Android 无法删除覆盖项？

我想从我的mapview中删除一个添加的覆盖项，这里我们使用代码，但它没有删除覆盖项。为什么

enter code here

public void addOverLays(){
String [] coordinates = {"31.216487288475037","29.932637214660645" ,"30.084123015403748", "51.5002" , "-0.1262","31.337149143218994"};
double lat = 30.084686279296875,lat2 = 29.987107515335083,lat3=29.987091422080994;
double log = 31.33642494678493, log2 =  31.43912136554718,log3=31.43909454345703;

p = new GeoPoint((int) (lat * 1E6), (int) (log * 1E6));
p2 = new GeoPoint( (int) (lat2 * 1e6), (int) (log2 * 1e6));
p3=new GeoPoint( (int) (lat3 * 1e6), (int) (log3 * 1e6));
mapOverlays = mapView.getOverlays();
drawable = this.getResources().getDrawable(R.drawable.pushpin);
drawable2 = this.getResources().getDrawable(R.drawable.dotred);
drawable3 = this.getResources().getDrawable(R.drawable.ballon);

itemizedOverlay = new HelloItemizedOverlay(drawable,this);
itemizedOverlay2 = new HelloItemizedOverlay(drawable2,this);        
itemizedOverlay3 = new HelloItemizedOverlay(drawable3,this);    
OverlayItem overlayitem = new OverlayItem(p, "Cairo", " over1");
OverlayItem over2 = new OverlayItem(p2, "ulm", "over2");
OverlayItem over3 = new OverlayItem(p3, "offff", "over3");

itemizedOverlay.addOverlay(overlayitem);

mapOverlays.add(itemizedOverlay);

itemizedOverlay2.addOverlay(over2);
mapOverlays.add(itemizedOverlay2);

itemizedOverlay3.addOverlay(over3);
mapOverlays.add(itemizedOverlay3);
mc.setZoom(17); 
mc.animateTo(p1);


 mapView.getOverlays().remove(p);
  mapView.invalidate();
       }

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我认为应该删除覆盖项，而不是地质点：

mapView.getOverlays().remove(itemizedOverlay);

副本。在过去的几天里，你以“fofo”、“jojo”和现在的“koko”的身份一次又一次地问同样的问题。在这些身份下，你没有接受任何完美的答案。这不是寻求Stackoverflow帮助的方法。