问题描述
我有一个课程 StartRouter
。我想为每个活动提供此类的不同实例,并在活动仍然存在的情况下保持活动状态(为此,我创建了 @ActivityScope
)。
I have a class StartRouter
. I want to provide different instances of this class to each activity, and keep it alive as long as activity is alive (for that I made @ActivityScope
).
问题是它在我的代码中没有做到这一点。在我的情况下,匕首似乎为每个注释提供了一个实例,对于 @ActivityScope
而言,它一次。此范围是自定义匕首范围。
Problem is that it does not do that in my code. It seems as dagger provides one instance per annotation, in my case, once for the @ActivityScope
. This scope is a custom dagger scope.
这是我的两个模块(每个活动一个),第一个模块:
Here are my two modules (One for each activity), first module:
@Module
public class SplashModule {
@Provides
SplashVMFactory splashVMFactory(StartRouter startRouter){
return new SplashVMFactory(startRouter);
@Provides
StartRouter startRouter(){
return new StartRouter();
}
}
第二个模块:
@Module
public class QuestionModule {
@Provides
QuestionVMFactory questionVMFactory(StartRouter startRouter){
return new QuestionVMFactory(startRouter);
}
@Provides
StartRouter startRouter(){
return new StartRouter();
}
}
我有这个:
@Module
public abstract class BinderModule {
@ActivityScope
@ContributesAndroidInjector(modules = SplashModule.class)
abstract SplashActivity bindSplashActivity();
@ActivityScope
@ContributesAndroidInjector(modules = QuestionModule.class)
abstract QuestionActivity bindQuestionActivity();
}
我的应用程序组件:
@ApplicationScope
@Component(modules = {AndroidInjectionModule.class,
BinderModule.class,
SplashModule.class,
QuestionModule.class})
public interface AppComponent {
@Component.Builder
interface Builder {
@BindsInstance
Builder application(App app);
AppComponent build();
}
void inject(App app);
}
当我运行此命令时,出现此错误:
When I run this I get this error:
error: [Dagger/DuplicateBindings] com.example.StartRouter is bound multiple times:
@Provides com.example.StartRouter com.example.QuestionModule.startRouter()
@Provides com.example.StartRouter com.example.SplashModule.startRouter()
com.example.StartRouter is injected at
com.example.LoginModule.loginVMFactory(…, startRouter)
com.example.LoginVMFactory is injected at
com.example.LoginActivity.factory
com.example.LoginActivity is injected at
dagger.android.AndroidInjector.inject(T) [com.example.AppComponent ? com.example.BinderModule_BindLoginActivity.LoginActivitySubcomponent]
It is also requested at:
com.example.QuestionModule.questionVMFactory(…, startRouter)
The following other entry points also depend on it:
dagger.android.AndroidInjector.inject(T) [com.example.AppComponent ? com.example.BinderModule_BindQuestionActivity.QuestionActivitySubcomponent]
(除了两个示例,其他模块还提供了StartRouter作为您可以从我的错误中看到)。
(Also have StartRouter provided in other modules than the two examples as you can see from my error).
我想,如果我理解正确,那是由于使用 @ActivityScope $ c $在
BinderModule
和 @ContributesAndroidInjector
中的c>会为每个活动的活动创建不同的组件,只要活动本身即可,但是我似乎理解错了?
I thought, if I have understood right, that from the usage of @ActivityScope
in BinderModule
with @ContributesAndroidInjector
would create different Components for each activity that is alive as long as the activity itself, but I seem to have understood wrong?
如果我在 StartRouter > @module ,方法是使用 @named
并提供1个模块,而无需提供 @named
然后通过提供不同的 StartRouter
实例来解决问题?但这对我的问题没有帮助。简而言之,我的问题是我无法提供有效的 @ActivityScoped
StartRouter
实例(每个活动1个)与活动本身一样充实。关于如何执行此操作的任何建议?
If I differentiate between the different StartRouter
in my @module
s by using @named
and having 1 module to provide without @named
then that will solve the problem by providing different StartRouter
instances? But that does not help me with my problem. My problem is, in short, I have trouble providing @ActivityScoped
StartRouter
instances (1 for each activity) that is alive as loong as the activity itself. Any suggestions on how I could do that?
推荐答案
您的设置很好,但是您也 将两个模块(都绑定 StartRouter
)都添加到 AppComponent
,因此多次绑定该错误。 / p>
Your setup is fine but for the fact that you also add both modules (both binding StartRouter
) to AppComponent
, thus the error that you bind it multiple times.
@Component(modules = {AndroidInjectionModule.class,
BinderModule.class,
SplashModule.class, // <== 1.
QuestionModule.class}) // <== 2.
public interface AppComponent { .. }
由于您希望每个Activity一个实例,因此无需将模块添加到 AppComponent
。您应该可以从其中删除这两个模块。
Since you want one instance per Activity there is no need to add the modules to AppComponent
. You should be able to remove those 2 modules from it.
这篇关于错误:[Dagger / DuplicateBindings] com.example.StartRouter已绑定多次?的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持!