Compatibility JavaVersion.VERSION_1_8 breaks tests

[Takhion]

Adding the following to build.gradle (as suggested in the readme and being the only way to force the syntax on Android Studio):

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

...Results in the following exception when trying to run unit tests in Android Studio 0.4.6:

Information:Gradle tasks [:TestApp:assembleDebug, :TestApp:assembleDebugTest]
Information:objc[31058]: Class JavaLaunchHelper is implemented in both /Library/Java/JavaVirtualMachines/jdk1.8.0.jdk/Contents/Home/bin/java and /Library/Java/JavaVirtualMachines/jdk1.8.0.jdk/Contents/Home/jre/lib/libinstrument.dylib. One of the two will be used. Which one is undefined.
Information:UNEXPECTED TOP-LEVEL EXCEPTION:
Information:...while parsing me/eugeniomarletti/testingtests/test/BuildConfig.class
Information:1 error; aborting
Information:1 error
Information:0 warnings
Information:Information:See complete output in console
Error:Execution failed for task ':TestApp:dexDebugTest'.
> com.android.ide.common.internal.LoggedErrorException: Failed to run command:
    /Applications/Android Studio.app/sdk/build-tools/android-4.4.2/dx --dex --output /Users/eugeniomarletti/Dropbox/Projects/TestingTests/TestApp/build/dex/test/debug /Users/eugeniomarletti/Dropbox/Projects/TestingTests/TestApp/build/classes/test/debug /Users/eugeniomarletti/Dropbox/Projects/TestingTests/TestApp/build/dependency-cache/test/debug
  Error Code:
    1
  Output:
    UNEXPECTED TOP-LEVEL EXCEPTION:
    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.processClass(Main.java:665)
      at com.android.dx.command.dexer.Main.processFileBytes(Main.java:634)
      at com.android.dx.command.dexer.Main.access$600(Main.java:78)
      at com.android.dx.command.dexer.Main$1.processFileBytes(Main.java:572)
      at com.android.dx.cf.direct.ClassPathOpener.processOne(ClassPathOpener.java:170)
      at com.android.dx.cf.direct.ClassPathOpener.processDirectory(ClassPathOpener.java:229)
      at com.android.dx.cf.direct.ClassPathOpener.processOne(ClassPathOpener.java:158)
      at com.android.dx.cf.direct.ClassPathOpener.processDirectory(ClassPathOpener.java:229)
      at com.android.dx.cf.direct.ClassPathOpener.processOne(ClassPathOpener.java:158)
      at com.android.dx.cf.direct.ClassPathOpener.processDirectory(ClassPathOpener.java:229)
      at com.android.dx.cf.direct.ClassPathOpener.processOne(ClassPathOpener.java:158)
      at com.android.dx.cf.direct.ClassPathOpener.processDirectory(ClassPathOpener.java:229)
      at com.android.dx.cf.direct.ClassPathOpener.processOne(ClassPathOpener.java:158)
      at com.android.dx.cf.direct.ClassPathOpener.processDirectory(ClassPathOpener.java:229)
      at com.android.dx.cf.direct.ClassPathOpener.processOne(ClassPathOpener.java:158)
      at com.android.dx.cf.direct.ClassPathOpener.process(ClassPathOpener.java:144)
      at com.android.dx.command.dexer.Main.processOne(Main.java:596)
      at com.android.dx.command.dexer.Main.processAllFiles(Main.java:498)
      at com.android.dx.command.dexer.Main.runMonoDex(Main.java:264)
      at com.android.dx.command.dexer.Main.run(Main.java:230)
      at com.android.dx.command.dexer.Main.main(Main.java:199)
      at com.android.dx.command.Main.main(Main.java:103)
    ...while parsing me/eugeniomarletti/testingtests/test/BuildConfig.class
    1 error; aborting

[Takhion]

I forgot to include my build.gradle, might be useful:

buildscript {
    repositories {
        mavenCentral()
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:0.8.+'
        classpath 'me.tatarka:gradle-retrolambda:1.2.+'
    }
}

allprojects {
    repositories {
        mavenCentral()
    }
}

apply plugin: 'android'
apply plugin: 'retrolambda'

android {
    compileSdkVersion 19
    buildToolsVersion '19.0.1'

    defaultConfig {
        minSdkVersion 14
        targetSdkVersion 19
        versionCode 1
        versionName '1.0'
    }

    compileOptions {
        sourceCompatibility JavaVersion.VERSION_1_8
        targetCompatibility JavaVersion.VERSION_1_8
    }
    buildTypes {
        release {
            runProguard false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.txt'
        }
    }
}

retrolambda {
    jdk System.getenv('JAVA8_HOME')
    oldJdk System.getenv('JAVA7_HOME')
    javaVersion JavaVersion.VERSION_1_7
}

dependencies {
    compile fileTree(dir: 'libs', include: ['*.jar'])
}

[evant]

Looks like I wasn't including test variants. Try with the latest SNAPSHOT version (instructions in the develop branch README).

[Takhion]

Now the error has become:

Execution failed for task ':SuperTestApp:patchAndroidJar'.
> Retrolambda: "/Library/Java/JavaVirtualMachines/jdk1.8.0.jdk/Contents/Home"/jre/lib/rt.jar does not exist, make sure that JAVE_HOME or retrolambda.jdk points to a valid version of java8
   You can download java8 from https://jdk8.java.net/download.html

Quotes in the middle of the path?

[evant]

Interesting, are there quotes when you echo $JAVA8_HOME?

[Takhion]

Apparently I really had quotes in there:

$ echo $JAVA8_HOME
"/Library/Java/JavaVirtualMachines/jdk1.8.0.jdk/Contents/Home"

I removed them and now it's perfect :)
What's really interesting is that it was working before switching to the SNAPSHOT version (except for tests)!

[evant]

Glad you got it working. I released 1.3.0 so you can switch to that when it syncs on maven central.

[elvizlai]

android is not support Java8 now

[evant]

@elvizlai I'm not exactly sure what you mean. If you are having trouble building, can you provide any error messages you are getting? Also, please open a new issue instead of piggy-backing off of an old closed one.

[kaushikgopal]

Are the instructions mentioned here (in the SNAPSHOT) , the same as the most current version "2.1.0". I'm facing a similar issue (#32 ).

[Takhion]

This is the (extremely) simple project that I used at the time to check retrolambda's compatibility with tests: https://github.com/Takhion/supertest. It's outdated and probably broken, plus it has some libraries that don't relate to retrolambda in any way, but it's worth giving a shot as at the time it was working perfectly!