匕首:IllegalArgumentException:没有为类绑定的注射器工厂

问题描述

限时删除！！

我是Dagger 2的新手.我有2个Activity，我想同时使用这两个注入的ViewModel.这是我的 ViewModuleFactory :

I am new to Dagger 2. I have 2 Activities, I want to use injected ViewModel for both. Here is my ViewModuleFactory :

@Singleton
public class ProductViewModelFactory implements ViewModelProvider.Factory {

    private final Map<Class<? extends ViewModel>, Provider<ViewModel>> creators;

    @Inject
    public ProductViewModelFactory(Map<Class<? extends ViewModel>, Provider<ViewModel>> creators) {
        this.creators = creators;
    }


    @SuppressWarnings("unchecked")
    @Override
    public <T extends ViewModel> T create(Class<T> modelClass) {
        Provider<? extends ViewModel> creator = creators.get(modelClass);
        if (creator == null) {
            for (Map.Entry<Class<? extends ViewModel>, Provider<ViewModel>> entry : creators.entrySet()) {
                if (modelClass.isAssignableFrom(entry.getKey())) {
                    creator = entry.getValue();
                    break;
                }
            }
        }
        if (creator == null) {
            throw new IllegalArgumentException("unknown viewmodel class " + modelClass);
        }
        try {
            return (T) creator.get();
        } catch (Exception e) {
            throw new RuntimeException(e);
        }
    }
}

我的 ViewModelModule :

@Module
abstract class ViewModelModule {
    @Binds
    @IntoMap
    @ViewModelKey(ProductListViewModel.class)
    abstract ViewModel bindProductListViewModel(ProductListViewModel listViewModel);

    @Binds
    @IntoMap
    @ViewModelKey(ProductDetailsViewModel.class)
    abstract ViewModel bindProductDetailsViewModel(ProductDetailsViewModel detailsViewModel);

    @Binds
    abstract ViewModelProvider.Factory bindViewModelFactory(ProductViewModelFactory factory);
}

我的 ViewModelKey 用于映射:

@Documented
@Target({ElementType.METHOD})
@Retention(RetentionPolicy.RUNTIME)
@MapKey
@interface ViewModelKey {
    Class<? extends ViewModel> value();
}

我的 ActivityModule :

@Module
public abstract class ActivityModule {
    abstract ProductListActivity contributeProductListActivity();
    abstract ProductDetailsActivity contributeProductDetailsActivity();
}

我的 AppModule :

@Module
class AppModule {

@Provides
    @Singleton
    RedMartProductService provideRedMartProductService() {
        ........
    }

    @Provides
    @Singleton
    ProductListRepository provideProductListRepository(ProductListRepository repository) {
        return repository;
    }

    @Provides
    @Singleton
    ProductDetailsRepository provideProductDetailsRepository(ProductDetailsRepository repository) {
        return repository;
    }
}

我的 AppComponent :

@Singleton
@Component(modules = {AndroidInjectionModule.class, ActivityModule.class, AppModule.class})
public interface AppComponent {
    @Component.Builder
    interface Builder {
        @BindsInstance
        Builder application(Application application);

        AppComponent build();
    }

    void inject(MartApplication martApp);
}

我的应用:

public class MartApplication extends Application implements HasActivityInjector {

    @Inject
    DispatchingAndroidInjector<Activity> dispatchingAndroidInjector;

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

    @Override
    public DispatchingAndroidInjector<Activity> activityInjector() {
        return dispatchingAndroidInjector;
    }
}

在活动中:

@Inject
ViewModelProvider.Factory viewModelFactory;
.......
AndroidInjection.inject(activity); // Throwing exception
ListViewModel = ViewModelProviders.of(this, viewModelFactory).get(ProductListViewModel.class);

它在注入时引发异常:

java.lang.IllegalArgumentException: No injector factory bound for Class<com.mymart.ui.ProductListActivity>

任何人都可以帮助我确定代码中的问题吗?

Can anyone help me identify the problem in my code?

............................................... ........................

.......................................................................

编辑:我按照@azizbekian尝试使用ContributesAndroidInjector，但是在构建时导致以下错误:

Edit: I tried with ContributesAndroidInjector as per @azizbekian, but it resulted following error on build:

    error: [dagger.android.AndroidInjector.inject(T)] Found a dependency cycle:
com.mymart.repository.ProductListRepository is injected at
com.mymart.di.AppModule.provideProductListRepository(repository)
com.mymart.repository.ProductListRepository is injected at
com.mymart.viewmodel.ProductListViewModel.<init>(productListRepository)
com.mymart.viewmodel.ProductListViewModel is injected at
com.mymart.di.ViewModelModule.bindProductListViewModel(listViewModel)
java.util.Map<java.lang.Class<? extends android.arch.lifecycle.ViewModel>,javax.inject.Provider<android.arch.lifecycle.ViewModel>> is injected at
com.mymart.viewmodel.ProductViewModelFactory.<init>(creators)
com.mymart.viewmodel.ProductViewModelFactory is injected at
com.mymart.di.ViewModelModule.bindViewModelFactory(factory)
android.arch.lifecycle.ViewModelProvider.Factory is injected at
com.mymart.ui.ProductListActivity.viewModelFactory
com.mymart.ui.ProductListActivity is injected at
dagger.android.AndroidInjector.inject(arg0)

编辑2 经过所有更改后，我再次遇到异常:

Edit 2After all changes, I am facing again exception:

java.lang.RuntimeException: Unable to create application com.kaushik.myredmart.MartApplication: java.lang.IllegalStateException: com.kaushik.myredmart.di.AppModule must be set
                                                 at android.app.ActivityThread.handleBindApplication(ActivityThread.java:4710)
                                                 at android.app.ActivityThread.-wrap1(ActivityThread.java)
                                                 at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1405)
                                                 at android.os.Handler.dispatchMessage(Handler.java:102)
                                                 at android.os.Looper.loop(Looper.java:148)
                                                 at android.app.ActivityThread.main(ActivityThread.java:5417)
                                                 at java.lang.reflect.Method.invoke(Native Method)
                                                 at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)
                                                 at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)
                                              Caused by: java.lang.IllegalStateException: com.kaushik.myredmart.di.AppModule must be set
                                                 at com.kaushik.myredmart.di.DaggerAppComponent$Builder.build(DaggerAppComponent.java:180)
                                                 at com.kaushik.myredmart.di.AppInjector.init(AppInjector.java:30)
                                                 at com.kaushik.myredmart.MartApplication.onCreate(MartApplication.java:28)
                                                 at android.app.Instrumentation.callApplicationOnCreate(Instrumentation.java:1013)
                                                 at android.app.ActivityThread.handleBindApplication(ActivityThread.java:4707)
                                                 at android.app.ActivityThread.-wrap1(ActivityThread.java) 
                                                 at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1405) 
                                                 at android.os.Handler.dispatchMessage(Handler.java:102) 
                                                 at android.os.Looper.loop(Looper.java:148) 
                                                 at android.app.ActivityThread.main(ActivityThread.java:5417) 
                                                 at java.lang.reflect.Method.invoke(Native Method)

推荐答案

我相信您忘记了放置@ContributesAndroidInjector批注:

I believe you have forgot to put @ContributesAndroidInjector annotation:

    @Module
    public abstract class ActivityModule {
        @ContributesAndroidInjector
        abstract ProductListActivity contributeProductListActivity();
        @ContributesAndroidInjector
        abstract ProductDetailsActivity contributeProductDetailsActivity();
    }

并将ViewModelModule包含在AppModule中:

    @Module(includes = ViewModelModule.class)
    class AppModule {
        ...
    }

---

请参阅您编写的以下代码:

---

See this code that you have wrote:

@Provides
@Singleton
ProductListRepository provideProductListRepository(ProductListRepository repository) {
    return repository;
}

您期望发生什么?您是在告诉匕首嘿，匕首，每当我要求您提供ProductListRepository然后使用ProductListRepository" 创建(返回)该对象时.那是行不通的.

What do you expect to happen? You are telling dagger "hey, dagger, whenever I ask you to provide me ProductListRepository then create(return) that object using ProductListRepository". That's not gonna work out.

您可能想要的是，匕首，每当我要求您提供ProductListRepository的实现，然后使用ProductListRepositoryImpl" 创建(返回)该对象:

Most possibly what you intended was "hey, dagger, whenever I ask you to provide me an implementation of ProductListRepository then create(return) that object using ProductListRepositoryImpl":

@Provides
@Singleton
ProductListRepository provideProductListRepository(ProductListRepositoryImpl repository) {
    return repository;
}

可以用以下内容代替:

@Binds
@Singleton
abstract ProductListRepository provideProductListRepository(ProductListRepositoryImpl repository);

这篇关于匕首:IllegalArgumentException:没有为类绑定的注射器工厂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！

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