Kotlin调用Java平台类型导致llegalStateException [英] Kotlin call Java platform types result in llegalStateException

问题描述

我在我的一个Android类中使用kotlin，当试图从Bundle获取更多内容时，似乎有时会弹出IllegalStateException.

I'm using kotlin in one of my Android classes and it seems like an IllegalStateException sometimes pops up on this line, when trying to get an extra from a Bundle.

keyOrTag = bundle.getString("tag")

val这样声明

val keyOrTag: String

不幸的是，我没有完整的堆栈跟踪记录，因为我从GP控制台注意到了这一点.

Unfortunately I don't have the full stack trace as I've noticed this from the GP Console.

推荐答案

好的，我相信我知道为什么会这样.将其发布为答案，以便其他有相关问题的人可以看到.

Okay I believe I know why that happens. Posting it as an answer so that others with a related issue could see.

添加到捆绑软件中的String "tag"实际上可以是将其发送到Kotlin的Java类中的null.而且由于我没有将val声明为可为空，所以我相信这就是为什么它引发IllegalStateException(是的，kotlin中没有NPE)的原因.

The String "tag" added to the bundle can actually be null in the Java class that sends it over to the Kotlin one. And since I didn't declare the val as nullable I believe that's why it's throwing an IllegalStateException (yup, no NPE in kotlin).

解决方法:

val keyOrTag: String?

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