Dagger: IllegalArgumentException: No injector factory bound for Class

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@SingletonProductListRepository 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@SingletonProductListRepository provideProductListRepository(ProductListRepositoryImpl repository) {    return repository;}

Which may be substituted with following:

@Binds@Singletonabstract ProductListRepository provideProductListRepository(ProductListRepositoryImpl repository);

For this error: "Dagger: IllegalArgumentException: No injector factory bound for Class"

If you are using Navigation Component with Single Activity, you can see this error.

What should you do?

Please check your @Module abstract class FragmentProvider { ... } because you need to add your Fragment inside of it as Contribute.

@Moduleabstract class FragmentProvider {  @ContributesAndroidInjector // <-- Do not forget this line.  abstract fun contributeYourNewFragment(): YourNewFragment}

Using the @contrubutesAndroidInjector requires an additional annotationProcessor.

Add this line to your gradle build file:

annotationProcessor 'com.google.dagger:dagger-android-processor:2.11'