android - Espresso 2.2.1 exception :app:transformClassesWithDexForDebugAndroidTest -

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in app want espresso in order test ui. however,when try run project,i message:

  error:execution failed task       ':app:transformclasseswithdexfordebugandroidtest'.   > com.android.build.api.transform.transformexception:      com.android.ide.common.process.processexception:       java.util.concurrent.executionexception:    com.android.ide.common.process.processexception:    org.gradle.process.internal.execexception: process 'command 'c:\program    files\java\jdk1.8.0_45\bin\java.exe'' finished non-zero exit value 2

this gradle setup:

apply plugin: 'com.android.application'  android { compilesdkversion 24 buildtoolsversion "24.0.0"  defaultconfig {     applicationid "theo.testing.androidespresso"     minsdkversion 18     targetsdkversion 24     versioncode 1     versionname "1.0" } buildtypes {     release {         minifyenabled false         proguardfiles getdefaultproguardfile('proguard-android.txt'), 'proguard-rules.pro'     } } }   dependencies {   compile filetree(dir: 'libs', include: ['*.jar'])   testcompile 'junit:junit:4.12'   androidtestcompile 'com.android.support:support-annotations:24.2.0'    compile 'com.android.support:appcompat-v7:24.2.0'   androidtestcompile('com.android.support.test.espresso:espresso-   core:2.2.1')        {     exclude group: 'javax.inject' }    androidtestcompile 'com.android.support.test:testing-support-lib:0.1'   }

any ideas why happening?

thanks.

i'm pretty sure, it's third post , has same problem. you're trying use dependencies don't need have during test.

change build.gradle dependencies section to:

dependencies {   compile filetree(dir: 'libs', include: ['*.jar'])  compile 'com.android.support:appcompat-v7:24.2.0'    testcompile 'junit:junit:4.12'  androidtestcompile 'com.android.support.test:runner:0.5' androidtestcompile 'com.android.support:support-annotations:24.2.0' androidtestcompile 'com.android.support.test.espresso:espresso-core:2.2.2' androidtestcompile('com.android.support.test.espresso:espresso-contrib:2.2.1') {     // necessary avoid version conflicts     exclude group: 'com.android.support', module: 'appcompat'     exclude group: 'com.android.support', module: 'support-v4'     exclude group: 'com.android.support', module: 'support-annotations' }  }

google's official android testing support library site enough start android testing.

see espresso secton

hope help


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