java – Android数据绑定测试在模块NoClassDefFoundError中失败

首先让我讲述项目结构如何配置.

project
      | app
           -MainLauncherActivity
      | myLibrary
            -CommonModuleActivity

我创建了一个新项目,之后添加了一个新模块“myLibrary”.

主“app”取决于“myLibrary”模块.我在“myLibrary”中添加了一个活动,它支持数据绑定.我在点击按钮时从主“app”活动调用了模块特定活动.它只是工作,能够运行应用程序.

但是,当我为模块活动添加测试用例时,获得以下错误.

AndroidStudio：2.3

Gradle build tools version 2.3.0 -->
Error:java.lang.NoClassDefFoundError: android/databinding/DataBinderMapper


Gradle build tools version 2.2.3 -->
Error:java.lang.NoClassDefFoundError: android/databinding/ViewDataBinding

PROJECT IDE SCREENSHOT

项目根gradle文件：

// Top-level build file where you can add configuration options common to all sub-projects/modules.

buildscript {
    repositories {
        jcenter()
    }
    dependencies {
        //classpath 'com.android.tools.build:gradle:2.3.0'
        classpath 'com.android.tools.build:gradle:2.2.3'

        // NOTE: Do not place your application dependencies here; they belong
        // in the individual module build.gradle files
    }
}

allprojects {
    repositories {
        jcenter()
    }
}

task clean(type: Delete) {
    delete rootProject.buildDir
}

下面是“app”build.gradle：

apply plugin: 'com.android.application'

android {
    compileSdkVersion 25
    buildToolsVersion "25.0.2"
    defaultConfig {
        applicationId "com.example.bindingtest"
        minSdkVersion 21
        targetSdkVersion 25
        versionCode 1
        versionName "1.0"
        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
    }

    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'),'proguard-rules.pro'
        }
    }

    dataBinding {
        enabled true
    }
}

dependencies {
    compile 'com.android.support:appcompat-v7:25.1.0'
    //compile 'com.android.support.constraint:constraint-layout:1.0.0-beta4'
    testCompile 'junit:junit:4.12'
    compile project(':mylibrary')
}

在myLibrary build.gradle下面：

apply plugin: 'com.android.library'

android {
    compileSdkVersion 25
    buildToolsVersion "25.0.2"

    defaultConfig {
        minSdkVersion 21
        targetSdkVersion 25
        versionCode 1
        versionName "1.0"
        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"

    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'),'proguard-rules.pro'
        }
    }
    dataBinding {
        enabled true
    }
}

dependencies {
    compile fileTree(dir: 'libs',include: ['*.jar'])
    androidTestCompile('com.android.support.test.espresso:espresso-core:2.2.2',{
        exclude group: 'com.android.support',module: 'support-annotations'
    })
    compile 'com.android.support:appcompat-v7:25.1.0'
    testCompile 'junit:junit:4.12'
    testCompile "org.mockito:mockito-core:1.10.19"
}

LibraryActivity：

public class MyLibraryActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        ActivityMyLibraryBinding binding = DataBindingUtil.setContentView(this,R.layout.activity_my_library);
        //set data to binding
    }
}

相应的测试用例可以在附带的截图中找到.

有人可以告诉我,我在这里做错了什么来测试它.

APP工作正常,只有单位测试失败！