blocks|key|4948443|text|正如@tech_android已经在this+comment上发布的，要永久解决这个问题，请转到模块设置>+SDK+Location+>+Use+JDK。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|4948444|这将通过使用嵌入式JDK消除对外部Java安装的依赖。|4948445|​|4948446|📷|atomic|4948447|4948448|entityMap|0|LINK|mutability|MUTABLE|url|https://stackoverflow.com/questions/49515100/gradle-sync-failed-with-android-studio-3-1-uninitialized-object-exists-on-backw#comment86058048_49518396|1|IMAGE|IMMUTABLE|imageUrl|https://ask.qcloudimg.com/http-save/yehe-900000/884c109aa892ec4baac4c702f4b94845.png|imageAlt^0|1G|1|1V|1|I|C|0|0|0|0|0|1|1|0|0^^$0|@$1|2|3|4|5|6|7|11|8|@$9|12|A|13|B|C]|$9|14|A|15|B|C]]|D|@$9|16|A|17|1|18]]|E|$]]|$1|F|3|G|5|6|7|19|8|@]|D|@]|E|$]]|$1|H|3|I|5|6|7|1A|8|@]|D|@]|E|$]]|$1|J|3|K|5|L|7|1B|8|@]|D|@$9|1C|A|1D|1|1E]]|E|$]]|$1|M|3|I|5|6|7|1F|8|@]|D|@]|E|$]]|$1|N|3|-4|5|6|7|1G|8|@]|D|@]|E|$]]]|O|$P|$5|Q|R|S|E|$T|U]]|V|$5|W|R|X|E|$Y|Z|10|-4]]]]

As @tech_android already posted in <a href="https://stackoverflow.com/questions/49515100/gradle-sync-failed-with-android-studio-3-1-uninitialized-object-exists-on-backw#comment86058048_49518396">this comment</a>, to solve that problem permanently, go to Module Settings <code>&gt;</code> SDK Location <code>&gt;</code> Use embedded JDK. 

This will remove dependency on the external Java installation by using the embedded JDK.

<a href="https://i.stack.imgur.com/U4SuD.png" rel="noreferrer"><img src="https://i.stack.imgur.com/U4SuD.png" alt="Remove dependency on the external JAVA installation by using the embedded JDK."></a>

blocks|key|128421|text|我猜这是JDK旧版本的一个bug。转到项目结构并将项目更改为最新的JDK，如1.80_72或更高版本。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|128422|希望它能解决你的问题。|128423|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|F|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|G|8|@]|9|@]|A|$]]|$1|D|3|-4|5|6|7|H|8|@]|9|@]|A|$]]]|E|$]]

This is a bug of JDK old versions i guess. Go to the project structure and change your project to latest JDK like 1.80_72 or later versions. 

Hopefully it will fix your problem.

blocks|key|128480|text|它解决了我在使用嵌入式JDK(推荐)选项时的问题|type|unstyled|depth|inlineStyleRanges|entityRanges|data|128481|执行此操作|offset|length|style|BOLD|128482|项目结构->+SDK位置->选择“使用嵌入式JDK(推荐)”|128483|entityMap^0|0|0|5|0|0|U|0^^$0|@$1|2|3|4|5|6|7|L|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|M|8|@$D|N|E|O|F|G]]|9|@]|A|$]]|$1|H|3|I|5|6|7|P|8|@$D|Q|E|R|F|G]]|9|@]|A|$]]|$1|J|3|-4|5|6|7|S|8|@]|9|@]|A|$]]]|K|$]]

It's resolved my issue when I used embedded JDK(recommended) option

Do this:

Project Structure -> SDK Location -> Select "Use embedded JDK(recommended)"

blocks|key|2033255|text|1)更新到最新的JDK版本，在我的例子中是jdk1.8.0_162|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2033256|2)在您的Android+Studio中，选择文件->项目结构->+SDK位置->+JDK位置，写入目录C:\Program+Files\Java\jdk1.8.0_162|2033257|3)重启Android+Studio|2033258|问题已解决|2033259|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|J|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|K|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|L|8|@]|9|@]|A|$]]|$1|F|3|G|5|6|7|M|8|@]|9|@]|A|$]]|$1|H|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|I|$]]

1) Update to the latest JDK Version, in my case jdk1.8.0_162

2) In your Android Studio select File-> Project Structure -> SDK Location -> JDK Location, write the directory C:\Program Files\Java\jdk1.8.0_162

3) Restart Android Studio

Problem Solved

blocks|key|128489|text|Android+Studio:+3.5.3|type|unstyled|depth|inlineStyleRanges|entityRanges|data|128490|gradle插件:+3.5.3|128491|gradle:+5.4.1|128492|平台:+Mac+OS+Mojave+10.14.6+(18G103)|128493|我已经这样做了:项目结构JDK+SDK+Location+->选择“使用嵌入式->+(推荐)”，但它仍然不工作。|128494|当我读到这个article的时候，|offset|length|128495|您可以在gradle.properies添加属性：|128496|org.gradle.java.home=(+JDK主目录路径)|style|BOLD|128497|它起作用了!|128498|entityMap|0|LINK|mutability|MUTABLE|url|https://docs.gradle.org/current/userguide/build_environment.html#build_environment^0|0|0|0|0|0|6|7|0|0|0|0|W|0|0^^$0|@$1|2|3|4|5|6|7|13|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|14|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|15|8|@]|9|@]|A|$]]|$1|F|3|G|5|6|7|16|8|@]|9|@]|A|$]]|$1|H|3|I|5|6|7|17|8|@]|9|@]|A|$]]|$1|J|3|K|5|6|7|18|8|@]|9|@$L|19|M|1A|1|1B]]|A|$]]|$1|N|3|O|5|6|7|1C|8|@]|9|@]|A|$]]|$1|P|3|Q|5|6|7|1D|8|@$L|1E|M|1F|R|S]]|9|@]|A|$]]|$1|T|3|U|5|6|7|1G|8|@]|9|@]|A|$]]|$1|V|3|-4|5|6|7|1H|8|@]|9|@]|A|$]]]|W|$X|$5|Y|Z|10|A|$11|12]]]]

Android Studio: 3.5.3 
gradle plugin: 3.5.3 
gradle: 5.4.1 
platform: Mac OS Mojave 10.14.6 (18G103) 

I had done this:Project Structure -> SDK Location -> Select "Use embedded JDK(recommended)"
but it still not working.

when I read this <a href="https://docs.gradle.org/current/userguide/build_environment.html#build_environment" rel="nofollow noreferrer">article</a>,

you can add a property at gradle.properies:

org.gradle.java.home=(path to JDK home)

it works!

After Updating Android Studio from 3.0 to 3.1 My project gradle syncing failed with the following error. 

<pre><code>Gradle sync failed: Uninitialized object exists on backward branch 70 Exception Details: Location: 
com/android/build/gradle/tasks/BuildArtifactReportTask.newArtifact(Lcom/android/build/api/artifact/BuildableArtifact;)
Lcom/android/build/gradle/tasks/BuildArtifactReportTask$BuildableArtifactData;
</code></pre>

Gradle sync failed with Android Studio 3.1: Uninitialized object exists on backward branch 70

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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在将Android Studio从3.0更新到3.1之后，我的项目gradle同步失败，出现以下错误。Gradle sync failed: Uninitialized object exists on backward branch 70 Exception Details: Location: com/android/build/gradle/tasks/BuildArtifactReport

问与Android Studio 3.1的Gradle同步失败:反向分支70上存在未初始化的对象
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