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Using activity level dependencies in fragments with dagger2

What is dependency injection?How do save an Android Activity state using save instance state?Activity restart on rotation AndroidStop EditText from gaining focus at Activity startupInversion of Control vs Dependency InjectionDagger2 dependent componentsRequestQueue cannot be provided without an inject constructorAndroid-Dagger2 - Can't get dependencies from Application component into Activity ScopeDagger2 can not provide dependancyDagger2 injects null object

0

I have a project structure like this:

@Component(modules = AndroidSupportInjectionModule.class, AppModule.class, 
ActivityBinderModule.class)
public interface ApplicationComponent extends AndroidInjector<MyApplication> 
...

I have a bunch of app level dependencies defined in AppModule

@Module
public abstract class ActivityBinderModule 

@ActivityScope
@ContributesAndroidInjector(modules = MainActivityModule.class, FragmentBinderModule.class)
abstract MainActivity bindMainActivity();

I have some activity level dependencies defined in MainActivityModule, e.g. the FragmentManager

@Module
public abstract class FragmentBinderModule 

@ContributesAndroidInjector(modules = MainPageModule.class)
@FragmentScope
abstract MainPageFragment provideMainPageFragment();

I have the MainPageFragment specific dependencies defined in MainPageModule, like DialogFactory (scoped with @FragmentScope), which needs a FragmentManager

I would like to use the FragmentManager instance provided by MainActivityModule in DialogFactory, but I got the error:

FragmentManager cannot be provided without an @Provides-annotated method.

When I add a provider for the FragmentManager in MainPageModule, I get this error:

FragmentManager is bound multiple times: MainActivityModule and MainPageModule

What am I doing wrong?

android dependency-injection dagger-2

share|improve this question

asked 2 days ago

AnalizerAnalizer

9401022

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Is FragmentManager the Android FragmentManager or some class of yours ?
  
  – Blackbelt
  2 days ago
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  the Android one, SupportFragmentManager
  
  – Analizer
  2 days ago
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  why do you need dagger to provide that for you?
  
  – Blackbelt
  2 days ago
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  So I can just inject it to all the classes needing it, but my question is a bit bigger then that, I could have asked it more generally: How can I inject Activity level dependencies into Fragment level objects?, this was just the example triggering it
  
  – Analizer
  2 days ago
  
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  in your case you have to different modules providing the same dependency (FragmentManager). To circumvent the error you can use the @Named annotation. In the specific case, I don't see the reason to inject something, the system provides already.
  
  – Blackbelt
  2 days ago
  
  

  
  
  
  

 | 
show 4 more comments

0

I have a project structure like this:

@Component(modules = AndroidSupportInjectionModule.class, AppModule.class, 
ActivityBinderModule.class)
public interface ApplicationComponent extends AndroidInjector<MyApplication> 
...

I have a bunch of app level dependencies defined in AppModule

@Module
public abstract class ActivityBinderModule 

@ActivityScope
@ContributesAndroidInjector(modules = MainActivityModule.class, FragmentBinderModule.class)
abstract MainActivity bindMainActivity();

I have some activity level dependencies defined in MainActivityModule, e.g. the FragmentManager

@Module
public abstract class FragmentBinderModule 

@ContributesAndroidInjector(modules = MainPageModule.class)
@FragmentScope
abstract MainPageFragment provideMainPageFragment();

I have the MainPageFragment specific dependencies defined in MainPageModule, like DialogFactory (scoped with @FragmentScope), which needs a FragmentManager

I would like to use the FragmentManager instance provided by MainActivityModule in DialogFactory, but I got the error:

FragmentManager cannot be provided without an @Provides-annotated method.

When I add a provider for the FragmentManager in MainPageModule, I get this error:

FragmentManager is bound multiple times: MainActivityModule and MainPageModule

What am I doing wrong?

android dependency-injection dagger-2

share|improve this question

asked 2 days ago

AnalizerAnalizer

9401022

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Is FragmentManager the Android FragmentManager or some class of yours ?
  
  – Blackbelt
  2 days ago
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  the Android one, SupportFragmentManager
  
  – Analizer
  2 days ago
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  why do you need dagger to provide that for you?
  
  – Blackbelt
  2 days ago
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  So I can just inject it to all the classes needing it, but my question is a bit bigger then that, I could have asked it more generally: How can I inject Activity level dependencies into Fragment level objects?, this was just the example triggering it
  
  – Analizer
  2 days ago
  
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  in your case you have to different modules providing the same dependency (FragmentManager). To circumvent the error you can use the @Named annotation. In the specific case, I don't see the reason to inject something, the system provides already.
  
  – Blackbelt
  2 days ago
  
  

  
  
  
  

 | 
show 4 more comments

I have a project structure like this:

@Component(modules = AndroidSupportInjectionModule.class, AppModule.class, 
ActivityBinderModule.class)
public interface ApplicationComponent extends AndroidInjector<MyApplication> 
...

I have a bunch of app level dependencies defined in AppModule

@Module
public abstract class ActivityBinderModule 

@ActivityScope
@ContributesAndroidInjector(modules = MainActivityModule.class, FragmentBinderModule.class)
abstract MainActivity bindMainActivity();

I have some activity level dependencies defined in MainActivityModule, e.g. the FragmentManager

@Module
public abstract class FragmentBinderModule 

@ContributesAndroidInjector(modules = MainPageModule.class)
@FragmentScope
abstract MainPageFragment provideMainPageFragment();

I have the MainPageFragment specific dependencies defined in MainPageModule, like DialogFactory (scoped with @FragmentScope), which needs a FragmentManager

I would like to use the FragmentManager instance provided by MainActivityModule in DialogFactory, but I got the error:

FragmentManager cannot be provided without an @Provides-annotated method.

When I add a provider for the FragmentManager in MainPageModule, I get this error:

FragmentManager is bound multiple times: MainActivityModule and MainPageModule

What am I doing wrong?

android dependency-injection dagger-2

share|improve this question

asked 2 days ago

AnalizerAnalizer

9401022

@Component(modules = AndroidSupportInjectionModule.class, AppModule.class, 
ActivityBinderModule.class)
public interface ApplicationComponent extends AndroidInjector<MyApplication> 
...

@Module
public abstract class ActivityBinderModule 

@ActivityScope
@ContributesAndroidInjector(modules = MainActivityModule.class, FragmentBinderModule.class)
abstract MainActivity bindMainActivity();

@Module
public abstract class FragmentBinderModule 

@ContributesAndroidInjector(modules = MainPageModule.class)
@FragmentScope
abstract MainPageFragment provideMainPageFragment();

android dependency-injection dagger-2

android dependency-injection dagger-2

share|improve this question

asked 2 days ago

AnalizerAnalizer

9401022

share|improve this question

asked 2 days ago

AnalizerAnalizer

9401022

asked 2 days ago

AnalizerAnalizer

9401022

asked 2 days ago

AnalizerAnalizer

9401022