几天来,我一直在努力解决以下问题。我发现有很多与此主题相关的主题,但是所有主题都有些许不同或没有解决方案。
对于我的项目,我创建了一个自定义ItemizedOverlay
并将其添加到我的MapView
中。如果现在删除项目列表中的最后一个项目,则会得到一个IndexOutOfBoundsException
,声称所请求的索引等于ArrayList
的大小。即索引2大小2或索引0大小0。从其他主题告诉我,我已经尝试过populate()
和setLastFocusedIndex(-1)
方法。这些解决了我遇到的其他问题,但是还没有解决。当从列表中删除其他项目时,它可以正常工作,似乎仅对最后一项出现问题。
我得到以下Logcat输出:
01-24 16:11:08.091: E/AndroidRuntime(916): Uncaught handler: thread main exiting due to uncaught exception
01-24 16:11:08.101: E/AndroidRuntime(916): java.lang.IndexOutOfBoundsException: Invalid location 0, size is 0
01-24 16:11:08.101: E/AndroidRuntime(916): at java.util.ArrayList.get(ArrayList.java:341)
01-24 16:11:08.101: E/AndroidRuntime(916): at com.google.android.maps.ItemizedOverlay.getItem(ItemizedOverlay.java:419)
01-24 16:11:08.101: E/AndroidRuntime(916): at com.google.android.maps.ItemizedOverlay.focus(ItemizedOverlay.java:538)
01-24 16:11:08.101: E/AndroidRuntime(916): at com.google.android.maps.ItemizedOverlay.onTap(ItemizedOverlay.java:455)
01-24 16:11:08.101: E/AndroidRuntime(916): at com.google.android.maps.OverlayBundle.onTap(OverlayBundle.java:83)
01-24 16:11:08.101: E/AndroidRuntime(916): at com.google.android.maps.MapView$1.onSingleTapUp(MapView.java:346)
01-24 16:11:08.101: E/AndroidRuntime(916): at android.view.GestureDetector.onTouchEvent(GestureDetector.java:506)
01-24 16:11:08.101: E/AndroidRuntime(916): at com.google.android.maps.MapView.onTouchEvent(MapView.java:628)
01-24 16:11:08.101: E/AndroidRuntime(916): at android.view.View.dispatchTouchEvent(View.java:3709)
01-24 16:11:08.101: E/AndroidRuntime(916): at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:852)
01-24 16:11:08.101: E/AndroidRuntime(916): at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:884)
01-24 16:11:08.101: E/AndroidRuntime(916): at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:884)
01-24 16:11:08.101: E/AndroidRuntime(916): at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:884)
01-24 16:11:08.101: E/AndroidRuntime(916): at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:884)
01-24 16:11:08.101: E/AndroidRuntime(916): at com.android.internal.policy.impl.PhoneWindow$DecorView.superDispatchTouchEvent(PhoneWindow.java:1659)
01-24 16:11:08.101: E/AndroidRuntime(916): at com.android.internal.policy.impl.PhoneWindow.superDispatchTouchEvent(PhoneWindow.java:1107)
01-24 16:11:08.101: E/AndroidRuntime(916): at android.app.Activity.dispatchTouchEvent(Activity.java:2061)
01-24 16:11:08.101: E/AndroidRuntime(916): at com.android.internal.policy.impl.PhoneWindow$DecorView.dispatchTouchEvent(PhoneWindow.java:1643)
01-24 16:11:08.101: E/AndroidRuntime(916): at android.view.ViewRoot.handleMessage(ViewRoot.java:1691)
01-24 16:11:08.101: E/AndroidRuntime(916): at android.os.Handler.dispatchMessage(Handler.java:99)
01-24 16:11:08.101: E/AndroidRuntime(916): at android.os.Looper.loop(Looper.java:123)
01-24 16:11:08.101: E/AndroidRuntime(916): at android.app.ActivityThread.main(ActivityThread.java:4363)
01-24 16:11:08.101: E/AndroidRuntime(916): at java.lang.reflect.Method.invokeNative(Native Method)
01-24 16:11:08.101: E/AndroidRuntime(916): at java.lang.reflect.Method.invoke(Method.java:521)
01-24 16:11:08.101: E/AndroidRuntime(916): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:860)
01-24 16:11:08.101: E/AndroidRuntime(916): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:618)
01-24 16:11:08.101: E/AndroidRuntime(916): at dalvik.system.NativeStart.main(Native Method)
令我困扰的是,它似乎是从标准
ItemizedOverlay
调用方法。我没有添加普通的ItemizedOverlay
,除了构造函数外,我没有在itemizedOverlay
中调用超级方法。仍然在正常的ItemizedOverlay
中似乎仍然出现该错误,对于ArrayList
为空,这是有道理的。我希望有人能指出我正确的方向,因为我真的很困在这里。提前致谢!
这是我的代码:
public class GameItemOverlay extends ItemizedOverlay<Item> {
private ArrayList<Item> mOverlays = new ArrayList<Item>();
public GameItemOverlay(Drawable defaultMarker) {
super(boundCenterBottom(defaultMarker));
setLastFocusedIndex(-1);
populate();
}
public void itemDataReady(){
mOverlays = GameSession.items;
setLastFocusedIndex(-1);
populate();
}
@Override
protected Item createItem(int i) {
return mOverlays.get(i);
}
@Override
public int size() {
return mOverlays.size();
}
@Override
protected boolean onTap(int i){
GameSession.remove(mOverlays.get(i).getID()); //Removes the item according to it's position
setLastFocusedIndex(-1);
populate();
return true;
}
}
最佳答案
我花了一段时间才弄清楚这个问题。我认为这个问题的答案是ItemizedOverlay
不能用于管理(添加和删除)OverlayItem
。您几乎只能将OverlayItem
添加到ItemizedOverlay
,并且如果要更改任何项目,则需要重新创建ItemizedOverlay
(效率不高)。要解决此问题,您需要在ItemizedOverlay
列表中管理OverlayItem
(只有一个Overlay
),而不是在OverlayItem
中管理ItemizedOverlay
。像这样:
public class SomeActivity extends MapActivity {
private SomeMapView mView;
// Rest of the code ...
private void sendRequest(GeoPoint point)
{
List<Overlay> mOverlays = mView.getOverlays();
// Show red marker
OverlayItem item = new OverlayItem(point, "Hello", "world");
MarkerItemizedOverlay itemOverlay = new MarkerItemizedOverlay(drawable, mView);
itemOverlay.addOverlay(item);
mOverlays.add(itemOverlay);
}
}
public class MarkerItemizedOverlay extends ItemizedOverlay<OverlayItem> {
private ArrayList<OverlayItem> mOverlays = new ArrayList<OverlayItem>();
MapView mView;
// Rest of the code ...
@Override
protected boolean onTap(int index) {
List<Overlay> mOverlays = mView.getOverlays();
mOverlays.remove(this);
}
}