Android 错误: java.util.ConcurrentModificationException 解决方法

E/AndroidRuntime: FATAL EXCEPTION: main\n Process: com.example.zhcs6, PID: 22058\n java.util.ConcurrentModificationException\n at java.util.ArrayList$Itr.next(ArrayList.java:860)\n at com.example.zhcs6.ZhbsActivity.BusTwoActivity.onCreate$lambda-2$lambda-1(BusTwoActivity.kt:39)\n at com.example.zhcs6.ZhbsActivity.BusTwoActivity.$r8$lambda$Iqon2xL8e7V9mpWieq-oFtE2BLU(Unknown Source:0)\n at com.example.zhcs6.ZhbsActivity.BusTwoActivity$$ExternalSyntheticLambda0.onSelectedDayChange(Unknown Source:8)\n at android.widget.CalendarViewMaterialDelegate$1.onDaySelected(CalendarViewMaterialDelegate.java:139)\n at android.widget.DayPickerView$3.onDaySelected(DayPickerView.java:176)\n at android.widget.DayPickerPagerAdapter$1.onDayClick(DayPickerPagerAdapter.java:321)\n at android.widget.SimpleMonthView.onDayClicked(SimpleMonthView.java:1021)\n at android.widget.SimpleMonthView.onTouchEvent(SimpleMonthView.java:371)\n at android.view.View.dispatchTouchEvent(View.java:11725)\n at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2961)\n at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2650)\n at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2961)\n at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2650)\n at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2961)\n at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2650)\n at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2961)\n at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2650)\n at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2961)\n at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2650)\n at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2961)\n at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2650)\n at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2961)\n at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2650)\n at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2961)\n at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2650)\n at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2961)\n at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2650)\n at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2961)\n at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2650)\n at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2961)\n at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2650)\n at com.android.internal.policy.DecorView.superDispatchTouchEvent(DecorView.java:445)\n at com.android.internal.policy.PhoneWindow.superDispatchTouchEvent(PhoneWindow.java:1828)\n at android.app.Activity.dispatchTouchEvent(Activity.java:3292)\n at androidx.appcompat.view.WindowCallbackWrapper.dispatchTouchEvent(WindowCallbackWrapper.java:69)\n at com.android.internal.policy.DecorView.dispatchTouchEvent(DecorView.java:407)\n at android.view.View.dispatchPointerEvent(View.java:11964)\n at android.view.ViewRootImpl$ViewPostImeInputStage.processPointerEvent(ViewRootImpl.java:4776)\n at android.view.ViewRootImpl$ViewPostImeInputStage.onProcess(ViewRootImpl.java:4590)\n at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:4128)\n at android.view.ViewRootImpl$InputStage.onDeliverToNext(ViewRootImpl.java:4181)\n at android.view.ViewRootImpl$InputStage.forward(ViewRootImpl.java:4147)\n at android.view.ViewRootImpl$AsyncInputStage.forward(ViewRootImpl.java:4274)\n at android.view.ViewRootImpl$InputStage.apply(ViewRootImpl.java:4155)\n at android.view.ViewRootImpl$AsyncInputStage.apply(ViewRootImpl.java:4331)\n at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:4128)\n at android.view.ViewRootImpl$InputStage.onDeliverToNext(ViewRootImpl.java:4181)\n at android.view.ViewRootImpl$InputStage.forward(ViewRootImpl.java:4147)\n at android.view.ViewRootImpl$InputStage.apply(ViewRootImpl.java:4155)\n at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:4128)\n at android.view.ViewRootImpl.deliverInputEvent(ViewRootImpl.java:6642)\nE/AndroidRuntime: at android.view.ViewRootImpl.doProcessInputEvents(ViewRootImpl.java:6616)\n at android.view.ViewRootImpl.enqueueInputEvent(ViewRootImpl.java:6577)\n at android.view.ViewRootImpl$WindowInputEventReceiver.onInputEvent(ViewRootImpl.java:6745)\n at android.view.InputEventReceiver.dispatchInputEvent(InputEventReceiver.java:185)\n at android.os.MessageQueue.nativePollOnce(Native Method)\n at android.os.MessageQueue.next(MessageQueue.java:325)\n at android.os.Looper.loop(Looper.java:142)\n at android.app.ActivityThread.main(ActivityThread.java:6541)\n at java.lang.reflect.Method.invoke(Native Method)\n at com.android.internal.os.Zygote$MethodAndArgsCaller.run(Zygote.java:240)\n at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:767)\n这个错误是 "java.util.ConcurrentModificationException"，表示在迭代集合时，通过集合的方法修改了集合的结构。具体来说，在 "com.example.zhcs6.ZhbsActivity.BusTwoActivity.onCreate$lambda-2$lambda-1" 方法中的第 39 行出现了这个错误。\n\n为了解决这个错误，你可以尝试使用迭代器来遍历集合，并使用迭代器的方法来修改集合的结构，而不是直接使用集合的方法。这样可以避免并发修改异常。\n\n另外，你还可以检查代码中是否有其他地方同时对集合进行了修改，例如在多个线程中同时修改了集合的结构。可以通过添加同步机制来避免这种并发修改异常。