Android Studio无法运行项目 - 错误：任务'：app：preDexDebug'的执行失败。

我已经将自己创建的lib（以Intellij Idea 14编码）添加到我现有的android studio项目中，但现在我无法构建它运行它。Android Studio无法运行项目 - 错误：任务'：app：preDexDebug'的执行失败。

我使用了Java版本8 for both！

添加此：

android { 
    ... 
    compileOptions { 
     sourceCompatibility JavaVersion.VERSION_1_8 
     targetCompatibility JavaVersion.VERSION_1_8 
    } 
    ... 
}

没有解决我的问题！同时重新启动Android Studio或清理现金不起作用。

那么接下来我可以尝试什么？

完整的错误消息：

Information:Gradle tasks [:app:assembleDebug] 
:app:preBuild UP-TO-DATE 
:app:preDebugBuild UP-TO-DATE 
:app:checkDebugManifest 
:app:preReleaseBuild UP-TO-DATE 
:app:prepareComAndroidSupportAppcompatV72311Library UP-TO-DATE 
:app:prepareComAndroidSupportDesign2311Library UP-TO-DATE 
:app:prepareComAndroidSupportRecyclerviewV72311Library UP-TO-DATE 
:app:prepareComAndroidSupportSupportV42311Library UP-TO-DATE 
:app:prepareDebugDependencies 
:app:compileDebugAidl UP-TO-DATE 
:app:compileDebugRenderscript UP-TO-DATE 
:app:generateDebugBuildConfig UP-TO-DATE 
:app:generateDebugAssets UP-TO-DATE 
:app:mergeDebugAssets UP-TO-DATE 
:app:generateDebugResValues UP-TO-DATE 
:app:generateDebugResources UP-TO-DATE 
:app:mergeDebugResources UP-TO-DATE 
:app:processDebugManifest UP-TO-DATE 
:app:processDebugResources UP-TO-DATE 
:app:generateDebugSources UP-TO-DATE 
:app:processDebugJavaRes UP-TO-DATE 
:app:compileDebugJavaWithJavac UP-TO-DATE 
:app:compileDebugNdk UP-TO-DATE 
:app:compileDebugSources UP-TO-DATE 
:app:preDexDebug 
UNEXPECTED TOP-LEVEL EXCEPTION: 
java.lang.RuntimeException: Exception parsing classes 
    at com.android.dx.command.dexer.Main.processClass(Main.java:752) 
    at com.android.dx.command.dexer.Main.processFileBytes(Main.java:718) 
    at com.android.dx.command.dexer.Main.access$1200(Main.java:85) 
    at com.android.dx.command.dexer.Main$FileBytesConsumer.processFileBytes(Main.java:1645) 
    at com.android.dx.cf.direct.ClassPathOpener.processArchive(ClassPathOpener.java:284) 
    at com.android.dx.cf.direct.ClassPathOpener.processOne(ClassPathOpener.java:166) 
    at com.android.dx.cf.direct.ClassPathOpener.process(ClassPathOpener.java:144) 
    at com.android.dx.command.dexer.Main.processOne(Main.java:672) 
    at com.android.dx.command.dexer.Main.processAllFiles(Main.java:574) 
    at com.android.dx.command.dexer.Main.runMonoDex(Main.java:311) 
    at com.android.dx.command.dexer.Main.run(Main.java:277) 
    at com.android.dx.command.dexer.Main.main(Main.java:245) 
    at com.android.dx.command.Main.main(Main.java:106) 
Caused by: com.android.dx.cf.iface.ParseException: bad class file magic (cafebabe) or version (0034.0000) 
    at com.android.dx.cf.direct.DirectClassFile.parse0(DirectClassFile.java:472) 
    at com.android.dx.cf.direct.DirectClassFile.parse(DirectClassFile.java:406) 
    at com.android.dx.cf.direct.DirectClassFile.parseToInterfacesIfNecessary(DirectClassFile.java:388) 
    at com.android.dx.cf.direct.DirectClassFile.getMagic(DirectClassFile.java:251) 
    at com.android.dx.command.dexer.Main.parseClass(Main.java:764) 
    at com.android.dx.command.dexer.Main.access$1500(Main.java:85) 
    at com.android.dx.command.dexer.Main$ClassParserTask.call(Main.java:1684) 
    at com.android.dx.command.dexer.Main.processClass(Main.java:749) 
    ... 12 more 
1 error; aborting 
Error:Execution failed for task ':app:preDexDebug'. 
> com.android.ide.common.process.ProcessException: org.gradle.process.internal.ExecException: Process 'command '/usr/local/java/jdk1.8.0_65/bin/java'' finished with non-zero exit value 1 
Information:BUILD FAILED 
Information:Total time: 5.614 secs 
Information:1 error 
Information:0 warnings 
Information:See complete output in console

来源

2015-12-09 johni07

看看这个http://stackoverflow.com/questions/32397160/maven-android-project-does-not-work-with-java-8 – RafaelC

我解决我的问题：

了Android Studio代码是正确的，但在思想的lib项目的Java SDK 1.8设置。将其更改为1.7后，所有工作都像预期的那样。

Thx拉斐尔为您的提示！

来源

2015-12-10 14:12:30 johni07

Android Studio无法运行项目 - 错误：任务'：app：preDexDebug'的执行失败。

回答

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