このダガー2の簡単な例で何が問題になっていますか？

Question

1 - 範囲：

@Scope 
@Retention(RetentionPolicy.CLASS) 
public @interface PerInstance {} 

2 - AppContextModule：

@Module 
public class AppContextModule { 

Application application; 

public AppContextModule(Application application){ 
    this.application = application; 
} 

@Provides 
public Application application(){ 
    return this.application; 
} 

@Provides 
public Context context(){ 
    return this.application; 
} 

@Provides 
public LocationManager locationManager(Context context){ 
    return (LocationManager)  context.getSystemService(context.LOCATION_SERVICE); 
} 

} 

3 - MeuPrimeiroModule：

@Module 
public class MeuPrimeiroModule { 

@Provides 
@PerInstance 
public String nome() { 
    return new String("Gorick"); 
} 

} 

4 - MeuSegundoModule：

@Module(includes = MeuPrimeiroModule.class) 
public class MeuSegundoModule { 

@Provides 
@Singleton 
public String nomeCompleto(MeuPrimeiroModule meuPrimeiroModule) { 
    return new String(meuPrimeiroModule + " Silva"); 
} 

} 

5 - MeuPrimeiroComponent：

@PerInstance 
@Component(modules={MeuPrimeiroModule.class}) 
public interface MeuPrimeiroComponent { 
void inject(MainActivity mainActivity); 
} 

6 - MeuSegundoComponent：

@Singleton 
@Component(modules={MeuSegundoComponent.class}) 
public interface MeuSegundoComponent extends MeuPrimeiroComponent { 

void inject(MainActivity mainActivity); 
} 

7 - AppContextComponent：

public interface AppContextComponent { 

Application app(); //provision method 
Context applicationContext(); //provision method 
LocationManager locationManager(); //provision method 
} 

8 - ApplicationComponent：

@Singleton 
@Component(modules={AppContextModule.class}) 
public interface ApplicationComponent extends AppContextComponent { 
void inject(MainActivity mainActivity); 
} 

9 - MainActivity：

public class MainActivity extends AppCompatActivity { 

@Inject 
MeuPrimeiroComponent meuPrimeiroComponent; 

@Inject 
MeuSegundoComponent meuSegundoComponent; 

TextView nome, nomeCompleto; 


@Override 
protected void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.activity_main); 

    nome = (TextView) findViewById(R.id.nome); 
    nomeCompleto = (TextView) findViewById(R.id.nomeCompleto); 

    setNome(nome, nomeCompleto); 
} 

public void setNome(TextView nome, TextView nomeCompleto){ 
    nome.setText(meuPrimeiroComponent.toString()); 
    nomeCompleto.setText(meuSegundoComponent.toString()); 
} 

} 

体型：

Error:(16, 10) error: gorick.dagger2.Dagger2.Component.MeuPrimeiroComponent cannot be provided without an @Provides- or @Produces-annotated method. 
gorick.dagger2.Dagger2.Component.MeuPrimeiroComponent is injected at 
gorick.dagger2.MainActivity.meuPrimeiroComponent 
gorick.dagger2.MainActivity is injected at 
gorick.dagger2.Dagger2.Component.ApplicationComponent.inject(mainActivity) 

PS：meuPrimeiroComponent.nome（）を使用すると、アンドロイドスタジオはnome（）メソッドを見つけられません。

Answer 1

あなたが代わりにあなたはそのコンストラクタ詳細は参考のために提供

によってリターンされた値を含むオブジェクトに注入する必要があるコンポーネントの値を挿入することはできませんあなたがonCreate()に、このようなコンポーネントを構築する必要がある。このExample

：

DaggerMeuPrimeiroComponent.builder() 
       // list of modules that are part of this component need to be created here too 
       .appContextModule(new AppContextModule(getApplicationContext())) // This also corresponds to the name of your module: %component_name%Module 
       .build().inject(this);