Exception in thread “main” java.lang.NoClassDefFoundError: junit/textui/ResultPrinter

Question

I\'m trying to compile my Android project in Android Studio 0.3.0. Today I get the following error:

Exception in thread \"main\" java.lang.NoClassDefFoundErr         


        

Answer 1

For standard JUnit tests, you are missing the JUnit library, try adding this in build.gradle:

dependencies {
    ...
    testCompile 'junit:junit:4.12'
    ...
}

And make sure you are putting the tests in the "test" directory parallell to the "main" package (instrumentation tests goes into "androidTest", but that is different setup).

Answer 2

All the answers are good-

Make sure you have sourceSets have the test directory registered.

android{
    ...

    defaultConfig {
         ...
         testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
    }


    sourceSets {
        androidTest {
            java.srcDirs = ['src/androidTest/java']
        }
    }
}

dependencies{
    ... 
    androidTestCompile 'junit:junit:4.12'
    androidTestCompile 'com.android.support.test:runner:0.5'
}

Answer 3

I've twice had this issue after changing some build.gradle plugins and dependencies around.

Simply turning Android Studio off and on again fixed it for me (versions 2.1.2 and 2.2).

Answer 4

Finally found it. It's in the Run/Debug Configurations dialog. Disabled JUnit and it compiles again.

Answer 5

In my Run/Debug Configurations I had MyTest under AndroidTests and under JUnitTests. The MyTest under AndroidTests was configured correctly, but I still got 'NoClassDefFoundError: junit/textui/ResultPrinter' error. Clicked on MyTest under JUnit and pressed '-' in upper left. This allowed MyTest to run through the device got rid of error.

Answer 6

Just putting the solution which worked for me, this should be tried if you are setting up the environment for first time:

For windows: 1) in the environment variables add a new "system variables" ANDROID_SDK_HOME=D:\Program Files\android-sdk-windows (select your home directory of android sdk )

2) modify system variables Path, add "%Android_SDK_HOME%\tools;"