java.lang.NoClassDefFoundError: android.support.test.espresso.matcher.ViewMatchers

[X_Jay_X]

Hi, using the following line of code 

• onView(withId(R.id.my_Button)).perform(ViewActions.click());
  

I have all the imports I need, no errors there, but when I launch the app and the line above is hit I get the following error:

• java.lang.NoClassDefFoundError: android.support.test.espresso.matcher.ViewMatchers$12   (Set up is done and project builds properly, Why of this class not found error?)
  

Our app uses multiple modules. Any feedback is appreciated. 

[Stephan Linzner]

Can you please post you build.gradle file here?

[X_Jay_X]

Hi,  I actually got passed this as it was an build.gradle set up.  However, now I run into the following error: 

java.lang.IncompatibleClassChangeError: Class 'android.widget.TextView' does not implement interface 'org.hamcrest.Description' in call to 'org.hamcrest.Description org.hamcrest.Description.appendText(java.lang.String)' (declaration of 'java.lang.reflect.ArtMethod' appears in /system/framework/core-libart.jar)

When I try to use,  onView(withText('sampletest'))

[X_Jay_X]

Gradle File looks like this:

apply plugin: 'com.android.application'

android {

    compileSdkVersion rootProject.ext.compileSdkVersion

    buildToolsVersion rootProject.ext.buildToolsVersion

    enforceUniquePackageName false

    defaultConfig {

        applicationId "com.app.main"

        minSdkVersion 15

        // targetSdkVersion MUST be 21 since 22 causes crash AF-4259 one some devices.

        targetSdkVersion 21

        multiDexEnabled true

        testApplicationId "com.app.test"

        //testInstrumentationRunner "com.cheerfulinc.app.tests.FGInstrumentationTestRunner"

        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"

    }

    dexOptions {

        incremental true

        javaMaxHeapSize "4g"

        preDexLibraries = false

    }

    compileOptions {

        sourceCompatibility JavaVersion.VERSION_1_7

        targetCompatibility JavaVersion.VERSION_1_7

    }

    packagingOptions {

        exclude 'META-INF/LICENSE.txt'

        exclude 'LICENSE.txt'

        exclude 'META-INF/LICENSE'

        exclude 'META-INF/NOTICE'

        exclude 'META-INF/DEPENDENCIES'

    }

    signingConfigs {

        debug {

            storeFile file("../debug.keystore")

        }

        release {

            storeFile file("keystore.ks")

            storePassword "app"

            keyAlias "app"

            keyPassword "app"

        }

    }

    sourceSets {

        main {

            manifest.srcFile 'AndroidManifest.xml'

            java.srcDirs = ['src', '../hockeyapp/src', 'src/main/java', 'src/main/androidTest', 'src/main/java/', 'androidTest/java']

            res.srcDirs = ['res']

            jniLibs.srcDirs = ['../hockeyapp/libs']

            assets.srcDirs = ['assets']

            jniLibs.srcDirs = ['../app-renderer/renderer/libs', '../hockeyapp/libs']

        }

        androidTest {

            manifest.srcFile '../app/AndroidManifest.xml'

            java.srcDirs = ['../app/src', '../app-automation/src']

            res.srcDirs = ['../app/res', '../app-automation/res']

            assets.srcDirs = ['../app/assets', '../app-automation/assets']

        }

    }

    lintOptions {

        checkReleaseBuilds false

        abortOnError false

    }

    productFlavors {

        x86 {}

        armv7 {}

    }

}

dependencies {

    // support libraries

    compile 'com.android.support:appcompat-v7:22.2.0'

    compile 'com.android.support:cardview-v7:22.2.0'

    compile 'com.android.support:recyclerview-v7:22.2.0'

    compile 'com.android.support:design:22.2.1'

    // App dependencies for espresso

    compile 'org.hamcrest:hamcrest-library:1.3'

    compile 'com.android.support:support-annotations:23.0.1'

    compile 'com.google.guava:guava:18.0'

    androidTestCompile 'org.hamcrest:hamcrest-library:1.3'

    androidTestCompile('com.android.support:multidex-instrumentation:1.0.0') {

        // multidex is already a compile dependency.

        // https://code.google.com/p/android/issues/detail?id=82647

        exclude group: 'com.android.support', module: 'multidex'

    }

    androidTestCompile 'junit:junit:4.12'

    // test deps

    androidTestCompile files('../app/libs/dexmaker-1.1.jar')

    androidTestCompile files('../app/libs/dexmaker-mockito-1.1.jar')

    androidTestCompile files('../app/libs/mockito-all-1.9.5.jar')

    androidTestCompile files('../app-automation/libs/android-junit-report-1.5.8.jar')

    androidTestCompile files('../app-automation/libs/commons-lang3-3.4.jar')

    androidTestCompile files('../app-automation/libs/jsch-0.1.51.jar')

    androidTestCompile files('../app-automation/libs/robotium-solo-5.3.1.jar')

    androidTestCompile 'com.android.support.test:runner:0.4'

    androidTestCompile 'com.android.support.test:rules:0.4'

    androidTestCompile 'com.android.support.test.espresso:espresso-core:2.2'

    // add this for intent mocking support

    androidTestCompile 'com.android.support.test.espresso:espresso-intents:2.2'

    // add this for webview testing support

    androidTestCompile 'com.android.support.test.espresso:espresso-web:2.2'

}

[vnsq...@gmail.com]

Hi X_Jay_X,

Could you please post the work around on build.gradle setup for "java.lang.NoClassDefFoundError: android.support.test.espresso.matcher.ViewMatchers$12" issue?

I got the same issue and also guess the error come from gradle because the project build successfully but only espresso test modules stuck at it.

Thanks