Java – Android Studio unexpected top-level exception:

Today I got a critical error that prevented me from running the sample project on my phone.

When Android Studio builds a project, it first displays the following targets as UP-TO-DATE:

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

There are many such UP-TO-DATE log statements during the build process. However, they always stop at :d emoproject:dexDebug. For dexDebug, I never seem to get the UP-TO-DATE log statement.

Instead, dexDebug is followed by this error:

: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.

There are now many such Ignoring InnerClasses attribute errors. They even appear in classes in the v4 support library, which is really puzzling.

Finally, these errors end with a new statement:

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)

I have consulted the following link:

1. Gradle finished with non-zero exit value 1 .

2. What is the “Ignoring InnerClasses attribute” warning output during compilation? .

I’m not sure if they apply to my situation. I can’t even run the project. I’ve updated my IDE to SDK Tools 22.0.1 and modified the buildToolsVersion tag in my build.gradle file, but to no avail. Can someone guide me on how to deal with this error? We would appreciate it.

Oh, and here’s my 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 !!!

Because it is reporting: Bad class file magic (cafebabe) or version (0034.0000) You should check if you are compiling with the same version of Java that you are trying to use at runtime.
If you are using gradle, you should use the following or similar entries in your build.gradle file:

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

Use this link to learn more about gradle details.

In Android Studio, from File -> Project Structure -> SDK Location -> JDK Location You should use JDK 1.7 instead of relying on Project level settings. Look at this link for similar Android Studio issues.