java.lang.NoClassDefFoundError $$ $$在Kotlin中内联$ forEach $ lambda $ 1 [英] java.lang.NoClassDefFoundError $$inlined$forEach$lambda$1 in Kotlin

问题描述

我目前正在与Kotlin一起在1.1.1版中开发Android应用程序

I am currently working on an Android application with Kotlin in version 1.1.1

在我的代码中，我具有多个forEach结构的含义，以便读取多个MutableList和MutableMap.

In my code, I have imbrication of several forEach structures in order to read several MutableList and MutableMap.

不幸的是，我的应用程序崩溃并显示以下堆栈跟踪:

Unfortunately, my app crashes with the following stacktrace :

java.lang.NoClassDefFoundError: com.package.fragment.ReminderAddFragment $ onRetrieveBusinessObjects $$内联$ forEach $ lambda $ 1 在 com.package.fragment.ReminderAddFragment.onRetrieveBusinessObjects(ReminderAddFragment.kt:275) 在 com.smartnsoft.droid4me.app.Droid4mizer.onRetrieveBusinessObjects(Droid4mizer.java:552) 在 com.smartnsoft.droid4me.app.Droid4mizer.onRetrieveBusinessObjectsInternal(Droid4mizer.java:606) 在 com.smartnsoft.droid4me.app.Droid4mizer.access $ 000(Droid4mizer.java:46) 在com.smartnsoft.droid4me.app.Droid4mizer $ 1.run(Droid4mizer.java:197) 在 java.util.concurrent.Executors $ RunnableAdapter.call(Executors.java:423) 在java.util.concurrent.FutureTask.run(FutureTask.java:237)在 java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1113) 在 java.util.concurrent.ThreadPoolExecutor $ Worker.run(ThreadPoolExecutor.java:588) 在java.lang.Thread.run(Thread.java:818)

java.lang.NoClassDefFoundError: com.package.fragment.ReminderAddFragment$onRetrieveBusinessObjects$$inlined$forEach$lambda$1 at com.package.fragment.ReminderAddFragment.onRetrieveBusinessObjects(ReminderAddFragment.kt:275) at com.smartnsoft.droid4me.app.Droid4mizer.onRetrieveBusinessObjects(Droid4mizer.java:552) at com.smartnsoft.droid4me.app.Droid4mizer.onRetrieveBusinessObjectsInternal(Droid4mizer.java:606) at com.smartnsoft.droid4me.app.Droid4mizer.access$000(Droid4mizer.java:46) at com.smartnsoft.droid4me.app.Droid4mizer$1.run(Droid4mizer.java:197) at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:423) at java.util.concurrent.FutureTask.run(FutureTask.java:237) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1113) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:588) at java.lang.Thread.run(Thread.java:818)

此处是代码

tutorialCategories.forEach { (_, _, _, _, _, tutorials) ->
  tutorials.forEach { tutorial ->
    if (tutorial.id == simpleReminderFromExtra.tutorialId)
    {
      //...
      val mapOfreminders = mutableMapOf<Int, MutableList<Reminder>>()
      val reminders = ReminderServices.getReminderByTutorialId(simpleReminderFromExtra.tutorialId)

      reminders.forEach { reminder ->
        //...
      }

      mapOfreminders.forEach { _, finalReminders ->
        //...

        finalReminders.forEach { reminder ->
          //...
        }

        //...
      }
    }
  }
}

位置:

• tutorialCategories是List;
• tutorials是List;
• reminders是List;

• tutorialCategories is a List ;
• tutorials is a List ;
• reminders is a List ;

代码的第275行是mapOfreminders.forEach { _, finalReminders ->.

在调试器中，我可以评估mapOfreminders变量，一切似乎都很好.

In the debugger, I can evaluate the mapOfreminders variable and everything seems to be alright.

如果有人可以帮助您解决此问题！

If someone can help to resolve this issue !

推荐答案

阅读了Dan Lew的

After reading Dan Lew's post a couple days ago, I'll make a suggestion that this can be caused by using Map.forEach { k, v -> } method from Java 8, which may be unavailable in Android runtime.

您可以尝试使用另一个 forEach 带有来自Kotlin标准库的单个输入参数:

You could try to use another forEach with the single entry parameter that comes from the Kotlin standard library:

mapOfreminders.forEach { (_, finalReminders) -> }

此处，括号用于将输入参数分解为两个变量:被忽略的键和finalReminders值.

Here the parentheses are used to destructure entry parameter into two variables: ignored key and finalReminders value.

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