java - Kotlin + Dagger 2 : Dagger* files won't generate

Question

我第一次开始同时使用 Kotlin 和 Dagger 2。我假设一切都与 Java 中的相同，但显然不完全相同。 Dagger 不会为我生成 Dagger* 文件。这是我的代码:

组件:

@PerActivity
@Subcomponent(modules = arrayOf(ApplicationModule::class))
interface ActivityComponent {
    fun inject(app: OneAccountApplication)
}

---

@Singleton
@Component(modules = arrayOf(ApplicationModule::class))
interface ApplicationComponent {

fun inject(syncService: SyncService)
@ApplicationContext fun context(): Context
fun application(): Application
fun ribotsService(): OneAccountService
fun preferencesHelper(): PreferencesHelper
fun databaseHelper(): DatabaseHelper
fun dataManager(): DataManager
}

---

@ConfigPersistent
@Component(dependencies = arrayOf(ApplicationComponent::class))
interface ConfigPersistentComponent {
    fun activityComponent(activityModule: ActivityModule): ActivityComponent
}

---

模块:

@Module
class ActivityModule(private val mActivity: Activity) {

    @Provides
    internal fun provideActivity() = mActivity

    @Provides
    @ActivityContext
    internal fun providesContext() = mActivity
}

---

@Module
class ApplicationModule(val mApplication: Application) {

    @Provides @Singleton
    internal fun provideApplication() = mApplication

    @Provides
    @ApplicationContext
    internal fun provideContext() = mApplication

    @Provides
    @Singleton
    internal fun provideOneAccountService() = OneAccountService.Creator.newOneAccountService()
}

---

作用域注解:

@Qualifier
@Retention(AnnotationRetention.RUNTIME)
annotation class ActivityContext

---

@Qualifier
@Retention(AnnotationRetention.RUNTIME)
annotation class ApplicationContext

---

@Scope
@Retention(AnnotationRetention.RUNTIME)
annotation class ConfigPersistent

---

@Scope
@Retention(AnnotationRetention.RUNTIME)
annotation class PerActivity

---

这基本上是我在 Java 代码中成功使用的整个 DI 系统。但是对于 Kotlin，由于某种原因它不起作用。我还添加了:apply plugin: 'kotlin-kapt' 到 gradle.build 就像:

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

在依赖项中我有:

dependencies {

    final DAGGER_VERSION = '2.8'
    def daggerCompiler = "com.google.dagger:dagger-compiler:$DAGGER_VERSION"
    annotationProcessor daggerCompiler
    testAnnotationProcessor daggerCompiler
    androidTestAnnotationProcessor daggerCompiler
    compile  "com.google.dagger:dagger:$DAGGER_VERSION"
}
kapt {
    generateStubs = true
}

基本上就是这个https://github.com/ribot/android-boilerplate转化为 Kotlin。

Answer 1

Kotlin 使用 kapt 而不是 Android 插件中的 annotationProcessor。

您需要在 build.gradle 文件中包含并使用以下内容:

kapt {
    generateStubs = true
}
dependencies {
    // ...
    kapt daggerCompiler
}

更详细的说明也可以在这里找到:Dagger and Kotlin