Android 覆盖项使用*1e6添加两个以上的项

在android中添加覆盖项目我想在地图视图中添加覆盖项目！！我来了

public void addOverLays(){

    String [] coordinates = {"30.084262490272522","31.33625864982605" ,"30.084123015403748", "51.5002" , "-0.1262","31.337149143218994"};
    double lat = 30.084262490272522, lat2 = 51.5002,lat3=30.084123015403748;
    double log = 31.33625864982605, log2 = -0.1262,log3=31.337149143218994;

    p = new GeoPoint((int) (lat * 1E6), (int) (log * 1E6));


   p2 = new GeoPoint( (int) (lat2 * 1e6), (int) (log2 * 1e6));

   p3=new GeoPoint( (int) (lat3 * 1000000), (int) (log3 * 1000000));

    mapOverlays = mapView.getOverlays();
    drawable = this.getResources().getDrawable(R.drawable.ballon);
   drawable2 = this.getResources().getDrawable(R.drawable.dotred);

    drawable3 = this.getResources().getDrawable(R.drawable.icon);

        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);

    itemizedOverlay2.addOverlay(over3);
    mapOverlays.add(itemizedOverlay3);
 mc.setZoom(17); 
 //mc.animateTo(p);
}

>

似乎是1000000中的一个错误！但我已经使用了1e6和1e6，但它们是浮动的，1000000是整数，所以怎么办
以下是DDMS中出现的错误>>

04-25 00:27:17.370: ERROR/AndroidRuntime(1788): Uncaught handler: thread main exiting due to uncaught exception
04-25 00:27:17.390: ERROR/AndroidRuntime(1788): java.lang.NullPointerException
04-25 00:27:17.390: ERROR/AndroidRuntime(1788):     at com.google.android.maps.ItemizedOverlay.getItemsAtLocation(ItemizedOverlay.java:617)
04-25 00:27:17.390: ERROR/AndroidRuntime(1788):     at com.google.android.maps.ItemizedOverlay.getItemAtLocation(ItemizedOverlay.java:586)
04-25 00:27:17.390: ERROR/AndroidRuntime(1788):     at com.google.android.maps.ItemizedOverlay.handleMotionEvent(ItemizedOverlay.java:498)
04-25 00:27:17.390: ERROR/AndroidRuntime(1788):     at com.google.android.maps.ItemizedOverlay.onTouchEvent(ItemizedOverlay.java:572)
04-25 00:27:17.390: ERROR/AndroidRuntime(1788):     at com.google.android.maps.OverlayBundle.onTouchEvent(OverlayBundle.java:63)
04-25 00:27:17.390: ERROR/AndroidRuntime(1788):     at com.google.android.maps.MapView.onTouchEvent(MapView.java:620)
04-25 00:27:17.390: ERROR/AndroidRuntime(1788):     at android.view.View.dispatchTouchEvent(View.java:3368)
04-25 00:27:17.390: ERROR/AndroidRuntime(1788):     at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:851)
04-25 00:27:17.390: ERROR/AndroidRuntime(1788):     at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:811)
04-25 00:27:17.390: ERROR/AndroidRuntime(1788):     at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:811)
04-25 00:27:17.390: ERROR/AndroidRuntime(1788):     at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:811)
04-25 00:27:17.390: ERROR/AndroidRuntime(1788):     at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:811)
04-25 00:27:17.390: ERROR/AndroidRuntime(1788):     at com.android.internal.policy.impl.PhoneWindow$DecorView.superDispatchTouchEvent(PhoneWindow.java:1758)
04-25 00:27:17.390: ERROR/AndroidRuntime(1788):     at com.android.internal.policy.impl.PhoneWindow.superDispatchTouchEvent(PhoneWindow.java:1202)
04-25 00:27:17.390: ERROR/AndroidRuntime(1788):     at android.app.Activity.dispatchTouchEvent(Activity.java:1993)
04-25 00:27:17.390: ERROR/AndroidRuntime(1788):     at com.android.internal.policy.impl.PhoneWindow$DecorView.dispatchTouchEvent(PhoneWindow.java:1742)
04-25 00:27:17.390: ERROR/AndroidRuntime(1788):     at android.view.ViewRoot.handleMessage(ViewRoot.java:1549)
04-25 00:27:17.390: ERROR/AndroidRuntime(1788):     at android.os.Handler.dispatchMessage(Handler.java:99)
04-25 00:27:17.390: ERROR/AndroidRuntime(1788):     at android.os.Looper.loop(Looper.java:123)
04-25 00:27:17.390: ERROR/AndroidRuntime(1788):     at android.app.ActivityThread.main(ActivityThread.java:3948)
04-25 00:27:17.390: ERROR/AndroidRuntime(1788):     at java.lang.reflect.Method.invokeNative(Native Method)
04-25 00:27:17.390: ERROR/AndroidRuntime(1788):     at java.lang.reflect.Method.invoke(Method.java:521)
04-25 00:27:17.390: ERROR/AndroidRuntime(1788):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:782)
04-25 00:27:17.390: ERROR/AndroidRuntime(1788):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:540)
04-25 00:27:17.390: ERROR/AndroidRuntime(1788):     at dalvik.system.NativeStart.main(Native Method)

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你犯了什么样的错误

这一行：

itemizedOverlay2.addOverlay(over3);

应该是：

itemizedOverlay3.addOverlay(over3);

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@lolo：使用Eclipse中的adb logcat、DDMS或DDMS透视图来检查logcat并查看与“强制关闭”相关的堆栈跟踪；由于它是一个整数而不是浮动，我该怎么办？问题是当我添加3个项目并触摸屏幕以使缩放强制关闭时，触摸事件，尽管只有2个项目显示缩放选项并正常放大和缩小！解决方案是什么？@lolo:为什么不使用p3=新的地质点（（int）（lat3*1e6），（int）（log3*1e6））；？？@先生，我想这只能做一次，我做了1e6和1e6！！这就是问题所在！还有它的触摸屏问题我真不敢相信我会这么愚蠢！真的非常感谢你，很抱歉占用了你的时间。提前感谢