android – java.util.ConcurrentModificationException在MapView上
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小伙子们
我很多天都面临着非常奇怪的问题.我正在尝试频繁更新叠加层.所以有时我在地图上触摸时会得到“java.util.ConcurrentModificationException”,或者当地图试图更新叠加时有时会得到但是我找不到这个错误即将到来的完美线.
02-17 14:56:01.621: W/dalvikvm(3653): threadid=1: thread exiting with uncaught exception (group=0x40015560)
02-17 14:56:01.631: E/AndroidRuntime(3653): FATAL EXCEPTION: main
02-17 14:56:01.631: E/AndroidRuntime(3653): java.util.ConcurrentModificationException
02-17 14:56:01.631: E/AndroidRuntime(3653): at java.util.ArrayList$ArrayListIterator.next(ArrayList.java:576)
02-17 14:56:01.631: E/AndroidRuntime(3653): at com.google.android.maps.OverlayBundle.draw(OverlayBundle.java:41)
02-17 14:56:01.631: E/AndroidRuntime(3653): at com.google.android.maps.MapView.onDraw(MapView.java:530)
02-17 14:56:01.631: E/AndroidRuntime(3653): at android.view.View.draw(View.java:6880)
02-17 14:56:01.631: E/AndroidRuntime(3653): at android.view.ViewGroup.drawChild(ViewGroup.java:1646)
02-17 14:56:01.631: E/AndroidRuntime(3653): at android.view.ViewGroup.dispatchDraw(ViewGroup.java:1373)
02-17 14:56:01.631: E/AndroidRuntime(3653): at android.view.ViewGroup.drawChild(ViewGroup.java:1644)
02-17 14:56:01.631: E/AndroidRuntime(3653): at android.view.ViewGroup.dispatchDraw(ViewGroup.java:1373)
02-17 14:56:01.631: E/AndroidRuntime(3653): at android.view.View.draw(View.java:6883)
02-17 14:56:01.631: E/AndroidRuntime(3653): at android.widget.FrameLayout.draw(FrameLayout.java:357)
02-17 14:56:01.631: E/AndroidRuntime(3653): at android.view.ViewGroup.drawChild(ViewGroup.java:1646)
02-17 14:56:01.631: E/AndroidRuntime(3653): at android.view.ViewGroup.dispatchDraw(ViewGroup.java:1373)
02-17 14:56:01.631: E/AndroidRuntime(3653): at android.view.View.draw(View.java:6883)
02-17 14:56:01.631: E/AndroidRuntime(3653): at android.widget.FrameLayout.draw(FrameLayout.java:357)
02-17 14:56:01.631: E/AndroidRuntime(3653): at android.view.ViewGroup.drawChild(ViewGroup.java:1646)
02-17 14:56:01.631: E/AndroidRuntime(3653): at android.view.ViewGroup.dispatchDraw(ViewGroup.java:1373)
02-17 14:56:01.631: E/AndroidRuntime(3653): at android.view.View.draw(View.java:6883)
02-17 14:56:01.631: E/AndroidRuntime(3653): at android.widget.FrameLayout.draw(FrameLayout.java:357)
02-17 14:56:01.631: E/AndroidRuntime(3653): at com.android.internal.policy.impl.PhoneWindow$DecorView.draw(PhoneWindow.java:1862)
02-17 14:56:01.631: E/AndroidRuntime(3653): at android.view.ViewRoot.draw(ViewRoot.java:1522)
02-17 14:56:01.631: E/AndroidRuntime(3653): at android.view.ViewRoot.performTraversals(ViewRoot.java:1258)
02-17 14:56:01.631: E/AndroidRuntime(3653): at android.view.ViewRoot.handleMessage(ViewRoot.java:1859)
02-17 14:56:01.631: E/AndroidRuntime(3653): at android.os.Handler.dispatchMessage(Handler.java:99)
02-17 14:56:01.631: E/AndroidRuntime(3653): at android.os.Looper.loop(Looper.java:130)
02-17 14:56:01.631: E/AndroidRuntime(3653): at android.app.ActivityThread.main(ActivityThread.java:3683)
02-17 14:56:01.631: E/AndroidRuntime(3653): at java.lang.reflect.Method.invokeNative(Native Method)
02-17 14:56:01.631: E/AndroidRuntime(3653): at java.lang.reflect.Method.invoke(Method.java:507)
02-17 14:56:01.631: E/AndroidRuntime(3653): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839)
02-17 14:56:01.631: E/AndroidRuntime(3653): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597)
02-17 14:56:01.631: E/AndroidRuntime(3653): at dalvik.system.NativeStart.main(Native Method)
我正在使用Balloon Overlay
我认为它在“mapview.getOverlay()”上抛出错误,因为它在1秒钟内调用了4-5次.
谢谢,
CapDroid
这是代码流..
我的线程代码….
Thread connection = new Thread(){
public void run() {
try {
while (my condition)
{
try
{
//This method should be call every seconds
updateMethod();
}
catch (Exception e)
{
e.printStackTrace();
break;
}
}
}
catch (Exception e)
{
}
}
};
这是我的updateMethod();
在这段代码中,hashmapOverlay是HashMap,如下所示
public static Map<String,MyItemizedOverlay> hashmapOverlay;
public void updateMethod()
{
if(hashmapOverlay.containsKey(id))
{
mapview.getOverlays().remove(hashmapOnlineFriendsOverlay.get(id));
}
MyItemizedOverlay mMyItemizedOverlay = new MyItemizedOverlay(drawable, mapview);
OverlayItem overlayItem = new OverlayItem(gp,title ,snippet);
mMyItemizedOverlay.addOverlay(overlayItem);
hashmapOverlay.put(id, mMyItemizedOverlay);
addOverlayMethod(mActivity, mapView, mMyItemizedOverlay);
}
这是我的addOverlayMethod
addOverlayMethod(Activity mActivity, final MapView mapView, final Object mObject)
{
mActivity.runOnUiThread(new Runnable(){
@Override
public void run()
{
try {
MyItemizedOverlay overlay = (MyItemizedOverlay) mObject;
mapView.getOverlays().add(overlay);
} catch (Exception e)
{}
}
});
}
解决方法:
你可以做一个工作,
步骤如下.
>制作Pendingnotification类(修改细节).
>列出Pendingnotification.
>当任何通知收到dnt直接修改它时,收集所有修改并放入堆栈(Pendingnotification类)即.将其添加到Pendingnotification列表中.
>现在逐个修改对象,并在完成工作时删除相同的对象.
同样的方式跟随直到Pendingnotification List变空.
并且还要注意,任何修改都必须在UI线程中执行,而不是在NonUI线程中执行
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