Android Studio 意外的顶级异常：

今天，我遇到了一个巨大的错误，不允许我在手机上运行示例项目。

当 Android Studio 构建项目时，它首先显示以下目标：UP-TO-DATE:

....
:demoproject:processDebugResources UP-TO-DATE
:demoproject:generateDebugSources UP-TO-DATE
:demoproject:compileDebugJava UP-TO-DATE
:demoproject:proguardDebug UP-TO-DATE
....

这样的有几十个UP-TO-DATE构建过程中的日志语句。然而，他们总是止步于:demoproject:dexDebug. For dexDebug，我似乎从来没有得到过UP-TO-DATE日志语句。

反而，dexDebug接下来是这个错误：

:demoproject:dexDebug
warning: Ignoring InnerClasses attribute for an anonymous inner class
(com.xyz.corp.sample.project.demo.a) that doesn't come with an
associated EnclosingMethod attribute. This class was probably produced by a
compiler that did not target the modern .class file format. The recommended
solution is to recompile the class from source, using an up-to-date compiler
and without specifying any "-target" type options. The consequence of ignoring
this warning is that reflective operations on this class will incorrectly
indicate that it is *not* an inner class.

现在有几十个这样的Ignoring InnerClasses attribute错误。它们甚至出现在 v4 支持库中的类中，这确实令人困惑。

最后，这些错误以新的语句结束：

UNEXPECTED TOP-LEVEL EXCEPTION:
at com.android.dx.command.dexer.Main.access$300(Main.java:83)
at com.android.dx.cf.direct.DirectClassFile.parse0(DirectClassFile.java:472)
at com.android.dx.command.dexer.Main.main(Main.java:215)
at com.android.dx.command.dexer.Main.runMonoDex(Main.java:280)
at com.android.dx.cf.direct.ClassPathOpener.processOne(ClassPathOpener.java:166)
at com.android.dx.cf.direct.DirectClassFile.parse(DirectClassFile.java:406)
at com.android.dx.command.dexer.Main$1.processFileBytes(Main.java:602)
at com.android.dx.cf.direct.ClassPathOpener.process(ClassPathOpener.java:144)
at com.android.dx.cf.direct.ClassPathOpener.processArchive(ClassPathOpener.java:284)
at com.android.dx.command.dexer.Main.run(Main.java:246)
at com.android.dx.command.dexer.Main.processOne(Main.java:632)
at com.android.dx.command.Main.main(Main.java:106)
...while parsing com/xyz/corp/sdk/AbcSDKConfig.class
1 error; aborting
Error:Execution failed for task ':demoproject:dexDebug'.
> com.android.ide.common.process.ProcessException:    org.gradle.process.internal.ExecException: Process 'command 'C:\Program Files\Java\jdk1.8.0_40\bin\java.exe'' finished with non-zero exit value 1
com.android.dx.cf.iface.ParseException: bad class file magic (cafebabe) or version (0034.0000)
at com.android.dx.command.dexer.Main.processFileBytes(Main.java:673)
at com.android.dx.cf.direct.DirectClassFile.parseToInterfacesIfNecessary(DirectClassFile.java:388)
at com.android.dx.command.dexer.Main.processAllFiles(Main.java:510)
...while parsing com/xyz/corp/sdk/AbcSDKConfig.class
1 error; aborting
at com.android.dx.command.dexer.Main.processClass(Main.java:704)
at com.android.dx.cf.direct.DirectClassFile.getMagic(DirectClassFile.java:251)

我已经查阅了以下链接：

1. Gradle 以非零退出值 1 完成.

2. 编译期间的“Ignoring InnerClasses attribute”警告输出是什么？.

我不确定它们是否适用于我的情况。我什至无法run该项目。我已将 IDE 更新为 SDK Tools 22.0.1 并修改了buildToolsVersion标签在我的build.gradle文件，但无济于事。有人可以指导我如何处理这个错误吗？所有帮助将不胜感激。

哦，这是我的build.gradle:

apply plugin: 'com.android.application'

android {
    compileSdkVersion 22
    buildToolsVersion '22.0.1'

    packagingOptions {
        exclude 'META-INF/LICENSE'
        exclude 'META-INF/NOTICE'
    }

    defaultConfig {
        applicationId "com.xyz.corp.demo.project"
        minSdkVersion 10
        targetSdkVersion 22

        versionCode 2060200
        versionName '2.6.02.00'
    }

    buildTypes {
        debug {

            minifyEnabled true
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }

        release {
            minifyEnabled true
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'

            applicationVariants.all { variant ->
                variant.outputs.each { output ->
                    def file = output.outputFile
                    output.outputFile = new File(file.parent, file.name.replace(".apk", "-" + defaultConfig.versionName + ".apk"))
                }
            }
        }
    }
}

dependencies {
    compile fileTree(dir: 'libs', include: ['*.jar'])
    compile 'com.android.support:appcompat-v7:22.1.0'

    compile project(':xyzSDK')
}

Please HELP !!!

因为它正在报告：bad class file magic (cafebabe) or version (0034.0000)您应该检查您是否使用与运行时尝试使用的相同的 java 版本进行编译。 如果您使用 gradle，您应该在 build.gradle 文件中使用以下或类似的条目：

apply plugin: 'java'
sourceCompatibility = 1.7
targetCompatibility = 1.7

用这个link了解更多 gradle 详细信息。

在 Android Studio 中，从File -> Project Structure -> SDK Location -> JDK Location你应该使用jdk 1.7而不是中继Project level环境。看到这个link对于类似的 Android Studio 问题。