带有Dagger和AndroidInjectors的子模块
带有Dagger和AndroidInjectors的子模块
提问于 2019-07-05 07:36:10
我已经做了一段时间前Android喷射器风格的匕首，现在我决定尝试新的方法。直到现在，我基本上是这样在AppComponent上声明的：
@Singleton
@Component(
modules = [ApplicationModule::class,
NetModule::class,
ApiModule::class,
AnalyticsModule::class,
DbModule::class,
RepositoryModule::class,
InteractorModule::class]
)
interface ApplicationComponent {
fun inject(app: MyApp)
fun plus(controllerModule: ControllerModule): ControllerComponent
}然后我会像这样注射我的Activities/Fragments/Services/Dialogs：
class MyActivity : AppCompatActivity() {
...
val component by lazy {
(application as MyApp)
.applicationComponent
.plus(
ControllerModule(this)
)
}
override fun inject() {
component.inject(this)
}
...
}基本上，我有一个带有应用程序遍历模块的顶级应用程序组件，然后是一个具有每个活动实例的活动级组件(ControllerComponent)，这是所有活动所共有的。
现在我切换到了新方法，我创建了如下所示的组件：
@Singleton
@Component(
modules = [
AndroidSupportInjectionModule::class,
AppModule::class,
NetModule::class,
ApiModule::class,
AnalyticsModule::class,
DbModule::class,
RepositoryModule::class,
InteractorModule::class
]
)
interface AppComponent : AndroidInjector<SoulpicksApp> {
@Component.Builder
interface Builder {
fun build(): AppComponent
@BindsInstance
fun application(application: SoulpicksApp): Builder
}
}让我的应用程序扩展DaggerApplication
open class MyApp : DaggerApplication() {
override fun applicationInjector(): AndroidInjector<out DaggerApplication> = DaggerAppComponent.builder().application(this).build()
}我的Activities/Fragments分别扩展了DaggerAppCompatActivty/DaggerFragment：
class MyActivity : DaggerAppCompatActivity() {
...
}我理解这应该会自动连接所有的活动依赖关系，只要Dagger被正确设置。然而，我并没有声明我的ControllerModule/Component，所以在运行我的应用程序时，我当然会得到：
e: /Users/user/dev/my-android/app/build/generated/source/kapt/devDebug/com/myapp/android/di/activity/ActivityBinder_ContributesMyActivity.java:28: error: @Subcomponent.Builder is missing setters for required modules or subcomponents: [com.myapp.android.di.controller.ControllerModule]我以前了解到，我是通过使用plus()方法并显式地注入(这正是我在这里试图避免的)在每个Activity上创建这个组件的，我现在该怎么做呢？
另外，我的应用程序中有一些BottomSheetDialogFragments和JobServiceIntents，没有相应的DaggerBottomSheedDialogFragments/DaggerJobServiceIntents可供扩展，我该如何解决这个问题呢？
ControllerModule：
@Module
class ControllerModule(val activity: androidx.fragment.app.FragmentActivity) {
@Provides
@ControllerScope
fun context(): Context = activity
@Provides
@ControllerScope
fun activity() = activity
@Provides
@ControllerScope
fun layoutInflater() = activity.layoutInflater
@Provides
@ControllerScope
fun fragmentManager(): androidx.fragment.app.FragmentManager = activity.supportFragmentManager
@Provides
@ControllerScope
fun provideNavigationController(activity: androidx.fragment.app.FragmentActivity, analyticsManager: AnalyticsCompositeManager) = NavigationController(activity, analyticsManager)
@Provides
@ControllerScope
fun providePackageUtils(activity: androidx.fragment.app.FragmentActivity) : PackageUtils = PackageUtilsImpl(activity)
}@luis_cortes应答后的更改：
封装io.soulpicks.android.di.activity
@Module
abstract class ActivityBinder {
@ControllerScope
@ContributesAndroidInjector(modules = [ControllerModule::class])
abstract fun constributesSplashActivity(): SplashActivity
@ControllerScope
@ContributesAndroidInjector(modules = [ControllerModule::class])
abstract fun contributesDashboardActivity(): DashboardActivity
....
}ControllerModule：
@Module(includes = [ViewContainerModule::class])
class ControllerModule {
@Provides
@ControllerScope
fun context(activity: DaggerAppCompatActivity): Context = activity.applicationContext
@Provides
@ControllerScope
fun layoutInflater(activity: DaggerAppCompatActivity) : LayoutInflater = activity.layoutInflater
@Provides
@ControllerScope
fun fragmentManager(activity: DaggerAppCompatActivity): FragmentManager = activity.supportFragmentManager
@Provides
@ControllerScope
fun navigationController(activity: DaggerAppCompatActivity, analyticsManager: AnalyticsCompositeManager): NavigationController = NavigationController(activity, analyticsManager)
@Provides
@ControllerScope
fun providePackageUtils(activity: DaggerAppCompatActivity): PackageUtils = PackageUtilsImpl(activity)
}错误：
e: /Users/kelmer/dev/myapp-android/app/build/tmp/kapt3/stubs/devDebug/io/myapp/android/di/application/AppComponent.java:8: error: [Dagger/MissingBinding] com.myapp.android.managers.PackageUtils cannot be provided without an @Provides-annotated method.
public abstract interface AppComponent extends dagger.android.AndroidInjector<com.myapp.android.MyApp> {
^
com.myapp.android.managers.PackageUtils is injected at
com.myapp.android.ui.invite.SendInviteViewModel(packageUtils, …)
com.myapp.android.ui.invite.SendInviteViewModel is injected at
com.myapp.android.di.viewmodel.ViewModelModule.sendInviteViewModel$app_devDebug(sendInviteViewModel)
java.util.Map<java.lang.Class<? extends androidx.lifecycle.ViewModel>,javax.inject.Provider<androidx.lifecycle.ViewModel>> is injected at
com.myapp.android.di.viewmodel.MyappViewModelFactory(viewModels)
com.myapp.android.di.viewmodel.MyappViewModelFactory is injected at
com.myapp.android.di.viewmodel.ViewModelModule.bindViewModelFactory$app_devDebug(factoryMyapp)
androidx.lifecycle.ViewModelProvider.Factory is injected at
com.myapp.android.base.BaseActivity.viewModelFactory
com.myapp.android.ui.splash.SplashActivity is injected at
dagger.android.AndroidInjector.inject(T) [com.myapp.android.di.application.AppComponent → com.myapp.android.di.activity.ActivityBinder_ConstributesSplashActivity.SplashActivitySubcomponent]
It is also requested at:
com.myapp.android.ui.dashboard.friends.contact.ContactSyncViewModel(…, packageUtils, …)
com.myapp.android.views.appchoosedialog.AppChooserViewModel(packageUtils)
The following other entry points also depend on it:
dagger.android.AndroidInjector.inject(T) [com.myapp.android.di.application.AppComponent → com.myapp.android.di.activity.ActivityBinder_ContributesDashboardActivity.DashboardActivitySubcomponent]https://github.com/kelmer44/mvvm-base
分支master是当前的实现(没有匕首-android)分支chore/dagger-rework是我的尝试。
回答 1
Stack Overflow用户
回答已采纳
发布于 2019-07-08 18:49:20
更新
我设法让示例项目对原始解决方案进行了一些非常小的调整。我已经更新了下面的答案，为后人和标记步骤是新的或已更改的粗体。
注意：在样例项目中对ControllerModule有一些非常小的必要调整，但下面的答案将最适用于站点上的其他人，所以我选择在这里省略它们。
MainActivityModule创建一个名为的文件，其中包含以下内容：
@Module
abstract class MainActivityModule {
@Binds @ControllerScope
abstract fun bindsActivity(mainActivity: MainActivity): FragmentActivity
}- 将其添加到安装在AppComponent:上的模块中
@ContributesAndroidInjector([ControllerModule::class, MainActivityModule::class])
@ControllerScope
abstract fun contributesMyActivity(): MyActivity- 将
val activity: androidx.fragment.app.FragmentActivity作为ControllerModule构造函数的属性删除 - 更改您的
@Provides方法以接受如下所示的FragmentActivity：
@Provides
@ControllerScope
fun providesContext(activity: FragmentActivity): Context = activity对于其他类，它只取决于您是否控制它们何时以及如何被实例化。如果需要，只需使用常规构造函数注入即可。
页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/56898569
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