draw(Canvas canvas, MapView mapView, boolean shadow) 
    { 

     try { 

     List<GeoPoint> points = new ArrayList<GeoPoint>(); 
     GeoPoint tmpPoint; 

     double lat2; 
     double lng2; 

     String args[] = {"",""}; 
     args = sitesList.getpolyLine().get(daI).split("\\;"); 
     //Toast.makeText(getApplicationContext(),"T: " + args[0],Toast.LENGTH_SHORT).show(); 


     for (int i = 0; i < args.length; i++) { 
      String coordinates2[] = {"",""}; 
      String args2[] = {"",""}; 
      args2 = args[i].split("\\,"); 

      coordinates2[0]= args2[0]; 
      coordinates2[1]= args2[1]; 

      //Toast.makeText(getApplicationContext(),"T: " + coordinates2[0],Toast.LENGTH_SHORT).show(); 


      lat2= Double.parseDouble(coordinates2[0]); 
      lng2= Double.parseDouble(coordinates2[1]); 
      tmpPoint = new GeoPoint((int) (lat2 * 1E6), (int) (lng2 * 1E6));     
      points.add(tmpPoint); 


     } 


     //for(Polygon polygonTemp : polygonList) 
     //{   
      Path p = new Path(); 
      Projection projection = mapView.getProjection(); 

      boolean firstTime = true; 
      for(GeoPoint geoPoint : points) 
      { 
       Point drawPoint = new Point(); 
       projection.toPixels(geoPoint, drawPoint); 

       if(firstTime) 
       { 
        p.moveTo(drawPoint.x, drawPoint.y); 
        firstTime = false; 
       } 
       else 
       { 
        p.lineTo(drawPoint.x, drawPoint.y); 
       } 
      } 
      p.setFillType(Path.FillType.EVEN_ODD); 

      Paint polyPaint = new Paint(); 
      polyPaint.setStrokeWidth(1); 
      polyPaint.setStyle(Paint.Style.FILL_AND_STROKE); 
      polyPaint.setAntiAlias(true); 
      polyPaint.setColor(Color.BLUE); 
      polyPaint.setAlpha(30); 
      canvas.drawPath(p, polyPaint); 
      firstTime = true; 
     //} 
     super.draw(canvas, mapView, shadow); 
     } catch (Exception e) { 
      Toast.makeText(epapp.this, "Err: " + e, Toast.LENGTH_LONG).show(); 

     } 
    } 

} 

然後一個XML環路我做這裏面：

for (int i = 0; i < sitesList.getStrap().size(); i++) { 

      //icons 

      String pargs[] = sitesList.getCentr().get(i).split("\\,"); 

      String coordinates3[] = {"",""}; 
      coordinates3[0] = pargs[0].toString(); 
      coordinates3[1] = pargs[1].toString(); 

      //Toast.makeText(epapp.this, "Center: " + coordinates3[0], Toast.LENGTH_LONG).show(); 

      double lat2 = Double.parseDouble(coordinates3[0]); 
      double lng2 = Double.parseDouble(coordinates3[1]); 



      np = new GeoPoint(
       (int) (lat2 * 1E6), 
       (int) (lng2 * 1E6)); 
      Drawable drawable = this.getResources().getDrawable(R.drawable.iconresidential); 
      IconItemizedOverlay itemizedoverlay = new IconItemizedOverlay(drawable,this); 


      OverlayItem overlayitem = new OverlayItem(np, "Property Information", "JONES EMERSON ROBERT JR & SARA MARIA<br>1032 Briarwood Dr Wauchula 33873<br>HARDEE County<br>STRAP 05-34-25-0865-00001-0020"); 
      itemizedoverlay.addOverlay(overlayitem); 
      mapView.getOverlays().add(itemizedoverlay); 


      //if (i==1){ 


     //polyString = sitesList.getpolyLine().get(i); 
     daI=i; 
     //polygon 

      PolyOverlay myPolyOverlay = new PolyOverlay(); 
      mapView.getOverlays().add(myPolyOverlay); 

        //} 

     } 

確定，因此「問題「是如果我做// if（i == 1）{在」daI「被設置爲」i「的循環中的一部分，我的」Polygon「顯示在XML中該項目的地圖上，if我「REM」出來，多邊形覆蓋圖總是XML中的最後一項。 xml列表總是有20個項目，並且好像「daI」變量始終爲19（最後一個索引在列表0-19中）

顯然不會做某些事情，所以PolyOverlay類會「完成」在xml循環完成之前？它類似於XML循環蠅通過套「戴」到最後一個和PolyOverlay被載入該最後一個項目的多邊形...

我的圖標就好了BTW在地圖上...

Answer 1

ķ ，我很遲鈍：我不得不這樣做：

int di = 0; 

    PolyOverlay(int n) { 
     di = n; 
    } 

我PolyOvelay類，然後通過 「我」 從XML for循環吧...

PolyOverlay myPolyOverlay =新PolyOverlay（我）;

mapView.getOverlays（）。add（myPolyOverlay）;