匕首2.11之后,我们可以用一个@Binds注释和标记我们的模块为抽象在这种情况下,这是比具体更有效。
如果我的模块有两种@Provides和@Binds方法,我有两个选择:
第二个选项工作正常,在Java和科特林但第一个选项在Java中工作正常,但我不知道如何实现在科特林相同。如果我移动@Provides方法伴侣反对它扔Error:(30, 1) error: @Provides methods can only be present within a @Module or @ProducerModule
。在科特林如何才能做到这一点。
第二个选项:(工作)
ApplicationModule.kt
@Module(includes = [ApplicationModule.Declarations::class])
abstract class ApplicationModule {
@Module
internal interface Declarations {
@Binds
fun bindContext(application: Application): Context
}
@Provides
@Singleton
fun provideMvpStarterService(): MvpStarterService {
return MvpStarterServiceFactory.makeStarterService()
}
}
第一个选项:(不工作)
ApplicationModule.kt
@Module
abstract class ApplicationModule {
//expose Application as an injectable context
@Binds
internal abstract fun bindContext(application: Application): Context
companion object {
@JvmStatic
@Provides
@Singleton
fun provideMvpStarterService(): MvpStarterService {
return MvpStarterServiceFactory.makeStarterService()
}
}
}
对于第一种选择生成的Java文件:
@kotlin.Metadata(mv = {1, 1, 9}, bv = {1, 0, 2}, k = 1, d1 = {"\u0000\u001a\n\u0002\u0018\u0002\n\u0002\u0010\u0000\n\u0002\b\u0002\n\u0002\u0018\u0002\n\u0000\n\u0002\u0018\u0002\n\u0002\b\u0003\b\'\u0018\u0000 \b2\u00020\u0001:\u0001\bB\u0005\u00a2\u0006\u0002\u0010\u0002J\u0015\u0010\u0003\u001a\u00020\u00042\u0006\u0010\u0005\u001a\u00020\u0006H!\u00a2\u0006\u0002\b\u0007\u00a8\u0006\t"}, d2 = {"Lio/mywebsie/di/ApplicationModule;", "", "()V", "bindContext", "Landroid/content/Context;", "application", "Landroid/app/Application;", "bindContext$app_debug", "Companion", "app_debug"})
@dagger.Module()
public abstract class ApplicationModule {
public static final io.mywebsie.di.ApplicationModule.Companion Companion = null;
@org.jetbrains.annotations.NotNull()
@dagger.Binds()
public abstract android.content.Context bindContext$app_debug(@org.jetbrains.annotations.NotNull()
android.app.Application application);
public ApplicationModule() {
super();
}
@org.jetbrains.annotations.NotNull()
@javax.inject.Singleton()
@dagger.Provides()
public static final io.mywebsie.data.remote.MvpStarterService provideMvpStarterService() {
return null;
}
@kotlin.Metadata(mv = {1, 1, 9}, bv = {1, 0, 2}, k = 1, d1 = {"\u0000\u0012\n\u0002\u0018\u0002\n\u0002\u0010\u0000\n\u0002\b\u0002\n\u0002\u0018\u0002\n\u0000\b\u0086\u0003\u0018\u00002\u00020\u0001B\u0007\b\u0002\u00a2\u0006\u0002\u0010\u0002J\b\u0010\u0003\u001a\u00020\u0004H\u0007\u00a8\u0006\u0005"}, d2 = {"Lio/mywebsie/di/ApplicationModule$Companion;", "", "()V", "provideMvpStarterService", "Lio/mywebsie/data/remote/MvpStarterService;", "app_debug"})
public static final class Companion {
@org.jetbrains.annotations.NotNull()
@javax.inject.Singleton()
@dagger.Provides()
public final io.mywebsie.data.remote.MvpStarterService provideMvpStarterService() {
return null;
}
private Companion() {
super();
}
}
}
更新:
感谢@大卫Medenjak您在评论中提供的link使一切清楚我在两个途径来实现第一个选项。
更新的代码:
第一个选项:(工作)
ApplicationModule.kt
@Module(includes = [ApplicationModule.AModule::class])
abstract class ApplicationModule {
@Binds
abstract fun bindContext(application: Application): Context
@Module
object AModule {
@JvmStatic
@Provides
@Singleton
fun provideMvpStarterService(): MvpStarterService {
return MvpStarterServiceFactory.makeStarterService()
}
}
}
要么
@Module
abstract class ApplicationModule {
@Binds
abstract fun bindContext(application: Application): Context
@Module
companion object {
@Provides
@Singleton
fun provideMvpStarterService(): MvpStarterService {
return MvpStarterServiceFactory.makeStarterService()
}
}
}
这两个工作得很好,但由于某种原因,第一个选项看起来并不吸引我,所以我更喜欢第二个选项。
下面是一个例子代码来演示如何使用Binds
和Provides
单一Kotlin class
注解的方法:
@Module
abstract class MessagesPresentationModule {
@Module
companion object {
const val MESSAGES = 0x00
@JvmStatic
@Provides
fun provideRecyclerAdapter(
itemComparator: DisplayItemComperator,
factoryMap: Map<Int, ViewHolderFactory>,
binderMap: Map<Int, ViewHolderBinder>,
androidPreconditions: AndroidPreconditions
): RecyclerViewAdapter {
return RecyclerViewAdapter(
itemComperator = itemComparator,
viewHolderFactoryMap = factoryMap,
viewBinderFactoryMap = binderMap,
androidPreconditions = androidPreconditions
)
}
}
@Binds
@IntoMap
@IntKey(MESSAGES)
internal abstract fun provideMessagesViewModelFactory(factory: MessagesViewHolder.MessageViewHolderFactory): ViewHolderFactory
@Binds
@IntoMap
@IntKey(MESSAGES)
internal abstract fun provideMessagesViewHolderBinder(binder: MessagesViewHolder.MessagesViewHolderBinder): ViewHolderBinder
}