领域NoClassDefFoundError:rx.Observable [英] Realm NoClassDefFoundError: rx.Observable

问题描述

我遇到了Realm文档中指出的问题:

I am experiencing an issue that is pointed out in Realm's documentation:

Jackson Databind

Jackson Databind是一个用于将JSON数据绑定到Java类的库.

Jackson Databind is a library for binding JSON data to Java classes.

Jackson使用反射来执行数据绑定.这有冲突 Realm对RxJava的支持，因为RxJava可能无法用于 类加载器.这可能会导致看起来像这样的异常 这个:

Jackson uses reflection to perform the data binding. This conflicts with Realm’s support for RxJava, as RxJava might not be available to the class loader. This can result in an exception that looks like this:

Copy to clipboardjava.lang.NoClassDefFoundError: rx.Observable
at libcore.reflect.InternalNames.getClass(InternalNames.java:55)
...

这是建议的解决方法:

这可以通过将RxJava添加到您的项目或创建来解决 两个空的虚拟文件，如下所示.

This can be fixed by either adding RxJava to your project or create two empty dummy files that looks like the following.

Copy to clipboard// File 1
package io.reactivex;

public class Flowable {
}


// File 2
package io.reactivex;

public class Observable {
}

此问题也已报告给Jackson项目此处.

This issue has also been reported to the Jackson project here.

问题:我在哪里创建文件，使它们不具有我的应用程序的程序包名称? (例如:com.myApp.myPackage)

旁注:我正在SimpleXml而不是Jackson上体验(也许simplexml使用jackson?).我看到了2个错误:

Side note: I'm experiencing this from SimpleXml, not Jackson (maybe simplexml uses jackson?). I've seen 2 errors:

1. 领域NoClassDefFoundError:rx.Observable领域
2. NoClassDefFoundError:io.reactivex.Observable

推荐答案

您所使用的Realm早于v4.0.0，因此您需要创建包rx和一个名为Observable的虚拟类.但是您只需要在src/main/java/rx中创建它即可.

You are using Realm older than v4.0.0, so you need to create package rx, and the dummy class called Observable. But you just need to create it in src/main/java/rx.

package rx;

public class Observable {
}

对于Realm 4.0.0+，您需要在src/main/java/io/reactivex中.

For Realm 4.0.0+, you need in src/main/java/io/reactivex.

package io.reactivex;

public class Observable {
}

和

package io.reactivex;

public class Flowable {
}

和

package io.reactivex;

public enum BackpressureStrategy {
  MISSING,
  ERROR,
  BUFFER,
  DROP,
  LATEST
}

这篇关于领域NoClassDefFoundError:rx.Observable的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！