Java I';我无法提供ViewModel
当我在Java I';我无法提供ViewModel,java,android,kotlin,dagger-2,Java,Android,Kotlin,Dagger 2,当我在@ContributesAndroidInjector(modules=[MainFragmentBuilderModule::class,LoginViewModelProviderModule::class])中包含LoginViewModelProviderModule时,我无法使用LoginViewModel模块提供LoginViewModel。但当我在ActivityBuilderModule类的@Module注释中包含它时,它就可以工作 基本应用程序组件 @Suppress("
@ContributesAndroidInjector(modules=[MainFragmentBuilderModule::class,LoginViewModelProviderModule::class])中包含LoginViewModelProviderModule时,我无法使用LoginViewModel模块提供LoginViewModel。
但当我在ActivityBuilderModule类的@Module注释中包含它时,它就可以工作
基本应用程序组件
@Suppress("unused")
@Singleton
@Component(
modules = [AndroidInjectionModule::class,
ActivityBuilderModule::class,
ViewModelFactoryModule::class]
)
interface BaseApplicationComponent : AndroidInjector<BaseApplicationClass> {
@Component.Builder
interface Builder {
@BindsInstance
fun application(application: Application): Builder
fun build(): BaseApplicationComponent
}
}
MainFragmentBuilderModule
@Module
abstract class ActivityBuilderModule {
@LoginScope
@ContributesAndroidInjector(modules = [MainFragmentBuilderModule::class, LoginViewModelProviderModule::class])
abstract fun contributeMainActivity(): MainActivity
}
@Module
abstract class MainFragmentBuilderModule {
@ContributesAndroidInjector
abstract fun contributesLoginFragment(): LoginFragment
}
@Suppress("unused")
@Module
abstract class LoginViewModelProviderModule {
@Binds
@IntoMap
@ViewModelKey(LoginViewModel::class)
abstract fun bindLoginViewModel(viewModel: LoginViewModel): ViewModel
}
@Module
abstract class ViewModelFactoryModule {
@Binds
abstract fun bindViewModelFactory(viewModelProviderFactory: ViewModelProviderFactory): ViewModelProvider.Factory
}
@Scope
@MustBeDocumented
@Retention(AnnotationRetention.RUNTIME)
annotation class LoginScope
LoginViewModelProviderModule
@Module
abstract class ActivityBuilderModule {
@LoginScope
@ContributesAndroidInjector(modules = [MainFragmentBuilderModule::class, LoginViewModelProviderModule::class])
abstract fun contributeMainActivity(): MainActivity
}
@Module
abstract class MainFragmentBuilderModule {
@ContributesAndroidInjector
abstract fun contributesLoginFragment(): LoginFragment
}
@Suppress("unused")
@Module
abstract class LoginViewModelProviderModule {
@Binds
@IntoMap
@ViewModelKey(LoginViewModel::class)
abstract fun bindLoginViewModel(viewModel: LoginViewModel): ViewModel
}
@Module
abstract class ViewModelFactoryModule {
@Binds
abstract fun bindViewModelFactory(viewModelProviderFactory: ViewModelProviderFactory): ViewModelProvider.Factory
}
@Scope
@MustBeDocumented
@Retention(AnnotationRetention.RUNTIME)
annotation class LoginScope
ViewModelFactoryModule
@Module
abstract class ActivityBuilderModule {
@LoginScope
@ContributesAndroidInjector(modules = [MainFragmentBuilderModule::class, LoginViewModelProviderModule::class])
abstract fun contributeMainActivity(): MainActivity
}
@Module
abstract class MainFragmentBuilderModule {
@ContributesAndroidInjector
abstract fun contributesLoginFragment(): LoginFragment
}
@Suppress("unused")
@Module
abstract class LoginViewModelProviderModule {
@Binds
@IntoMap
@ViewModelKey(LoginViewModel::class)
abstract fun bindLoginViewModel(viewModel: LoginViewModel): ViewModel
}
@Module
abstract class ViewModelFactoryModule {
@Binds
abstract fun bindViewModelFactory(viewModelProviderFactory: ViewModelProviderFactory): ViewModelProvider.Factory
}
@Scope
@MustBeDocumented
@Retention(AnnotationRetention.RUNTIME)
annotation class LoginScope
ViewModelProviderFactory
@Singleton
class ViewModelProviderFactory @Inject constructor(
private val creators: Map<Class<out ViewModel>, @JvmSuppressWildcards Provider<ViewModel>>
) : ViewModelProvider.Factory {
override fun <T : ViewModel> create(modelClass: Class<T>): T {
val creator = creators[modelClass] ?: creators.entries.firstOrNull {
modelClass.isAssignableFrom(it.key)
}?.value ?: throw IllegalArgumentException("unknown model class $modelClass") as Throwable
try {
@Suppress("UNCHECKED_CAST")
return creator.get() as T
} catch (e: Exception) {
throw RuntimeException(e)
}
}
}
@MustBeDocumented
@Target(
AnnotationTarget.FUNCTION,
AnnotationTarget.PROPERTY_GETTER,
AnnotationTarget.PROPERTY_SETTER
)
@Retention(AnnotationRetention.RUNTIME)
@MapKey
annotation class ViewModelKey(val value: KClass<out ViewModel>)
ViewModelKey
@Singleton
class ViewModelProviderFactory @Inject constructor(
private val creators: Map<Class<out ViewModel>, @JvmSuppressWildcards Provider<ViewModel>>
) : ViewModelProvider.Factory {
override fun <T : ViewModel> create(modelClass: Class<T>): T {
val creator = creators[modelClass] ?: creators.entries.firstOrNull {
modelClass.isAssignableFrom(it.key)
}?.value ?: throw IllegalArgumentException("unknown model class $modelClass") as Throwable
try {
@Suppress("UNCHECKED_CAST")
return creator.get() as T
} catch (e: Exception) {
throw RuntimeException(e)
}
}
}
@MustBeDocumented
@Target(
AnnotationTarget.FUNCTION,
AnnotationTarget.PROPERTY_GETTER,
AnnotationTarget.PROPERTY_SETTER
)
@Retention(AnnotationRetention.RUNTIME)
@MapKey
annotation class ViewModelKey(val value: KClass<out ViewModel>)
@必须记录
@目标(
AnnotationTarget.FUNCTION,
AnnotationTarget.PROPERTY\u GETTER,
AnnotationTarget.PROPERTY\u SETTER
)
@保留(AnnotationRetention.RUNTIME)
@地图键
注释类ViewModelKey(val值:KClass)
这就是我看到的错误:
@Suppress("unused")
@Singleton
@Component(
modules = [AndroidInjectionModule::class,
ActivityBuilderModule::class,
ViewModelFactoryModule::class,
ViewModelModule::class]
)
interface BaseApplicationComponent : AndroidInjector<BaseApplicationClass> {
@Component.Builder
interface Builder {
@BindsInstance
fun application(application: Application): Builder
fun build(): BaseApplicationComponent
}
}
@Suppress("unused")
@Module
abstract class ViewModelProviderModule {
@Binds
@IntoMap
@ViewModelKey(LoginViewModel::class)
abstract fun bindLoginViewModel(viewModel: LoginViewModel): ViewModel
//other viewmodels in application
@Binds
abstract fun bindViewModelFactory(viewModelProviderFactory:ViewModelProviderFactory): ViewModelProvider.Factory
}
@Module
class MainModule {
@MainActivityScope
@Provides
fun provideViewModel(mainActivity: MainActivity, viewModelFactory: ViewModelProviderFactory) =
ViewModelProviders.of(mainActivity, viewModelFactory).get(LoginViewModel::class.java)
}
class LoginViewModel @Inject constructor(
) : ViewModel() {
}
错误:[Dagger/MissingBinding]java.util.Map,javax.inject.Provider>如果没有@Provides注释方法,则无法提供。
基于公共抽象接口的ApplicationComponent扩展了dagger.android.AndroidJector{
^
java.util.Map、javax.inject.Provider>在
com.example.mydemoapplication.viewmodel\u factory.ViewModelProviderFactory(创建者)
com.example.mydemoapplication.viewmodel_factory.ViewModelProviderFactory在
com.example.mydemoapplication.LoginFragment.viewModelProviderFactory
com.example.mydemoapplication.LoginFragment在
dagger.android.Androidjector.inject(T)[com.example.mydemoapplication.dagger.BaseApplicationComponent?com.example.mydemoapplication.dagger.ActivityBuilderModule_ContributeMainActivity.MainActivitySubcomponent?com.example.mydemoapplication.dagger.MainFragmentBuilderModule_contributeSLoginFragmentSubComponent]您只能在应用程序中创建绑定所有viewmodel的模块。您可以在我的示例应用程序中看到详细信息: 基本应用程序组件:
@Suppress("unused")
@Singleton
@Component(
modules = [AndroidInjectionModule::class,
ActivityBuilderModule::class,
ViewModelFactoryModule::class,
ViewModelModule::class]
)
interface BaseApplicationComponent : AndroidInjector<BaseApplicationClass> {
@Component.Builder
interface Builder {
@BindsInstance
fun application(application: Application): Builder
fun build(): BaseApplicationComponent
}
}
@Suppress("unused")
@Module
abstract class ViewModelProviderModule {
@Binds
@IntoMap
@ViewModelKey(LoginViewModel::class)
abstract fun bindLoginViewModel(viewModel: LoginViewModel): ViewModel
//other viewmodels in application
@Binds
abstract fun bindViewModelFactory(viewModelProviderFactory:ViewModelProviderFactory): ViewModelProvider.Factory
}
@Module
class MainModule {
@MainActivityScope
@Provides
fun provideViewModel(mainActivity: MainActivity, viewModelFactory: ViewModelProviderFactory) =
ViewModelProviders.of(mainActivity, viewModelFactory).get(LoginViewModel::class.java)
}
class LoginViewModel @Inject constructor(
) : ViewModel() {
}
main模块:
@Suppress("unused")
@Singleton
@Component(
modules = [AndroidInjectionModule::class,
ActivityBuilderModule::class,
ViewModelFactoryModule::class,
ViewModelModule::class]
)
interface BaseApplicationComponent : AndroidInjector<BaseApplicationClass> {
@Component.Builder
interface Builder {
@BindsInstance
fun application(application: Application): Builder
fun build(): BaseApplicationComponent
}
}
@Suppress("unused")
@Module
abstract class ViewModelProviderModule {
@Binds
@IntoMap
@ViewModelKey(LoginViewModel::class)
abstract fun bindLoginViewModel(viewModel: LoginViewModel): ViewModel
//other viewmodels in application
@Binds
abstract fun bindViewModelFactory(viewModelProviderFactory:ViewModelProviderFactory): ViewModelProvider.Factory
}
@Module
class MainModule {
@MainActivityScope
@Provides
fun provideViewModel(mainActivity: MainActivity, viewModelFactory: ViewModelProviderFactory) =
ViewModelProviders.of(mainActivity, viewModelFactory).get(LoginViewModel::class.java)
}
class LoginViewModel @Inject constructor(
) : ViewModel() {
}
登录视图模型:
@Suppress("unused")
@Singleton
@Component(
modules = [AndroidInjectionModule::class,
ActivityBuilderModule::class,
ViewModelFactoryModule::class,
ViewModelModule::class]
)
interface BaseApplicationComponent : AndroidInjector<BaseApplicationClass> {
@Component.Builder
interface Builder {
@BindsInstance
fun application(application: Application): Builder
fun build(): BaseApplicationComponent
}
}
@Suppress("unused")
@Module
abstract class ViewModelProviderModule {
@Binds
@IntoMap
@ViewModelKey(LoginViewModel::class)
abstract fun bindLoginViewModel(viewModel: LoginViewModel): ViewModel
//other viewmodels in application
@Binds
abstract fun bindViewModelFactory(viewModelProviderFactory:ViewModelProviderFactory): ViewModelProvider.Factory
}
@Module
class MainModule {
@MainActivityScope
@Provides
fun provideViewModel(mainActivity: MainActivity, viewModelFactory: ViewModelProviderFactory) =
ViewModelProviders.of(mainActivity, viewModelFactory).get(LoginViewModel::class.java)
}
class LoginViewModel @Inject constructor(
) : ViewModel() {
}
更新-
ViewModelProviderFactory
不应为单例,删除此选项可修复此问题