Espresso UI 测试无法识别 onView()。

我整天都在使用Espresso设置Junit4仪器测试，但就是无法完成最后一步。无论我做什么，它都无法识别onView()方法。我尝试了多个SDK/support-lib版本，但目前还没有进展。我已经浏览了所有的谷歌设置指南和许多stackoverflow帖子，现在只能寄希望于这里了。

Gradle版本：com.android.tools.build:gradle:1.5.0

Gradle文件：

apply plugin: 'com.android.application'
apply plugin: 'com.google.gms.google-services'
android {
    compileSdkVersion 23
    buildToolsVersion "23.0.2"
    useLibrary  'org.apache.http.legacy'
    defaultConfig {
        applicationId "lv.my.android"
        minSdkVersion 9
        targetSdkVersion 22
        testApplicationId "lv.my.android.tests"
        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
    }
    packagingOptions {
        exclude 'LICENSE.txt'
        exclude 'META-INF/DEPENDENCIES'
        exclude 'META-INF/LICENSE'
        exclude 'META-INF/NOTICE'
    }
    compileOptions {
        sourceCompatibility = 'VERSION_1_7'
        targetCompatibility = 'VERSION_1_7'
    }
    signingConfigs {
        beta {
            storeFile file("beta.keystore")
            storePassword "betabuild"
            keyAlias "key"
            keyPassword "betabuild"
        }
        release
    }
    buildTypes {
        debug {
            debuggable true
            applicationIdSuffix '.debug'
            versionNameSuffix '-DEV'
            minifyEnabled false
        }
        beta {
            debuggable true
            applicationIdSuffix '.beta'
            versionNameSuffix '-BETA'
            signingConfig signingConfigs.beta
            minifyEnabled false
        }
        release {
            minifyEnabled false
        }
    }
}
dependencies {
    compile files('src/main/libs/guice-3.0-no_aop.jar')
    compile files('src/main/libs/javax.inject-1.jar')
    compile files('src/main/libs/roboguice-2.0.jar')
    compile files('src/main/libs/junit-4.11.jar')
    compile files('src/main/libs/hamcrest-core-1.3.jar')
    compile files('src/main/libs/GeoLib.jar')
    compile files('src/main/libs/GeoPolygons.jar')
    compile files('src/main/libs/universal-image-loader-1.9.4.jar')
    compile files('src/main/libs/javax.annotation-3.2-b06-sources.jar')
    compile 'uk.co.chrisjenx:calligraphy:2.1.0'
    compile 'com.squareup:otto:1.3.5'
    compile 'com.google.android.gms:play-services:6.5.87'
    compile 'com.android.support:support-annotations:23.0.1'
    compile 'com.android.support:appcompat-v7:23.0.1'
    compile 'com.android.support:support-v4:23.0.1'
    compile 'com.android.support:palette-v7:23.0.1'
    compile 'com.google.code.findbugs:jsr305:2.0.1'
    compile 'com.nineoldandroids:library:2.4.0'
    compile 'pl.charmas.android:android-reactive-location:0.4@aar'
    compile 'io.reactivex:rxjava:1.0.3'
    compile files('src/main/libs/FlurryAnalytics-6.1.0.jar')
    compile 'com.github.castorflex.smoothprogressbar:library:1.1.0'
    androidTestCompile 'com.android.support.test:testing-support-lib:0.1'
    androidTestCompile'com.android.support.test:runner:0.4.1'
    // 设置此依赖项以使用JUnit 4规则
    androidTestCompile'com.android.support.test:rules:0.4'
    // 设置此依赖项以构建和运行Espresso测试
    androidTestCompile'com.android.support.test.espresso:espresso-core:2.2.1'
    testCompile 'junit:junit:4.12'
    testCompile "org.mockito:mockito-core:1.9.5"
}

我的测试（位于src/androidTest/java/lv/my/test）

package lv.my.test;
import android.support.test.rule.ActivityTestRule;
import android.support.test.runner.AndroidJUnit4;
import android.test.suitebuilder.annotation.LargeTest;
import lv.my.android.activities.LoginActivity;
import org.junit.Before;
import org.junit.Rule;
import org.junit.Test;
import org.junit.runner.RunWith;
@RunWith(AndroidJUnit4.class)
@LargeTest
public class LoginActivityTest {
    private String mStringToBetyped;
    @Rule
    public ActivityTestRule mActivityRule = new ActivityTestRule<>(LoginActivity.class);
    @Before
    public void initValidString() {
    }
    @Test
    public void changeText_sameActivity() {
//        这里无法识别onView
    }
}

附：我使用了roboguice，是这个引起了问题吗？