Dagger 2: cannot be provided without @ Gives-annotated method

Question

I just started to study dagger2 and ran into a strange problem that looks like a mistake to me. Here is the module:

@Module
public class SimpleModule {

    @Provides
    Cooker providerCooker() {

        return new Cooker("tom", "natie");
    }
}

component:

@Component(modules = SimpleModule.class)
public interface SimpleComponent {

    void inject(DaggerTestActivity activity);

}

Interface:

public interface CoffeeMaker {

    String makeCoffee();
}

Implementation:

  public class SimpleMaker implements CoffeeMaker {

        Cooker mCooker;

        @Inject
        public SimpleMaker(Cooker cooker) {

            this.mCooker = cooker;

        }

        @Override
        public String makeCoffee() {

            return mCooker.makeCoffee();
        }
    }

Plate:

public class Cooker {

    String name; 
    String coffeeKind;


    public Cooker(String name, String coffeeKind) {
        this.name = name;
        this.coffeeKind = coffeeKind;
    }

   public  String  makeCoffee() {

        return name + "make" + coffeeKind; 
    }

}

Coffee machine:

public class CoffeeMachine {

    CoffeeMaker mMaker;

    @Inject
    public CoffeeMachine(CoffeeMaker coffeeMaker) {

        this.mMaker = coffeeMaker;
    }

    public String makeCoffee() {

        return mMaker.makeCoffee();
    }
}

Just this. I use in activit. Here a strange question came up:

    @Inject
    CoffeeMachine mCoffeeMachine;

The error I get from the Dagger 2 compiler is this:

Error:(14, 10) com.wyyc.daggertest.CoffeeMaker cannot be provided without an @Provides-annotated method.
com.wyyc.zqqworkproject.DaggerTestActivity.mCoffeeMachine
[injected field of type: com.wyyc.daggertest.CoffeeMachine mCoffeeMachine]
com.wyyc.daggertest.CoffeeMachine.<init>(com.wyyc.daggertest.CoffeeMaker coffeeMaker)

This whole situation looks very strange, and I would like to hear some data from more experienced users of Dagger 2.

Answer 1

CoffeeMachine CoffeeMaker. , CoffeeMachine @Inject. :

CoffeeMaker @Provides-

, CoffeeMaker. @Inject ing SimpleMaker , SimpleMaker!= CoffeeMaker. , , , CoffeeMaker, SimpleMaker.

:

@Module
public class SimpleModule {

    @Provides
    Cooker providerCooker() {
        return new Cooker("tom", "natie");
    }

    @Provides
    CoffeeMaker provideCoffeeMaker(Cooker cooker) {
        return new SimpleMaker(cooker);
    }

}