Dagger: IllegalArgumentException: 没有绑定到类的注入器工厂 [英] Dagger: IllegalArgumentException: No injector factory bound for Class
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问题描述
我是 Dagger 2 的新手.我有 2 个活动，我想为这两个活动使用注入的 ViewModel.这是我的 ViewModuleFactory:
@Singleton公共类 ProductViewModelFactory 实现 ViewModelProvider.Factory {私人最终地图<类，提供者<视图模型>>创作者；@注入public ProductViewModelFactory(Map, Provider> creators) {this.creators = 创造者；}@SuppressWarnings("未选中")@覆盖public <T extends ViewModel>T 创建(类 模型类){供应商creator = creators.get(modelClass);如果(创建者 == 空){for (Map.Entry, Provider> entry : creators.entrySet()) {如果 (modelClass.isAssignableFrom(entry.getKey())) {创建者 = entry.getValue();休息;}}}如果(创建者 == 空){throw new IllegalArgumentException("未知视图模型类" + modelClass);}尝试 {返回(T)creator.get()；} 捕获(异常 e){抛出新的运行时异常(e)；}}} 我的ViewModelModule:
@Module抽象类 ViewModelModule {@绑定@IntoMap@ViewModelKey(ProductListViewModel.class)抽象视图模型 bindProductListViewModel(ProductListViewModel listViewModel);@绑定@IntoMap@ViewModelKey(ProductDetailsViewModel.class)抽象 ViewModel bindProductDetailsViewModel(ProductDetailsViewModel detailsViewModel);@绑定抽象 ViewModelProvider.Factory bindViewModelFactory(ProductViewModelFactory factory);}我的 ViewModelKey 用于映射:
@Documented@Target({ElementType.METHOD})@Retention(RetentionPolicy.RUNTIME)@地图键@interface ViewModelKey {类价值();}我的ActivityModule:
@Module公共抽象类 ActivityModule {抽象 ProductListActivity 贡献ProductListActivity();抽象 ProductDetailsActivity 贡献ProductDetailsActivity();}我的AppModule:
@Module类 AppModule {@提供@单身人士RedMartProductService providerRedMartProductService() {…………}@提供@单身人士ProductListRepository provideProductListRepository(ProductListRepository 存储库){返回存储库；}@提供@单身人士ProductDetailsRepository 提供ProductDetailsRepository(ProductDetailsRepository 存储库) {返回存储库；}}我的AppComponent:
@Singleton@Component(modules = {AndroidInjectionModule.class, ActivityModule.class, AppModule.class})公共接口 AppComponent {@Component.Builder界面生成器{@绑定实例构建器应用程序(Application application)；AppComponent build();}无效注入(MartApplication martApp)；}我的申请:
public class MartApplication extends Application 实现 HasActivityInjector {@注入调度AndroidInjector调度AndroidInjector；@覆盖公共无效 onCreate() {super.onCreate();}@覆盖公共调度AndroidInjector活动注入器(){返回调度AndroidInjector；}} 在活动中:
@InjectViewModelProvider.Factory viewModelFactory;......AndroidInjection.inject(活动);//抛出异常ListViewModel = ViewModelProviders.of(this, viewModelFactory).get(ProductListViewModel.class);它在注入时抛出异常:
java.lang.IllegalArgumentException: 没有为 Class 绑定注入器工厂 谁能帮我找出代码中的问题?
.........................................................
编辑:我按照@azizbekian 尝试使用 ContributesAndroidInjector，但在构建时出现以下错误:
error: [dagger.android.AndroidInjector.inject(T)] 发现一个依赖循环:com.mymart.repository.ProductListRepository 注入com.mymart.di.AppModule.provideProductListRepository(repository)com.mymart.repository.ProductListRepository 注入com.mymart.viewmodel.ProductListViewModel.(productListRepository)com.mymart.viewmodel.ProductListViewModel 被注入com.mymart.di.ViewModelModule.bindProductListViewModel(listViewModel)java.util.Map,javax.inject.Provider>注射在com.mymart.viewmodel.ProductViewModelFactory.(创建者)com.mymart.viewmodel.ProductViewModelFactory 被注入com.mymart.di.ViewModelModule.bindViewModelFactory(工厂)android.arch.lifecycle.ViewModelProvider.Factory 被注入com.mymart.ui.ProductListActivity.viewModelFactorycom.mymart.ui.ProductListActivity 被注入dagger.android.AndroidInjector.inject(arg0) 编辑 2在所有更改之后，我再次面临异常:
java.lang.RuntimeException: 无法创建应用程序 com.kaushik.myredmart.MartApplication: java.lang.IllegalStateException: com.kaushik.myredmart.di.AppModule 必须设置在 android.app.ActivityThread.handleBindApplication(ActivityThread.java:4710)在 android.app.ActivityThread.-wrap1(ActivityThread.java)在 android.app.ActivityThread$H.handleMessage(ActivityThread.java:1405)在 android.os.Handler.dispatchMessage(Handler.java:102)在 android.os.Looper.loop(Looper.java:148)在 android.app.ActivityThread.main(ActivityThread.java:5417)在 java.lang.reflect.Method.invoke(Native Method)在 com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)在 com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)引起:java.lang.IllegalStateException:com.kaushik.myredmart.di.AppModule 必须设置在 com.kaushik.myredmart.di.DaggerAppComponent$Builder.build(DaggerAppComponent.java:180)在 com.kaushik.myredmart.di.AppInjector.init(AppInjector.java:30)在 com.kaushik.myredmart.MartApplication.onCreate(MartApplication.java:28)在 android.app.Instrumentation.callApplicationOnCreate(Instrumentation.java:1013)在 android.app.ActivityThread.handleBindApplication(ActivityThread.java:4707)在 android.app.ActivityThread.-wrap1(ActivityThread.java)在 android.app.ActivityThread$H.handleMessage(ActivityThread.java:1405)在 android.os.Handler.dispatchMessage(Handler.java:102)在 android.os.Looper.loop(Looper.java:148)在 android.app.ActivityThread.main(ActivityThread.java:5417)在 java.lang.reflect.Method.invoke(Native Method) 解决方案
相信你忘了放 @ContributesAndroidInjector 注解:
并在 AppModule 中包含 ViewModelModule:
<小时>
看看你写的这段代码:
@Provides@单身人士ProductListRepository provideProductListRepository(ProductListRepository 存储库){返回存储库；}你期望发生什么?你告诉 dagger 嘿，dagger，每当我要求你提供我 ProductListRepository 然后使用 ProductListRepository 创建(返回)那个对象".那行不通.
很可能你想要的是嘿，匕首，每当我要求你提供一个 ProductListRepository 的实现然后使用 ProductListRepositoryImpl 创建(返回)那个对象>":
@Provides@单身人士ProductListRepository provideProductListRepository(ProductListRepositoryImpl 存储库){返回存储库；}可以替换为以下内容:
@Binds@单身人士抽象 ProductListRepository provideProductListRepository(ProductListRepositoryImpl 存储库)；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);
}
}
}
My 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);
}
My ViewModelKey for mapping:
@Documented
@Target({ElementType.METHOD})
@Retention(RetentionPolicy.RUNTIME)
@MapKey
@interface ViewModelKey {
Class<? extends ViewModel> value();
}
My ActivityModule :
@Module
public abstract class ActivityModule {
abstract ProductListActivity contributeProductListActivity();
abstract ProductDetailsActivity contributeProductDetailsActivity();
}
My AppModule:
@Module
class AppModule {
@Provides
@Singleton
RedMartProductService provideRedMartProductService() {
........
}
@Provides
@Singleton
ProductListRepository provideProductListRepository(ProductListRepository repository) {
return repository;
}
@Provides
@Singleton
ProductDetailsRepository provideProductDetailsRepository(ProductDetailsRepository repository) {
return repository;
}
}
My 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);
}
My Application:
public class MartApplication extends Application implements HasActivityInjector {
@Inject
DispatchingAndroidInjector<Activity> dispatchingAndroidInjector;
@Override
public void onCreate() {
super.onCreate();
}
@Override
public DispatchingAndroidInjector<Activity> activityInjector() {
return dispatchingAndroidInjector;
}
}
In Activity:
@Inject
ViewModelProvider.Factory viewModelFactory;
.......
AndroidInjection.inject(activity); // Throwing exception
ListViewModel = ViewModelProviders.of(this, viewModelFactory).get(ProductListViewModel.class);
It is throwing an exception on inject:
java.lang.IllegalArgumentException: No injector factory bound for Class<com.mymart.ui.ProductListActivity>
Can anyone help me identify the problem in my code?
.......................................................................
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)
Edit 2 After 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)
解决方案
I believe you have forgot to put @ContributesAndroidInjector annotation:
@Module
public abstract class ActivityModule {
@ContributesAndroidInjector
abstract ProductListActivity contributeProductListActivity();
@ContributesAndroidInjector
abstract ProductDetailsActivity contributeProductDetailsActivity();
}
And include ViewModelModule within AppModule:
@Module(includes = ViewModelModule.class)
class AppModule {
...
}
See this code that you have wrote:
@Provides
@Singleton
ProductListRepository provideProductListRepository(ProductListRepository repository) {
return repository;
}
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.
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;
}
Which may be substituted with following:
@Binds
@Singleton
abstract ProductListRepository provideProductListRepository(ProductListRepositoryImpl repository);
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