如何在Dagger 2中使用多个依赖关系？

Question

我已经创建了NetComponent和NetModule，用于初始化网络通信所需的所有库。

这里是NetComponent代码：

@Singleton 
@Component(modules={AppModule.class, NetModule.class}) 
public interface NetComponent { 
    Retrofit retrofit(); 
} 

我已经initalised是NetComponent内部应用程序类。

public class App extends Application { 

private NetComponent mNetComponent; 

@Override 
public void onCreate() { 
    super.onCreate(); 

    mNetComponent = DaggerNetComponent.builder() 
      .appModule(new AppModule(this)) 
      .netModule(new NetModule("mock.com")) 
      .build(); 
} 

public NetComponent getNetComponent() { 
    return mNetComponent; 
    } 
} 

现在我想在我的应用程序中使用SharedPreferences，所以我创建了SharedPreferencesModule和Component类。

@Module 
public class SharedPreferenceModule { 

Application mApplication; 

public SharedPreferenceModule(Application mApplication) { 
    this.mApplication = mApplication; 
} 

@Provides 
@Singleton 
Application providesApplication() { 
    return mApplication; 
} 

@Provides 
@Singleton 
SharedPreferences providesSharedPreferences(Application application) { 
    return PreferenceManager.getDefaultSharedPreferences(application); 
    } 
} 

下面是从SharedPreferencesComponent代码：

@Singleton 
@Component(modules = {SharedPreferenceModule.class}) 
public interface SharedPreferenceComponent { 
    SharedPreferences getSharedPreference(); 
} 

我想用我的LoginAccountFragment内类。 LoginAccountFragment类有它自己的模块和组件。

@Module 
public class LoginAccountModule { 

private LoginAccountView view; 

public LoginAccountModule(LoginAccountView view){ 
    this.view = view; 
} 

@Provides 
@FragmentScoped 
LoginAccountView providesLoginAccountView(){ 
    return view; 
} 

@Provides 
@FragmentScoped 
LoginAccountPresenter providesLoginAccountPresenter(LoginAccountPresenterImpl presenter){ 
    return presenter; 
    } 
} 

@FragmentScoped 
@Component(dependencies = {NetComponent.class}, modules = LoginAccountModule.class) 
public interface LoginAccountComponent { 
    void inject(LoginAccountFragment fragment); 
} 

我该如何在LoginAccountFragment中注入SharedPreferences？

Answer 1

@Singleton 
@Component(modules={AppModule.class, NetModule.class, SharedPreferenceModule.class}) 
public interface ApplicationComponent { 
    Retrofit retrofit(); 
    SharedPreferences sharedPreferences(); 
} 


public class App extends Application { 

    private ApplicationComponent applicationComponent; 

    @Override 
    public void onCreate() { 
     super.onCreate(); 

     this.applicationComponent = DaggerNetComponent.builder() 
       .appModule(new AppModule(this)) 
       .netModule(new NetModule("https://mock.com")) 
       .build(); 
    } 

    public ApplicationComponent applicationComponent() { 
     return applicationComponent; 
    } 
} 

@Module 
public class SharedPreferenceModule { 
    @Provides 
    @Singleton 
    SharedPreferences providesSharedPreferences(Application application) { 
     return PreferenceManager.getDefaultSharedPreferences(application); 
    } 
} 


@Module 
public class LoginAccountModule { 

    private LoginAccountView view; 

    public LoginAccountModule(LoginAccountView view){ 
     this.view = view; 
    } 

    @Provides 
    LoginAccountView loginAccountView(){ 
     return view; 
    } 

    @Provides 
    @FragmentScoped 
    LoginAccountPresenter loginAccountPresenter(LoginAccountPresenterImpl presenter) { 
     return presenter; 
    } 
} 

@FragmentScoped 
@Component(dependencies = {ApplicationComponent.class}, modules = LoginAccountModule.class) 
public interface LoginAccountComponent extends ApplicationComponent { 
    void inject(LoginAccountFragment fragment); 
}