找不到带匕首2的符号视图模型

我正在创建一个新的Android项目,并添加了Dagger2,但失败了,错误与 androidx 图书馆。

在Android Studio中使用模板后,我添加了几行, kotlin-kapt 以及对匕首2的依赖。

apply plugin: 'com.android.application'
apply plugin: 'kotlin-android'
apply plugin: 'kotlin-android-extensions'
apply plugin: 'kotlin-kapt'

android {
    compileSdkVersion 28
    defaultConfig {
        applicationId "com.xxxx.yyyy"
        minSdkVersion 16
        targetSdkVersion 28
        versionCode 1
        versionName "1.0"
        testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
    }

    androidExtensions {
        experimental = true
    }
    kapt {
        generateStubs = true
    }
}



dependencies {
    implementation fileTree(dir: 'libs', include: ['*.jar'])
    implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
    implementation 'androidx.appcompat:appcompat:1.0.0-alpha1'
    implementation 'androidx.constraintlayout:constraintlayout:1.1.0'
    implementation 'androidx.lifecycle:lifecycle-extensions:2.0.0-alpha1'


    implementation 'com.google.android.material:material:1.0.0-alpha1'

    // Image Loading
    implementation 'com.github.bumptech.glide:glide:4.6.1'
    annotationProcessor 'com.github.bumptech.glide:compiler:4.6.1'

    // Dagger
    implementation 'com.google.dagger:dagger-android:2.15'
    kapt 'com.google.dagger:dagger-android-processor:2.15'

    // RxJava
    implementation 'io.reactivex.rxjava2:rxandroid:2.0.1'
    implementation 'io.reactivex.rxjava2:rxjava:2.1.3'

    // Retrofit
    implementation 'com.squareup.retrofit2:retrofit:2.3.0'
    implementation 'com.squareup.retrofit2:converter-gson:2.3.0'
    implementation 'com.squareup.retrofit2:adapter-rxjava2:2.2.0'
    implementation 'com.squareup.okhttp3:okhttp:3.10.0'
    implementation 'com.squareup.okhttp3:logging-interceptor:3.9.0'

    // Navigation
    implementation 'android.arch.navigation:navigation-fragment-ktx:1.0.0-alpha01'
    implementation 'android.arch.navigation:navigation-ui-ktx:1.0.0-alpha01'

    // Pretty Logger
    implementation 'com.orhanobut:logger:1.15'


    testImplementation 'junit:junit:4.12'
    androidTestImplementation 'androidx.test:runner:1.1.0-alpha1'
    androidTestImplementation 'androidx.test.espresso:espresso-core:3.1.0-alpha1'
}

当尝试构建应用程序时,它失败,并出现以下错误。

error: cannot find symbol
public final class MainActivityViewModel extends android.arch.lifecycle.ViewModel {
                                                                       ^
    symbol:   class ViewModel
    location: package android.arch.lifecycle


error: cannot find symbol
private final androidx.lifecycle.MediatorLiveData
                                ^
    symbol:   class MediatorLiveData
    location: package androidx.lifecycle


error: cannot find symbol
private androidx.navigation.NavController navController;
                           ^
    symbol:   class NavController
    location: package androidx.navigation


 ...

我试过了 仙女座 图书馆和旧图书馆都失败了。如果我移除了匕首2的依赖,它将建立并运行良好。

我目前正在使用Android Studio 3.2 Canary 17。

知道怎么回事吗?

谢谢。