匕首2使用Presenter時不能注入構造函數的第二個參數

-1

在ProfileExtendedPresenter中，當我只將視圖（第一個參數）放入構造函數時，它就起作用。隨着第二energyProfileRepository我得到的錯誤如下：匕首2使用Presenter時不能注入構造函數的第二個參數

錯誤消息：

ProfileExtendedComponent.inject(ProfileExtendedActivity)] EnergyProfileRepository cannot be provided without an @Inject constructor or from an @Provides-annotated method. 
EnergyProfileRepository is injected at 
RepositoryModule.energyProfileRepository(energyProfileRepository) 
Repository<EnergyProfile> is injected at 
ProfileExtendedPresenter.<init>(…, energyProfileRepository) 
ProfileExtendedPresenter is injected at 
ProfileExtendedModule.presenter(presenter) 
ProfileExtendedMvp.Presenter is injected at 
ProfileExtendedActivity.presenter 
.ProfileExtendedActivity is injected at 
.ProfileExtendedComponent.inject(activity)

我認爲這是與演示。但注射的範圍是活動。我認爲這是正確的？我添加了所有文件，但不確定這是否太多，因爲我不知道問題的確切位置。

@Singleton 
@Component(modules = {AppModule.class, RepositoryModule.class}) 
public interface AppComponent { 
    ProfileExtendedComponent plus(ProfileExtendedModule module); 
} 

@Module 
public class AppModule { 

    @Provides 
    @AppContext 
    @Singleton 
    public Context context() { 
     return Application.getInstance(); 
    } 

    @Provides 
    @Singleton 
    public Resources resources(@AppContext Context context) { 
     return context.getResources(); 
    } 
} 


@Module 
public class ProfileExtendedModule { 

    private ProfileExtendedMvp.View view; 

    public ProfileExtendedModule(ProfileExtendedMvp.View view) { 
     this.view = view; 
    } 

    @Provides 
    public ProfileExtendedMvp.View view() { 
     return view; 
    } 

    @Provides 
    public ProfileExtendedMvp.Presenter presenter(ProfileExtendedPresenter presenter) { 
     return presenter; 
    } 
} 



@Module 
public class RepositoryModule { 

    @Provides 
    @Singleton 
    public Repository<EnergyProfile> energyProfileRepository(EnergyProfileRepository energyProfileRepository) { 
     return energyProfileRepository; 
    } 
} 



@Subcomponent(modules = {ProfileExtendedModule.class}) 
public interface ProfileExtendedComponent { 
    void inject(ProfileExtendedActivity activity); 
} 




public class ProfileExtendedActivity extends BaseActivity implements ProfileExtendedMvp.View { 

    @Inject 
    ProfileExtendedMvp.Presenter presenter; 


    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     injectDependencies(Application.getInstance().getAppComponent()); 
     presenter.init(); 
    } 
} 


public class ProfileExtendedPresenter implements ProfileExtendedMvp.Presenter { 

    ProfileExtendedMvp.View view; 

Repository<EnergyProfile> energyProfileRepository; 

@Inject 
public ProfileExtendedPresenter(ProfileExtendedMvp.View view, Repository<EnergyProfile> energyProfileRepository) { 
    this.view = view; 
    this.energyProfileRepository = energyProfileRepository; 
} 

} 

public interface ProfileExtendedMvp { 

    interface View extends Mvp.View { 
    } 

    interface Presenter extends Mvp.Presenter { 

     void init(); 
    } 
} 

public class EnergyProfileRepository implements Repository<EnergyProfile> { 

    @Override 
    public Observable<EnergyProfile> fetch() { 
     return null; 
    } 
} 

public interface Repository<T> { 
    Observable<T> fetch(); 
} 


public class EnergyProfile implements Cacheable { 
    @Json(name = "availableType") 
    private Map<String, String> houseTypesContainer; 
} 

public interface Cacheable { 
    void setCached(); 
    boolean isCached(); 
}

來源

2017-08-08 Jim Clermonts

的可能的複製[如何解決匕首2錯誤「......不能提供\ [\]」？ ]（https://stackoverflow.com/questions/44912080/how-doi-i-fix-dagger-2-error-cannot-be-provided） –

@DavidMedenjak這看起來不像重複。我認爲主持人與它有關。 –

請按照答案中的描述仔細驗證您的代碼。您沒有包括您提供「EnergyProfileRepository」的位置或方式，也沒有包含完整的注入跟蹤（錯誤消息後面的行）。你將一個實現綁定到接口，但是如果沒有@Inject構造函數或者@提供註釋方法，就不能提供實現* –

這需要在EnergyProfileRepository類添加：

@Inject 
public EnergyProfileRepository() { 
}

來源

2017-08-09 09:22:18

匕首2使用Presenter時不能注入構造函數的第二個參數

回答

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